Closed sunnyguhz closed 1 year ago
What are your changes in generic_clock.c?
Hi @sunnyguhz I've made some tests and can confirm the PWM frequency is not correct. After some investigation, it is due to a hardware issue with STM32G0xx series. Looking at the errata sheet: https://www.st.com/resource/en/errata_sheet/es0486-stm32g030x6x8-device-errata-stmicroelectronics.pdf
PB9 is linked to TIM17_CH1, that's why you get this result. Using another pins not linked to TIM16 or TIM17 will work. Unfortunately, I will not be able to provide a fix for this.
Okay. However, it's still working.
I changed some like this in generic_clock.c It is working in 4M now.
#if defined(ARDUINO_GENERIC_G030C6TX) || defined(ARDUINO_GENERIC_G030C8TX)
#include "pins_arduino.h"
/**
* @brief System Clock Configuration
* @param None
* @retval None
*/
WEAK void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {};
/* Configure the main internal regulator output voltage */
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE2);
/*
* Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV4;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_OFF;
//RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
//RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
//RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
//RCC_OscInitStruct.PLL.PLLN = 2;
//RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
//RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
Error_Handler();
}
/* Initializes the CPU, AHB and APB buses clocks */
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
Error_Handler();
}
}
#endif /* ARDUINO_GENERIC_* */
Yes it works because SYSCLK is equal to PCLK:
Describe the bug I find a bug with STM32G030 series. The frequency of PWM is 1.5 times, when I changed "generic_clock.c" to set SysClockFreq below 16M. I used STM32G030C8T6 and STM32G030K6T6, all them has this problem.
To Reproduce
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