diff --git a/Makefile b/Makefile
index 30966918c3651..cf6bb47fba6a2 100644
--- a/Makefile
+++ b/Makefile
@@ -45,17 +45,17 @@ TRANSLATE_SOURCES = extmod lib main.c ports/atmel-samd ports/cxd56 ports/espress
 # Each must be preceded by "-path"; if any wildcards, enclose in quotes.
 # Separate by "-o" (Find's "or" operand)
 TRANSLATE_SOURCES_EXC = -path "ports/*/build-*" \
-	-o -path "ports/*/build" \
-	-o -path ports/atmel-samd/asf4 \
-	-o -path ports/cxd56/spresense-exported-sdk \
-	-o -path ports/espressif/esp-idf \
-	-o -path ports/mimxrt10xx/sdk \
-	-o -path ports/raspberrypi/sdk \
-	-o -path ports/stm/st_driver \
-	-o -path lib/tinyusb \
-	-o -path lib/lwip \
-	-o -path extmod/ulab/circuitpython \
-	-o -path extmod/ulab/micropython \
+    -o -path "ports/*/build" \
+    -o -path ports/atmel-samd/asf4 \
+    -o -path ports/cxd56/spresense-exported-sdk \
+    -o -path ports/espressif/esp-idf \
+    -o -path ports/mimxrt10xx/sdk \
+    -o -path ports/raspberrypi/sdk \
+    -o -path ports/stm/st_driver \
+    -o -path lib/tinyusb \
+    -o -path lib/lwip \
+    -o -path extmod/ulab/circuitpython \
+    -o -path extmod/ulab/micropython
 
 .PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext stubs
 
@@ -83,8 +83,8 @@ help:
 	@echo "  pseudoxml  to make pseudoxml-XML files for display purposes"
 	@echo "  linkcheck  to check all external links for integrity"
 	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
-	@echo "  fetch-all-submodules	to fetch submodules for all ports"
-	@echo "  remove-all-submodules	remove all submodules, including files and .git/ data"
+	@echo "  fetch-all-submodules    to fetch submodules for all ports"
+	@echo "  remove-all-submodules    remove all submodules, including files and .git/ data"
 
 clean:
 	rm -rf $(BUILDDIR)/*
@@ -120,13 +120,13 @@ htmlhelp:
 	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
 	@echo
 	@echo "Build finished; now you can run HTML Help Workshop with the" \
-	      ".hhp project file in $(BUILDDIR)/htmlhelp."
+          ".hhp project file in $(BUILDDIR)/htmlhelp."
 
 qthelp:
 	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
 	@echo
 	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
-	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
+          ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
 	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/MicroPython.qhcp"
 	@echo "To view the help file:"
 	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/MicroPython.qhc"
@@ -150,7 +150,7 @@ latex:
 	@echo
 	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
 	@echo "Run \`make' in that directory to run these through (pdf)latex" \
-	      "(use \`make latexpdf' here to do that automatically)."
+          "(use \`make latexpdf' here to do that automatically)."
 
 # seems to be malfunctioning
 latexpdf:
@@ -183,7 +183,7 @@ texinfo:
 	@echo
 	@echo "Build finished. The Texinfo files are in $(BUILDDIR)/texinfo."
 	@echo "Run \`make' in that directory to run these through makeinfo" \
-	      "(use \`make info' here to do that automatically)."
+          "(use \`make info' here to do that automatically)."
 
 info:
 	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
@@ -205,12 +205,12 @@ linkcheck:
 	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
 	@echo
 	@echo "Link check complete; look for any errors in the above output " \
-	      "or in $(BUILDDIR)/linkcheck/output.txt."
+          "or in $(BUILDDIR)/linkcheck/output.txt."
 
 doctest:
 	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
 	@echo "Testing of doctests in the sources finished, look at the " \
-	      "results in $(BUILDDIR)/doctest/output.txt."
+          "results in $(BUILDDIR)/doctest/output.txt."
 
 xml:
 	$(SPHINXBUILD) -b xml $(ALLSPHINXOPTS) $(BUILDDIR)/xml
@@ -226,8 +226,8 @@ pseudoxml:
 .PHONY: all-source
 all-source:
 
-TRANSLATE_CHECK_SUBMODULES=if ! [ -f extmod/ulab/README.md ]; then python tools/ci_fetch_deps.py translate; fi
-TRANSLATE_COMMAND=find $(TRANSLATE_SOURCES) -type d \( $(TRANSLATE_SOURCES_EXC) \) -prune -o -type f \( -iname "*.c" -o -iname "*.h" \) -print | (LC_ALL=C sort) | xgettext -x locale/synthetic.pot -f- -L C -s --add-location=file --keyword=MP_ERROR_TEXT -o - | sed -e '/"POT-Creation-Date: /d'
+TRANSLATE_CHECK_SUBMODULES = if ! [ -f extmod/ulab/README.md ]; then python tools/ci_fetch_deps.py translate; fi
+TRANSLATE_COMMAND = find $(TRANSLATE_SOURCES) -type d \( $(TRANSLATE_SOURCES_EXC) \) -prune -o -type f \( -iname "*.c" -o -iname "*.h" \) -print | (LC_ALL=C sort) | xgettext -x locale/synthetic.pot -f- -L C -s --add-location=file --keyword=MP_ERROR_TEXT -o - | sed -e '/"POT-Creation-Date: /d'
 locale/circuitpython.pot: all-source
 	$(TRANSLATE_CHECK_SUBMODULES)
 	$(TRANSLATE_COMMAND) > $@
diff --git a/lib/crypto-algorithms/sha256.c b/lib/crypto-algorithms/sha256.c
index 1d9484586b97d..2c2ea4696bb3f 100644
--- a/lib/crypto-algorithms/sha256.c
+++ b/lib/crypto-algorithms/sha256.c
@@ -32,129 +32,129 @@
 
 /**************************** VARIABLES *****************************/
 static const WORD k[64] = {
-	0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
-	0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
-	0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
-	0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
-	0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
-	0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
-	0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
-	0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
+    0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
+    0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
+    0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
+    0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
+    0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
+    0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
+    0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
+    0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 };
 
 /*********************** FUNCTION DEFINITIONS ***********************/
 static void sha256_transform(CRYAL_SHA256_CTX *ctx, const BYTE data[])
 {
-	WORD a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
-
-	for (i = 0, j = 0; i < 16; ++i, j += 4)
-		m[i] = ((uint32_t)data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) | (data[j + 3]);
-	for ( ; i < 64; ++i)
-		m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
-
-	a = ctx->state[0];
-	b = ctx->state[1];
-	c = ctx->state[2];
-	d = ctx->state[3];
-	e = ctx->state[4];
-	f = ctx->state[5];
-	g = ctx->state[6];
-	h = ctx->state[7];
-
-	for (i = 0; i < 64; ++i) {
-		t1 = h + EP1(e) + CH(e,f,g) + k[i] + m[i];
-		t2 = EP0(a) + MAJ(a,b,c);
-		h = g;
-		g = f;
-		f = e;
-		e = d + t1;
-		d = c;
-		c = b;
-		b = a;
-		a = t1 + t2;
-	}
-
-	ctx->state[0] += a;
-	ctx->state[1] += b;
-	ctx->state[2] += c;
-	ctx->state[3] += d;
-	ctx->state[4] += e;
-	ctx->state[5] += f;
-	ctx->state[6] += g;
-	ctx->state[7] += h;
+    WORD a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
+
+    for (i = 0, j = 0; i < 16; ++i, j += 4)
+        m[i] = ((uint32_t)data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) | (data[j + 3]);
+    for ( ; i < 64; ++i)
+        m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
+
+    a = ctx->state[0];
+    b = ctx->state[1];
+    c = ctx->state[2];
+    d = ctx->state[3];
+    e = ctx->state[4];
+    f = ctx->state[5];
+    g = ctx->state[6];
+    h = ctx->state[7];
+
+    for (i = 0; i < 64; ++i) {
+        t1 = h + EP1(e) + CH(e,f,g) + k[i] + m[i];
+        t2 = EP0(a) + MAJ(a,b,c);
+        h = g;
+        g = f;
+        f = e;
+        e = d + t1;
+        d = c;
+        c = b;
+        b = a;
+        a = t1 + t2;
+    }
+
+    ctx->state[0] += a;
+    ctx->state[1] += b;
+    ctx->state[2] += c;
+    ctx->state[3] += d;
+    ctx->state[4] += e;
+    ctx->state[5] += f;
+    ctx->state[6] += g;
+    ctx->state[7] += h;
 }
 
