Solved
UART output is garbled on Tera Term
I ran the example project and successfully displayed “Hello World” on Tera Term.
Then I tried to port this project into my own one.
However, the result was garbled characters in the terminal.
The baud rate (115200) and PLL/clock configuration are the same as in the working example.
Do you have any idea what might cause the characters to be corrupted?
/**
******************************************************************************
* @file DCMI/DCMI_CaptureMode/Src/main.c
* @author MCD Application Team
* @brief This example describes how to configure the camera in continuous mode.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private Includes -----------------------------------------------------------*/
#include "stm32f4xx_hal.h"
#include <string.h>
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup DCMI_CaptureMode
* @{
*/
/* Private typedef -----------------------------------------------------------*/
TIM_HandleTypeDef htim1;
UART_HandleTypeDef huart1;
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PV */
const char msg[] = "Hello World\r\n";
/* USER CODE END PV */
/* Private variables ---------------------------------------------------------*/
static DMA2D_HandleTypeDef hdma2d_eval;
/* Private function prototypes -----------------------------------------------*/
static void SystemClock_Config(void);
static void Error_Handler(void);
static void LCD_LL_ConvertLineToARGB8888(void *pSrc, void *pDst);
static void MX_USART1_UART_Init(void);
void Start_XCLK(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @PAram None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 and LED4 */
BSP_LED_Init(LED3);
BSP_LED_Init(LED4);
/* UART初期化*/
MX_USART1_UART_Init();
MX_TIM1_Init(); //PA8設定
Start_XCLK(); //PWM
/*##-1- Disable SAI1_SDA signal ############################################*/
/* Note: In STM324X9I-EVAL RevB, PE6 pin is shared between data_7 of camera
and SAI1_SDA of codec WM8994, after power on, SAI1_SDA pin of codec WM8994
is in output state, thus preventing MCU from Receiving correct signal
from camera, so we need to configure SAI1_SDA pin of codec WM8994
in tri-state
*/
/*##-2- Initialize the LCD #################################################*/
BSP_LCD_Init();
/*##-3- Initialize the LCD Layer ###########################################*/
BSP_LCD_LayerDefaultInit(1, LCD_FRAME_BUFFER);
/* Enable the LCD */
BSP_LCD_DisplayOn();
/* Select the LCD Foreground layer */
BSP_LCD_SelectLayer(1);
/*##-4- Camera Initialization and start capture ############################*/
/* Initialize the Camera */
//BSP_CAMERA_Init(RESOLUTION_R480x272);
/* Start the Camera Capture */
//BSP_CAMERA_ContinuousStart((uint8_t *)CAMERA_FRAME_BUFFER);
printf("UART test start\r\n");
/* Infinite loop */
while (1)
{
HAL_UART_Transmit(&huart1, (uint8_t*)msg, sizeof(msg)-1, HAL_MAX_DELAY);
HAL_Delay(100);
}
}
/**
* @brief Camera line event callback
* @PAram None
* @retval None
*/
void BSP_CAMERA_LineEventCallback(void)
{
static uint32_t tmp, tmp2, counter;
if(BSP_LCD_GetYSize() > counter)
{
LCD_LL_ConvertLineToARGB8888((uint32_t *)(CAMERA_FRAME_BUFFER + tmp), (uint32_t *)(LCD_FRAME_BUFFER + tmp2));
tmp = tmp + BSP_LCD_GetXSize()*sizeof(uint16_t);
tmp2 = tmp2 + BSP_LCD_GetXSize()*sizeof(uint32_t);
counter++;
}
else
{
tmp = 0;
tmp2 = 0;
counter = 0;
}
}
/**
* @brief Converts a line to an ARGB8888 pixel format.
