/******************************************************************************* * Purpose: Initializes the GPS Module. * Passed: No arguments passed. * Locals: int index - GPS Buffer Index * Returned: No values returned. * Author: Will Flores [email protected] *******************************************************************************/ void gps_init() { int index; // GPS Buffer Index /* 1. Turn GPS OFF before turning it on */ GPS_PWR = OFF; clearScreen(); BNSPrintf(LCD, "\tTurning\nGPS on..."); DisplayDelay(DISPLAY_DELAY1); /* 2. Turn GPS ON */ GPS_PWR = ON; // transistion from low to high timerDelay(2*ONE_SECOND); while(timerA1_started); // wait 2 seconds /* 3. Turn GPS_RESET ON for 250 ms */ //clearScreen(); //BNSPrintf(LCD, "\tGPS\nRESET"); //DisplayDelay(DISPLAY_DELAY); GPS_RESET = ON; // transistion from low to high timerDelay(TWO_FIFTY_MS); while(timerA1_started); // wait 250 ms to transistion this signal /* 4. Pull GPS_PWRCTRL LOW for 2 seconds */ //clearScreen(); //BNSPrintf(LCD,"\tGPSPWRCTRL\nLOW"); GPS_PWRCTRL = OFF; // GPS PWRCNTRL LOW timerDelay(2*ONE_SECOND); while(timerA1_started); // wait 2 seconds //BNSPrintf(LCD, "\tGPSPWRCTRL\nHIGH"); //DisplayDelay(DISPLAY_DELAY); /* 5. Transition GPS_PWRCTRL */ GPS_PWRCTRL = ON; /* 6. Wait until GPS_PWRCHK turns ON */ //clearScreen(); //BNSPrintf(LCD, "\tChecking\nPWRCHK"); //DisplayDelay(DISPLAY_DELAY); while(!GPS_PWRCHK); // GPS PWRCHK /* 7. Release GPS_PWRCTRL */ //clearScreen(); //BNSPrintf(LCD, "\tPWRCTRL\nLOW"); //DisplayDelay(DISPLAY_DELAY); GPS_PWRCTRL = OFF; // Drive PWRCNTRL back to low /* 8. We're done! */ clearScreen(); BNSPrintf(LCD, "\tGPS on!"); DisplayDelay(DISPLAY_DELAY); /* Clear the longitude and latitude buffers */ for (index = 0; index < 13; ++index) { lonGet[index] = latGet[index] = CLEAR_INDEX; } }
/*****************************************************************************
Name: WaitForNotBusy
Parameters: controller must be 1 or 2
Returns: none
Description: This function waits for a controller to clear its busy bit
*****************************************************************************/
void WaitForNotBusy(char controller)
{
while (Busy(controller))
{
DisplayDelay(10);
};
}
/*****************************************************************************
Name: LCD_read
Parameters: value - the value to write
data_or_ctrl - To write value as DATA or CONTROL
1 = DATA
0 = CONTROL
Returns: none
Description: Writes data to display. Sends command to display.
*****************************************************************************/
unsigned char LCD_read(unsigned char data_or_ctrl, unsigned char controller)
{
int value = 0; // return value
int shifted = 0; // To correct for hardware wiring error,
// data must be shifted right once
LCD_Port_Read();
EN_PIN = LOW; // Prepare cycle
RW_PIN = READ;
DI_PIN = data_or_ctrl; // DI SELECT (HIGH=DATA, LOW=CTRL)
if (controller == 1)
{
CS1_PIN = SELECTED; // controller
CS2_PIN = UNSELECTED; // controller
}
else if (controller == 2)
{
CS1_PIN = UNSELECTED; //
CS2_PIN = SELECTED; // controller
}
else if (controller == 3) // Both!
{
CS1_PIN = SELECTED; //
CS2_PIN = SELECTED; //
}
DisplayDelay(0); // We only need a very little delay
EN_PIN = HIGH; // EN enable chip (HIGH)
DisplayDelay(0); // We only need a very little delay
/* read Data */
/* Correct hardware wiring of data pins */
value = LCD_Remap_Read_Data();
EN_PIN = LOW; // Latch data by dropping EN
return value;
}
/*****************************************************************************
Name: InitDisplay
Parameters: none
Returns: none
Description: Intializes the LCD display.
*****************************************************************************/
void LCD_display_init( void )
{
// initial port directions
LCD_Port_Drive();
CS1_PIN = SELECTED; // Preset Values
CS2_PIN = SELECTED;
EN_PIN = HIGH;
RW_PIN = WRITE;
DI_PIN = HIGH;
BACKLIGHT_PIN = LOW;
CS1_PIN_DDR |= DRIVE; // Data Direction Control lines.
CS2_PIN_DDR |= DRIVE;
EN_PIN_DDR |= DRIVE;
RW_PIN_DDR |= DRIVE;
DI_PIN_DDR |= DRIVE;
RESET_PIN_DDR |= DRIVE;
prc2=1; // unprotect as Port 9 is used
BACKLIGHT_PIN_DDR = OUTPUT;
// RESET LCD
EN_PIN = LOW;
RESET_PIN = ASSERT;
DisplayDelay(4);
RESET_PIN = UNASSERTED;
DisplayDelay(4);
WaitForNotBusy(1);
// INITIALIZE REGISTERS:
GotoAddress( 0,0 ); // x=0; y=0;
LCD_write(CTRL,SET_DISPLAY_START+0x00, BOTH );
WaitForNotBusy(1);
LCD_write(CTRL,DISPLAY_ON ,BOTH);
BACKLIGHT_PIN = LOW;
// BACKLIGHT_PIN = HIGH;
}
void InitDisplay(char far StartupString1[] )
//-----------------------------------------------------------------------------------------------------
// Purpose: This will initialize the LCD and then display the define LOGO one line ine
// and the passed parameter StartupString1 on line 2.