 void sha256_init(CRYAL_SHA256_CTX *ctx)
 {
-	ctx->datalen = 0;
-	ctx->bitlen = 0;
-	ctx->state[0] = 0x6a09e667;
-	ctx->state[1] = 0xbb67ae85;
-	ctx->state[2] = 0x3c6ef372;
-	ctx->state[3] = 0xa54ff53a;
-	ctx->state[4] = 0x510e527f;
-	ctx->state[5] = 0x9b05688c;
-	ctx->state[6] = 0x1f83d9ab;
-	ctx->state[7] = 0x5be0cd19;
+    ctx->datalen = 0;
+    ctx->bitlen = 0;
+    ctx->state[0] = 0x6a09e667;
+    ctx->state[1] = 0xbb67ae85;
+    ctx->state[2] = 0x3c6ef372;
+    ctx->state[3] = 0xa54ff53a;
+    ctx->state[4] = 0x510e527f;
+    ctx->state[5] = 0x9b05688c;
+    ctx->state[6] = 0x1f83d9ab;
+    ctx->state[7] = 0x5be0cd19;
 }
 
 void sha256_update(CRYAL_SHA256_CTX *ctx, const BYTE data[], size_t len)
 {
-	WORD i;
-
-	for (i = 0; i < len; ++i) {
-		ctx->data[ctx->datalen] = data[i];
-		ctx->datalen++;
-		if (ctx->datalen == 64) {
-			sha256_transform(ctx, ctx->data);
-			ctx->bitlen += 512;
-			ctx->datalen = 0;
-		}
-	}
+    WORD i;
+
+    for (i = 0; i < len; ++i) {
+        ctx->data[ctx->datalen] = data[i];
+        ctx->datalen++;
+        if (ctx->datalen == 64) {
+            sha256_transform(ctx, ctx->data);
+            ctx->bitlen += 512;
+            ctx->datalen = 0;
+        }
+    }
 }
 
 void sha256_final(CRYAL_SHA256_CTX *ctx, BYTE hash[])
 {
-	WORD i;
-
-	i = ctx->datalen;
-
-	// Pad whatever data is left in the buffer.
-	if (ctx->datalen < 56) {
-		ctx->data[i++] = 0x80;
-		while (i < 56)
-			ctx->data[i++] = 0x00;
-	}
-	else {
-		ctx->data[i++] = 0x80;
-		while (i < 64)
-			ctx->data[i++] = 0x00;
-		sha256_transform(ctx, ctx->data);
-		memset(ctx->data, 0, 56);
-	}
-
-	// Append to the padding the total message's length in bits and transform.
-	ctx->bitlen += ctx->datalen * 8;
-	ctx->data[63] = ctx->bitlen;
-	ctx->data[62] = ctx->bitlen >> 8;
-	ctx->data[61] = ctx->bitlen >> 16;
-	ctx->data[60] = ctx->bitlen >> 24;
-	ctx->data[59] = ctx->bitlen >> 32;
-	ctx->data[58] = ctx->bitlen >> 40;
-	ctx->data[57] = ctx->bitlen >> 48;
-	ctx->data[56] = ctx->bitlen >> 56;
-	sha256_transform(ctx, ctx->data);
-
-	// Since this implementation uses little endian byte ordering and SHA uses big endian,
-	// reverse all the bytes when copying the final state to the output hash.
-	for (i = 0; i < 4; ++i) {
-		hash[i]      = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 4]  = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 8]  = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
-	}
+    WORD i;
+
+    i = ctx->datalen;
+
+    // Pad whatever data is left in the buffer.
+    if (ctx->datalen < 56) {
+        ctx->data[i++] = 0x80;
+        while (i < 56)
+            ctx->data[i++] = 0x00;
+    }
+    else {
+        ctx->data[i++] = 0x80;
+        while (i < 64)
+            ctx->data[i++] = 0x00;
+        sha256_transform(ctx, ctx->data);
+        memset(ctx->data, 0, 56);
+    }
+
+    // Append to the padding the total message's length in bits and transform.
+    ctx->bitlen += ctx->datalen * 8;
+    ctx->data[63] = ctx->bitlen;
+    ctx->data[62] = ctx->bitlen >> 8;
+    ctx->data[61] = ctx->bitlen >> 16;
+    ctx->data[60] = ctx->bitlen >> 24;
+    ctx->data[59] = ctx->bitlen >> 32;
+    ctx->data[58] = ctx->bitlen >> 40;
+    ctx->data[57] = ctx->bitlen >> 48;
+    ctx->data[56] = ctx->bitlen >> 56;
+    sha256_transform(ctx, ctx->data);
+
+    // Since this implementation uses little endian byte ordering and SHA uses big endian,
+    // reverse all the bytes when copying the final state to the output hash.
+    for (i = 0; i < 4; ++i) {
+        hash[i]      = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
+        hash[i + 4]  = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
+        hash[i + 8]  = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
+        hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
+        hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
+        hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
+        hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
+        hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
+    }
 }
diff --git a/lib/crypto-algorithms/sha256.h b/lib/crypto-algorithms/sha256.h
index 9c19472ea292f..366d17e10a044 100644
--- a/lib/crypto-algorithms/sha256.h
+++ b/lib/crypto-algorithms/sha256.h
@@ -21,10 +21,10 @@ typedef unsigned char BYTE;             // 8-bit byte
 typedef unsigned int  WORD;             // 32-bit word, change to "long" for 16-bit machines
 
 typedef struct {
-	BYTE data[64];
-	WORD datalen;
-	unsigned long long bitlen;
-	WORD state[8];
+    BYTE data[64];
+    WORD datalen;
+    unsigned long long bitlen;
+    WORD state[8];
 } CRYAL_SHA256_CTX;
 
 /*********************** FUNCTION DECLARATIONS **********************/
diff --git a/lib/libm/kf_rem_pio2.c b/lib/libm/kf_rem_pio2.c
index cce9eb1ba343d..c31e40242ec86 100644
--- a/lib/libm/kf_rem_pio2.c
+++ b/lib/libm/kf_rem_pio2.c
@@ -62,80 +62,80 @@ two8   =  2.5600000000e+02f, /* 0x43800000 */
 twon8  =  3.9062500000e-03f; /* 0x3b800000 */
 
 #ifdef __STDC__
-	int __kernel_rem_pio2f(float *x, float *y, int e0, int nx, int prec, const __uint8_t *ipio2)
+    int __kernel_rem_pio2f(float *x, float *y, int e0, int nx, int prec, const __uint8_t *ipio2)
 #else
-	int __kernel_rem_pio2f(x,y,e0,nx,prec,ipio2)
-	float x[], y[]; int e0,nx,prec; __uint8_t ipio2[];
+    int __kernel_rem_pio2f(x,y,e0,nx,prec,ipio2)
+    float x[], y[]; int e0,nx,prec; __uint8_t ipio2[];
 #endif
 {
-	__int32_t jz,jx,jv,jp,jk,carry,n,iq[20],i,j,k,m,q0,ih;
-	float z,fw,f[20],fq[20],q[20];
+    __int32_t jz,jx,jv,jp,jk,carry,n,iq[20],i,j,k,m,q0,ih;
+    float z,fw,f[20],fq[20],q[20];
 
     /* initialize jk*/
-	jk = init_jk[prec];
-	jp = jk;
+    jk = init_jk[prec];
+    jp = jk;
 
     /* determine jx,jv,q0, note that 3>q0 */
-	jx =  nx-1;
-	jv = (e0-3)/8; if(jv<0) jv=0;
-	q0 =  e0-8*(jv+1);
+    jx =  nx-1;
+    jv = (e0-3)/8; if(jv<0) jv=0;
+    q0 =  e0-8*(jv+1);
 
     /* set up f[0] to f[jx+jk] where f[jx+jk] = ipio2[jv+jk] */
-	j = jv-jx; m = jx+jk;
-	for(i=0;i<=m;i++,j++) f[i] = (j<0)? zero : (float) ipio2[j];
+    j = jv-jx; m = jx+jk;
+    for(i=0;i<=m;i++,j++) f[i] = (j<0)? zero : (float) ipio2[j];
 
