int main(void)
{
RCC_Configuration();
GPIO_Configuration();
USART1_Configuration();
LED_Initialization();
USART1_puts("Hello World!\r\n");
USART1_puts("Just for STM32F429I Discovery verify USART1 with USB TTL Cable\r\n");
while(1)
{
//LED3_Toggle();
//Recieve
if(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) != RESET){ // == SET
char t = USART_ReceiveData(USART1);
if(t == 'a') LED3_Toggle();
else if(t == 'b') LED4_Toggle();
//Transmitt
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
USART_SendData(USART1, t);
}
}
while(1); // Don't want to exit
}
void USART1_IRQHandler(void)
{
if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) { //==SET
uart1_data = USART_ReceiveData(USART1);
if(i == '0'){
if (uart1_data =='a') i = uart1_data;
else if(uart1_data =='d') i = uart1_data;
else i = '0';
}
else if(i == 'a'){
i = (uart1_data =='b') ? uart1_data : '0';
}
else if(i == 'b'){
i = (uart1_data =='c') ? uart1_data : '0';
}
else if(i == 'c'){
if (uart1_data =='3') i = uart1_data;
else if(uart1_data =='4') i = uart1_data;
else i = '0';
}
else if(i == '3'){
if(uart1_data =='o') LED3_On();
else if(uart1_data =='f') LED3_Off();
i = '0';
}
else if(i == '4'){
if(uart1_data =='o') LED4_On();
else if(uart1_data =='f') LED4_Off();
i = '0';
}
else if(i == 'd'){
i = (uart1_data =='e') ? uart1_data : '0';
}
else if(i == 'e'){
i = (uart1_data =='f') ? uart1_data : '0';
}
else if(i == 'f'){
if(uart1_data =='3') LED3_Toggle();
else if(uart1_data =='4') LED4_Toggle();
i = '0';
}
USART_SendData(USART1, i);
}
}
void USART1_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
/* USARTx configuration ------------------------------------------------------*/
/* USARTx configured as follow:
* - BaudRate = 57600 baud
* - Word Length = 8 Bits
* - One Stop Bit
* - No parity
* - Hardware flow control disabled (RTS and CTS signals)
* - Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = 57600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
USART_ClearFlag(USART1, USART_FLAG_TC);
USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
/* NVIC Initialization */
NVIC_InitTypeDef NVIC_InitStruct = {
.NVIC_IRQChannel = USART1_IRQn,
.NVIC_IRQChannelPreemptionPriority = 0,
.NVIC_IRQChannelSubPriority = 0,
.NVIC_IRQChannelCmd = ENABLE
};
NVIC_Init(&NVIC_InitStruct);
}
void USART1_puts(char* s)
{
while(*s) {
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
USART_SendData(USART1, *s);
s++;
}
}
/**************************************************************************************/
int main(void)
{
RCC_Configuration();
GPIO_Configuration();
USART1_Configuration();
LED_Initialization();
USART1_puts("Hello World!\r\n");
USART1_puts("Just for STM32F429I Discovery verify USART1 with USB TTL Cable\r\n");
while(1)
{
LED3_Toggle();
Delay_1us(10000);
}
}
