I want to Turn On and OFF LED by Command "LED ON" or "LED OFF". When i write command "LED ON" in the command terminal like Tera Term the LED should be On.
I used here string comparision to compare if the given command is same as "LED ON" or "LED OFF". But i am not getting the expected output. the Led is not turned on or off according to the command rather it gives command invalid.
UART_HandleTypeDef huart2;
char *user_data = "The program is running\r\n";
uint8_t recvd_data;
uint8_t data_buffer[100];
uint32_t count=0;
uint8_t reception_complete = FALSE;
int main(void)
{
MX_GPIO_Init();
MX_USART2_UART_Init();
uint16_t len_of_data = strlen(user_data);
HAL_UART_Transmit(&huart2,(uint8_t*)user_data,len_of_data,HAL_MAX_DELAY);
while(reception_complete != TRUE)
{
HAL_UART_Receive_IT(&huart2,&recvd_data,1);
}
while (1)
{
}
}
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if(recvd_data == '\r')
{
reception_complete = TRUE;
data_buffer[count++]='\r';
//int result1,result2;
char str1[]="LED ON";
char str2[]="LED OFF";
char *error_buffer = "Command is Invalid\r\n";
//result1=strcmp(str1,(char*)data_buffer);
//result2=strcmp(str2,(char*)data_buffer);
if(strcmp(str1,(char*)data_buffer)==0)
{
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5, GPIO_PIN_SET);
}
else if(strcmp(str2,(char*)data_buffer)==0)
{
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_RESET);
}
else
{
HAL_UART_Transmit(huart,(uint8_t*)error_buffer,strlen(error_buffer),HAL_MAX_DELAY);
}
}
else
{
data_buffer[count++] = recvd_data;
}
}
