t6963c.c

#include <avr/io.h>

#include <util/delay.h>

#include <stdio.h>

#include "board.h"

#include "t6963c.h"

#include "sw_uart/uart.h"

// LCD init routine

void t6963c_init(void)

{

  // Define contorl ports and set them as high 

  T6963C_CTRL_DDR |= (1 << T6963C_WR) | (1 << T6963C_RD) | (1 << T6963C_CE) | (1 << T6963C_CD) | (1 << T6963C_RST);

  T6963C_CTRL_PORT |= (1 << T6963C_WR) | (1 << T6963C_RD) | (1 << T6963C_CE) | (1 << T6963C_CD) | (1 << T6963C_RST);

  // Set data lines as input ports

  T6963C_DATA_DDR = 0x00;

  /* Hold Reset Line for 1ms */

  T6963C_CTRL_PORT &= ~(1 << T6963C_RST);

  _delay_ms(2000);

  T6963C_CTRL_PORT |= (1 << T6963C_RST);

  /* Set Char Gen Up */

  uartPutString("t6963c - write command\r\n");

  t6963c_write_command(T6963C_CG_ROM_MODE_TEXT);

  uartPutString("t6963c - write done\r\n");

  /* Set Graphic Home Address */

  t6963c_write_data(T6963C_GRAPHICS_HOME);

  t6963c_write_data(T6963C_GRAPHICS_HOME >> 8);

  t6963c_write_command(T6963C_GRAPHIC_HOME_ADDRESS_SET);

  /* Set Graphic Area */

  t6963c_write_data(T6963C_GRAPHICS_AREA); 

  t6963c_write_data(0x00);

  t6963c_write_command(T6963C_GRAPHIC_AREA_SET);

  /* Set Text Home Address */

  t6963c_write_data(T6963C_TEXT_HOME);

  t6963c_write_data(T6963C_TEXT_HOME >> 8);

  t6963c_write_command(T6963C_TEXT_HOME_ADDRESS_SET);

  /* Set Text Area */

  t6963c_write_data(T6963C_TEXT_AREA); 

  t6963c_write_data(0x00);

  t6963c_write_command(T6963C_TEXT_AREA_SET);

}

void t6963c_write_data(unsigned char data)

{

  /* While BUSY1 and BUSY2 are not 1 */

  while ( (t6963c_read_status() & (T6963C_STATUS_BUSY1 | T6963C_STATUS_BUSY2)) != (T6963C_STATUS_BUSY1 | T6963C_STATUS_BUSY2));

  /* Clear C/D# */

  T6963C_CTRL_PORT &= ~(1 << T6963C_CD);

  /* Set Data Lines to Output */

  T6963C_DATA_DDR = 0xff;

  T6963C_DATA_PORT = data;

  /* Clear CE and WR, set RD */

  T6963C_CTRL_PORT |= (1 << T6963C_RD);

  T6963C_CTRL_PORT &= ~(1 << T6963C_WR);

  T6963C_CTRL_PORT &= ~(1 << T6963C_CE);

  _delay_us(20);

  /* Set CE and RD*/

  T6963C_CTRL_PORT |= (1 << T6963C_CE) | (1 << T6963C_WR) | (1 << T6963C_CD);

  /* Set Data Lines to Input */

  T6963C_DATA_DDR = 0x00;

}

/********************************************

 * Function name: lcd_read_data             *

 * Description:   Read Data From LCD        *

 *******************************************/

unsigned char t6963c_read_data(void)

{

    unsigned char data;

    /* While BUSY1 and BUSY2 are not 1 */

    while ( (t6963c_read_status() & (T6963C_STATUS_BUSY1 | T6963C_STATUS_BUSY2)) != (T6963C_STATUS_BUSY1 | T6963C_STATUS_BUSY2));

    /* Clear C/D# */

    T6963C_CTRL_PORT &= ~(1 << T6963C_CD);

    /* Clear CE and RD, set WR */

    T6963C_CTRL_PORT |= (1 << T6963C_RD);

    T6963C_CTRL_PORT &= ~(1 << T6963C_WR);

    T6963C_CTRL_PORT &= ~(1 << T6963C_CE);

    /* Set Data Lines to Input */

    T6963C_DATA_DDR = 0x00;

    _delay_us(20);

    /* Read Data Bus */

    data = T6963C_DATA_PIN;

    /* Set CE and RD*/

    T6963C_CTRL_PORT |= (1 << T6963C_CE) | (1 << T6963C_WR) | (1 << T6963C_CD);

    return data;

}

/********************************************

 * Function name: lcd_write_command         *

 * Description:   Write Command to LCD      *

 *******************************************/

void t6963c_write_command(unsigned char data)