//
// Rev: 1.0 Initial Release
//
// Notes: None
//-----------------------------------------------------------------------------------------------------
{
int i;
// initial port directions
prc2=1; // unprotect as Port 9 is used
PORT_DDR = PORT_DDR_VALUE;
EN_PIN = HIGH;
EN_PIN_DDR = HIGH; // set port that controls EN as output
RS_PIN = HIGH;
RS_PIN_DDR = HIGH; // set port that controls RS as output
EN_PIN = LOW;
LCD_write(CTRL_WR,0x33);
DisplayDelay(20);
LCD_write(CTRL_WR,0x32);
DisplayDelay(20);
LCD_write(CTRL_WR,FUNCTION_SET); /* reset sequence */
LCD_write(CTRL_WR,FUNCTION_SET);
LCD_write(CTRL_WR,LCD_CURSOR_OFF);
LCD_write(CTRL_WR,LCD_CLEAR);
LCD_write(CTRL_WR,LCD_HOME_L1);
DisplayString(LCD_LINE1, LOGO);
BNSPrintf(LCD_FILE_NUM, "\t%8s\n%8s",LOGO, StartupString1);
DisplayDelay(6000);
}
/*****************************************************************************
Name: LCD_write_barebones
Parameters: value - the value to write
data_or_ctrl - To write value as DATA or CONTROL
1 = DATA
0 = CONTROL
Returns: none
Description: Does not handle smart controller switching
*****************************************************************************/
void LCD_write_barebones(unsigned char data_or_ctrl, unsigned char value, unsigned char controller)
{
int shifted = 0; // To correct for hardware wiring error,
// data must be shifted right once.
DISABLE_IRQ //
LCD_Port_Drive();
EN_PIN = LOW; // Prepare cycle
RW_PIN = WRITE; // Setup Read Write
DI_PIN = data_or_ctrl; // Data/Instruction SELECT (HIGH=DATA, LOW=CTRL)
if (controller == 1)
{
CS1_PIN = SELECTED; // Chip Select 1
CS2_PIN = UNSELECTED;
}
else if (controller == 2)
{
CS1_PIN = UNSELECTED;
CS2_PIN = SELECTED; // Chip Select 2
}
else if (controller == 3)
{
CS1_PIN = SELECTED; // Both
CS2_PIN = SELECTED; //
}
/* Correct hardware wiring of data pins */
LCD_Remap_n_Send_Data(value);
DisplayDelay(0); // We only need a very little delay
EN_PIN = HIGH; // EN enable chip (HIGH)
DisplayDelay(0); // We only need a very little delay
EN_PIN = LOW; // Latch data by dropping EN
ENABLE_IRQ //
}
/*****************************************************************************
Name: LCD_write
Parameters: value - the value to write
data_or_ctrl - To write value as DATA or CONTROL
1 = DATA
0 = CONTROL
Returns: none
Description: Writes data to display. Sends command to display.
*****************************************************************************/
void LCD_write(unsigned char data_or_ctrl, unsigned char value, unsigned char controller)
{
int shifted = 0; // To correct for hardware wiring error,
// data must be shifted right once.
if ((data_or_ctrl == DATA) && (controller != BOTH))
{
// roll over to controller 2 if necessary:
if (y_address > 63) controller = 2;
if (y_address == 64)
{
LCD_write(CTRL, SET_X_ADDRESS+x_address, 2);
WaitForNotBusy(2);
LCD_write(CTRL, SET_Y_ADDRESS+0, 2);
WaitForNotBusy(2);
}
}
// disable Interrupts. We don't want data bus being
// a) written. b) DDR changed. c) ctrl lines
DISABLE_IRQ
LCD_Port_Drive();
EN_PIN = LOW; // Prepare cycle
RW_PIN = WRITE; // Setup Read Write
DI_PIN = data_or_ctrl; // Data/Instruction SELECT (HIGH=DATA, LOW=CTRL)
if (controller == 1)
{
CS1_PIN = SELECTED; // Chip Select Lines
CS2_PIN = UNSELECTED;
}
else if (controller == 2)
{
CS1_PIN = UNSELECTED;
CS2_PIN = SELECTED; // Chip Select Lines
}
else if (controller == 3)
{
CS1_PIN = SELECTED; // Both
CS2_PIN = SELECTED; //
}
LCD_Remap_n_Send_Data(value);
DisplayDelay(0); // We only need a very little delay
EN_PIN = HIGH; // EN enable chip (HIGH)
DisplayDelay(0); // We only need a very little delay
EN_PIN = LOW; // Latch data by dropping EN
// Re-enable Interrupts
ENABLE_IRQ
if(data_or_ctrl == DATA)
{
y_address++;
if (y_address > 127)
{
x_address++;
if (x_address > 7) x_address=0;
controller = 1;
y_address = 0;
LCD_SendAddresses();
}
}
}
