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Async io work

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This commit is contained in:
Mark Qvist 2019-01-08 20:56:58 +01:00
parent 42dcd121cc
commit 06d138d66c
11 changed files with 246 additions and 94 deletions
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15
hardware/Serial.c
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@ -5,6 +5,8 @@
void serial_init(Serial *serial) {
memset(serial, 0, sizeof(*serial));
memset(serialBuf, 0, sizeof(serialBuf));
UBRR0H = UBRRH_VALUE;
UBRR0L = UBRRL_VALUE;
@ -14,13 +16,15 @@ void serial_init(Serial *serial) {
UCSR0A &= ~(_BV(U2X0));
#endif
// Set to 8-bit data, enable RX and TX
// Set to 8-bit data, enable RX and TX, enable receive interrupt
UCSR0C = _BV(UCSZ01) | _BV(UCSZ00);
UCSR0B = _BV(RXEN0) | _BV(TXEN0);
UCSR0B = _BV(RXEN0) | _BV(TXEN0) | _BV(RXCIE0);
FILE uart0_fd = FDEV_SETUP_STREAM(uart0_putchar, uart0_getchar, _FDEV_SETUP_RW);
serial->uart0 = uart0_fd;
fifo_init(&serialFIFO, serialBuf, sizeof(serialBuf));
}
bool serial_available(uint8_t index) {
@ -45,4 +49,11 @@ int uart0_getchar(FILE *stream) {
char uart0_getchar_nowait(void) {
if (!(UCSR0A & _BV(RXC0))) return EOF;
return UDR0;
}
ISR(USART0_RX_vect) {
if (serial_available(0)) {
char c = uart0_getchar_nowait();
fifo_push(&serialFIFO, c);
}
}