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stm32: Support more stm32g4 variants.

Browse Source 
- `timer.c`
  - `TIM_ENTRY(7, ...)` sets IRQ based on specific STM32G4 part
- `system_stm32.c`
  - Support parts without external clock
- `boards/NUCLEO_G474RE/mpconfigboard.h`
  - Explicitly enable `MICROPY_HW_RTC_USE_LSE`

Signed-off-by: Thomas Propst <tom.propst@gmail.com>
This commit is contained in:
Thomas Propst 2026-02-21 12:19:25 -07:00 committed by Damien George
parent d278d6b3d8
commit 43cfbbb779
3 changed files with 17 additions and 3 deletions
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3
ports/stm32/boards/NUCLEO_G474RE/mpconfigboard.h
View File

@ -16,6 +16,9 @@
#define MICROPY_HW_CLK_PLLQ (8)
#define MICROPY_HW_CLK_PLLR (2)
// The board has a 32.768 kHz LSE, solder bridge selectable, on by default
#define MICROPY_HW_RTC_USE_LSE (1)
#define MICROPY_HW_CLK_USE_HSI48 (1) // for RNG
// 4 wait states

15
ports/stm32/system_stm32.c
View File

@ -537,15 +537,26 @@ MP_WEAK void SystemClock_Config(void) {
MICROPY_BOARD_FATAL_ERROR("HAL_RCC_ClockConfig");
}
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC | RCC_PERIPHCLK_LPUART1
| RCC_PERIPHCLK_RNG | RCC_PERIPHCLK_ADC12 | RCC_PERIPHCLK_ADC345
| RCC_PERIPHCLK_RNG | RCC_PERIPHCLK_ADC12
| RCC_PERIPHCLK_FDCAN | RCC_PERIPHCLK_USB;
#if defined(RCC_PERIPHCLK_ADC345)
PeriphClkInitStruct.PeriphClockSelection |= RCC_PERIPHCLK_ADC345;
PeriphClkInitStruct.Adc345ClockSelection = RCC_ADC345CLKSOURCE_SYSCLK;
#endif
PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
PeriphClkInitStruct.Lpuart1ClockSelection = RCC_LPUART1CLKSOURCE_PCLK1;
#if MICROPY_HW_CLK_USE_HSI
PeriphClkInitStruct.FdcanClockSelection = RCC_FDCANCLKSOURCE_PCLK1;
#else
PeriphClkInitStruct.FdcanClockSelection = RCC_FDCANCLKSOURCE_HSE;
#endif
PeriphClkInitStruct.RngClockSelection = RCC_RNGCLKSOURCE_HSI48;
PeriphClkInitStruct.Adc12ClockSelection = RCC_ADC12CLKSOURCE_SYSCLK;
PeriphClkInitStruct.Adc345ClockSelection = RCC_ADC345CLKSOURCE_SYSCLK;
#if MICROPY_HW_RTC_USE_LSE
PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
#else
PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
#endif
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) {
MICROPY_BOARD_FATAL_ERROR("HAL_RCCEx_PeriphCLKConfig");
}

2
ports/stm32/timer.c
View File

@ -903,7 +903,7 @@ static const uint32_t tim_instance_table[MICROPY_HW_MAX_TIMER] = {
#if defined(TIM7)
#if defined(STM32G0)
TIM_ENTRY(7, TIM7_LPTIM2_IRQn),
#elif defined(STM32G4)
#elif defined(STM32G473xx) || defined(STM32G474xx) || defined(STM32G483xx) || defined(STM32G484xx)
TIM_ENTRY(7, TIM7_DAC_IRQn),
#else
TIM_ENTRY(7, TIM7_IRQn),