// Perform a 10-bit conversion
// starts conversion, waits until conversion is done, and returns result
unsigned short a2dConvert10bit(unsigned char ch)
{
a2dSetChannel(ch);
a2dCompleteFlag = FALSE; // clear conversion complete flag
outb(ADMUX, (inb(ADMUX) & ~ADC_MUX_MASK) | (ch & ADC_MUX_MASK)); // set channel
sbi(ADCSR, ADIF); // clear hardware "conversion complete" flag
sbi(ADCSR, ADSC); // start conversion
//while(!a2dCompleteFlag); // wait until conversion complete
//while( bit_is_clear(ADCSR, ADIF) ); // wait until conversion complete
while( bit_is_set(ADCSR, ADSC) ); // wait until conversion complete
// CAUTION: MUST READ ADCL BEFORE ADCH!!!
return (inb(ADCL) | (inb(ADCH)<<8)); // read ADC (full 10 bits);
}
void init_peripherals()
{
// LED
DDRC |= (1<<2);
// accel pins
lis3l_init();
// UART
uartInit();
uartSetBaudRate(19200);
uartSetFrameFormat(8, 0, 1);
rprintfInit(uartAddToTxBuffer);
cbi(DDRB, 1); // XBee CTS on PB1
// I2C
itg3200_i2cInit(200);
sbi(PORTC, 0); // i2c SCL on ATmega163,323,16,32,etc
sbi(PORTC, 1); // i2c SDA on ATmega163,323,16,32,etc
cbi(TWCR, TWIE); // disable interrupt
// itg3200_i2cSetBitrate(200); // todo, check if if w ecan do 200
// SPI
mySpiInit();
// a2d
a2dInit();
a2dSetReference(ADC_REFERENCE_256V);
a2dSetChannel(7);
cbi(PORTA, 7);
cbi(DDRA, 7);
a2dStartConvert();
_delay_ms(50);
// accel
BOOL accelOkay = lis3l_Reset();
itg3200_init();
// switch xbee to higher baudrate
// rprintfStr("+++");
// _delay_ms(55);
// rprintfStr("ATBD6,CN\r");
}