/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize(SYSTEM_STATE state) {
switch (state) {
case SYSTEM_STATE_USB_START:
//Configure oscillator settings for clock settings compatible with USB
//operation. Note: Proper settings depends on USB speed (full or low).
#if(USB_SPEED_OPTION == USB_FULL_SPEED)
OSCTUNE = 0x80; //3X PLL ratio mode selected
OSCCON = 0x70; //Switch to 16MHz HFINTOSC
OSCCON2 = 0x10; //Enable PLL, SOSC, PRI OSC drivers turned off
while (OSCCON2bits.PLLRDY != 1); //Wait for PLL lock
ACTCON = 0x90; //Enable active clock tuning for USB operation
#endif
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_POWER_STATE);
LED_On(LED_POWER_STATE);
BUTTON_Enable(BUTTON_LEFT);
BUTTON_Enable(BUTTON_RIGHT);
stepper_motor_enable();
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_D2);
LED_Enable(LED_D3);
LED_Enable(LED_D4);
BUTTON_Enable(BUTTON_S1);
BUTTON_Enable(BUTTON_S2);
BUTTON_Enable(BUTTON_S3);
ADC_Enable(ADC_CHANNEL_1);
ADC_Enable(ADC_CHANNEL_2);
ADC_Enable(ADC_CHANNEL_3);
ADC_SetConfiguration(ADC_CONFIGURATION_DEFAULT);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//Make sure that the general purpose output driver multiplexed with
//the VBUS pin is always consistently configured to be tri-stated in
//USB applications, so as to avoid any possible contention with the host.
//(ex: maintain TRISFbits.TRISF7 = 1 at all times).
TRISFbits.TRISF7 = 1;
//Configure clock settings to be compatible with USB operation.
//This could involve doing nothing (ex: if the config bit settings
//already result in a USB compatible clock frequency at bootup), or,
//could involve clock switching and/or turning on the PLL and/or turning
//on the active clock tuning feature.
#if defined(USB_RUN_FROM_EXPLORER_16_8MHZ_CRYSTAL)
//Don't need to do anything, with the default config bit settings for this
//oscillator setting, since the settings will already be USB compatible.
#else
//Assume USB_RUN_FROM_FRCPLL_WITH_ACTIVE_CLOCK_TUNING is selected instead.
CLKDIV = 0x3120; //Set FRC to 4MHz output mode, and CPUDIV to 1:1 (which is a USB compatible setting)
__builtin_write_OSCCONH(0x01); //0x01 = FRCPLL with postscalar
__builtin_write_OSCCONL(OSCCON | 0x0001); //Set the OSWEN bit, to initiate clock switching operation.
//Wait for PLL lock
while(OSCCONbits.LOCK == 0);
//Turn on the active clock tuning for USB operation
OSCTUN = 0x9000; //Enable active clock tuning from USB host reference
//The oscillator settings should now be USB compatible.
#endif
//Configure other USB or application related resources.
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_USB_DEVICE_HID_KEYBOARD_CAPS_LOCK);
BUTTON_Enable(BUTTON_USB_DEVICE_HID_KEYBOARD_KEY);
BUTTON_Enable(BUTTON_USB_DEVICE_REMOTE_WAKEUP);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
default:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//Make sure that the general purpose output driver multiplexed with
//the VBUS pin is always consistently configured to be tri-stated in
//USB applications, so as to avoid any possible contention with the host.
//(ex: maintain TRISFbits.TRISF7 = 1 at all times).
TRISFbits.TRISF7 = 1;
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_USB_DEVICE_HID_KEYBOARD_CAPS_LOCK);
BUTTON_Enable(BUTTON_USB_DEVICE_HID_KEYBOARD_KEY);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
default:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//On the PIC24FJ64GB004 Family of USB microcontrollers, the PLL will not power up and be enabled
//by default, even if a PLL enabled oscillator configuration is selected (such as HS+PLL).
//This allows the device to power up at a lower initial operating frequency, which can be
//advantageous when powered from a source which is not gauranteed to be adequate for 32MHz
//operation. On these devices, user firmware needs to manually set the CLKDIV<PLLEN> bit to
//power up the PLL.
