#include "epd_cfg.h"

void GPIO_Config(void) {
    pinMode(EPD_BUSY_PIN,  INPUT);
    pinMode(EPD_RST_PIN, OUTPUT);
    pinMode(EPD_DC_PIN, OUTPUT);

    pinMode(EPD_SCK_PIN, OUTPUT);
    pinMode(EPD_MOSI_PIN, OUTPUT);
    pinMode(EPD_CS_PIN, OUTPUT);

    digitalWrite(EPD_CS_PIN, HIGH);
    digitalWrite(EPD_SCK_PIN, LOW);
}
/******************************************************************************
function:  Module Initialize, the BCM2835 library and initialize the pins, SPI protocol
parameter:
Info:
******************************************************************************/
uint8_t DEV_Module_Init(void) {
    GPIO_Config();

#ifdef USE_DEBUG
    Serial.begin(115200);
#endif

    return 0;
}

/******************************************************************************
function:
      SPI read and write
******************************************************************************/
void DEV_SPI_WriteByte(uint8_t data) {
    digitalWrite(EPD_CS_PIN, GPIO_PIN_RESET);

    for (int i = 0; i < 8; i++) {
        if ((data & 0x80) == 0) digitalWrite(EPD_MOSI_PIN, GPIO_PIN_RESET);
        else                    digitalWrite(EPD_MOSI_PIN, GPIO_PIN_SET);

        data <<= 1;
        digitalWrite(EPD_SCK_PIN, GPIO_PIN_SET);
        digitalWrite(EPD_SCK_PIN, GPIO_PIN_RESET);
    }
    digitalWrite(EPD_CS_PIN, GPIO_PIN_SET);
}