soft_uart.h

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/*
 * Copyright (C) 2020 ML!PA Consulting GmbH
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
#include "periph/gpio.h"
#include "periph/uart.h"
#include "periph/timer.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define SOFT_UART_FLAG_INVERT_TX    0x1

#define SOFT_UART_FLAG_INVERT_RX    0x2

typedef struct {
    gpio_t rx_pin;          
    gpio_t tx_pin;          
    tim_t rx_timer;         
    tim_t tx_timer;         
    uint32_t timer_freq;    
    uint8_t flags;          
} soft_uart_conf_t;

typedef unsigned soft_uart_t;

int soft_uart_init(soft_uart_t uart, uint32_t baudrate, uart_rx_cb_t rx_cb, void *arg);

int soft_uart_mode(soft_uart_t uart, uart_data_bits_t data_bits, uart_parity_t parity,
                   uart_stop_bits_t stop_bits);

void soft_uart_write(soft_uart_t uart, const uint8_t *data, size_t len);

void soft_uart_poweron(soft_uart_t uart);

void soft_uart_poweroff(soft_uart_t uart);
 
#ifdef __cplusplus
}
#endif