//------------------------------------------------------------------------------
void Sd2Card::chipSelectHigh(void) {
digitalWrite(chipSelectPin_, HIGH);
#if defined(_BOARD_MEGA_) || defined(_BOARD_UNO_) || defined(_BOARD_UC32_)
if(fspi_state_saved)
{
SPI2CON = spi_state;
fspi_state_saved = false;
restoreIntEnable(_EXTERNAL_1_IRQ, interrupt_state);
}
#endif
}
//------------------------------------------------------------------------------
void altSDchipSelectHigh(uint8_t csPin) {
digitalWrite(csPin, HIGH);
// On the WiFiShield it is possible for the MRF24 to get an interrupt that
// the PIC32 needs to service the MRF24 while the SD card is selected.
// If this happens the PIC32 MRF Universal Driver code provided by MCHP
// will make an SPI call in the interrupt routine, enabling the CS to the MRF which is on the same
// SPI pins as the SD card, thus causing bot the SD card and MRF24 to be enabled and thus
// causing a SDI/SDO data conflict and hosing both the SD and MRF
// The not so great, but working solution is to disable the MRF interrupt while
// the SD card is selected so the Univerdriver will not also select the MRF
if(fspi_state_saved)
{
SPI2CON = spi_state;
fspi_state_saved = false;
restoreIntEnable(_EXTERNAL_1_IRQ, interrupt_state);
}
}
void LowPower_::snooze(unsigned long ms) {
uint32_t f_pb = getPeripheralClock();
if (switchToLPRC()) {
f_pb = 31250;
}
float baseclock = f_pb;
uint8_t ps = 0;
float f = 1.0 / (ms / 1000.0);
if (baseclock / f > 0xFFFFFFFF) {
baseclock = f_pb / 2;
ps = 1;
}
if (baseclock / f > 0xFFFFFFFF) {
baseclock = f_pb / 4;
ps = 2;
}
if (baseclock / f > 0xFFFFFFFF) {
baseclock = f_pb / 8;
ps = 3;
}
if (baseclock / f > 0xFFFFFFFF) {
baseclock = f_pb / 8;
ps = 3;
}
if (baseclock / f > 0xFFFFFFFF) {
baseclock = f_pb / 16;
ps = 4;
}
if (baseclock / f > 0xFFFFFFFF) {
baseclock = f_pb / 32;
ps = 5;
}
if (baseclock / f > 0xFFFFFFFF) {
baseclock = f_pb / 64;
ps = 6;
}
if (baseclock / f > 0xFFFFFFFF) {
baseclock = f_pb / 256;
ps = 7;
}
uint32_t tcon4 = T4CON;
uint32_t tpr4 = PR4;
uint32_t tmr4 = TMR4;
uint32_t tcon5 = T5CON;
uint32_t tpr5 = PR5;
uint32_t tmr5 = TMR5;
int ipl;
int spl;
T4CON = 0;
T5CON = 0;
T4CONbits.TCKPS = ps;
T4CONbits.T32 = 1;
uint32_t pr = baseclock / f;
PR4 = pr & 0xFFFF;
PR5 = pr >> 16;
isrFunc origIsr = setIntVector(_TIMER_5_VECTOR, _timerWakeup);
getIntPriority(_TIMER_5_VECTOR, &ipl, &spl);
setIntPriority(_TIMER_5_VECTOR, 5, 0);
int en = setIntEnable(_TIMER_5_IRQ);
clearIntFlag(_TIMER_5_IRQ);
TMR4 = 0;
TMR5 = 0;
// If we're going to do this we need to ensure the two timers are enabled!
enableTimer4();
enableTimer5();
int cten = clearIntEnable(_CORE_TIMER_IRQ);
T4CONbits.TON = 1;
enterIdleMode();
restoreIntEnable(_CORE_TIMER_IRQ, cten);
T4CONbits.TON = 0;
setIntPriority(_TIMER_5_VECTOR, ipl, spl);
setIntVector(_TIMER_5_VECTOR, origIsr);
restoreIntEnable(_TIMER_5_IRQ, en);
T5CON = tcon5;
PR5 = tpr5;
TMR5 = tmr5;
T4CON = tcon4;
PR4 = tpr4;
TMR4 = tmr4;
restoreSystemClock();
}
