/********************************************************************
* Function: int main()
*
* Precondition: None.
*
* Input: None.
*
* Output: None.
*
* Side Effects: Enables 32-bit Timer2/3. Enables UART.
*
* Overview: Initialization of program and main loop.
*
* Note: None.
********************************************************************/
int main()
{
DWORD_VAL delay;
//Setup bootloader entry delay
sourceAddr.Val = DELAY_TIME_ADDR; //bootloader timer address
delay.Val = ReadLatch(sourceAddr.word.HW, sourceAddr.word.LW); //read BL timeout
//Setup user reset vector
sourceAddr.Val = USER_PROG_RESET;
userReset.Val = ReadLatch(sourceAddr.word.HW, sourceAddr.word.LW);
//Prevent bootloader lockout - if no user reset vector, reset to BL start
if(userReset.Val == 0xFFFFFF){
userReset.Val = BOOT_ADDR_LOW;
}
userResetRead = 0;
//If timeout is zero, check reset state.
if(delay.v[0] == 0){
//If device is returning from reset, BL is disabled call user code
//otherwise assume the BL was called from use code and enter BL
if(RCON & 0xFED3){
//If bootloader disabled, go to user code
ResetDevice(userReset.Val);
}else{
delay.Val = 0xFF;
}
}
T2CONbits.TON = 0;
T2CONbits.T32 = 1; // Setup Timer 2/3 as 32 bit timer incrementing every clock
IFS0bits.T3IF = 0; // Clear the Timer3 Interrupt Flag
IEC0bits.T3IE = 0; // Disable Timer3 Interrupt Service Routine
//Enable timer if not in always-BL mode
if((delay.Val & 0x000000FF) != 0xFF){
//Convert seconds into timer count value
delay.Val = ((DWORD)(FCY)) * ((DWORD)(delay.v[0]));
PR3 = delay.word.HW; //setup timer timeout value
PR2 = delay.word.LW;
TMR2 = 0;
TMR3 = 0;
T2CONbits.TON=1; //enable timer
}
//If using a part with PPS, map the UART I/O
#ifdef DEV_HAS_PPS
ioMap();
#endif
//Configure UART pins to be digital I/O.
#ifdef UTX_ANA
UTX_ANA = 1;
#endif
#ifdef URX_ANA
URX_ANA = 1;
#endif
// SETUP UART COMMS: No parity, one stop bit, autobaud, polled
UxMODEbits.UARTEN = 1; //enable uart
#ifdef USE_AUTOBAUD
UxMODEbits.ABAUD = 1; //use autobaud
#else
UxBRG = BAUDRATEREG;
#endif
#ifdef USE_HI_SPEED_BRG
UxMODEbits.BRGH = 1; //use high speed mode
#endif
UxSTA = 0x0400; //Enable TX
while(1){
#ifdef USE_RUNAWAY_PROTECT
writeKey1 = 0xFFFF; // Modify keys to ensure proper program flow
writeKey2 = 0x5555;
#endif
GetCommand(); //Get full AN851 command from UART
#ifdef USE_RUNAWAY_PROTECT
writeKey1 += 10; // Modify keys to ensure proper program flow
writeKey2 += 42;
#endif
HandleCommand(); //Handle the command
PutResponse(responseBytes); //Respond to sent command
}//end while(1)
}//end main(void)
int main(void)
{
// Start from displaying of PIC24 banners
_display_state = DISP_HELLO;
// Setup PortA IOs as digital
AD1PCFG = 0xffff;
//IO Mapping for PIC24FJ64GA004
#ifdef __PIC24FJ64GA004__ //Defined by MPLAB when using 24FJ64GA004 device
ioMap();
lockIO();
#endif
// Setup SPI to communicate to EEPROM
SPIMPolInit();
// Setup EEPROM IOs
EEPROMInit();
// Setup the UART
UART2Init();
// Setup the timer
TimerInit();
// Setup the LCD
mLCDInit();
// Setup debounce processing
BtnInit();
// Setup the ADC
ADCInit();
// Setup the banner processing
BannerStart();
// Setup the RTCC
RTCCInit();
while (1) {
LCDProcessEvents();
ADCProcessEvents();
if (TimerIsOverflowEvent()){
// Button debounce processing
BtnProcessEvents();
// State dependent processing
switch (_display_state) {
// Show Microchip banners
case DISP_HELLO: BannerProcessEvents(); break;
// Show clock
case DISP_CLOCK: TBannerProcessEvents(); break;
// Show voltage and temperature
case DISP_VOLTAGE: VBannerProcessEvents(); break;
default: _display_state = DISP_HELLO;
}// End of switch (_display_state)...
// If S6 is pressed show the next example
if (BtnIsPressed(4)) {
// Change state and clear display
if(!TBannerIsSetup()){
_display_state++;
if(_display_state > DISP_MAX)
_display_state = 0;
// Initialize state
switch (_display_state) {
// Microchip banners
case DISP_HELLO: BannerInit(); break;
// Clock
case DISP_CLOCK: TBannerInit(); break;
// Voltage and temperature
case DISP_VOLTAGE: VBannerInit(); break;
default:
_display_state = 0;
}// End of switch (_display_state)...
mLCDClear();
}else
TBannerNext();
// wait for button released
while (BtnIsPressed(4)){
BtnProcessEvents();
}
}// End of if (BtnIsPressed(4)){...
if(_display_state == DISP_CLOCK){
if (BtnIsPressed(1)){
TBannerSetup();
// wait for button released
while (BtnIsPressed(1)) BtnProcessEvents();
}// End of if (BtnIsPressed(1 ...
if(TBannerIsSetup()){
if (BtnIsPressed(2)) {
TBannerChangeField(1);
// wait for button released
while (BtnIsPressed(2)) BtnProcessEvents();
}// End of if (BtnIsPressed(2)){...
if (BtnIsPressed(3)) {
// wait for button released
TBannerChangeField(0);
while (BtnIsPressed(3)) BtnProcessEvents();
}// End of if (BtnIsPressed(3)){...
}// End of if(TBannerIsSetup( ...
}// End of if(_display_state == DISP_SET_CLOCK ...
if(_display_state == DISP_VOLTAGE){
if (BtnIsPressed(2)){
ADCSetFromMemory();
// wait for button released
while (BtnIsPressed(2)){
BtnProcessEvents();
}
}// End of if (BtnIsPressed(2 ...
if (BtnIsPressed(3)){
ADCStoreTemperature();
// wait for button released
while (BtnIsPressed(3)){
BtnProcessEvents();
}
}// End of if (BtnIsPressed(3)){...
}// End of if(_display_state ...
}// End of if (TimerIsOverflowEvent()...
}// End of while(1)...
}// End of main()...