* @PAram pSrc: Pointer to source buffer
* @PAram pDst: Output color
* @PAram xSize: Buffer width
* @PAram ColorMode: Input color mode
* @retval None
*/
void HAL_UART_MspInit(UART_HandleTypeDef* huart)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(huart->Instance==USART1)
{
/* USER CODE BEGIN USART1_MspInit 0 */
/* USER CODE END USART1_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_USART1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**USART1 GPIO Configuration
PA9 ------> USART1_TX
PA10 ------> USART1_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_9 | GPIO_PIN_10; // TX=PA9, RX=PA10
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE BEGIN USART1_MspInit 1 */
/* USER CODE END USART1_MspInit 1 */
}
}
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;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
}
static void LCD_LL_ConvertLineToARGB8888(void *pSrc, void *pDst)
{
/* Enable DMA2D clock */
__HAL_RCC_DMA2D_CLK_ENABLE();
/* Configure the DMA2D Mode, Color Mode and output offset */
hdma2d_eval.Init.Mode = DMA2D_M2M_PFC;
hdma2d_eval.Init.ColorMode = DMA2D_ARGB8888;
hdma2d_eval.Init.OutputOffset = 0;
/* Foreground Configuration */
hdma2d_eval.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
hdma2d_eval.LayerCfg[1].InputAlpha = 0xFF;
hdma2d_eval.LayerCfg[1].InputColorMode = DMA2D_INPUT_RGB565;
hdma2d_eval.LayerCfg[1].InputOffset = 0;
hdma2d_eval.Instance = DMA2D;
/* DMA2D Initialization */
if(HAL_DMA2D_Init(&hdma2d_eval) == HAL_OK)
{
if(HAL_DMA2D_ConfigLayer(&hdma2d_eval, 1) == HAL_OK)
{
if (HAL_DMA2D_Start(&hdma2d_eval, (uint32_t)pSrc, (uint32_t)pDst, BSP_LCD_GetXSize(), 1) == HAL_OK)
{
/* Polling For DMA transfer */
HAL_DMA2D_PollForTransfer(&hdma2d_eval, 10);
}
}
}
else
{
/* FatFs Initialization Error */
Error_Handler();
}
}
/**
* @brief This function is executed in case of error occurrence.
* @PAram None
* @retval None
*/
/* ========== Error_Handler ========== */
static void Error_Handler(void)
{
BSP_LED_On(LED4);
while (1) {}
}
/* ========== printfをUARTにリダイレクト（任意） ========== */
int _write(int file, char *ptr, int len)
{
HAL_UART_Transmit(&huart1, (uint8_t *)ptr, len, HAL_MAX_DELAY);
return len;
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE)
* SYSCLK(Hz) = 180[MHz]
* HCLK(Hz) = 180[MHz]
* AHB Prescaler = 1
* APB1 Prescaler = 4
* APB2 Prescaler = 2
* HSE Frequency(Hz) = 8[MHz]
* PLL_M = 8
* PLL_N = 360
* PLL_P = 2
* PLL_Q = 7
* VDD(V) = 3.3
* Main regulator output voltage = Scale1 mode
* Flash Latency(WS) = 5
* @PAram None
* @retval None
*/
/**
* Duty=Pulse/(Period+1)
* fPWM=fTIM/(Prescaler+1)(Period+1)
*/
void MX_TIM1_Init(void)
{
__HAL_RCC_TIM1_CLK_ENABLE(); //TIM1クロックON
htim1.Instance = TIM1;
htim1.Init.Prescaler = 0; //Prescaler=0
htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
htim1.Init.Period = 7; //Period=7,fPWM=22.5[MHz]
htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim1.Init.RepetitionCounter = 0;
HAL_TIM_PWM_Init(&htim1);
TIM_OC_InitTypeDef sConfigOC = {0};
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 4; //Pulse=4,PWM=50[%]
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1);
// GPIO設定：PA8をTIM1_CH1として出力
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct = {0};
GPIO_InitStruct.Pin = GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
void Start_XCLK(void)
{
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1); //PWM出力開始
}
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
/* Enable Power Control clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* The voltage scaling allows optimizing the power consumption when the device is
clocked below the maximum system frequency, to update the voltage scaling value
regarding system frequency refer to product datasheet. */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/* Enable HSE Oscillator and activate PLL with HSE as source */
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 = 4;
RCC_OscInitStruct.PLL.PLLN = 72;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 3;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
/* Activate the Over-Drive mode */
HAL_PWREx_EnableOverDrive();
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK
| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @PAram file: pointer to the source file name
* @PAram line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
Fig.1 Display result
Fig.2 PLL configuration
Fig.3 Baud rate (115200) on Teraterm
Fig.4 Baundrate on project