diff options
| author | Damien George <damien.p.george@gmail.com> | 2020-01-30 16:29:45 +1100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2020-01-30 16:29:45 +1100 |
| commit | 29b84ea79856e8ba512ef7ea70b265e9d86e45b6 (patch) | |
| tree | 94aea6ee657054cad322e6d1cfe21f31ad13eb39 /ports/stm32/powerctrl.c | |
| parent | c96a2f636b48b065e8404af6d67fbae5986fd34a (diff) | |
stm32/powerctrl: Disable HSI if not needed to save a bit of power.
Diffstat (limited to 'ports/stm32/powerctrl.c')
| -rw-r--r-- | ports/stm32/powerctrl.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/ports/stm32/powerctrl.c b/ports/stm32/powerctrl.c index 1d1792c38..d1ac85f0e 100644 --- a/ports/stm32/powerctrl.c +++ b/ports/stm32/powerctrl.c @@ -44,6 +44,13 @@ extern uint32_t _estack[]; #define BL_STATE ((uint32_t*)&_estack) +static inline void powerctrl_disable_hsi_if_unused(void) { + #if !MICROPY_HW_CLK_USE_HSI && (defined(STM32F4) || defined(STM32F7) || defined(STM32H7)) + // Disable HSI if it's not used to save a little bit of power + __HAL_RCC_HSI_DISABLE(); + #endif +} + NORETURN void powerctrl_mcu_reset(void) { BL_STATE[1] = 1; // invalidate bootloader address #if __DCACHE_PRESENT == 1 @@ -155,6 +162,8 @@ int powerctrl_rcc_clock_config_pll(RCC_ClkInitTypeDef *rcc_init, uint32_t sysclk return -MP_EIO; } + powerctrl_disable_hsi_if_unused(); + return 0; } @@ -390,6 +399,8 @@ void powerctrl_enter_stop_mode(void) { } #endif + powerctrl_disable_hsi_if_unused(); + #if defined(STM32F7) if (RCC->DCKCFGR2 & RCC_DCKCFGR2_CK48MSEL) { // Enable PLLSAI if it is selected as 48MHz source |