     /* compute q[0],q[1],...q[jk] */
-	for (i=0;i<=jk;i++) {
-	    for(j=0,fw=0.0;j<=jx;j++) fw += x[j]*f[jx+i-j];
-	    q[i] = fw;
-	}
+    for (i=0;i<=jk;i++) {
+        for(j=0,fw=0.0;j<=jx;j++) fw += x[j]*f[jx+i-j];
+        q[i] = fw;
+    }
 
-	jz = jk;
+    jz = jk;
 recompute:
     /* distill q[] into iq[] reversingly */
-	for(i=0,j=jz,z=q[jz];j>0;i++,j--) {
-	    fw    =  (float)((__int32_t)(twon8* z));
-	    iq[i] =  (__int32_t)(z-two8*fw);
-	    z     =  q[j-1]+fw;
-	}
+    for(i=0,j=jz,z=q[jz];j>0;i++,j--) {
+        fw    =  (float)((__int32_t)(twon8* z));
+        iq[i] =  (__int32_t)(z-two8*fw);
+        z     =  q[j-1]+fw;
+    }
 
     /* compute n */
-	z  = scalbnf(z,(int)q0);	/* actual value of z */
-	z -= (float)8.0*floorf(z*(float)0.125);	/* trim off integer >= 8 */
-	n  = (__int32_t) z;
-	z -= (float)n;
-	ih = 0;
-	if(q0>0) {	/* need iq[jz-1] to determine n */
-	    i  = (iq[jz-1]>>(8-q0)); n += i;
-	    iq[jz-1] -= i<<(8-q0);
-	    ih = iq[jz-1]>>(7-q0);
-	}
-	else if(q0==0) ih = iq[jz-1]>>8;
-	else if(z>=(float)0.5) ih=2;
-
-	if(ih>0) {	/* q > 0.5 */
-	    n += 1; carry = 0;
-	    for(i=0;i<jz ;i++) {	/* compute 1-q */
-		j = iq[i];
-		if(carry==0) {
-		    if(j!=0) {
-			carry = 1; iq[i] = 0x100- j;
-		    }
-		} else  iq[i] = 0xff - j;
-	    }
-	    if(q0>0) {		/* rare case: chance is 1 in 12 */
-	        switch(q0) {
-	        case 1:
-	    	   iq[jz-1] &= 0x7f; break;
-	    	case 2:
-	    	   iq[jz-1] &= 0x3f; break;
-	        }
-	    }
-	    if(ih==2) {
-		z = one - z;
-		if(carry!=0) z -= scalbnf(one,(int)q0);
-	    }
-	}
+    z  = scalbnf(z,(int)q0);    /* actual value of z */
+    z -= (float)8.0*floorf(z*(float)0.125);    /* trim off integer >= 8 */
+    n  = (__int32_t) z;
+    z -= (float)n;
+    ih = 0;
+    if(q0>0) {    /* need iq[jz-1] to determine n */
+        i  = (iq[jz-1]>>(8-q0)); n += i;
+        iq[jz-1] -= i<<(8-q0);
+        ih = iq[jz-1]>>(7-q0);
+    }
+    else if(q0==0) ih = iq[jz-1]>>8;
+    else if(z>=(float)0.5) ih=2;
+
+    if(ih>0) {    /* q > 0.5 */
+        n += 1; carry = 0;
+        for(i=0;i<jz ;i++) {    /* compute 1-q */
+            j = iq[i];
+            if(carry==0) {
+                if(j!=0) {
+                    carry = 1; iq[i] = 0x100- j;
+                }
+            } else  iq[i] = 0xff - j;
+        }
+        if(q0>0) {        /* rare case: chance is 1 in 12 */
+            switch(q0) {
+            case 1:
+               iq[jz-1] &= 0x7f; break;
+            case 2:
+               iq[jz-1] &= 0x3f; break;
+            }
+        }
+        if(ih==2) {
+            z = one - z;
+            if(carry!=0) z -= scalbnf(one,(int)q0);
+        }
+    }
 
     /* check if recomputation is needed */
 #pragma GCC diagnostic push
@@ -176,49 +176,49 @@ twon8  =  3.9062500000e-03f; /* 0x3b800000 */
 
     /* convert integer "bit" chunk to floating-point value */
 	fw = scalbnf(one,(int)q0);
-	for(i=jz;i>=0;i--) {
-	    q[i] = fw*(float)iq[i]; fw*=twon8;
-	}
+    for(i=jz;i>=0;i--) {
+        q[i] = fw*(float)iq[i]; fw*=twon8;
+    }
 
     /* compute PIo2[0,...,jp]*q[jz,...,0] */
-	for(i=jz;i>=0;i--) {
-	    for(fw=0.0,k=0;k<=jp&&k<=jz-i;k++) fw += PIo2[k]*q[i+k];
-	    fq[jz-i] = fw;
-	}
+    for(i=jz;i>=0;i--) {
+        for(fw=0.0,k=0;k<=jp&&k<=jz-i;k++) fw += PIo2[k]*q[i+k];
+        fq[jz-i] = fw;
+    }
 
     /* compress fq[] into y[] */
-	switch(prec) {
-	    case 0:
-		fw = 0.0;
-		for (i=jz;i>=0;i--) fw += fq[i];
-		y[0] = (ih==0)? fw: -fw;
-		break;
-	    case 1:
-	    case 2:
-		fw = 0.0;
-		for (i=jz;i>=0;i--) fw += fq[i];
-		y[0] = (ih==0)? fw: -fw;
-		fw = fq[0]-fw;
-		for (i=1;i<=jz;i++) fw += fq[i];
-		y[1] = (ih==0)? fw: -fw;
-		break;
-	    case 3:	/* painful */
-		for (i=jz;i>0;i--) {
-		    fw      = fq[i-1]+fq[i];
-		    fq[i]  += fq[i-1]-fw;
-		    fq[i-1] = fw;
-		}
-		for (i=jz;i>1;i--) {
-		    fw      = fq[i-1]+fq[i];
-		    fq[i]  += fq[i-1]-fw;
-		    fq[i-1] = fw;
-		}
-		for (fw=0.0,i=jz;i>=2;i--) fw += fq[i];
-		if(ih==0) {
-		    y[0] =  fq[0]; y[1] =  fq[1]; y[2] =  fw;
-		} else {
-		    y[0] = -fq[0]; y[1] = -fq[1]; y[2] = -fw;
-		}
+    switch(prec) {
+        case 0:
+            fw = 0.0;
+            for (i=jz;i>=0;i--) fw += fq[i];
+            y[0] = (ih==0)? fw: -fw;
+            break;
+        case 1:
+        case 2:
+            fw = 0.0;
+            for (i=jz;i>=0;i--) fw += fq[i];
+            y[0] = (ih==0)? fw: -fw;
+            fw = fq[0]-fw;
+            for (i=1;i<=jz;i++) fw += fq[i];
+            y[1] = (ih==0)? fw: -fw;
+            break;
+        case 3:    /* painful */
+            for (i=jz;i>0;i--) {
+                fw      = fq[i-1]+fq[i];
+                fq[i]  += fq[i-1]-fw;
+                fq[i-1] = fw;
+            }
+            for (i=jz;i>1;i--) {
+                fw      = fq[i-1]+fq[i];
+                fq[i]  += fq[i-1]-fw;
+                fq[i-1] = fw;
+            }
+            for (fw=0.0,i=jz;i>=2;i--) fw += fq[i];
+            if(ih==0) {
+                y[0] =  fq[0]; y[1] =  fq[1]; y[2] =  fw;
+            } else {
+                y[0] = -fq[0]; y[1] = -fq[1]; y[2] = -fw;
+            }
 	}
 	return n&7;
 }
diff --git a/lib/libm/wf_tgamma.c b/lib/libm/wf_tgamma.c
index 3ff05f331d099..edf20afd85829 100644
--- a/lib/libm/wf_tgamma.c
+++ b/lib/libm/wf_tgamma.c
@@ -27,47 +27,47 @@
 #define _IEEE_LIBM 1
 
