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esp32-core: Fix BOARD_CLOCK_FREQUENCY 

Tested on qemu.

I left CONFIG_ESP32CORE_RUN_IRAM case and the "Don't ask me" comment
as it is because I don't understand it or can test it.
This commit is contained in:
YAMAMOTO Takashi 2020-03-02 15:48:20 +09:00 committed by Alin Jerpelea
parent c365e0a88f
commit c0762fe652
1 changed files with 11 additions and 1 deletions
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12
boards/xtensa/esp32/esp32-core/include/board.h
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@ -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 */