void labinit( void )
{
*trisE &= ~0xff;
*portE = 0;
TRISD |= 0xfe0;
//
T2CONSET = 0x8070; //enable timer2 with 1:256
PR2 = 31250; //set counter
// enable timer2 interrupt and global interrupt
IPCSET(2) = 0x1f; //priority
IECSET(0) = 0x100; //timer2 enable
//SW3
IPCSET(3) = 0x1f; //SW3 priority
IECSET(0) = 0x8000; //SW3 enable interrupt
//enable all interrupts
enable_interrupt();
return;
}
/*
* Setup core timer for `hz' timer interrupts per second.
*/
void
clkstart()
{
unsigned count = mips_read_c0_register (C0_COUNT, 0);
mips_write_c0_register (C0_COMPARE, 0,
count + (CPU_KHZ * 1000 / HZ + 1) / 2);
IECSET(0) = 1 << PIC32_IRQ_CT;
}
/*
* Initialize USB module SFRs and firmware variables to known state.
* Enable interrupts.
*/
void usbinit()
{
usb_device_init();
IECSET(1) = 1 << (PIC32_IRQ_USB - 32);
#if !defined(USB_AUTOBOOT)
/* Wait for any user input. */
while (! cdc_consume(0))
#endif
usb_device_tasks();
}
/* Lab-specific initialization goes here */
void labinit( void ) // Enable interrupts from Timer 2
{
volatile unsigned int* trise = (unsigned int*) 0xbf886100;
*trise = *trise & ~0xff;
// It's possible to use TRISDSET here as well but then it wouldn't be defined
// if the bits not in use are 0 or 1. TRISDCLEAR can be used to clear specific
// bits without affecting other bits.
TRISDSET = 0x7f << 5;
T2CON = 0x0; // Stop timer2
T2CONSET = 0x0070; // Prescale 1:256 Surprise: change 256 to 32 (7 -> 5)
TMR2 = 0; // Timer2 value starts at 0
PR2 = 31250; // Timer2 value ticks to a suitable number
IPC(2) = 1 << 2; // Set priority to 2, sub priority to 3
// We enable interrupts to check the time-out event-flag.
IECSET(0) = 0x0100; // Enable Timer 2 interrupt
enable_interrupt(); // Enable interrupts globaly
T2CONSET = 0x8000; // Start timer2
return;
}