 #ifdef __STDC__
-	float tgammaf(float x)
+    float tgammaf(float x)
 #else
-	float tgammaf(x)
-	float x;
+    float tgammaf(x)
+    float x;
 #endif
 {
         float y;
-	int local_signgam;
-	if (!isfinite(x)) {
-	  /* special cases: tgammaf(nan)=nan, tgammaf(inf)=inf, tgammaf(-inf)=nan */
-	  return x + INFINITY;
-	}
-	y = expf(__ieee754_lgammaf_r(x,&local_signgam));
-	if (local_signgam < 0) y = -y;
+    int local_signgam;
+    if (!isfinite(x)) {
+        /* special cases: tgammaf(nan)=nan, tgammaf(inf)=inf, tgammaf(-inf)=nan */
+        return x + INFINITY;
+    }
+    y = expf(__ieee754_lgammaf_r(x,&local_signgam));
+    if (local_signgam < 0) y = -y;
 #ifdef _IEEE_LIBM
-	return y;
+    return y;
 #else
-	if(_LIB_VERSION == _IEEE_) return y;
+    if(_LIB_VERSION == _IEEE_) return y;
 
-	if(!finitef(y)&&finitef(x)) {
-	  if(floorf(x)==x&&x<=(float)0.0)
-	    /* tgammaf pole */
-	    return (float)__kernel_standard((double)x,(double)x,141);
-	  else
-	    /* tgammaf overflow */
-	    return (float)__kernel_standard((double)x,(double)x,140);
-	}
-	return y;
+    if(!finitef(y)&&finitef(x)) {
+        if(floorf(x)==x&&x<=(float)0.0)
+            /* tgammaf pole */
+            return (float)__kernel_standard((double)x,(double)x,141);
+        else
+            /* tgammaf overflow */
+            return (float)__kernel_standard((double)x,(double)x,140);
+    }
+    return y;
 #endif
 }
 
 #ifdef _DOUBLE_IS_32BITS
 
 #ifdef __STDC__
-	double tgamma(double x)
+    double tgamma(double x)
 #else
-	double tgamma(x)
-	double x;
+    double tgamma(x)
+    double x;
 #endif
 {
-	return (double) tgammaf((float) x);
+    return (double) tgammaf((float) x);
 }
 
 #endif /* defined(_DOUBLE_IS_32BITS) */
diff --git a/lib/libm_dbl/atan2.c b/lib/libm_dbl/atan2.c
index 91378b977a25e..be35e72cbaffd 100644
--- a/lib/libm_dbl/atan2.c
+++ b/lib/libm_dbl/atan2.c
@@ -45,18 +45,18 @@ pi_lo  = 1.2246467991473531772E-16; /* 0x3CA1A626, 0x33145C07 */
 
 double atan2(double y, double x)
 {
-	double z;
-	uint32_t m,lx,ly,ix,iy;
+    double z;
+    uint32_t m,lx,ly,ix,iy;
 
-	if (isnan(x) || isnan(y))
-		return x+y;
-	EXTRACT_WORDS(ix, lx, x);
-	EXTRACT_WORDS(iy, ly, y);
-	if (((ix-0x3ff00000) | lx) == 0)  /* x = 1.0 */
-		return atan(y);
-	m = ((iy>>31)&1) | ((ix>>30)&2);  /* 2*sign(x)+sign(y) */
-	ix = ix & 0x7fffffff;
-	iy = iy & 0x7fffffff;
+    if (isnan(x) || isnan(y))
+        return x+y;
+    EXTRACT_WORDS(ix, lx, x);
+    EXTRACT_WORDS(iy, ly, y);
+    if (((ix-0x3ff00000) | lx) == 0)  /* x = 1.0 */
+        return atan(y);
+    m = ((iy>>31)&1) | ((ix>>30)&2);  /* 2*sign(x)+sign(y) */
+    ix = ix & 0x7fffffff;
+    iy = iy & 0x7fffffff;
 
 	/* when y = 0 */
 	if ((iy|ly) == 0) {
diff --git a/lib/libm_dbl/ceil.c b/lib/libm_dbl/ceil.c
index b13e6f2d63689..8bd8fa89102d5 100644
--- a/lib/libm_dbl/ceil.c
+++ b/lib/libm_dbl/ceil.c
@@ -9,23 +9,23 @@ static const double_t toint = 1/EPS;
 
 double ceil(double x)
 {
-	union {double f; uint64_t i;} u = {x};
-	int e = u.i >> 52 & 0x7ff;
-	double_t y;
+    union {double f; uint64_t i;} u = {x};
+    int e = u.i >> 52 & 0x7ff;
+    double_t y;
 
-	if (e >= 0x3ff+52 || x == 0)
-		return x;
-	/* y = int(x) - x, where int(x) is an integer neighbor of x */
-	if (u.i >> 63)
-		y = x - toint + toint - x;
-	else
-		y = x + toint - toint - x;
-	/* special case because of non-nearest rounding modes */
-	if (e <= 0x3ff-1) {
-		FORCE_EVAL(y);
-		return u.i >> 63 ? -0.0 : 1;
-	}
-	if (y < 0)
-		return x + y + 1;
-	return x + y;
+    if (e >= 0x3ff+52 || x == 0)
+        return x;
+    /* y = int(x) - x, where int(x) is an integer neighbor of x */
+    if (u.i >> 63)
+        y = x - toint + toint - x;
+    else
+        y = x + toint - toint - x;
+    /* special case because of non-nearest rounding modes */
+    if (e <= 0x3ff-1) {
+        FORCE_EVAL(y);
+        return u.i >> 63 ? -0.0 : 1;
+    }
+    if (y < 0)
+        return x + y + 1;
+    return x + y;
 }
diff --git a/lib/libm_dbl/sin.c b/lib/libm_dbl/sin.c
index 055e215bc866d..8991645d4e63f 100644
--- a/lib/libm_dbl/sin.c
+++ b/lib/libm_dbl/sin.c
@@ -44,23 +44,23 @@
 
 double sin(double x)
 {
-	double y[2];
-	uint32_t ix;
-	unsigned n;
+    double y[2];
+    uint32_t ix;
+    unsigned n;
 
-	/* High word of x. */
-	GET_HIGH_WORD(ix, x);
-	ix &= 0x7fffffff;
+    /* High word of x. */
+    GET_HIGH_WORD(ix, x);
+    ix &= 0x7fffffff;
 
-	/* |x| ~< pi/4 */
-	if (ix <= 0x3fe921fb) {
-		if (ix < 0x3e500000) {  /* |x| < 2**-26 */
-			/* raise inexact if x != 0 and underflow if subnormal*/
-			FORCE_EVAL(ix < 0x00100000 ? x/0x1p120f : x+0x1p120f);
-			return x;
-		}
-		return __sin(x, 0.0, 0);
-	}
+    /* |x| ~< pi/4 */
+    if (ix <= 0x3fe921fb) {
+        if (ix < 0x3e500000) {  /* |x| < 2**-26 */
+            /* raise inexact if x != 0 and underflow if subnormal*/
+            FORCE_EVAL(ix < 0x00100000 ? x/0x1p120f : x+0x1p120f);
+            return x;
+        }
+        return __sin(x, 0.0, 0);
+    }
 
 	/* sin(Inf or NaN) is NaN */
 	if (ix >= 0x7ff00000)
diff --git a/lib/tinyusb b/lib/tinyusb
index 5217cee5de4cd..1cbf810ad1a96 160000
--- a/lib/tinyusb
+++ b/lib/tinyusb
@@ -1 +1 @@
-Subproject commit 5217cee5de4cd555018da90f9f1bcc87fb1c1d3a
+Subproject commit 1cbf810ad1a96c3a13e40771529307023249feef
diff --git a/lib/tjpgd/src/tjpgd.c b/lib/tjpgd/src/tjpgd.c
index 968a6e23d9101..32927e4a8fa33 100644
--- a/lib/tjpgd/src/tjpgd.c
+++ b/lib/tjpgd/src/tjpgd.c
@@ -116,9 +116,9 @@ static const uint8_t Clip8[1024] = {
 
 static uint8_t BYTECLIP (int val)
 {
-	if (val < 0) return 0;
-	if (val > 255) return 255;
-	return (uint8_t)val;
+    if (val < 0) return 0;
+    if (val > 255) return 255;
+    return (uint8_t)val;
 }
 
 #endif
@@ -129,23 +129,22 @@ static uint8_t BYTECLIP (int val)
 /* Allocate a memory block from memory pool                              */
 /*-----------------------------------------------------------------------*/
 
-static void* alloc_pool (	/* Pointer to allocated memory block (NULL:no memory available) */
-	JDEC* jd,				/* Pointer to the decompressor object */
-	size_t ndata			/* Number of bytes to allocate */
+static void* alloc_pool (    /* Pointer to allocated memory block (NULL:no memory available) */
+    JDEC* jd,              /* Pointer to the decompressor object */
+    size_t ndata          /* Number of bytes to allocate */
 )
 {
-	char *rp = 0;
+    char *rp = 0;
 
