spyglass.c

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/*! \file spyglass.c \brief Spyglass Control Panel UI Board Driver. */
//*****************************************************************************
//
// File Name    : 'spyglass.c'
// Title        : Spyglass Control Panel UI Board Driver
// Author       : Pascal Stang - Copyright (C) 2005
// Created      : 7/20/2005
// Revised      : 7/23/2005
// Version      : 0.9
// Target MCU   : Atmel AVR series
// Editor Tabs  : 4
//
// This code is distributed under the GNU Public License
//      which can be found at http://www.gnu.org/licenses/gpl.txt
//
//*****************************************************************************


#include "global.h"
#include "rprintf.h"
#include "timer.h"
#include "i2c.h"
#include "spyglass.h"

#include "lcd.h"

u08 PcfCtrlData;

u08 pcf8574Write(u08 nodeAddr, u08 data)
{
    // write data
    return i2cMasterSendNI(PCF8574_I2C_BASE_ADDR+(nodeAddr<<1), 1, &data);
}

u08 pcf8574Read(u08 nodeAddr)
{
    u08 data;
    i2cMasterReceiveNI(PCF8574_I2C_BASE_ADDR+(nodeAddr<<1), 1, &data);
    return data;
}

void spyglassInit(void)
{
    i2cInit();
    i2cSetBitrate(100);
    PcfCtrlData = (SPYGLASS_LED0 | SPYGLASS_LED1 | SPYGLASS_BEEPER);
    spyglassSetLeds(0);
    spyglassSetBeeper(0);
}

u08 spyglassGetPushbuttons(void)
{
    return ~pcf8574Read(PCF_NODE_BUTTONS);
}

void spyglassSetLeds(u08 leds)
{
    PcfCtrlData = (PcfCtrlData|0x03) & ~(leds&0x03);
    pcf8574Write(PCF_NODE_CONTROL, PcfCtrlData);
}

void spyglassSetBeeper(u08 state)
{
    if(state)
        PcfCtrlData &=~SPYGLASS_BEEPER;     // beeper on
    else
        PcfCtrlData |= SPYGLASS_BEEPER;     // beeper off
    pcf8574Write(PCF_NODE_CONTROL, PcfCtrlData);
}

u08 spyglassSetLcdContrast(u08 contrast)
{
    u08 data[2];
    data[0] = 0;
    data[1] = contrast;
    return i2cMasterSendNI(MAX517_I2C_BASE_ADDR, 2, data);
}

void spyglassLcdWrite(u08 rs, u08 data)
{
    // prepare LCD control lines
    PcfCtrlData &= ~(SPYGLASS_LCD_RW | SPYGLASS_LCD_RS | SPYGLASS_LCD_E);
    if(rs)
        PcfCtrlData |= SPYGLASS_LCD_RS;
    // set LCD control lines
    pcf8574Write(PCF_NODE_CONTROL, PcfCtrlData);
    // set data lines
    pcf8574Write(PCF_NODE_LCD_DATA, data);
    // clock E line
    pcf8574Write(PCF_NODE_CONTROL, PcfCtrlData|SPYGLASS_LCD_E);
    pcf8574Write(PCF_NODE_CONTROL, PcfCtrlData);
}

void spyglassLcdWriteChar(u08 c)
{
    spyglassLcdWrite(1,c);
}

void spyglassLcdInit(void)
{
    // LCD function set
    spyglassLcdWrite(0,LCD_FUNCTION_DEFAULT);
    // clear LCD
    spyglassLcdWrite(0,1<<LCD_CLR);
    delay(60000);   // wait 60ms
    // set entry mode
    spyglassLcdWrite(0,1<<LCD_ENTRY_MODE | 1<<LCD_ENTRY_INC);
    // set display to on
    spyglassLcdWrite(0,1<<LCD_ON_CTRL | 1<<LCD_ON_DISPLAY );
    // move cursor to home
    spyglassLcdWrite(0,1<<LCD_HOME);
    // set data address to 0
    spyglassLcdWrite(0,1<<LCD_DDRAM | 0x00);

    // set contrast
    spyglassSetLcdContrast(20);
}

void spyglassLcdHome(void)
{
    // move cursor to home
    spyglassLcdWrite(0,1<<LCD_HOME);
}

void spyglassLcdClear(void)
{
    // clear LCD
    spyglassLcdWrite(0,1<<LCD_CLR);
}

void spyglassLcdGotoXY(u08 x, u08 y)
{
    register u08 DDRAMAddr;

    // remap lines into proper order
    switch(y)
    {
    case 0: DDRAMAddr = LCD_LINE0_DDRAMADDR+x; break;
    case 1: DDRAMAddr = LCD_LINE1_DDRAMADDR+x; break;
    case 2: DDRAMAddr = LCD_LINE2_DDRAMADDR+x; break;
    case 3: DDRAMAddr = LCD_LINE3_DDRAMADDR+x; break;
    default: DDRAMAddr = LCD_LINE0_DDRAMADDR+x;
    }

    // set data address
    spyglassLcdWrite(0,1<<LCD_DDRAM | DDRAMAddr);
}

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