What I am trying to do:
Send and receive data via USART on my STM32H7B3I-DK. I am connecting a serial USB to the STMod+ CN10 RX and TX and have 2 serial consoles on for monitoring the data that is transmitted on both ends (the serial USB and the discovery board).
What I have done:
I have generated a code with both USART1 and USART2 enabled. (USART1 for outputting the data that goes to the discovery board and USART2 to enable data transfer to the serial USB.) I then added a few lines of code (shown below) in the main loop to send and receive data.
I have also tried switching to USART3 on (CN11) but there is still no data being sent or received. I have also tried connecting to the ESP-01connector (CN4 of STMod+) , which should also be routed to USART2, but the result is the same.
Could someone provide me with some insight? Thank you for your help!
#include "main.h"
#include "stdio.h"
/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart1;
UART_HandleTypeDef huart2;
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void PeriphCommonClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_USART2_UART_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
PeriphCommonClock_Config();
MX_GPIO_Init();
MX_RTC_Init();
MX_USART1_UART_Init();
MX_USART2_UART_Init();
/* USER CODE BEGIN 2 */
//USART_SendData(&huart2,"hi");
uint8_t trans[] = "test"; //Data to send
HAL_UART_Transmit(&huart2,trans,sizeof(trans),500);
uint8_t recv[100]; //Data to send
HAL_UART_Receive(&huart2,recv,sizeof(recv),500);
HAL_UART_Transmit(&huart1,recv,sizeof(recv),500);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief Peripherals Common Clock Configuration
* @retval None
*/
void PeriphCommonClock_Config(void)
{
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
/** Initializes the peripherals clock
*/
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_FMC|RCC_PERIPHCLK_OSPI
|RCC_PERIPHCLK_CKPER;
PeriphClkInitStruct.PLL2.PLL2M = 12;
PeriphClkInitStruct.PLL2.PLL2N = 200;
PeriphClkInitStruct.PLL2.PLL2P = 2;
PeriphClkInitStruct.PLL2.PLL2Q = 2;
PeriphClkInitStruct.PLL2.PLL2R = 4;
PeriphClkInitStruct.PLL2.PLL2RGE = RCC_PLL2VCIRANGE_1;
PeriphClkInitStruct.PLL2.PLL2VCOSEL = RCC_PLL2VCOWIDE;
PeriphClkInitStruct.PLL2.PLL2FRACN = 0;
PeriphClkInitStruct.FmcClockSelection = RCC_FMCCLKSOURCE_PLL2;
PeriphClkInitStruct.OspiClockSelection = RCC_OSPICLKSOURCE_PLL2;
PeriphClkInitStruct.CkperClockSelection = RCC_CLKPSOURCE_HSI;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief USART1 Initialization Function
* @param None
* @retval None
*/
static void MX_USART1_UART_Init(void)
{
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
{
Error_Handler();
}
}
static void MX_USART2_UART_Init(void)
{
huart2.Instance = USART2;
huart2.Init.BaudRate = 115200;
huart2.Init.WordLength = UART_WORDLENGTH_8B;
huart2.Init.StopBits = UART_STOPBITS_1;
huart2.Init.Parity = UART_PARITY_NONE;
huart2.Init.Mode = UART_MODE_TX_RX;
huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart2) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
{
Error_Handler();
}
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOI_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOK_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOJ_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOI, WIFI_BOOT_Pin|WIFI_WKUP_Pin|WIFI_RST_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOG, USER_LED1_Pin|USER_LED2_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(SPI2_NSS_GPIO_Port, SPI2_NSS_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(AUDIO_NRST_GPIO_Port, AUDIO_NRST_Pin, GPIO_PIN_SET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOA, LCD_BL_CTRL_Pin|LCD_ON_OFF_Pin, GPIO_PIN_SET);
/*Configure GPIO pins : WIFI_GPIO_Pin WIFI_DATRDY_Pin */
GPIO_InitStruct.Pin = WIFI_GPIO_Pin|WIFI_DATRDY_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);
/*Configure GPIO pins : SDIO1_D2_Pin SDIO1_CK_Pin SDIO1_D3_Pin SDIO1_D1_Pin
SDIO1_D0_Pin */
GPIO_InitStruct.Pin = SDIO1_D2_Pin|SDIO1_CK_Pin|SDIO1_D3_Pin|SDIO1_D1_Pin
|SDIO1_D0_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_SDMMC1;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*Configure GPIO pins : WIFI_BOOT_Pin WIFI_WKUP_Pin WIFI_RST_Pin */
GPIO_InitStruct.Pin = WIFI_BOOT_Pin|WIFI_WKUP_Pin|WIFI_RST_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);
/*Configure GPIO pins : USER_LED1_Pin AUDIO_NRST_Pin USER_LED2_Pin */
GPIO_InitStruct.Pin = USER_LED1_Pin|AUDIO_NRST_Pin|USER_LED2_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
/*Configure GPIO pin : SDIO1_CMD_Pin */
GPIO_InitStruct.Pin = SDIO1_CMD_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_SDMMC1;
HAL_GPIO_Init(SDIO1_CMD_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : uSD_Detect_Pin */
GPIO_InitStruct.Pin = uSD_Detect_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(uSD_Detect_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pins : SPI2_NSS_Pin LCD_BL_CTRL_Pin LCD_ON_OFF_Pin */
GPIO_InitStruct.Pin = SPI2_NSS_Pin|LCD_BL_CTRL_Pin|LCD_ON_OFF_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*Configure GPIO pin : WAKEUP_Pin */
GPIO_InitStruct.Pin = WAKEUP_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(WAKEUP_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : MCO_Pin */
GPIO_InitStruct.Pin = MCO_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF0_MCO;
HAL_GPIO_Init(MCO_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : LCD_INT_Pin */
GPIO_InitStruct.Pin = LCD_INT_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(LCD_INT_GPIO_Port, &GPIO_InitStruct);
}
Note: I have shortened the code due to posting length limitations. Basically, my full code includes all of the settings STM32CUBEMX recommends turning on when generating a new code with this board with the exception of USART2 also being configured for serial input/output.