+    ndata = (ndata + 3) & ~3;           /* Align block size to the word boundary */
 
-	ndata = (ndata + 3) & ~3;			/* Align block size to the word boundary */
+    if (jd->sz_pool >= ndata) {
+        jd->sz_pool -= ndata;
+        rp = (char*)jd->pool;           /* Get start of available memory pool */
+        jd->pool = (void*)(rp + ndata); /* Allocate requierd bytes */
+    }
 
-	if (jd->sz_pool >= ndata) {
-		jd->sz_pool -= ndata;
-		rp = (char*)jd->pool;			/* Get start of available memory pool */
-		jd->pool = (void*)(rp + ndata);	/* Allocate requierd bytes */
-	}
-
-	return (void*)rp;	/* Return allocated memory block (NULL:no memory to allocate) */
+    return (void*)rp;    /* Return allocated memory block (NULL:no memory to allocate) */
 }
 
 
@@ -155,15 +154,15 @@ static void* alloc_pool (	/* Pointer to allocated memory block (NULL:no memory a
 /* Create de-quantization and prescaling tables with a DQT segment       */
 /*-----------------------------------------------------------------------*/
 
-static JRESULT create_qt_tbl (	/* 0:OK, !0:Failed */
-	JDEC* jd,				/* Pointer to the decompressor object */
-	const uint8_t* data,	/* Pointer to the quantizer tables */
-	size_t ndata			/* Size of input data */
+static JRESULT create_qt_tbl (    /* 0:OK, !0:Failed */
+    JDEC* jd,              /* Pointer to the decompressor object */
+    const uint8_t* data,   /* Pointer to the quantizer tables */
+    size_t ndata          /* Size of input data */
 )
 {
-	unsigned int i, zi;
-	uint8_t d;
-	int32_t *pb;
+    unsigned int i, zi;
+    uint8_t d;
+    int32_t *pb;
 
 
 	while (ndata) {	/* Process all tables in the segment */
diff --git a/lib/tjpgd/src/tjpgd.h b/lib/tjpgd/src/tjpgd.h
index 4983ac7271a8e..a1cd2fb23c787 100644
--- a/lib/tjpgd/src/tjpgd.h
+++ b/lib/tjpgd/src/tjpgd.h
@@ -30,25 +30,25 @@ typedef uint8_t jd_yuv_t;
 
 /* Error code */
 typedef enum {
-	JDR_OK = 0,	/* 0: Succeeded */
-	JDR_INTR,	/* 1: Interrupted by output function */
-	JDR_INP,	/* 2: Device error or wrong termination of input stream */
-	JDR_MEM1,	/* 3: Insufficient memory pool for the image */
-	JDR_MEM2,	/* 4: Insufficient stream input buffer */
-	JDR_PAR,	/* 5: Parameter error */
-	JDR_FMT1,	/* 6: Data format error (may be broken data) */
-	JDR_FMT2,	/* 7: Right format but not supported */
-	JDR_FMT3	/* 8: Not supported JPEG standard */
+    JDR_OK = 0,  /* 0: Succeeded */
+    JDR_INTR,    /* 1: Interrupted by output function */
+    JDR_INP,     /* 2: Device error or wrong termination of input stream */
+    JDR_MEM1,    /* 3: Insufficient memory pool for the image */
+    JDR_MEM2,    /* 4: Insufficient stream input buffer */
+    JDR_PAR,     /* 5: Parameter error */
+    JDR_FMT1,    /* 6: Data format error (may be broken data) */
+    JDR_FMT2,    /* 7: Right format but not supported */
+    JDR_FMT3     /* 8: Not supported JPEG standard */
 } JRESULT;
 
 
 
 /* Rectangular region in the output image */
 typedef struct {
-	uint16_t left;		/* Left end */
-	uint16_t right;		/* Right end */
-	uint16_t top;		/* Top end */
-	uint16_t bottom;	/* Bottom end */
+    uint16_t left;     /* Left end */
+    uint16_t right;    /* Right end */
+    uint16_t top;      /* Top end */
+    uint16_t bottom;   /* Bottom end */
 } JRECT;
 
 
@@ -56,36 +56,36 @@ typedef struct {
 /* Decompressor object structure */
 typedef struct JDEC JDEC;
 struct JDEC {
-	size_t dctr;				/* Number of bytes available in the input buffer */
-	uint8_t* dptr;				/* Current data read ptr */
-	uint8_t* inbuf;				/* Bit stream input buffer */
-	uint8_t dbit;				/* Number of bits availavble in wreg or reading bit mask */
-	uint8_t scale;				/* Output scaling ratio */
-	uint8_t msx, msy;			/* MCU size in unit of block (width, height) */
-	uint8_t qtid[3];			/* Quantization table ID of each component, Y, Cb, Cr */
-	uint8_t ncomp;				/* Number of color components 1:grayscale, 3:color */
-	int16_t dcv[3];				/* Previous DC element of each component */
-	uint16_t nrst;				/* Restart inverval */
-	uint16_t width, height;		/* Size of the input image (pixel) */
-	uint8_t* huffbits[2][2];	/* Huffman bit distribution tables [id][dcac] */
-	uint16_t* huffcode[2][2];	/* Huffman code word tables [id][dcac] */
-	uint8_t* huffdata[2][2];	/* Huffman decoded data tables [id][dcac] */
-	int32_t* qttbl[4];			/* Dequantizer tables [id] */
+    size_t dctr;              /* Number of bytes available in the input buffer */
+    uint8_t* dptr;             /* Current data read ptr */
+    uint8_t* inbuf;            /* Bit stream input buffer */
+    uint8_t dbit;              /* Number of bits availavble in wreg or reading bit mask */
+    uint8_t scale;             /* Output scaling ratio */
+    uint8_t msx, msy;          /* MCU size in unit of block (width, height) */
+    uint8_t qtid[3];           /* Quantization table ID of each component, Y, Cb, Cr */
+    uint8_t ncomp;             /* Number of color components 1:grayscale, 3:color */
+    int16_t dcv[3];            /* Previous DC element of each component */
+    uint16_t nrst;             /* Restart inverval */
+    uint16_t width, height;    /* Size of the input image (pixel) */
+    uint8_t* huffbits[2][2];   /* Huffman bit distribution tables [id][dcac] */
+    uint16_t* huffcode[2][2];  /* Huffman code word tables [id][dcac] */
+    uint8_t* huffdata[2][2];   /* Huffman decoded data tables [id][dcac] */
+    int32_t* qttbl[4];         /* Dequantizer tables [id] */
 #if JD_FASTDECODE >= 1
-	uint32_t wreg;				/* Working shift register */
-	uint8_t marker;				/* Detected marker (0:None) */
+    uint32_t wreg;             /* Working shift register */
+    uint8_t marker;             /* Detected marker (0:None) */
 #if JD_FASTDECODE == 2
-	uint8_t longofs[2][2];		/* Table offset of long code [id][dcac] */
-	uint16_t* hufflut_ac[2];	/* Fast huffman decode tables for AC short code [id] */
-	uint8_t* hufflut_dc[2];		/* Fast huffman decode tables for DC short code [id] */
+    uint8_t longofs[2][2];      /* Table offset of long code [id][dcac] */
+    uint16_t* hufflut_ac[2];    /* Fast huffman decode tables for AC short code [id] */
+    uint8_t* hufflut_dc[2];     /* Fast huffman decode tables for DC short code [id] */
 #endif
 #endif
-	void* workbuf;				/* Working buffer for IDCT and RGB output */
-	jd_yuv_t* mcubuf;			/* Working buffer for the MCU */
-	void* pool;					/* Pointer to available memory pool */
-	size_t sz_pool;				/* Size of momory pool (bytes available) */
-	size_t (*infunc)(JDEC*, uint8_t*, size_t);	/* Pointer to jpeg stream input function */
-	void* device;				/* Pointer to I/O device identifiler for the session */
+    void* workbuf;              /* Working buffer for IDCT and RGB output */
+    jd_yuv_t* mcubuf;          /* Working buffer for the MCU */
+    void* pool;                 /* Pointer to available memory pool */
+    size_t sz_pool;            /* Size of momory pool (bytes available) */
+    size_t (*infunc)(JDEC*, uint8_t*, size_t);    /* Pointer to jpeg stream input function */
+    void* device;              /* Pointer to I/O device identifiler for the session */
 };
 
 
diff --git a/locale/circuitpython.pot b/locale/circuitpython.pot
index a6acb8a644fb3..d878812ec928f 100644
--- a/locale/circuitpython.pot
+++ b/locale/circuitpython.pot
@@ -1274,6 +1274,7 @@ msgid "Invalid socket for TLS"
 msgstr ""
 
