twr_module_rs485.h

#ifndef _TWR_MODULE_RS485_H
#define _TWR_MODULE_RS485_H

#include "twr_tick.h"
#include "twr_sc16is740.h"
#include "twr_scheduler.h"
#include "twr_fifo.h"



typedef enum
{
    TWR_MODULE_RS485_EVENT_ERROR = 0,

    TWR_MODULE_RS485_EVENT_VOLTAGE = 1,

    TWR_MODULE_RS485_EVENT_ASYNC_WRITE_DONE = 2,

    TWR_MODULE_RS485_EVENT_ASYNC_READ_DATA = 2,

    TWR_MODULE_RS485_EVENT_ASYNC_READ_TIMEOUT = 3

} twr_module_rs485_event_t;


typedef enum
{
    TWR_MODULE_RS485_BAUDRATE_9600 = TWR_SC16IS740_BAUDRATE_9600,
    TWR_MODULE_RS485_BAUDRATE_19200 = TWR_SC16IS740_BAUDRATE_19200,
    TWR_MODULE_RS485_BAUDRATE_38400 = TWR_SC16IS740_BAUDRATE_38400,
    TWR_MODULE_RS485_BAUDRATE_57600 = TWR_SC16IS740_BAUDRATE_57600,
    TWR_MODULE_RS485_BAUDRATE_115200 = TWR_SC16IS740_BAUDRATE_115200

} twr_module_rs485_baudrate_t;


bool twr_module_rs485_init(void);


bool twr_module_rs485_deinit(void);


bool twr_module_rs485_measure(void);


bool twr_module_rs485_get_voltage(float *volt);


void twr_module_rs485_set_event_handler(void (*event_handler)(twr_module_rs485_event_t, void *), void *event_param);


void twr_module_rs485_set_update_interval(twr_tick_t interval);


size_t twr_module_rs485_write(uint8_t *buffer, size_t length);


bool twr_module_rs485_available(size_t *available);


size_t twr_module_rs485_read(uint8_t *buffer, size_t length, twr_tick_t timeout);


bool twr_module_rs485_set_baudrate(twr_module_rs485_baudrate_t baudrate);


void twr_module_rs485_set_async_fifo(twr_fifo_t *write_fifo, twr_fifo_t *read_fifo);


size_t twr_module_rs485_async_write(uint8_t *buffer, size_t length);


bool twr_module_rs485_async_read_start(twr_tick_t timeout);


bool twr_module_rs485_async_read_stop(void);


size_t twr_module_rs485_async_read(void *buffer, size_t length);


#endif