ili9341_hal.c

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#include "user_config.h"

#include <stdint.h>
#include <stdarg.h>
#include <string.h>
#include <math.h>

#include "display/ili9341.h"

// TFT master window definition
extern window tftwin;
extern window *tft;


uint32_t tft_clock = -1;

uint16_t tft_ID;

#ifdef ESP8266
#ifndef ILI9341_CS
#error ILI9341_CS is undefined
#endif
#define tft_delay_us(a) os_delay_us(a)

#ifndef ADDR_0
#error ADDR_0 is undefined
#endif

#define TFT_DATA        chip_addr(1)
#define TFT_COMMAND     chip_addr(0)

#endif

void tft_spi_init_slow()
{
    tft_clock = 2;
    chip_select_init(ILI9341_CS);
}

void tft_spi_init_fast()
{
    tft_clock = 1;
    chip_select_init(ILI9341_CS);
}

void tft_spi_begin()
{
    spi_begin(tft_clock, ILI9341_CS);
}

void tft_spi_end()
{
    spi_end(ILI9341_CS);
}

void tft_reset_init()
{
#ifdef ILI9341_RESET
    chip_select_init(ILI9341_RESET);
#endif
}

void tft_reset_enable()
{
#ifdef ILI9341_RESET
    chip_enable(ILI9341_RESET);
#endif
}

void tft_addr_init()
{
    chip_addr_init();
}


void tft_reset_disable()
{
#ifdef ILI9341_RESET
    chip_disable(ILI9341_RESET);
#endif
}



void tft_spi_TX(uint8_t *data, int bytes, uint8_t command)
{
    spi_waitReady();
    if(command)
        TFT_COMMAND;
    else
        TFT_DATA;
    spi_TX_buffer(data,bytes);
}

void tft_spi_TXRX(uint8_t * data, int bytes, uint8_t command)
{
    spi_waitReady();
    if(command)
        TFT_COMMAND;
    else
        TFT_DATA;
    spi_TXRX_buffer(data,bytes);
}


void tft_spi_RX(uint8_t *data, int bytes, uint8_t command)
{
    spi_waitReady();
    if(command)
        TFT_COMMAND;
    else
        TFT_DATA;
    spi_RX_buffer(data,bytes);
}

MEMSPACE
window *tft_init(void)
{
    // Start with slow clock so tft_readId works
    // This is the only function that fails at less then 1.
    // tft_readId is the ONLY SPI bus command that needs this.
    // Nomal reads work fine.
    tft_addr_init();
    tft_spi_init_slow();

    // reset display
    tft_reset_init();
    tft_reset_enable();
    tft_delay_us(10000);
    tft_reset_disable();
    tft_delay_us(1000);

    /* Adafruit 9341 TFT Display Initialization */
    tft_configRegister();

    /* Read the TFT ID value */
    tft_ID = tft_readId();

    // fast SPI
    tft_spi_init_fast();

    /* Setup the master window */
    tft_window_init(tft, TFT_XOFF, TFT_YOFF, TFT_W, TFT_H);
    tft_setRotation(0);
    tft_fillWin(tft, tft->bg);

    return (tft);
}