{
unsigned int pll_startup_counter = 600;
CLKDIVbits.PLLEN = 1;
while(pll_startup_counter--);
}
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_DEVICE_VENDOR_BASIC_DEMO);
BUTTON_Enable(BUTTON_DEVICE_VENDOR_BASIC_DEMO);
break;
default:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//Configure oscillator settings for clock settings compatible with USB
//operation. Note: Proper settings depends on USB speed (full or low).
#if(USB_SPEED_OPTION == USB_FULL_SPEED)
OSCTUNE = 0x80; //3X PLL ratio mode selected
OSCCON = 0x70; //Switch to 16MHz HFINTOSC
OSCCON2 = 0x10; //Enable PLL, SOSC, PRI OSC drivers turned off
while(OSCCON2bits.PLLRDY != 1); //Wait for PLL lock
ACTCON = 0x90; //Enable active clock tuning for USB operation
#endif
LED_Enable(LED_USB_DEVICE_STATE);
BUTTON_Enable(BUTTON_USB_DEVICE_HID_JOYSTICK);
ADC_SetConfiguration(ADC_CONFIGURATION_DEFAULT);
ADC_Enable(ADC_CHANNEL_POTENTIOMETER);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
#if defined(USE_INTERNAL_OSC)
//Make sure to turn on active clock tuning for USB full speed
//operation from the INTOSC
OSCCON = 0xFC; //HFINTOSC @ 16MHz, 3X PLL, PLL enabled
ACTCON = 0x90; //Active clock tuning enabled for USB
#endif
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_USB_DEVICE_HID_CUSTOM);
BUTTON_Enable(BUTTON_USB_DEVICE_HID_CUSTOM);
ADC_SetConfiguration(ADC_CONFIGURATION_DEFAULT);
ADC_Enable(ADC_CHANNEL_POTENTIOMETER);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//Switch to alternate interrupt vector table for bootloader
INTCON2bits.ALTIVT = 1;
BUTTON_Enable(BUTTON_USB_DEVICE_HID_CUSTOM);
if((BUTTON_IsPressed(BUTTON_USB_DEVICE_HID_CUSTOM)==false) && ((RCON & 0x83) != 0))
{
//Switch to app standare IVT for non boot mode
INTCON2bits.ALTIVT = 0;
__asm__("goto 0x1800");
}
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_USB_DEVICE_HID_CUSTOM);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//On the PIC18F46J50 Family of USB microcontrollers, the PLL will not power up and be enabled
//by default, even if a PLL enabled oscillator configuration is selected (such as HS+PLL).
//This allows the device to power up at a lower initial operating frequency, which can be
//advantageous when powered from a source which is not gauranteed to be adequate for 48MHz
//operation. On these devices, user firmware needs to manually set the OSCTUNE<PLLEN> bit to
//power up the PLL.
{
unsigned int pll_startup_counter = 600;
OSCTUNEbits.PLLEN = 1; //Enable the PLL and wait 2+ms until the PLL locks before enabling USB module
while(pll_startup_counter--);
}
//Device switches over automatically to PLL output after PLL is locked and ready.
BUTTON_Enable(BUTTON_USB_DEVICE_HID_CUSTOM);
softStartStatus = SOFT_START_POWER_START;
break;
case SYSTEM_STATE_USB_SUSPEND:
//Configure device for low power consumption. Turn off app power.
AppPowerDisable();
softStartStatus = SOFT_START_POWER_OFF;
break;
case SYSTEM_STATE_USB_RESUME:
softStartStatus = SOFT_START_POWER_START;
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
int value;
switch(state)
{
case SYSTEM_STATE_USB_START:
value = SYSTEMConfigWaitStatesAndPB( 64000000UL );
// Enable the cache for the best performance
CheKseg0CacheOn();
INTEnableSystemMultiVectoredInt();
value = OSCCON;
while (!(value & 0x00000020))
{
value = OSCCON; // Wait for PLL lock to stabilize
}
//Disable JTAG
DDPCONbits.JTAGEN = 0;
LED_Enable(LED_USB_DEVICE_STATE);
BUTTON_Enable(BUTTON_USB_DEVICE_HID_MOUSE);
break;
default:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
#if(USB_SPEED_OPTION == USB_FULL_SPEED)
//Enable INTOSC active clock tuning if full speed
ACTCON = 0x90; //Enable active clock self tuning for USB operation
while(OSCCON2bits.LOCK == 0); //Make sure PLL is locked/frequency is compatible
//with USB operation (ex: if using two speed
//startup or otherwise performing clock switching)
#endif
LED_Enable(LED_USB_DEVICE_STATE);
BUTTON_Enable(BUTTON_DEVICE_HID_DIGITIZER_DEMO);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//In this devices family of USB microcontrollers, the PLL will not power up and be enabled
//by default, even if a PLL enabled oscillator configuration is selected (such as HS+PLL).
