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esp32-core: Fix BOARD_CLOCK_FREQUENCY #413

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Merged
jerpelea merged 1 commit into from
Mar 6, 2020
Merged

esp32-core: Fix BOARD_CLOCK_FREQUENCY #413

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12 changes: 11 additions & 1 deletion boards/xtensa/esp32/esp32-core/include/board.h
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Original file line number Diff line number Diff line change
Expand Up @@ -63,10 +63,20 @@
* Don't ask me for an explanation.
*/

/* Note: The bootloader (esp-idf bootloader.bin) configures:
*
* - CPU frequency to 80MHz
* - The XTAL frequency according to the SDK config CONFIG_ESP32_XTAL_FREQ,
* which is 40MHz by default.
*
* Reference:
* https://github.com/espressif/esp-idf/blob/6fd855ab8d00d23bad4660216bc2122c2285d5be/components/bootloader_support/src/bootloader_clock.c#L38-L62
*/

#ifdef CONFIG_ESP32CORE_RUN_IRAM
# define BOARD_CLOCK_FREQUENCY (2 * BOARD_XTAL_FREQUENCY)
#else
# define BOARD_CLOCK_FREQUENCY BOARD_XTAL_FREQUENCY
# define BOARD_CLOCK_FREQUENCY 80000000
#endif

#endif /* __BOARDS_XTENSA_ESP32_ESP32_CORE_INCLUDE_BOARD_H */