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deep sleep: fix regression due to moving ets_update_cpu_frequency into IRAM

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Deep sleep stub may call ets_update_cpu_frequency, which has been moved from ROM to IRAM.
Restore the ROM version in the linker script, call it ets_update_cpu_frequency_rom, use it in the deep sleep stub.
This commit is contained in:
Ivan Grokhotkov
2017-01-11 17:17:13 +08:00
parent d3a0580bef
commit e4811216ff
3 changed files with 14 additions and 2 deletions
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12
components/esp32/include/rom/ets_sys.h
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@@ -383,6 +383,18 @@ void ets_delay_us(uint32_t us);
*/
void ets_update_cpu_frequency(uint32_t ticks_per_us);
/**
* @brief Set the real CPU ticks per us to the ets, so that ets_delay_us will be accurate.
*
* @note This function only sets the tick rate for the current CPU. It is located in ROM,
* so the deep sleep stub can use it even if IRAM is not initialized yet.
*
* @param uint32_t ticks_per_us : CPU ticks per us.
*
* @return None
*/
void ets_update_cpu_frequency_rom(uint32_t ticks_per_us);
/**
* @brief Get the real CPU ticks per us to the ets.
* This function do not return real CPU ticks per us, just the record in ets. It can be used to check with the real CPU frequency.