//This allows the device to power up at a lower initial operating frequency, which can be
//advantageous when powered from a source which is not gauranteed to be adequate for 48MHz
//operation. On these devices, user firmware needs to manually set the OSCTUNE<PLLEN> bit to
//power up the PLL.
{
unsigned int pll_startup_counter = 600;
OSCTUNEbits.PLLEN = 1; //Enable the PLL and wait 2+ms until the PLL locks before enabling USB module
while(pll_startup_counter--);
}
//Device switches over automatically to PLL output after PLL is locked and ready.
LED_Enable(LED_USB_DEVICE_STATE);
BUTTON_Enable(BUTTON_DEVICE_HID_DIGITIZER_DEMO);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
/*ANSELA = 0x0000;
ANSELB = 0x0000;
ANSELC = 0x0000;
ANSELD = 0x0000;
ANSELE = 0x0000;
ANSELG = 0x0000;*/
// Configure the device PLL to obtain 60 MIPS operation. The crystal
// frequency is 8MHz. Divide 8MHz by 2, multiply by 60 and divide by
// 2. This results in Fosc of 120MHz. The CPU clock frequency is
// Fcy = Fosc/2 = 60MHz. Wait for the Primary PLL to lock and then
// configure the auxilliary PLL to provide 48MHz needed for USB
// Operation.
PLLFBD = 58; /* M = 60 */
CLKDIVbits.PLLPOST = 0; /* N1 = 2 */
CLKDIVbits.PLLPRE = 0; /* N2 = 2 */
OSCTUN = 0;
/* Initiate Clock Switch to Primary
* Oscillator with PLL (NOSC= 0x3)*/
__builtin_write_OSCCONH(0x03);
__builtin_write_OSCCONL(0x01);
while (OSCCONbits.COSC != 0x3);
// Configuring the auxiliary PLL, since the primary
// oscillator provides the source clock to the auxiliary
// PLL, the auxiliary oscillator is disabled. Note that
// the AUX PLL is enabled. The input 8MHz clock is divided
// by 2, multiplied by 24 and then divided by 2. Wait till
// the AUX PLL locks.
ACLKCON3 = 0x24C1;
ACLKDIV3 = 0x7;
ACLKCON3bits.ENAPLL = 1;
while(ACLKCON3bits.APLLCK != 1);
ADC_SetConfiguration(ADC_CONFIGURATION_DEFAULT);
ADC_ChannelEnable(ADC_CHANNEL_POTENTIOMETER);
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_USB_DEVICE_HID_CUSTOM);
BUTTON_Enable(BUTTON_USB_DEVICE_HID_CUSTOM);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYS_Initialize(void)
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: None
*
* Output: None
*
********************************************************************/
void SYS_Initialize()
{
TIMER_SetConfiguration(TIMER_CONFIGURATION_1MS);
ADC_SetConfiguration(ADC_CONFIGURATION_DEFAULT);
LED_Enable(LED_USB_HOST_MSD_DATA_LOGGER);
LED_Off(LED_USB_HOST_MSD_DATA_LOGGER);
BUTTON_Enable(BUTTON_USB_HOST_MSD_DATA_LOGGER);
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
LED_Enable(LED_USB_DEVICE_STATE);
BUTTON_Enable(BUTTON_DEVICE_CDC_BASIC_DEMO);
break;
default:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
LED_Enable(LED_USB_DEVICE_STATE);
BUTTON_Enable(DEVICE_HID_UPS_SIMULATE_DISCHARGE_BUTTON);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
LED_Enable(LED_USB_DEVICE_STATE);
BUTTON_Enable(BUTTON_USB_DEVICE_HID_MOUSE);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
LED_Enable(LED_USB_DEVICE_STATE);
BUTTON_Enable(BUTTON_DEVICE_AUDIO_MICROPHONE_SAMPLE);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//In this devices family of USB microcontrollers, the PLL will not power up and be enabled
//by default, even if a PLL enabled oscillator configuration is selected (such as HS+PLL).