 #: ports/espressif/common-hal/espidf/__init__.c
+#: ports/nordic/common-hal/_bleio/__init__.c
 msgid "Invalid state"
 msgstr ""
 
@@ -1970,7 +1971,8 @@ msgstr ""
 msgid "The length of rgb_pins must be 6, 12, 18, 24, or 30"
 msgstr ""
 
-#: shared-module/audiodelays/Echo.c shared-module/audiomixer/MixerVoice.c
+#: shared-module/audiodelays/Echo.c shared-module/audiofilters/Filter.c
+#: shared-module/audiomixer/MixerVoice.c
 msgid "The sample's %q does not match"
 msgstr ""
 
@@ -2504,7 +2506,8 @@ msgstr ""
 msgid "bits must be 32 or less"
 msgstr ""
 
-#: shared-bindings/audiodelays/Echo.c shared-bindings/audiomixer/Mixer.c
+#: shared-bindings/audiodelays/Echo.c shared-bindings/audiofilters/Filter.c
+#: shared-bindings/audiomixer/Mixer.c
 msgid "bits_per_sample must be 8 or 16"
 msgstr ""
 
@@ -2585,7 +2588,7 @@ msgstr ""
 msgid "can't cancel self"
 msgstr ""
 
-#: shared-module/adafruit_pixelbuf/PixelBuf.c
+#: py/obj.c shared-module/adafruit_pixelbuf/PixelBuf.c
 msgid "can't convert %q to %q"
 msgstr ""
 
diff --git a/mpy-cross/Makefile b/mpy-cross/Makefile
index 9962e9bcbb246..5963b2cf2de7e 100644
--- a/mpy-cross/Makefile
+++ b/mpy-cross/Makefile
@@ -50,17 +50,17 @@ LDFLAGS += $(LDFLAGS_MOD) $(LDFLAGS_ARCH) -lm $(LDFLAGS_EXTRA)
 # source files
 # CIRCUITPY-CHANGE: extra files
 SRC_C = \
-	main.c \
-	gccollect.c \
-	shared/runtime/gchelper_generic.c \
-	supervisor/stub/safe_mode.c \
-	supervisor/stub/stack.c \
-	supervisor/shared/translate/translate.c
+    main.c \
+    gccollect.c \
+    shared/runtime/gchelper_generic.c \
+    supervisor/stub/safe_mode.c \
+    supervisor/stub/stack.c \
+    supervisor/shared/translate/translate.c
 
 # Add fmode when compiling with mingw gcc
 COMPILER_TARGET := $(shell $(CC) -dumpmachine)
 ifneq (,$(findstring mingw,$(COMPILER_TARGET)))
-	SRC_C += windows-fmode.c
+    SRC_C += windows-fmode.c
 endif
 
 OBJ = $(PY_CORE_O)
diff --git a/ports/espressif/tools/decode_backtrace.py b/ports/espressif/tools/decode_backtrace.py
index 6d2772d39f77b..1c23af225c542 100644
--- a/ports/espressif/tools/decode_backtrace.py
+++ b/ports/espressif/tools/decode_backtrace.py
@@ -1,10 +1,9 @@
 """Simple script that translates "Backtrace:" lines from the ESP output to files
-   and line numbers.
+and line numbers.
 
-   Run with: python3 tools/decode_backtrace.py <board>
+Run with: python3 tools/decode_backtrace.py <board>
 
-   Enter the backtrace line at the "? " prompt. CTRL-C to exit the script.
-   """
+Enter the backtrace line at the "? " prompt. CTRL-C to exit the script."""
 
 import subprocess
 import sys
diff --git a/ports/espressif/tools/update_sdkconfig.py b/ports/espressif/tools/update_sdkconfig.py
index c1e7ebd349c23..74447de76caec 100644
--- a/ports/espressif/tools/update_sdkconfig.py
+++ b/ports/espressif/tools/update_sdkconfig.py
@@ -1,5 +1,5 @@
 """This script updates the sdkconfigs based on the menuconfig results in a given
-   build."""
+build."""
 
 import pathlib
 import click
diff --git a/ports/stm/boards/cygnet/board.c b/ports/stm/boards/cygnet/board.c
index f6650fb8f9c33..5ac520bc32a28 100644
--- a/ports/stm/boards/cygnet/board.c
+++ b/ports/stm/boards/cygnet/board.c
@@ -16,6 +16,10 @@
 #include "shared-bindings/digitalio/DriveMode.h"
 #include "board.h"
 
+// Forward declarations for USB suspend/resume hooks
+void board_usb_suspend_hook(void);
+void board_usb_resume_hook(void);
+
 digitalio_digitalinout_obj_t power_pin = { .base.type = &digitalio_digitalinout_type };
 digitalio_digitalinout_obj_t discharge_pin = { .base.type = &digitalio_digitalinout_type };
 
@@ -56,9 +60,8 @@ void board_init(void) {
     // enable the debugger while sleeping. Todo move somewhere more central (kind of generally useful in a debug build)
     SET_BIT(DBGMCU->CR, DBGMCU_CR_DBG_SLEEP);
 
-    //  Set tick interrupt priority, default HAL value is intentionally invalid
-    //  Without this, USB does not function.
-    HAL_InitTick((1UL << __NVIC_PRIO_BITS) - 1UL);
+    //  Set tick interrupt priority lower than USB to ensure proper operation
+    HAL_InitTick(2);
 
     __HAL_RCC_GPIOA_CLK_ENABLE();
     GPIO_InitTypeDef GPIO_InitStruct;
@@ -76,4 +79,32 @@ void reset_board(void) {
     initialize_discharge_pin();
 }
 
+void board_usb_suspend_hook(void) {
+    // Disable unused peripherals to reduce power consumption
+    __HAL_RCC_GPIOA_CLK_DISABLE();
+    __HAL_RCC_GPIOB_CLK_DISABLE();
+    __HAL_RCC_GPIOH_CLK_DISABLE();
+
+    // Enter Stop 1 mode with regulator in low-power mode
+    HAL_PWREx_EnterSTOP1Mode(PWR_STOPENTRY_WFI);
+}
+
+void board_usb_resume_hook(void) {
+    // Re-enable GPIO clocks
+    __HAL_RCC_GPIOA_CLK_ENABLE();
+    __HAL_RCC_GPIOB_CLK_ENABLE();
+    __HAL_RCC_GPIOH_CLK_ENABLE();
+
+    // Reconfigure system clock after waking from STOP mode
+    SystemClock_Config();
+
+    // Re-initialize GPIO pins
+    GPIO_InitTypeDef GPIO_InitStruct;
+    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
+    GPIO_InitStruct.Pin = GPIO_PIN_8;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+}
+
 // Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.
diff --git a/ports/stm/boards/cygnet/board.h b/ports/stm/boards/cygnet/board.h
index ce199359ba496..54297146cdab0 100644
--- a/ports/stm/boards/cygnet/board.h
+++ b/ports/stm/boards/cygnet/board.h
@@ -10,3 +10,7 @@
 
 extern digitalio_digitalinout_obj_t power_pin;
 extern digitalio_digitalinout_obj_t discharge_pin;
+
+// USB power management hooks
+void board_usb_suspend_hook(void);
+void board_usb_resume_hook(void);
diff --git a/ports/stm/peripherals/periph.h b/ports/stm/peripherals/periph.h
index 4960125d90f12..571247964d141 100644
--- a/ports/stm/peripherals/periph.h
+++ b/ports/stm/peripherals/periph.h
@@ -21,11 +21,11 @@ typedef struct {
 } mcu_periph_obj_t;
 
 #define PERIPH(index, alt, p_pin)       \
-        { \
-            .periph_index = index, \
-            .altfn_index = alt, \
-            .pin = p_pin, \
-        }
+    { \
+        .periph_index = index, \
+        .altfn_index = alt, \
+        .pin = p_pin, \
+    }
 
 // Timer Peripheral
 
@@ -37,12 +37,12 @@ typedef struct {
 } mcu_tim_pin_obj_t;
 
