int main() {
unsigned char master_read = 0x00;
__builtin_disable_interrupts();
// set the CP0 CONFIG register to indicate that kseg0 is cacheable (0x3)
__builtin_mtc0(_CP0_CONFIG, _CP0_CONFIG_SELECT, 0xa4210583);
// 0 data RAM access wait states
BMXCONbits.BMXWSDRM = 0x0;
// enable multi vector interrupts
INTCONbits.MVEC = 0x1;
// disable JTAG to get pins back
DDPCONbits.JTAGEN = 0;
// do your TRIS and LAT commands here
TRISAbits.TRISA4 = 1; //set portA4 as input pin for button input
TRISBbits.TRISB4 = 0; //set port B4 as output pin for LED
i2c_init();
i2c_expander_init();
__builtin_enable_interrupts();
while(1) {
master_read = getExpander();
if(master_read>>7 ==0x01)
{
setExpander(0,1);
}else{
setExpander(0,0);
}
}
int main() {
__builtin_disable_interrupts();
// set the CP0 CONFIG register to indicate that kseg0 is cacheable (0x3)
__builtin_mtc0(_CP0_CONFIG, _CP0_CONFIG_SELECT, 0xa4210583);
// 0 data RAM access wait states
BMXCONbits.BMXWSDRM = 0x0;
// enable multi vector interrupts
INTCONbits.MVEC = 0x1;
// disable JTAG to get pins back
DDPCONbits.JTAGEN = 0;
__builtin_enable_interrupts();
initSPI1();
initI2C2();
i2c_master_setup();
initExpander();
//sine wave
int sine[1000];
int i;
for(i = 0; i < 1000; i++){
sine[i] = 128 + 127*sin(2*3.14*10*i/1000);
}
int triangle[1000];
i = 0;
for(i = 0; i < 1000; i++){
triangle[i] = .256*i;
}
i = 0;
while(1) {
_CP0_SET_COUNT(0);
if(_CP0_GET_COUNT() > 24000){
i++;
setVoltage(0, sine[i]);
setVoltage(1, triangle[i]);
_CP0_SET_COUNT(0);
}
if(i > 1000){
i = 0;
}
char status = getExpander(); //read the expander
char g7 = (status & 0x80) >> 7; //get level of pin g7
setExpander(0, g7); //set pin 0 to level of g7
}
}