//This allows the device to power up at a lower initial operating frequency, which can be
//advantageous when powered from a source which is not gauranteed to be adequate for 48MHz
//operation. On these devices, user firmware needs to manually set the OSCTUNE<PLLEN> bit to
//power up the PLL.
{
unsigned int pll_startup_counter = 600;
OSCTUNEbits.PLLEN = 1; //Enable the PLL and wait 2+ms until the PLL locks before enabling USB module
while(pll_startup_counter--);
}
//Device switches over automatically to PLL output after PLL is locked and ready.
LED_Enable(LED_USB_DEVICE_STATE);
BUTTON_Enable(BUTTON_DEVICE_AUDIO_MICROPHONE_SAMPLE);
break;
case SYSTEM_STATE_USB_SUSPEND:
//Should also configure all other I/O pins for lowest power consumption.
//Typically this is done by driving unused I/O pins as outputs and driving them high or low.
//In this example, this is not done however, in case the user is expecting the I/O pins
//to remain tri-state and has hooked something up to them.
//Leaving the I/O pins floating will waste power and should not be done in a
//real application.
//Sleep on sleep, 125kHz selected as microcontroller clock source
break;
case SYSTEM_STATE_USB_RESUME:
OSCCON = 0x70; //Primary clock source selected.
//Adding a software start up delay will ensure
//that the primary oscillator and PLL are running before executing any other
//code. If the PLL isn't being used, (ex: primary osc = 48MHz externally applied EC)
//then this code adds a small unnecessary delay, but it is harmless to execute anyway.
{
unsigned int pll_startup_counter = 800; //Long delay at 31kHz, but ~0.8ms at 48MHz
while(pll_startup_counter--); //Clock will switch over while executing this delay loop
}
break;
}
}
/*********************************************************************
* Function: void SYS_Initialize( none )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: None
*
* Output: None
*
********************************************************************/
void SYS_Initialize( )
{
ANSELA = 0x0000;
ANSELB = 0x0000;
ANSELC = 0x0000;
ANSELE = 0x0000;
ANSELG = 0x0000;
// Configure the device PLL to obtain 60 MIPS operation. The crystal
// frequency is 8MHz. Divide 8MHz by 2, multiply by 60 and divide by
// 2. This results in Fosc of 120MHz. The CPU clock frequency is
// Fcy = Fosc/2 = 60MHz. Wait for the Primary PLL to lock and then
// configure the auxilliary PLL to provide 48MHz needed for USB
// Operation.
PLLFBD = 58; /* M = 60 */
CLKDIVbits.PLLPOST = 0; /* N1 = 2 */
CLKDIVbits.PLLPRE = 0; /* N2 = 2 */
OSCTUN = 0;
/* Initiate Clock Switch to Primary
* Oscillator with PLL (NOSC= 0x3)*/
__builtin_write_OSCCONH(0x03);
__builtin_write_OSCCONL(0x01);
while (OSCCONbits.COSC != 0x3);
// Configuring the auxiliary PLL, since the primary
// oscillator provides the source clock to the auxiliary
// PLL, the auxiliary oscillator is disabled. Note that
// the AUX PLL is enabled. The input 8MHz clock is divided
// by 2, multiplied by 24 and then divided by 2. Wait till
// the AUX PLL locks.
