manage data received buffer from the BLE

The Rx data are stored in a fifo, like the one used for SPI mode

Signed-off-by: Francois Ramu <francois.ramu@st.com>

Author: FRASTM

src/utility/HCISharedMemTransport.cpp

@@ -47,11 +47,16 @@ PLACE_IN_SECTION("MB_MEM2") ALIGN(4) static uint8_t
 	HciAclDataBuffer[sizeof(TL_PacketHeader_t) + 5 + 251];
 
 
+  uint8_t _rxbuff[BLE_MODULE_SHARED_MEM_BUFFER_SIZE];
+  uint16_t _read_index;
+  uint16_t _write_index;
+  uint16_t _write_index_initial;
+
 HCISharedMemTransportClass::HCISharedMemTransportClass(BLEChip_t ble_chip) :
   _ble_chip(ble_chip)
 {
-  _read_index = 0;
-  _write_index = 0;
+  _read_index = 0; /* fifo position when reading */
+  _write_index = 0; /* fifo position when receiving */
   _write_index_initial = 0;
 
   sys_event = false;
@@ -67,12 +72,19 @@ static void evt_received(TL_EvtPacket_t *hcievt)
     switch (hcievt->evtserial.type) {
         case TL_BLEEVT_PKT_TYPE:
             len = hcievt->evtserial.evt.plen + TL_EVT_HDR_SIZE;
-            //TODO: on_data_received((uint8_t *)&hcievt->evtserial, len);
+            /* store received data in the _rxbuff buffer */
+            memcpy((uint8_t *)&_rxbuff, (uint8_t *)&hcievt->evtserial, len);
+            /* move index */
+            _write_index += len;
+            //TODO: control the _rxbuff cannot overflow
             break;
         case TL_ACL_DATA_PKT_TYPE: {
             TL_AclDataSerial_t *acl = &(((TL_AclDataPacket_t *)hcievt)->AclDataSerial);
             len = acl->length + 5;
-            //TODO: on_data_received((uint8_t *)acl, len);
+            memcpy((uint8_t *)&_rxbuff, (uint8_t *)&acl, len);
+            /* move index */
+            _write_index += len;
+            //TODO: control the _rxbuff cannot overflow
         }
         break;
         default:
@@ -703,10 +715,6 @@ size_t HCISharedMemTransportClass::write(const uint8_t* data, size_t length)
     {
         TL_CmdPacket_t *bleCmdBuf = &BleCmdBuffer;
 
-/* this WA will clear the IPCC C1TOC2CSR 0x58000C0C else the next TX irq is not triggered 
-LL_C2_IPCC_ClearFlag_CHx( IPCC, HW_IPCC_SYSTEM_CMD_RSP_CHANNEL );*/
-
-
         // Note: Until enum is avalable
         // type 01 Command
         // type 02 ACL DATA

src/utility/HCISharedMemTransport.h

@@ -90,12 +90,6 @@ class HCISharedMemTransportClass : public HCITransportInterface {
 private:
 
   BLEChip_t _ble_chip;
-
-  uint8_t _rxbuff[BLE_MODULE_SHARED_MEM_BUFFER_SIZE];
-  uint16_t _read_index;
-  uint16_t _write_index;
-  uint16_t _write_index_initial;
-
  };
 
 /******************************************************************************