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各位大佬，小弟初接触H7系列的HAL库，测试串口时，默认波特率采用的115200，收发都正常，后来跟上位机通讯时候要求460800，修改后发现数据就完全不正常了，下面是串口部分代码，请帮忙看看，谢谢！
==================
SystemClock_Config部分
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/* 启用电源配置更新 */
HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
/* 配置主内稳压器输出电压 */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);
while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
/* 初始化CPU、AHB和APB总线时钟 */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 5;
RCC_OscInitStruct.PLL.PLLN = 192;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
while(1);
}
/* 初始化CPU、AHB和APB总线时钟 */
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2
|RCC_CLOCKTYPE_D3PCLK1 | RCC_CLOCKTYPE_D1PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
{
while(1);
}
}
==================================
串口部分：
void USART1_Config(uint32_t baudrate)
{
GPIO_InitTypeDef GPIO_InitStruct;
RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
__HAL_RCC_GPIOA_CLK_ENABLE();
/* 配置串口1时钟源*/
RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
RCC_PeriphClkInit.Usart16ClockSelection = RCC_USART16CLKSOURCE_D2PCLK2;
HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit);
/* 使能串口1时钟 */
__USART1_CLK_ENABLE();
// __HAL_RCC_USART1_CLK_ENABLE();
/* 配置引脚为复用功能 */
GPIO_InitStruct.Pin = GPIO_PIN_9 | GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* 配置 USART 模式 */
USART1_Handle.Instance = USART1;
USART1_Handle.Init.BaudRate = baudrate;
USART1_Handle.Init.WordLength = UART_WORDLENGTH_8B;
USART1_Handle.Init.StopBits = UART_STOPBITS_1;
USART1_Handle.Init.Parity = UART_PARITY_NONE;
USART1_Handle.Init.Mode = UART_MODE_TX_RX;
USART1_Handle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
USART1_Handle.Init.OverSampling = UART_OVERSAMPLING_16;
USART1_Handle.Init.OneBitSampling = UART_ONEBIT_SAMPLING_DISABLED;
USART1_Handle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
HAL_UART_Init(&USART1_Handle);
/* 串口1中断初始化 */
HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART1_IRQn);
__HAL_UART_CLEAR_IDLEFLAG(&USART1_Handle);
/* 开启串口接收中断 */
// __HAL_UART_ENABLE_IT(&USART1_Handle, UART_IT_RXNE);
/* 开启串口空闲中断 */
__HAL_UART_ENABLE_IT(&USART1_Handle, UART_IT_IDLE);
}
=============================
使用空闲中断来接收数据：
void USART1_IRQHandler(void)
{
if(__HAL_UART_GET_IT(&USART1_Handle, UART_IT_RXNE) != RESET){
HAL_UART_Receive(&USART1_Handle, (uint8_t *)&USART1_RxBuffer[USART1_RxCount++], 1, 1000);
__HAL_UART_CLEAR_FLAG(&USART1_Handle, UART_FLAG_RXNE);
}else if(__HAL_UART_GET_IT(&USART1_Handle, UART_IT_IDLE) != RESET){
USART1_RxFlag = true;
__HAL_UART_CLEAR_FLAG(&USART1_Handle, UART_FLAG_IDLE);
}
HAL_UART_IRQHandler(&USART1_Handle);
}
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发表于 2020-8-12 17:21:02
发表于 2020-8-12 18:25:40
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