/*****************************************************************************
* | File      	:   DEV_Config.c
* | Author      :   Waveshare team
* | Function    :   Hardware underlying interface
* | Info        :
*----------------
* |	This version:   V3.0
* | Date        :   2019-07-31
* | 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 theex 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 "config.h"
#include "DEV_Config.h"
#include "driver/gpio.h"
#include "driver/spi_master.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include <string.h>

#define SPI_PORT SPI2_HOST

// /**
//  * GPIO
// **/
// int EPD_RST_PIN;
// int EPD_DC_PIN;
// int EPD_CS_PIN;
// int EPD_BUSY_PIN;
// int EPD_CLK_PIN;
// int EPD_MOSI_PIN;

spi_device_handle_t spi_device;

/**
 * GPIO read and write
**/
void DEV_Digital_Write(UWORD Pin, UBYTE Value)
{
	gpio_set_level(Pin, Value);
}

UBYTE DEV_Digital_Read(UWORD Pin)
{
	return gpio_get_level(Pin);
}

/**
 * SPI
**/
void DEV_SPI_WriteByte(uint8_t Value)
{
	spi_transaction_t trans;
	memset(&trans, 0, sizeof(spi_transaction_t)); 
    trans.flags = SPI_TRANS_USE_TXDATA;
    trans.length = 8;
    trans.tx_data[0] = Value;
	spi_device_transmit(spi_device, &trans);
}

void DEV_SPI_Write_nByte(uint8_t *pData, uint32_t Len)
{
	if (Len == 0) return;

    spi_transaction_t trans;
	memset(&trans, 0, sizeof(spi_transaction_t)); 
	trans.length = 8*Len;
	trans.tx_buffer = pData;
	spi_device_transmit(spi_device, &trans);
}

/**
 * GPIO Mode
**/
void DEV_GPIO_Mode(UWORD Pin, UWORD Mode)
{
	gpio_config_t io_conf = {
        .pin_bit_mask = (1ULL << Pin),
        .intr_type = GPIO_INTR_DISABLE,
        .pull_down_en = GPIO_PULLDOWN_DISABLE,
        .pull_up_en = GPIO_PULLUP_DISABLE
    };

	if(Mode == 0 || Mode == GPIO_MODE_INPUT) {
		io_conf.mode = GPIO_MODE_INPUT;
		io_conf.pull_up_en = GPIO_PULLUP_ENABLE; 
	} else {
		io_conf.mode = GPIO_MODE_OUTPUT;
	}
	gpio_config(&io_conf);
}

/**
 * delay x ms
**/
void DEV_Delay_ms(UDOUBLE xms)
{
	vTaskDelay(pdMS_TO_TICKS(xms));
}

void DEV_GPIO_Init(void)
{

	// EPD_RST_PIN     = 12;
	// EPD_DC_PIN      = 8;
	// EPD_BUSY_PIN    = 13;
	
	// EPD_CS_PIN      = 9;
	// EPD_CLK_PIN		= 10;
	// EPD_MOSI_PIN	= 11;

	DEV_GPIO_Mode(EPD_RST_PIN, 1);
	DEV_GPIO_Mode(EPD_DC_PIN, 1);
	DEV_GPIO_Mode(EPD_CS_PIN, 1);
	DEV_GPIO_Mode(EPD_BUSY_PIN, 0);

	DEV_Digital_Write(EPD_CS_PIN, 1);
}
/******************************************************************************
function:	Module Initialize, the library and initialize the pins, SPI protocol
parameter:
Info:
******************************************************************************/
UBYTE DEV_Module_Init(void)
{
	// GPIO Config
	DEV_GPIO_Init();

	spi_bus_config_t buscfg = {
        .mosi_io_num = SPI_MOSI,
        .miso_io_num = -1,
        .sclk_io_num = SPI_CLK,
        .quadwp_io_num = -1,
        .quadhd_io_num = -1,
        .max_transfer_sz = 4096
    };
	esp_err_t ret = spi_bus_initialize(SPI_PORT, &buscfg, 1);
	ESP_ERROR_CHECK(ret);

    spi_device_interface_config_t devcfg = {
        .clock_speed_hz = 4000 * 1000,
        .mode = 0,
        .queue_size = 7,
        .spics_io_num = -1
    };
    // Attach the device configuration to the initialized bus
    ret = spi_bus_add_device(SPI_PORT, &devcfg, &spi_device);
    ESP_ERROR_CHECK(ret);
	
    printf("DEV_Module_Init OK \r\n");
	return 0;
}

void DEV_GPIO_Init_1(void)
{
    //spi_deinit(SPI_PORT);
    //gpio_set_function(EPD_CLK_PIN, GPIO_FUNC_SPI);
    //gpio_set_function(EPD_MOSI_PIN, GPIO_FUNC_SPI);
}

void DEV_SPI_Init(void)
{
    //spi_init(SPI_PORT, 4000 * 1000);
    //gpio_set_function(EPD_CLK_PIN, GPIO_FUNC_SPI);
    //gpio_set_function(EPD_MOSI_PIN, GPIO_FUNC_SPI);
}


void DEV_SPI_SendData(UBYTE Reg)
{
	UBYTE i,j=Reg;
	DEV_GPIO_Mode(SPI_MOSI, 1);
    DEV_GPIO_Mode(SPI_CLK, 1);
	DEV_Digital_Write(EPD_CS_PIN, 0);
	for(i = 0; i<8; i++)
    {
        DEV_Digital_Write(SPI_CLK, 0);     
        if (j & 0x80)
        {
            DEV_Digital_Write(SPI_MOSI, 1);
        }
        else
        {
            DEV_Digital_Write(SPI_MOSI, 0);
        }
        
        DEV_Digital_Write(SPI_CLK, 1);
        j = j << 1;
    }
	DEV_Digital_Write(SPI_CLK, 0);
	DEV_Digital_Write(EPD_CS_PIN, 1);
}

UBYTE DEV_SPI_ReadData(void)
{
	UBYTE i,j=0xff;
	DEV_GPIO_Mode(SPI_MOSI, 0);
    DEV_GPIO_Mode(SPI_CLK, 1);
	DEV_Digital_Write(EPD_CS_PIN, 0);
	for(i = 0; i<8; i++)
	{
		DEV_Digital_Write(SPI_CLK, 0);
		j = j << 1;
		if (DEV_Digital_Read(SPI_MOSI))
		{
            j = j | 0x01;
		}
		else
		{
            j= j & 0xfe;
		}
		DEV_Digital_Write(SPI_CLK, 1);
	}
	DEV_Digital_Write(SPI_CLK, 0);
	DEV_Digital_Write(EPD_CS_PIN, 1);
	return j;
}


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

}