/**
* @brief IRQ handler for USART2
*/
void USART2_IRQHandler(void) {
// If transmit buffer empty interrupt
if(USART_GetITStatus(USART2, USART_IT_TXE) != RESET) {
uint8_t c;
if (FIFO_Pop(&txFifo,&c) == 0) { // If buffer not empty
USART_SendData(USART2, c); // Send data
} else {
// Turn off TXE interrupt
USART_ITConfig(USART2, USART_IT_TXE, DISABLE);
}
}
// If RX buffer not empty interrupt
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) {
uint8_t c = USART_ReceiveData(USART2); // Get data from UART
uint8_t res = FIFO_Push(&rxFifo, c); // Put data in RX buffer
// Checking res to ensure no buffer overflow occurred
if ((c == UART2_TERMINATOR) && (res == 0)) {
gotFrame++;
}
}
}
void USART3_PrintBlock(uint8_t* pdata, uint8_t len)
{
uint32_t i = 0;
for(i = 0; i < len; i++)
{
FIFO_Push(usart3_tx_fifo, pdata[i]);
}
USART_ITConfig(USART3, USART_IT_TXE, ENABLE);
}
/**
* @brief Callback for receiving data from PC.
* @param c Data sent from lower layer software.
*/
void COMM_RxCallback(char c) {
uint8_t res = FIFO_Push(&rxFifo, c); // Put data in RX buffer
// Checking res to ensure no buffer overflow occurred
if ((c == COMM_TERMINATOR) && (res == 0)) {
gotFrame++;
}
}
/**
* @brief Send a char to USART2.
* @details This function can be called in stubs.c _write
* function in order for printf to work
*
* @param c Char to send.
*/
void COMM_Putc(uint8_t c) {
// disable IRQ so it doesn't screw up FIFO count - leads to errors in transmission
COMM_HAL_IrqDisable;
FIFO_Push(&txFifo,c); // Put data in TX buffer
COMM_HAL_TxEnable(); // Enable low level transmitter
// enable IRQ again
COMM_HAL_IrqEnable;
}
/**
* @brief Send a char to PC.
* @details This function can be called in stubs.c _write
* function in order for printf to work
*
* @param c Char to send.
*/
void COMM_Putc(char c) {
// disable IRQ so it doesn't screw up FIFO count - leads to errors in transmission
COMM_HAL_IrqDisable();
FIFO_Push(&txFifo,c); // Put data in TX buffer
// enable transmitter if inactive
if (!COMM_HAL_IsTxActive()) {
COMM_HAL_TxEnable();
}
// enable IRQ again
COMM_HAL_IrqEnable();
}
void USART3_Print(uint8_t ch)
{
FIFO_Push(usart3_tx_fifo, ch);
USART_ITConfig(USART3, USART_IT_TXE, ENABLE);
}
/**
* @brief Send a char to USART2.
* @param c Char to send.
*/
void USART2_Putc(uint8_t c) {
FIFO_Push(&txFifo,c); // Put data in TX buffer
USART_ITConfig(USART2, USART_IT_TXE, ENABLE); // Enable transmit buffer empty interrupt
}