 #define TIM(index, alt, channel, tim_pin)       \
-        { \
-            .tim_index = index - 1, \
-            .altfn_index = alt, \
-            .channel_index = channel - 1, \
-            .pin = tim_pin, \
-        }
+    { \
+        .tim_index = index - 1, \
+        .altfn_index = alt, \
+        .channel_index = channel - 1, \
+        .pin = tim_pin, \
+    }
 
 // F4 Series
 // Access Lines
diff --git a/ports/stm/peripherals/pins.h b/ports/stm/peripherals/pins.h
index c91879939552e..3fffd70423702 100644
--- a/ports/stm/peripherals/pins.h
+++ b/ports/stm/peripherals/pins.h
@@ -32,24 +32,24 @@ typedef struct {
 // but all 3 ADCs will share the same input number per pin.
 // F4 family has 3 ADC max, 24 channels max.
 #define ADC_INPUT(mask, number) \
-        .adc_unit = mask, \
-        .adc_channel = number,
+    .adc_unit = mask, \
+    .adc_channel = number,
 
 #define NO_ADC \
-        .adc_unit = 0x00, \
-        .adc_channel = 0x1f
+    .adc_unit = 0x00, \
+    .adc_channel = 0x1f
 
 extern const mp_obj_type_t mcu_pin_type;
 
 // STM32 can have up to 9 ports, each restricted to 16 pins
 // We split the pin/port evenly, in contrast to nrf.
 #define PIN(p_port, p_number, p_adc)       \
-        { \
-            { &mcu_pin_type }, \
-            .port = p_port, \
-            .number = p_number, \
-            p_adc \
-        }
+    { \
+        { &mcu_pin_type }, \
+        .port = p_port, \
+        .number = p_number, \
+        p_adc \
+    }
 
 // Use illegal pin value to mark unassigned pins.
 #define NO_PIN 0xff
diff --git a/ports/stm/peripherals/stm32l4/clocks.c b/ports/stm/peripherals/stm32l4/clocks.c
index d4cf3312efe14..b562687235d44 100644
--- a/ports/stm/peripherals/stm32l4/clocks.c
+++ b/ports/stm/peripherals/stm32l4/clocks.c
@@ -88,6 +88,23 @@ void stm32_peripherals_clocks_init(void) {
 
     HAL_CHECK(HAL_RCC_OscConfig(&RCC_OscInitStruct));
 
+    #ifdef STM32L433xx
+    /* Enable CRS clock */
+    __HAL_RCC_CRS_CLK_ENABLE();
+
+    /* Configure CRS */
+    RCC_CRSInitTypeDef RCC_CRSInitStruct = {0};
+    RCC_CRSInitStruct.Prescaler = RCC_CRS_SYNC_DIV1;
+    RCC_CRSInitStruct.Source = RCC_CRS_SYNC_SOURCE_USB;
+    RCC_CRSInitStruct.Polarity = RCC_CRS_SYNC_POLARITY_RISING;
+    RCC_CRSInitStruct.ReloadValue = __HAL_RCC_CRS_RELOADVALUE_CALCULATE(48000000, 1000);
+    RCC_CRSInitStruct.ErrorLimitValue = 34;
+    RCC_CRSInitStruct.HSI48CalibrationValue = 32;
+
+    /* Start automatic synchronization */
+    HAL_RCCEx_CRSConfig(&RCC_CRSInitStruct);
+    #endif
+
     #ifdef STM32L4R5xx
     /* Enable MSI Auto-calibration through LSE */
     HAL_RCCEx_EnableMSIPLLMode();
diff --git a/ports/stm/supervisor/internal_flash.h b/ports/stm/supervisor/internal_flash.h
index 0ecfcbf12a0be..a21764b44a0c9 100644
--- a/ports/stm/supervisor/internal_flash.h
+++ b/ports/stm/supervisor/internal_flash.h
@@ -98,4 +98,4 @@
 #define STM32_FLASH_OFFSET 0x8000000 // All STM32 chips map to this flash location
 
 #define INTERNAL_FLASH_SYSTICK_MASK     (0x1ff) // 512ms
-#define INTERNAL_FLASH_IDLE_TICK(tick)  (((tick)&INTERNAL_FLASH_SYSTICK_MASK) == 2)
+#define INTERNAL_FLASH_IDLE_TICK(tick)  (((tick) & INTERNAL_FLASH_SYSTICK_MASK) == 2)
diff --git a/ports/stm/supervisor/usb.c b/ports/stm/supervisor/usb.c
index 86acdc49b34e6..56055e1875461 100644
--- a/ports/stm/supervisor/usb.c
+++ b/ports/stm/supervisor/usb.c
@@ -13,6 +13,34 @@
 
 #include "common-hal/microcontroller/Pin.h"
 
+#ifdef STM32L433xx
+static void enter_low_power_mode(void) {
+    // Enable low-power mode in USB peripheral
+    USB->CNTR |= USB_CNTR_LPMODE;
+
+    // Enter STOP mode with regulator in low-power mode
+    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
+    HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
+}
+
+static void exit_low_power_mode(void) {
+    // Disable low-power mode in USB peripheral
+    USB->CNTR &= ~USB_CNTR_LPMODE;
+
+    // System will automatically exit STOP mode on interrupt
+    // Reconfigure the system clock if needed
+    SystemClock_Config();
+}
+
+void board_usb_suspend_hook(void) {
+    enter_low_power_mode();
+}
+
+void board_usb_resume_hook(void) {
+    exit_low_power_mode();
+}
+#endif
+
 static void init_usb_vbus_sense(void) {
 
     #if (BOARD_NO_VBUS_SENSE)
@@ -46,6 +74,15 @@ static void init_usb_vbus_sense(void) {
 }
 
 void init_usb_hardware(void) {
+    #ifdef STM32L433xx
+    /* Set USB interrupt priority */
+    HAL_NVIC_SetPriority(USB_IRQn, 1, 0);
+    HAL_NVIC_EnableIRQ(USB_IRQn);
+
+    /* Enable wakeup interrupt for USB resume */
+    HAL_NVIC_EnableIRQ(USB_WKUP_IRQn);
+    HAL_NVIC_SetPriority(USB_WKUP_IRQn, 1, 0);
+    #endif
 
     /* Enable USB power on Pwrctrl CR2 register */
     #ifdef PWR_CR2_USV
@@ -132,3 +169,13 @@ void init_usb_hardware(void) {
 void OTG_FS_IRQHandler(void) {
     usb_irq_handler(0);
 }
+
+#ifdef STM32L433xx
+void USB_WKUP_IRQHandler(void) {
+    // Clear wakeup flag
+    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
+
+    // Handle USB wakeup
+    board_usb_resume_hook();
+}
+#endif
diff --git a/shared-bindings/epaperdisplay/__init__.c b/shared-bindings/epaperdisplay/__init__.c
index 1b18212a35a39..5e4313d56d566 100644
--- a/shared-bindings/epaperdisplay/__init__.c
+++ b/shared-bindings/epaperdisplay/__init__.c
@@ -13,15 +13,14 @@
 #include "shared-bindings/epaperdisplay/__init__.h"
 #include "shared-bindings/epaperdisplay/EPaperDisplay.h"
 
-//| """Displays a `displayio` object tree on an e-paper display
+//| """Displays a `displayio` object tree on an e-paper display"""
 //|
-//| """
 
 static const mp_rom_map_elem_t epaperdisplay_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_displayio) },
-
-    { MP_ROM_QSTR(MP_QSTR_EPaperDisplay), MP_ROM_PTR(&epaperdisplay_epaperdisplay_type) },
+    { MP_ROM_QSTR(MP_QSTR_EPaperDisplay), MP_ROM_PTR(&epaperdisplay_epaperdisplay_type) }
 };
+
 static MP_DEFINE_CONST_DICT(epaperdisplay_module_globals, epaperdisplay_module_globals_table);
 
 const mp_obj_module_t epaperdisplay_module = {
diff --git a/shared-bindings/fourwire/__init__.c b/shared-bindings/fourwire/__init__.c
index 34542db97a7e1..186df6457a861 100644
--- a/shared-bindings/fourwire/__init__.c
+++ b/shared-bindings/fourwire/__init__.c
@@ -13,15 +13,14 @@
 #include "shared-bindings/fourwire/__init__.h"
 #include "shared-bindings/fourwire/FourWire.h"
 