{

    /* While BUSY1 and BUSY2 are not 1 */

    while ( (t6963c_read_status() & (T6963C_STATUS_BUSY1 | T6963C_STATUS_BUSY2)) != (T6963C_STATUS_BUSY1 | T6963C_STATUS_BUSY2));

    /* Set C/D# */

    T6963C_CTRL_PORT |= (1 << T6963C_CD);

    /* Set Data Lines to Output */

    T6963C_DATA_DDR = 0xff;

    T6963C_DATA_PORT = data;

    /* Clear CE and WR, set RD */

    T6963C_CTRL_PORT |= (1 << T6963C_RD);

    T6963C_CTRL_PORT &= ~(1 << T6963C_WR);

    T6963C_CTRL_PORT &= ~(1 << T6963C_CE);

    _delay_us(40);

    /* Set CE and RD*/

    T6963C_CTRL_PORT |= (1 << T6963C_CE) | (1 << T6963C_WR) | (1 << T6963C_CD);

    /* Set Data Lines to Input */

    T6963C_DATA_DDR = 0x00;

}

/********************************************

 * Function name: lcd_read_status           *

 * Description:   Read Status From LCD      *

 *******************************************/

unsigned char t6963c_read_status(void)

{

    unsigned char data;

    /* Set C/D# */

    T6963C_CTRL_PORT |= (1 << T6963C_CD);

    /* Set Data Lines to Input */

    T6963C_DATA_DDR = 0x00;

    /* Clear CE and RD */

    T6963C_CTRL_PORT &= ~(1 << T6963C_WR);

    T6963C_CTRL_PORT &= ~(1 << T6963C_CE);

    _delay_us(20);

    /* Read Data Bus */

    data = T6963C_DATA_PIN;

    /* Set All Bits */

    T6963C_CTRL_PORT |= (1 << T6963C_CE) | (1 << T6963C_RD) | (1 << T6963C_CD);

  //  char buffer[50];

  //  _delay_ms(200);

  //  sprintf(buffer, "t6963c - data: %x \r\n", data);

  //  uartPutString(buffer);

    return data;

}

void t6963c_clear_text(void)

{

    unsigned char address_l, address_h;

    unsigned int address, address_limit;

    /* Set Address Pointer */

    address = T6963C_TEXT_HOME;

    address_l = address & 0xff;

    address_h = address >> 8;

    t6963c_write_data(address_l);

    t6963c_write_data(address_h);

    t6963c_write_command(T6963C_ADDRESS_POINTER_SET);

        address_limit =  (T6963C_TEXT_HOME + T6963C_TEXT_SIZE);

        while (address < address_limit)

    {

        t6963c_write_data(0x00);

        t6963c_write_command(T6963C_DATA_WRITE_INCREMENT);

        address = address + 1;

    }

    if (T6963C_NUMBER_OF_SCREENS == 0x02)

    {

        /* Set Address Pointer */

        address = T6963C_TEXT_HOME + 0x8000;

        address_l = address & 0xff;

        address_h = address >> 8;

        t6963c_write_data(address_l);

        t6963c_write_data(address_h);

        t6963c_write_command(T6963C_ADDRESS_POINTER_SET);

        address_limit =  (T6963C_TEXT_HOME + T6963C_TEXT_SIZE + 0x8000);

        t6963c_write_command(T6963C_DATA_AUTO_WRITE);

        while (address < address_limit)

        {

            t6963c_write_data(0x00);

            address = address + 1;

        }

  t6963c_write_command(T6963C_DATA_MODE_RESET);

    }

}

/********************************************

 * Function name: lcd_write_text            *

 * Description:   Write Character to X, Y   *

 *                0 <= X <= LCD Text Width  *

 *                0 <= Y <= LCD Text Height *

 *******************************************/

uint8_t t6963c_write_text(unsigned char data, unsigned char x, unsigned char y)

{

    unsigned int address;

    address = (y * T6963C_TEXT_AREA) + x + T6963C_TEXT_HOME;

    if (y > 63 && T6963C_NUMBER_OF_SCREENS == 2) /* If we are on the second screen  and it exists */

    {

        address = address + 0x8000;

    }

    data = data - 0x20;   /* Adjust standard ASCII to T6963 ASCII */

    t6963c_write_data(address & 0xff);

    t6963c_write_data(address >> 0x08);

    t6963c_write_command(T6963C_ADDRESS_POINTER_SET);

    t6963c_write_data(data);

    t6963c_write_command(T6963C_DATA_WRITE_INCREMENT);

    return x+1;

}