ACLKCON3 = 0x24C1;
ACLKDIV3 = 0x7;
ACLKCON3bits.ENAPLL = 1;
while(ACLKCON3bits.APLLCK != 1);
TIMER_SetConfiguration(TIMER_CONFIGURATION_1MS);
ADC_SetConfiguration(ADC_CONFIGURATION_DEFAULT);
LED_Enable(LED_USB_HOST_MSD_DATA_LOGGER);
LED_Off(LED_USB_HOST_MSD_DATA_LOGGER);
BUTTON_Enable(BUTTON_USB_HOST_MSD_DATA_LOGGER);
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
LED_Enable(LED_USB_DEVICE_STATE);
BUTTON_Enable(BUTTON_USB_DEVICE_HID_JOYSTICK);
ADC_SetConfiguration(ADC_CONFIGURATION_DEFAULT);
ADC_Enable(ADC_CHANNEL_POTENTIOMETER);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//Switch to alternate interrupt vector table for bootloader
INTCON2bits.ALTIVT = 1;
BUTTON_Enable(BUTTON_USB_DEVICE_HID_CUSTOM);
if((BUTTON_IsPressed(BUTTON_USB_DEVICE_HID_CUSTOM)==false) && ((RCON & 0x83) != 0))
{
//Switch to app standare IVT for non boot mode
INTCON2bits.ALTIVT = 0;
__asm__("goto 0x1800");
}
//On the PIC24FJ64GB004 Family of USB microcontrollers, the PLL will not power up and be enabled
//by default, even if a PLL enabled oscillator configuration is selected (such as HS+PLL).
//This allows the device to power up at a lower initial operating frequency, which can be
//advantageous when powered from a source which is not gauranteed to be adequate for 32MHz
//operation. On these devices, user firmware needs to manually set the CLKDIV<PLLEN> bit to
//power up the PLL.
{
unsigned int pll_startup_counter = 600;
CLKDIVbits.PLLEN = 1;
while(pll_startup_counter--);
}
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_USB_DEVICE_HID_CUSTOM);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
int value;
switch(state)
{
case SYSTEM_STATE_USB_START:
value = SYSTEMConfigWaitStatesAndPB( 64000000UL );
// Enable the cache for the best performance
CheKseg0CacheOn();
INTEnableSystemMultiVectoredInt();
value = OSCCON;
while (!(value & 0x00000020))
{
value = OSCCON; // Wait for PLL lock to stabilize
}
//Disable JTAG
DDPCONbits.JTAGEN = 0;
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_USB_DEVICE_HID_CUSTOM);
BUTTON_Enable(BUTTON_USB_DEVICE_HID_CUSTOM);
ADC_SetConfiguration(ADC_CONFIGURATION_DEFAULT);
ADC_Enable(ADC_CHANNEL_POTENTIOMETER);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//In this devices family of USB microcontrollers, the PLL will not power up and be enabled
//by default, even if a PLL enabled oscillator configuration is selected (such as HS+PLL).
//This allows the device to power up at a lower initial operating frequency, which can be
//advantageous when powered from a source which is not gauranteed to be adequate for 48MHz
//operation. On these devices, user firmware needs to manually set the OSCTUNE<PLLEN> bit to
//power up the PLL.
{
unsigned int pll_startup_counter = 600;
OSCTUNEbits.PLLEN = 1; //Enable the PLL and wait 2+ms until the PLL locks before enabling USB module
while(pll_startup_counter--);
}
//Device switches over automatically to PLL output after PLL is locked and ready.
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_USB_DEVICE_HID_KEYBOARD_CAPS_LOCK);
BUTTON_Enable(BUTTON_USB_DEVICE_HID_KEYBOARD_KEY);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
OSCCON = 0x70; //Primary clock source selected.
//Adding a software start up delay will ensure
//that the primary oscillator and PLL are running before executing any other
//code. If the PLL isn't being used, (ex: primary osc = 48MHz externally applied EC)
//then this code adds a small unnecessary delay, but it is harmless to execute anyway.
{
unsigned int pll_startup_counter = 800; //Long delay at 31kHz, but ~0.8ms at 48MHz
while(pll_startup_counter--); //Clock will switch over while executing this delay loop
}
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_START:
//Switch to alternate interrupt vector table for bootloader
INTCON2bits.ALTIVT = 1;
BUTTON_Enable(BUTTON_USB_DEVICE_HID_CUSTOM);
if((BUTTON_IsPressed(BUTTON_USB_DEVICE_HID_CUSTOM)==false) && ((RCON & 0x83) != 0))
{
//Switch to app standare IVT for non boot mode
INTCON2bits.ALTIVT = 0;
__asm__("goto 0x1800");
}
ANSELA = 0x0000;
ANSELB = 0x0000;
ANSELC = 0x0000;
ANSELD = 0x0000;
ANSELE = 0x0000;
ANSELG = 0x0000;
// Configure the device PLL to obtain 60 MIPS operation. The crystal
// frequency is 8MHz. Divide 8MHz by 2, multiply by 60 and divide by
// 2. This results in Fosc of 120MHz. The CPU clock frequency is
// Fcy = Fosc/2 = 60MHz. Wait for the Primary PLL to lock and then
// configure the auxilliary PLL to provide 48MHz needed for USB
// Operation.
