Posted on March 17, 2018 at 07:25char receivedData[50]='free';
char transmitData[] = 'done';
GPIO_PinState Val;
GPIO_PinState Led_State;
HAL_UART_Receive(&huart2,(uint8_t *)receivedData,50,50);
Val = HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_13);
Led_State = HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_5);
if(strcmp(receivedData, 'busy') == 0)
{
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);
}
else if(Val == GPIO_PIN_RESET && Led_State == GPIO_PIN_SET)
{
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);
HAL_UART_Transmit(&huart2,(uint8_t *)transmitData,4,50);
}
I am using the above code on the Nucleo Board F070RB when I send busy string via realterm the on-board LED glows, and after the LED has glown when the user pushes the onboard switch, the LED stops glowing and it sends back an acknowledgment to the system in a form of string which says done. Whole system is working fine but the acknowledgment I am getting is the first letter i.e. d only apart from that I get 2 letters which are garbage. The baudrate, parity, stop bit, flow control is all perfect.
Below is my UART initialization:
huart2.Instance = USART2;
huart2.Init.BaudRate = 9600;
huart2.Init.WordLength = UART_WORDLENGTH_7B;
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.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
Below is my GPIO initialization:
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);
/*Configure GPIO pin : PC13 */
GPIO_InitStruct.Pin = GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*Configure GPIO pin : PA5 */
GPIO_InitStruct.Pin = GPIO_PIN_5;
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);
#stm32-nucleo #nucleo-f072rb
