cx-chlcd/sources/hd44780_decoder.c

#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>

#include <cx/chlcd.h>
#include <cx/chlcd/__helper.h>


static inline chlcd_error_t __chlcd_hd44780_decoder_init(
    void *connector,
    chlcd_sender_t sender
) {
    if (sender(connector, 0b0010, true, true) != CHLCD_SUCCESS) {
        return CHLCD_SEND_ERROR;
    }

    if (sender(connector, 0b00001111, true, false) != CHLCD_SUCCESS) {
        return CHLCD_SEND_ERROR;
    }

    return CHLCD_SUCCESS;
}

static inline chlcd_error_t __chlcd_hd44780_decoder_clear(
    void *connector,
    chlcd_sender_t sender
) {
    if (sender(connector, 0b00000001, true, false) != CHLCD_SUCCESS) {
        return CHLCD_SEND_ERROR;
    }
    
    if (sender(connector, 0b00000010, true, false) != CHLCD_SUCCESS) {
        return CHLCD_SEND_ERROR;
    }

    return CHLCD_SUCCESS;
}

static inline chlcd_error_t __chlcd_hd44780_decoder_send_char(
    void *connector,
    chlcd_sender_t sender,
    chlcd_data_t content
) {
    return sender(connector, content, false, false);
}

chlcd_error_t chlcd_hd44780_decoder(
    chlcd_command_t command,
    chlcd_data_t content,
    void *connector,
    chlcd_sender_t sender
) {
    switch (command) {
        case CHLCD_INIT:
            return __chlcd_hd44780_decoder_init(connector, sender);

        case CHLCD_CLEAR:
            return __chlcd_hd44780_decoder_clear(connector, sender);

        case CHLCD_SEND_CHAR:
            return __chlcd_hd44780_decoder_send_char(
                connector, 
                sender, 
                content
            ); 

        default:
            return CHLCD_BAD_ARGUMENT;
    }
}