static int32_t reset(void)
{
uint32_t mcr;
// Reset FIFOs
LPC_USART->FCR = 0x87; //0x06;
baudrate = 0;
dll = 0;
tx_in_progress = 0;
circ_buf_init(&write_buffer, write_buffer_data, sizeof(write_buffer_data));
circ_buf_init(&read_buffer, read_buffer_data, sizeof(read_buffer_data));
// Enable loopback mode to drain remaining bytes (even if flow control is on)
mcr = LPC_USART->MCR;
LPC_USART->MCR = mcr | (1 << 4);
// Ensure a clean start, no data in either TX or RX FIFO
while ((LPC_USART->LSR & ((1 << 5) | (1 << 6))) != ((1 << 5) | (1 << 6))) {
LPC_USART->FCR = 0x87; // (1 << 1) | (1 << 2);
}
// Restore previous mode (loopback off)
LPC_USART->MCR = mcr;
while (LPC_USART->LSR & 0x01) {
LPC_USART->RBR; // Dump data from RX FIFO
}
return 1;
}
static int32_t reset(void)
{
// Reset FIFOs
LPC_USART->FCR = 0x06;
baudrate = 0;
dll = 0;
tx_in_progress = 0;
circ_buf_init(&write_buffer, write_buffer_data, sizeof(write_buffer_data));
circ_buf_init(&read_buffer, read_buffer_data, sizeof(read_buffer_data));
// Ensure a clean start, no data in either TX or RX FIFO
while ((LPC_USART->LSR & ((1 << 5) | (1 << 6))) != ((1 << 5) | (1 << 6)));
while (LPC_USART->LSR & 0x01) {
LPC_USART->RBR; // Dump data from RX FIFO
}
return 1;
}