PLLFBD = 58; /* M = 60 */
CLKDIVbits.PLLPOST = 0; /* N1 = 2 */
CLKDIVbits.PLLPRE = 0; /* N2 = 2 */
OSCTUN = 0;
/* Initiate Clock Switch to Primary
* Oscillator with PLL (NOSC= 0x3)*/
__builtin_write_OSCCONH(0x03);
__builtin_write_OSCCONL(0x01);
while (OSCCONbits.COSC != 0x3);
// Configuring the auxiliary PLL, since the primary
// oscillator provides the source clock to the auxiliary
// PLL, the auxiliary oscillator is disabled. Note that
// the AUX PLL is enabled. The input 8MHz clock is divided
// by 2, multiplied by 24 and then divided by 2. Wait till
// the AUX PLL locks.
ACLKCON3 = 0x24C1;
ACLKDIV3 = 0x7;
ACLKCON3bits.ENAPLL = 1;
while(ACLKCON3bits.APLLCK != 1);
LED_Enable(LED_USB_DEVICE_STATE);
LED_Enable(LED_USB_DEVICE_HID_CUSTOM);
break;
case SYSTEM_STATE_USB_SUSPEND:
break;
case SYSTEM_STATE_USB_RESUME:
break;
}
}
/*********************************************************************
* Function: void SYSTEM_Initialize( SYSTEM_STATE state )
*
* Overview: Initializes the system.
*
* PreCondition: None
*
* Input: SYSTEM_STATE - the state to initialize the system into
*
* Output: None
*
********************************************************************/
void SYSTEM_Initialize( SYSTEM_STATE state )
{
switch(state)
{
case SYSTEM_STATE_USB_HOST:
ANSELA = 0x0000;
ANSELB = 0x0000;
ANSELC = 0x0000;
ANSELD = 0x0000;
ANSELE = 0x0000;
ANSELG = 0x0000;
// Configure the device PLL to obtain 60 MIPS operation. The crystal
// frequency is 8MHz. Divide 8MHz by 2, multiply by 60 and divide by
// 2. This results in Fosc of 120MHz. The CPU clock frequency is
// Fcy = Fosc/2 = 60MHz. Wait for the Primary PLL to lock and then
// configure the auxilliary PLL to provide 48MHz needed for USB
// Operation.
PLLFBD = 58; /* M = 60 */
CLKDIVbits.PLLPOST = 0; /* N1 = 2 */
CLKDIVbits.PLLPRE = 0; /* N2 = 2 */
OSCTUN = 0;
/* Initiate Clock Switch to Primary
* Oscillator with PLL (NOSC= 0x3)*/
__builtin_write_OSCCONH(0x03);
__builtin_write_OSCCONL(0x01);
while (OSCCONbits.COSC != 0x3);
// Configuring the auxiliary PLL, since the primary
// oscillator provides the source clock to the auxiliary
// PLL, the auxiliary oscillator is disabled. Note that
// the AUX PLL is enabled. The input 8MHz clock is divided
// by 2, multiplied by 24 and then divided by 2. Wait till
// the AUX PLL locks.
ACLKCON3 = 0x24C1;
ACLKDIV3 = 0x7;
ACLKCON3bits.ENAPLL = 1;
while(ACLKCON3bits.APLLCK != 1);
//Turn on the USB host regulator switch (U7 - FPF2100) on the board
TRISBbits.TRISB5 = 0;
LATBbits.LATB5 = 1;
LED_Enable(LED_USB_HOST_CDC_BASIC_DEVICE_ATTACHED);
PRINT_SetConfiguration(PRINT_CONFIGURATION_RAM_BUFFER);
break;
case SYSTEM_STATE_USB_HOST_CDC_BASIC:
BUTTON_Enable(BUTTON_USB_HOST_CDC_BASIC);
LED_Enable(LED_USB_HOST_CDC_BASIC_DEVICE_ATTACHED);
PRINT_SetConfiguration(PRINT_CONFIGURATION_RAM_BUFFER);
break;
}
}
