/*****************************************************************************
* | File      	:   DEV_Config.c
* | Author      :   Waveshare team
* | Function    :   Hardware underlying interface
* | Info        :
*----------------
* |	This version:   V3.0
* | Date        :   2019-06-20
* | Info        :
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documnetation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to  whom the Software is
# furished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
******************************************************************************/
#include "DEV_Config.h"

#ifdef USE_BCM2835_LIB
    #include <bcm2835.h>
#elif USE_WIRINGPI_LIB
    #include <wiringPi.h>
    #include <wiringPiSPI.h>
#endif

/**
 * GPIO read and write
**/

void DEV_Digital_Write(UWORD Pin, UBYTE Value)
{
#ifdef USE_BCM2835_LIB
    bcm2835_gpio_write(Pin, Value);
#elif USE_WIRINGPI_LIB
    digitalWrite(Pin, Value);
#endif
}

UBYTE DEV_Digital_Read(UWORD Pin)
{
    UBYTE Read_value = 0;
#ifdef USE_BCM2835_LIB
    Read_value = bcm2835_gpio_lev(Pin);
#elif USE_WIRINGPI_LIB
    Read_value = digitalRead(Pin);
#endif
    return Read_value;
}

/**
 * SPI
**/
void DEV_SPI_WriteByte(UBYTE Value)
{
#ifdef USE_BCM2835_LIB
    bcm2835_spi_transfer(Value);
#elif USE_WIRINGPI_LIB
    wiringPiSPIDataRW(0,&Value,1);
#endif
}

/**
 * delay x ms
**/
void DEV_Delay_ms(UDOUBLE xms)
{
#ifdef USE_BCM2835_LIB
    bcm2835_delay(xms);
#elif USE_WIRINGPI_LIB
    delay(xms);
#endif
}

/******************************************************************************
function:	Module Initialize, the BCM2835 library and initialize the pins, SPI protocol
parameter:
Info:
******************************************************************************/
UBYTE DEV_Module_Init(void)
{
#ifdef USE_BCM2835_LIB
    if(!bcm2835_init()) {
        printf("bcm2835 init failed  !!! \r\n");
        return 1;
    } else {
        printf("bcm2835 init success !!! \r\n");
    }

    // GPIO Config
    bcm2835_gpio_fsel(EPD_RST_PIN, BCM2835_GPIO_FSEL_OUTP);
    bcm2835_gpio_fsel(EPD_DC_PIN, BCM2835_GPIO_FSEL_OUTP);
    bcm2835_gpio_fsel(EPD_CS_PIN, BCM2835_GPIO_FSEL_OUTP);
    bcm2835_gpio_fsel(EPD_BUSY_PIN, BCM2835_GPIO_FSEL_INPT);

    bcm2835_spi_begin();                                         //Start spi interface, set spi pin for the reuse function
    bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);     //High first transmission
    bcm2835_spi_setDataMode(BCM2835_SPI_MODE0);                  //spi mode 0
    bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_128);  //Frequency
    bcm2835_spi_chipSelect(BCM2835_SPI_CS0);                     //set CE0
    bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, LOW);     //enable cs0

#elif USE_WIRINGPI_LIB
    //if(wiringPiSetup() < 0)//use wiringpi Pin number table
    if(wiringPiSetupGpio() < 0) { //use BCM2835 Pin number table
        printf("set wiringPi lib failed	!!! \r\n");
        return 1;
    } else {
        printf("set wiringPi lib success !!! \r\n");
    }

    // GPIO Config
    pinMode(EPD_RST_PIN, OUTPUT);
    pinMode(EPD_DC_PIN, OUTPUT);
    pinMode(EPD_CS_PIN, OUTPUT);
    pinMode(EPD_BUSY_PIN, INPUT);

    wiringPiSPISetup(0,32000000);
    // wiringPiSPISetupMode(0, 32000000, 0);

#endif
    return 0;
}

/******************************************************************************
function:	Module exits, closes SPI and BCM2835 library
parameter:
Info:
******************************************************************************/
void DEV_Module_Exit(void)
{

#ifdef USE_BCM2835_LIB
    DEV_Digital_Write(EPD_CS_PIN, LOW);
    DEV_Digital_Write(EPD_DC_PIN, LOW);
    DEV_Digital_Write(EPD_RST_PIN, LOW);

    bcm2835_spi_end();
    bcm2835_close();
#elif USE_WIRINGPI_LIB
    DEV_Digital_Write(EPD_CS_PIN, 0);
    DEV_Digital_Write(EPD_DC_PIN, 0);
    DEV_Digital_Write(EPD_RST_PIN, 0);
#endif
}