lcd_32122a.c

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#include "lcd_32122a.h"

#include "hw/hw_lcd_32122a.h"

#include "cfg/cfg_lcd_32122a.h"

#include <cfg/macros.h> /* BV() */
#include <cfg/debug.h>
#include <cfg/module.h>

#include <gfx/gfx.h>

#include <drv/timer.h>
#include <drv/pwm.h>

#include <cpu/irq.h>
#include <cpu/types.h>


#define LCD_PAGES 4

#define LCD_PAGESIZE (LCD_WIDTH / 2)

#define LCD_CMD_DISPLAY_ON  0xAF
#define LCD_CMD_DISPLAY_OFF 0xAE
#define LCD_CMD_STARTLINE   0xC0
#define LCD_CMD_PAGEADDR    0xB8
#define LCD_CMD_COLADDR     0x00
#define LCD_CMD_ADC_LEFT    0xA1
#define LCD_CMD_ADC_RIGHT   0xA0
#define LCD_CMD_STATIC_OFF  0xA4
#define LCD_CMD_STATIC_ON   0xA5
#define LCD_CMD_DUTY_32     0xA9
#define LCD_CMD_DUTY_16     0xA8
#define LCD_CMD_RMW_ON      0xE0
#define LCD_CMD_RMW_OFF     0xEE
#define LCD_CMD_RESET       0xE2

/* Status flags */
#define LCDF_BUSY BV(7)

#if CONFIG_LCD_WAIT

    #define WAIT_LCD \
        do { \
            uint8_t status; \
            LCD_DB_IN; \
            do { \
                LCD_SET_RD; \
                LCD_CLR_A0; \
                LCD_SET_E1; \
                LCD_DELAY_READ; \
                status = LCD_READ; \
                LCD_CLR_E1; \
                LCD_SET_A0; \
                LCD_CLR_RD; \
            } while (status & LCDF_BUSY); \
            LCD_DB_OUT; \
        } while (0)
#else /* CONFIG_LCD_WAIT */
    #define WAIT_LCD do {} while(0)
#endif /* CONFIG_LCD_WAIT */


static uint8_t lcd_raster[RAST_SIZE(LCD_WIDTH, LCD_HEIGHT)];

struct Bitmap lcd_bitmap;


#if CONFIG_LCD_SOFTINT_REFRESH

static Timer lcd_refresh_timer;

#endif /* CONFIG_LCD_SOFTINT_REFRESH */


INLINE void lcd_32122_cmd(uint8_t cmd, uint8_t chip)
{
    WAIT_LCD;

    /*      __              __
     * A0   __\____________/__
     *
     * R/W  __________________
     *            ______
     * E1   _____/      \_____
     *
     * DATA --<============>--
     */
    LCD_WRITE(cmd);
    //LCD_DB_OUT;
    LCD_CLR_A0;
    LCD_SET_E(chip);
    LCD_DELAY_WRITE;
    LCD_CLR_E(chip);
    LCD_SET_A0;
    //LCD_DB_IN;

}


INLINE uint8_t lcd_32122_read(uint8_t chip)
{
    uint8_t data;

    WAIT_LCD;

    LCD_DB_IN;
    //LCD_SET_A0;
    LCD_SET_RD;
    LCD_SET_E(chip);
    LCD_DELAY_READ;
    data = LCD_READ;
    LCD_CLR_E(chip);
    LCD_CLR_RD;
    //LCD_CLR_A0;
    LCD_DB_OUT;

    return data;
}

INLINE void lcd_32122_write(uint8_t c, uint8_t chip)
{
    WAIT_LCD;

    LCD_WRITE(c);
    //LCD_DB_OUT;
    //LCD_SET_A0;
    LCD_SET_E(chip);
    LCD_DELAY_WRITE;
    LCD_CLR_E(chip);
    //LCD_CLR_A0;
    //LCD_DB_IN;
}

static void lcd_32122_clear(void)
{
    uint8_t page, j;

    for (page = 0; page < LCD_PAGES; ++page)
    {
        lcd_32122_cmd(LCD_CMD_COLADDR, LCDF_E1 | LCDF_E2);
        lcd_32122_cmd(LCD_CMD_PAGEADDR | page, LCDF_E1 | LCDF_E2);
        for (j = 0; j < LCD_PAGESIZE; j++)
            lcd_32122_write(0, LCDF_E1 | LCDF_E2);
    }
}


static void lcd_32122_writeRaster(const uint8_t *raster)
{
    uint8_t page, rows;
    const uint8_t *right_raster;

    for (page = 0; page < LCD_PAGES; ++page)
    {
        lcd_32122_cmd(LCD_CMD_PAGEADDR | page, LCDF_E1 | LCDF_E2);
        lcd_32122_cmd(LCD_CMD_COLADDR | 0, LCDF_E1 | LCDF_E2);

        /* Super optimized lamer loop */
        right_raster = raster + LCD_PAGESIZE;
        rows = LCD_PAGESIZE;
        do
        {
            lcd_32122_write(*raster++, LCDF_E1);
            lcd_32122_write(*right_raster++, LCDF_E2);
        }
        while (--rows);
        raster = right_raster;
    }
}

#if CONFIG_LCD_SOFTINT_REFRESH

static void lcd_32122_refreshSoftint(void)
{
    lcd_32122_blitBitmap(&lcd_bitmap);
    timer_setDelay(&lcd_refresh_timer, ms_to_ticks(CONFIG_LCD_REFRESH));
    timer_add(&lcd_refresh_timer);
}

#endif /* CONFIG_LCD_SOFTINT_REFRESH */

void lcd_32122_setPwm(int duty)
{
    ASSERT(duty >= LCD_MIN_PWM);
    ASSERT(duty <= LCD_MAX_PWM);

    pwm_setDuty(LCD_PWM_CH, duty);
    pwm_enable(LCD_PWM_CH, true);
}

void lcd_32122_blitBitmap(const Bitmap *bm)
{
    lcd_32122_writeRaster(bm->raster);
}


void lcd_32122_init(void)
{
    MOD_CHECK(timer);

    pwm_init();

    lcd_32122a_hw_bus_init();
    LCD_32122_RESET();

    lcd_32122_cmd(LCD_CMD_RESET, LCDF_E1 | LCDF_E2);
    lcd_32122_cmd(LCD_CMD_DISPLAY_ON, LCDF_E1 | LCDF_E2);
    lcd_32122_cmd(LCD_CMD_STARTLINE | 0, LCDF_E1 | LCDF_E2);


    lcd_32122_clear();
    lcd_32122_setPwm(LCD_DEF_PWM);

    gfx_bitmapInit(&lcd_bitmap, lcd_raster, LCD_WIDTH, LCD_HEIGHT);
    gfx_bitmapClear(&lcd_bitmap);

#if CONFIG_LCD_SOFTINT_REFRESH
    /* Init IRQ driven LCD refresh */
    timer_setSoftint(&lcd_refresh_timer, (Hook)lcd_32122_refreshSoftint, 0);
    timer_setDelay(&lcd_refresh_timer, ms_to_ticks(CONFIG_LCD_REFRESH));
    timer_add(&lcd_refresh_timer);
#endif /* CONFIG_LCD_SOFTINT_REFRESH */

}