help with ft232rl and discoveryf4

[montagnanigiovanni]

Posted on August 28, 2014 at 14:04

hi everybody, i need to interface my dicovery board with a ft232rl board that i bought from amazon.

i'm running this program i wrote: /* Private variables ---------------------------------------------------------*/ UART_HandleTypeDef huart1; /* USER CODE BEGIN 0 */ void ERROR_HANDLER(); /* USER CODE END 0 */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_USART1_UART_Init(void); int main(void) {   /* USER CODE BEGIN 1 */ char data2send='g';        /* USER CODE END 1 */   /* MCU Configuration----------------------------------------------------------*/   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */   HAL_Init();   /* Configure the system clock */   SystemClock_Config();   /* System interrupt init*/   /* Sets the priority grouping field */   HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_0);   HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);   /* Initialize all configured peripherals */   MX_GPIO_Init();   MX_USART1_UART_Init();   /* USER CODE BEGIN 2 */   HAL_GPIO_WritePin(GPIOD,GPIO_PIN_14,1);     HAL_GPIO_WritePin(GPIOD,GPIO_PIN_12,1);   /* USER CODE END 2 */   /* USER CODE BEGIN 3 */   /* Infinite loop */   while (1)   {   if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0)==1)     {         HAL_GPIO_WritePin(GPIOD,GPIO_PIN_14,0);       HAL_GPIO_WritePin(GPIOD,GPIO_PIN_12,0);         HAL_UART_Transmit(&huart1,(uint8_t*)data2send,1,200);         HAL_Delay(300);         HAL_GPIO_WritePin(GPIOD,GPIO_PIN_14,1);       HAL_GPIO_WritePin(GPIOD,GPIO_PIN_12,1);         if(HAL_UART_Transmit(&huart1,(uint8_t*)data2send,1,200)!= HAL_OK)         {             ERROR_HANDLER();         };              }   }   /* USER CODE END 3 */ } /** System Clock Configuration */ void SystemClock_Config(void) {   RCC_ClkInitTypeDef RCC_ClkInitStruct;   RCC_OscInitTypeDef RCC_OscInitStruct;   __PWR_CLK_ENABLE();   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);   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 = 8;   RCC_OscInitStruct.PLL.PLLN = 336;   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;   RCC_OscInitStruct.PLL.PLLQ = 7;   HAL_RCC_OscConfig(&RCC_OscInitStruct);   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1                               |RCC_CLOCKTYPE_PCLK2;   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;   HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5); } /* USART1 init function */ void MX_USART1_UART_Init(void) {   huart1.Instance = USART1;   huart1.Init.BaudRate = 110;   huart1.Init.WordLength = UART_WORDLENGTH_9B;   huart1.Init.StopBits = UART_STOPBITS_1;   huart1.Init.Parity = UART_PARITY_ODD;   huart1.Init.Mode = UART_MODE_TX;   huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;   huart1.Init.OverSampling = UART_OVERSAMPLING_16;   HAL_UART_Init(&huart1); } /** Configure pins as         * Analog         * Input         * Output         * EVENT_OUT         * EXTI */ void MX_GPIO_Init(void) {   GPIO_InitTypeDef GPIO_InitStruct;   /* GPIO Ports Clock Enable */   __GPIOH_CLK_ENABLE();   __GPIOA_CLK_ENABLE();   __GPIOD_CLK_ENABLE();   /*Configure GPIO pin : PA0 */   GPIO_InitStruct.Pin = GPIO_PIN_0;   GPIO_InitStruct.Mode = GPIO_MODE_INPUT;   GPIO_InitStruct.Pull = GPIO_NOPULL;   HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);   /*Configure GPIO pins : PD12 PD13 PD14 */   GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14;   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;   GPIO_InitStruct.Pull = GPIO_NOPULL;   GPIO_InitStruct.Speed = GPIO_SPEED_LOW;   HAL_GPIO_Init(GPIOD, &GPIO_InitStruct); } /* USER CODE BEGIN 4 */ void ERROR_HANDLER() {     while(1)     {     HAL_Delay(50);         HAL_GPIO_TogglePin(GPIOD,GPIO_PIN_14);       HAL_GPIO_TogglePin(GPIOD,GPIO_PIN_12);     } } and i correctly see the tx led blinking two times every time i push my blue button. why i receive with real term only zeros? do you think is a hardware problem? thank you so much for your help Giovanni

[montagnanigiovanni]

Posted on August 29, 2014 at 15:21

hi, i've changed usart (now i'm using usart6), now i see some bits arriving in real term.

they are not what i would like to send, but better something than nothing! may someone help me founding what i did wrong? it is because i'm using the uart library instead of the usart one? it is correct how cubemx has set my port? void MX_USART6_UART_Init(void) {   huart6.Instance = USART6;   huart6.Init.BaudRate = 115200;   huart6.Init.WordLength = UART_WORDLENGTH_8B;   huart6.Init.StopBits = UART_STOPBITS_1;   huart6.Init.Parity = UART_PARITY_NONE;   huart6.Init.Mode = UART_MODE_TX_RX;   huart6.Init.HwFlowCtl = UART_HWCONTROL_NONE;   huart6.Init.OverSampling = UART_OVERSAMPLING_16;   HAL_UART_Init(&huart6); and how i use the library? HAL_UART_Transmit(&huart6,(uint8_t*)data2send,1,200); thank you. Giovanni