UART 1 transmit but the receive data in terminal not same

ismimusyafani · ‎2015-09-30

Posted on October 01, 2015 at 04:52

void UART1_Config(int baudrate){

__USART1_CLK_ENABLE();

/*---------------GPIO-----------------*/

GPIO_InitStruct.Pin = (GPIO_PIN_6 | GPIO_PIN_7);

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_PULLUP;

GPIO_InitStruct.Speed = GPIO_SPEED_LOW;

GPIO_InitStruct.Alternate = GPIO_AF7_USART1;

HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

/*---------------GPIO-----------------*/

/*♯♯-1- Configure the UART peripheral ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/

/* Put the USART peripheral in the Asynchronous mode (UART Mode) */

/* UART1 configured as follow:

- Word Length = 8 Bits

- Stop Bit = One Stop bit

- Parity = ODD parity

- BaudRate = 9600 baud

- Hardware flow control disabled (RTS and CTS signals) */

UartHandle.Instance = USART1; //enable uart clock

UartHandle.Init.BaudRate = baudrate;

UartHandle.Init.WordLength = UART_WORDLENGTH_8B;

UartHandle.Init.StopBits = UART_STOPBITS_1;

UartHandle.Init.Parity = UART_PARITY_NONE;

UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;

UartHandle.Init.Mode = UART_MODE_TX_RX;

UartHandle.Init.OverSampling = UART_OVERSAMPLING_16;

HAL_UART_Init(&UartHandle);

}

and this is my function to send data .

void SendByte1(unsigned char a) {

while ((USART1->SR & USART_SR_TXE) == 0);

USART1 -> DR = a ;

while ((USART1->SR & USART_SR_TXE) == 0);

}

why, if i SendData1(0xFF), in the hyperterminal will receive F0 and always different with thw transmit data.

#stm32halusart

Amel NASRI · ‎2015-10-01

Posted on October 01, 2015 at 10:29

Hi musyafani,

Did you tried using the HAL function: HAL_UART_Transmit? What do you get as result in this case?

-Mayla-

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ismimusyafani · ‎2015-10-01

Posted on October 01, 2015 at 19:37

can you show me how to use the hal function with HAL_Uart_Transmit();

Amel NASRI · ‎2015-10-07

Posted on October 07, 2015 at 13:49

Hi musyafani

Have a look to any UART example available in STM32CubeF4 (I don't know which parts are you using exactly).

There are ones under STM32Cube_FW_F4_V1.8.0\Projects\STM32F4-Discovery\Examples\UART.

-Mayla-

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.