Function uart_irq

modules/io/serial/pico/serial.c:359–416

}

void uart_irq()
{
	Serial serial;
	uint8_t post = 0;
	int i;

	for (i=0; i<2; i++) {
		serial = uart_in_use[i];
		if (!serial)
			continue;
		uart_set_irq_enables(serial->uart, false, false);
		while (uart_is_writable(serial->uart) && (0 != fifo_length(&serial->tx_fifo))) {
			uint8_t c;
			if (0 == fifo_get(&serial->tx_fifo, &c))
				uart_write_blocking(serial->uart, &c, 1);
			else
				break;
		}

		serial->txInterruptEnabled = false;
		if (!fifo_full(&serial->tx_fifo)) {
			if (serial->onWritable) {
				post |= (0 == serial->isWritable);
				serial->isWritable = 1;
			}
		}
		if (0 != fifo_length(&serial->tx_fifo))
			serial->txInterruptEnabled = true;

		while (uart_is_readable(serial->uart) && !fifo_full(&serial->rx_fifo)) {
			uint8_t c = uart_getc(serial->uart);
			fifo_put(&serial->rx_fifo, c);
		}

		if (0 == (FIFO_SIZE - fifo_length(&serial->rx_fifo)))
			serial->rxInterruptEnabled = false;
		else if (serial->onReadable) {
			post |= (0 == serial->isReadable);
			serial->isReadable = 1;
		}

		if (post) {
//			__atomic_add_fetch(&serial->useCount, 1, __ATOMIC_SEQ_CST);
			serial->useCount += 1;
			if (!serial->msgOut) {
				serial->msgOut++;
				modMessagePostToMachineFromISR(serial->the, serialDeliver, serial);
			}
		}
	}

	for (i=0; i<2; i++) {
		serial = uart_in_use[i];
		if (!serial)
			continue;
		uart_set_irq_enables(serial->uart, serial->rxInterruptEnabled, serial->txInterruptEnabled);
	}
}