synth/uart/uart.h

#pragma once

#define UART_STATUS_RXNE_pos 1
#define UART_STATUS_RXNE_msk (1 << UART_STATUS_RXNE_pos)
#define UART_STATUS_TXE_pos  0
#define UART_STATUS_TXE_msk  (1 << UART_STATUS_TXE_pos)

struct uart {
  volatile uint8_t data;
  volatile uint16_t flags;
};

int uart_rx_available(struct uart* uart);
int uart_tx_available(struct uart* uart);
void uart_write(struct uart* uart, const char c);
char uart_read(struct uart* uart);