/********************************************************************
Function:
bool USBSleepOnSuspend(void)
Summary:
Places the core into sleep and sets up the USB module
to wake up the device on USB activity.
PreCondition:
IPL (in the SR register) must be non-zero.
Parameters:
None
Return Values:
true - if entered sleep successfully
false - if there was an error entering sleep
Remarks:
Please note that before calling this function that it is the
responsibility of the application to place all of the other
peripherals or board features into a lower power state if
required.
*******************************************************************/
bool USBSleepOnSuspend(void)
{
unsigned int U1EIE_save, U1IE_save, U1OTGIE_save;
unsigned char USB1IE_save;
#if defined(USB_POLLING)
//If IPL is equal to 0 then there is no way for the USB module to
// generate an interrupt to wake up the device.
if(_IPL == 0)
{
return false;
}
//Set the interrupt priority to a level that will wake up the part (>0)
// but will not cause a interrupt vector jump (USB1IP<=IPL)
_USB1IP = 1;
#endif
//Save the old interrupt and CPU settings
U1EIE_save = U1EIE;
U1IE_save = U1IE;
U1OTGIE_save = U1OTGIE;
USB1IE_save = IEC5bits.USB1IE;
//Disable all USB interrupts
U1EIE = 0;
U1IE = 0;
U1OTGIE = 0;
//Enable the interrupt
IFS5bits.USB1IF = 0;
U1OTGIEbits.ACTVIE = 1;
USBClearInterruptFlag(USBActivityIFReg,USBActivityIFBitNum);
IEC5bits.USB1IE = 1;
Sleep();
#if defined(USB_POLLING)
//Disable the interrupt
_USB1IP = 0;
#endif
//restore the previous interrupt settings
IEC5bits.USB1IE = USB1IE_save;
U1EIE = U1EIE_save;
U1IE = U1IE_save;
U1OTGIE = U1OTGIE_save;
return true;
}
void __attribute__ ((interrupt)) _USB1Interrupt(void)
{
#if !defined(self_powered)
if(U1OTGIRbits.ACTVIF)
{
IEC5bits.USB1IE = 0;
U1OTGIEbits.ACTVIE = 0;
IFS5bits.USB1IF = 0;
//USBClearInterruptFlag(USBActivityIFReg,USBActivityIFBitNum);
USBClearInterruptFlag(USBIdleIFReg,USBIdleIFBitNum);
//USBSuspendControl = 0;
}
#endif
}
/*************************************************************************
Function:
BOOL USBSleepOnSuspend(void)
Summary:
Places the PIC24F devices in sleep after enabling the USB activity flag to
wake it back up.
Conditions:
IPL (in the SR register) must be non-zero.
Input:
None
Return:
TRUE - if entered sleep successfully
FALSE - if there was an error entering sleep
Remarks:
None
*************************************************************************/
BOOL USBSleepOnSuspend(void)
{
unsigned int U1EIE_save, U1IE_save, U1OTGIE_save;
unsigned char USB1IE_save;
//Save the old interrupt and CPU settings
U1EIE_save = U1EIE;
U1IE_save = U1IE;
U1OTGIE_save = U1OTGIE;
USB1IE_save = IEC5bits.USB1IE;
#if defined(USB_POLLING)
//If IPL is equal to 0 then there is no way for the USB module to
// generate an interrupt to wake up the device.
if(_IPL == 0)
{
return FALSE;
}
#endif
//Disable all USB interrupts
// 2011/12/13, mar: moved this code down where we do not exit in
// polling mode. In Polling all usb-ir flags were disabled, and
// we could never change to the activated state as the activate
// enable bit was cleared. If we do not use any interrupts, the
// IPL level is 0.
U1EIE = 0;
U1IE = 0;
U1OTGIE = 0;
#if defined(USB_POLLING)
//Set the interrupt priority to a level that will wake up the part (>0)
// but will not cause a interrupt vector jump (USB1IP<=IPL)
_USB1IP = 1;
#endif
//Enable the interrupt
IFS5bits.USB1IF = 0;
U1OTGIEbits.ACTVIE = 1;
USBClearInterruptFlag(USBActivityIFReg,USBActivityIFBitNum);
IEC5bits.USB1IE = 1;
{
/* PIC24FJ64GB004 Family Silicon Errata: point 7 */
unsigned char spienbits[2];
#ifdef __PIC24FJ128GB202__
spienbits[0] = SPI1CON1Lbits.SPIEN;
if(SPI2CON2L&0x8000)
spienbits[1]=1;
else
spienbits[1]=0;
SPI1CON1Lbits.SPIEN = 0;
SPI2CON1L = (SPI2CON1L&0x7FFF);
Sleep();
SPI1CON1Lbits.SPIEN = spienbits[0];
SPI2CON1L = ((SPI2CON1L&0x7FFF) | (spienbits[1]<<15));
#else
spienbits[0] = SPI1STATbits.SPIEN;
spienbits[1] = SPI2STATbits.SPIEN;
SPI1STATbits.SPIEN = 0;
SPI2STATbits.SPIEN = 0;
Sleep();
SPI1STATbits.SPIEN = spienbits[0];
SPI2STATbits.SPIEN = spienbits[1];
#endif
}
#if defined(USB_POLLING)
//Disable the interrupt
_USB1IP = 0;
#endif
//restore the previous interrupt settings
IEC5bits.USB1IE = USB1IE_save;
U1EIE = U1EIE_save;
U1IE = U1IE_save;
U1OTGIE = U1OTGIE_save;
return TRUE;
}