-//| """Connects to a BusDisplay over a four wire bus
+//| """Connects to a BusDisplay over a four wire bus"""
 //|
-//| """
 
 static const mp_rom_map_elem_t fourwire_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_fourwire) },
-
-    { MP_ROM_QSTR(MP_QSTR_FourWire), MP_ROM_PTR(&fourwire_fourwire_type) },
+    { MP_ROM_QSTR(MP_QSTR_FourWire), MP_ROM_PTR(&fourwire_fourwire_type) }
 };
+
 static MP_DEFINE_CONST_DICT(fourwire_module_globals, fourwire_module_globals_table);
 
 const mp_obj_module_t fourwire_module = {
diff --git a/shared-bindings/gifio/__init__.c b/shared-bindings/gifio/__init__.c
index 057d18ce82d47..7c77041309fff 100644
--- a/shared-bindings/gifio/__init__.c
+++ b/shared-bindings/gifio/__init__.c
@@ -10,12 +10,13 @@
 #include "shared-bindings/gifio/OnDiskGif.h"
 #include "shared-bindings/util.h"
 
-//| """Access GIF-format images
-//| """
+//| """Access GIF-format images"""
+//|
+
 static const mp_rom_map_elem_t gifio_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_gifio) },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_GifWriter),  MP_ROM_PTR(&gifio_gifwriter_type)},
-    { MP_ROM_QSTR(MP_QSTR_OnDiskGif), MP_ROM_PTR(&gifio_ondiskgif_type) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_GifWriter), MP_ROM_PTR(&gifio_gifwriter_type) },
+    { MP_ROM_QSTR(MP_QSTR_OnDiskGif), MP_ROM_PTR(&gifio_ondiskgif_type) }
 };
 
 static MP_DEFINE_CONST_DICT(gifio_module_globals, gifio_module_globals_table);
diff --git a/shared-bindings/i2cdisplaybus/__init__.c b/shared-bindings/i2cdisplaybus/__init__.c
index 45be89668f028..b6ddf8154134c 100644
--- a/shared-bindings/i2cdisplaybus/__init__.c
+++ b/shared-bindings/i2cdisplaybus/__init__.c
@@ -13,15 +13,14 @@
 #include "shared-bindings/i2cdisplaybus/__init__.h"
 #include "shared-bindings/i2cdisplaybus/I2CDisplayBus.h"
 
-//| """Communicates to a display IC over I2C
+//| """Communicates to a display IC over I2C"""
 //|
-//| """
 
 static const mp_rom_map_elem_t i2cdisplaybus_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_i2cdisplaybus) },
-
-    { MP_ROM_QSTR(MP_QSTR_I2CDisplayBus), MP_ROM_PTR(&i2cdisplaybus_i2cdisplaybus_type) },
+    { MP_ROM_QSTR(MP_QSTR_I2CDisplayBus), MP_ROM_PTR(&i2cdisplaybus_i2cdisplaybus_type) }
 };
+
 static MP_DEFINE_CONST_DICT(i2cdisplaybus_module_globals, i2cdisplaybus_module_globals_table);
 
 const mp_obj_module_t i2cdisplaybus_module = {
diff --git a/shared-bindings/onewireio/__init__.c b/shared-bindings/onewireio/__init__.c
index bce56326b1ad9..2c61015c6b40a 100644
--- a/shared-bindings/onewireio/__init__.c
+++ b/shared-bindings/onewireio/__init__.c
@@ -17,11 +17,13 @@
 
 //| """Low-level bit primitives for Maxim (formerly Dallas Semi) one-wire protocol.
 //|
-//|    Protocol definition is here: https://www.analog.com/en/technical-articles/1wire-communication-through-software.html"""
+//| Protocol definition is here: https://www.analog.com/en/technical-articles/1wire-communication-through-software.html
+//| """
+//|
 
 static const mp_rom_map_elem_t onewireio_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_onewireio) },
-    { MP_ROM_QSTR(MP_QSTR_OneWire),   MP_ROM_PTR(&onewireio_onewire_type) },
+    { MP_ROM_QSTR(MP_QSTR_OneWire), MP_ROM_PTR(&onewireio_onewire_type) }
 };
 
 static MP_DEFINE_CONST_DICT(onewireio_module_globals, onewireio_module_globals_table);
diff --git a/tools/ci_changes_per_commit.py b/tools/ci_changes_per_commit.py
index 6cbd475fa95b7..53e254832d819 100644
--- a/tools/ci_changes_per_commit.py
+++ b/tools/ci_changes_per_commit.py
@@ -152,18 +152,21 @@ def get_commit_depth_and_check_suite(query_commits):
                 commit_depth += 1
                 commit = commit["commit"]
                 commit_sha = commit["oid"]
-                check_suites = commit["checkSuites"]
-                if check_suites["totalCount"] > 0:
-                    for check_suite in check_suites["nodes"]:
-                        if check_suite["workflowRun"]["workflow"]["name"] == "Build CI":
-                            return [
-                                {"sha": commit_sha, "depth": commit_depth},
-                                (
-                                    check_suite["id"]
-                                    if check_suite["conclusion"] != "SUCCESS"
-                                    else None
-                                ),
-                            ]
+                check_suites = commit.get("checkSuites", {})
+                if check_suites.get("totalCount", 0) > 0:
+                    for check_suite in check_suites.get("nodes", []):
+                        workflow_run = check_suite.get("workflowRun")
+                        if workflow_run is not None:
+                            workflow = workflow_run.get("workflow")
+                            if workflow is not None and workflow.get("name") == "Build CI":
+                                return [
+                                    {"sha": commit_sha, "depth": commit_depth},
+                                    (
+                                        check_suite["id"]
+                                        if check_suite.get("conclusion") != "SUCCESS"
+                                        else None
+                                    ),
+                                ]
         if not query_commits.paginate(commits["pageInfo"], "beforeCommit"):
             return [None, None]
 
diff --git a/tools/cortex-m-fault-gdb.py b/tools/cortex-m-fault-gdb.py
index 8de754ed26056..500ba9c0cb7bb 100644
--- a/tools/cortex-m-fault-gdb.py
+++ b/tools/cortex-m-fault-gdb.py
@@ -1,5 +1,5 @@
 """Source this file into gdb `source ../../tools/cortex-m-fault-gdb.py` then run
-   `cortex-m-fault` to print basic info about the fault registers."""
+`cortex-m-fault` to print basic info about the fault registers."""
 
 SCS = 0xE000E000
 SCB = SCS + 0x0D00
diff --git a/tools/gdb-stack-size.py b/tools/gdb-stack-size.py
index 4d3fc9fe08aa1..6feabdd38164c 100644
--- a/tools/gdb-stack-size.py
+++ b/tools/gdb-stack-size.py
@@ -1,5 +1,5 @@
 """Source this file into gdb `source ../../tools/gdb-stack-size.py` then run
-   `stack-size` to print a backtrace with each frame size next to it."""
+`stack-size` to print a backtrace with each frame size next to it."""
 
 
 class StackSize(gdb.Command):
diff --git a/tools/stack-loc-to-pc.py b/tools/stack-loc-to-pc.py
index a1ce788f2b652..341d46b6bd3f9 100644
--- a/tools/stack-loc-to-pc.py
+++ b/tools/stack-loc-to-pc.py
@@ -1,10 +1,10 @@
 """Prints the pcs that access each stack location in a function. Useful for finding
-   infrequently used stack space.
+infrequently used stack space.
 
-   Pipe in disassembly like so:
+Pipe in disassembly like so:
 
-   arm-none-eabi-objdump --disassemble=mp_execute_bytecode build-metro_m0_express/firmware.elf | python ../../tools/stack-loc-to-pc.py
-   """
+arm-none-eabi-objdump --disassemble=mp_execute_bytecode build-metro_m0_express/firmware.elf | python ../../tools/stack-loc-to-pc.py
+"""
 
 import sys
 import re
@@ -15,11 +15,12 @@
 for line in sys.stdin:
     if "sp" in line:
         m = offset.search(line)
-        o = int(m.groups()[0])
-        pc = line.split(":")[0]
-        if o not in offsets:
-            offsets[o] = []
-        offsets[o].append(pc.strip())
+        if m:
+            o = int(m.groups()[0])
+            pc = line.split(":")[0].strip()
+            if o not in offsets:
+                offsets[o] = []
+            offsets[o].append(pc)
 
 print("Offset", "Size", "PCs", sep="\t")
 last_o = 0