// initialize ADC0 with an interrupt
// initialize GPIOD.3 for ADC0
// initialize GPTM to trigger ADC at 2ms
void initRangeSensor(void)
{
// enable interrupts for ADC0 in the NVIC
readModWrite_word(CORE_PERIPHERALS, 0x100, 0x00004000,ENABLE);
// enable TIMER0A sysclk
readModWrite_byte(SYSTEM_CONTROL, RCGCTIMER, 0x08,ENABLE);
// enable GPIOD sysclk
readModWrite_byte(SYSTEM_CONTROL, RCGCGPIO, 0x08,ENABLE);
// enable ADC0 sysclk
readModWrite_byte(SYSTEM_CONTROL, RCGCADC, 0x01,ENABLE);
// configure GPIOF for ADC
readModWrite_byte(GPIOD, 0x420, 0x08,ENABLE);
readModWrite_byte(GPIOD, 0x51C, 0x08,DISABLE);
readModWrite_byte(GPIOD, 0x528, 0x08,ENABLE);
// configure TIMER#A for 50ms TAOTE enabled
// disable TIMER3A
write_word(TIMER3, 0x00C, 0); // disable timer
write_word(TIMER3, 0x000, 0); // set to 32bit mode
write_word(TIMER3, 0x004, 0x02); // set to periodic mode
write_word(TIMER3, 0x028, 4000000); // set timer to 50ms
write_word(TIMER3, 0x00C, 0x0021); // enable timer with output enable for adc
// configure ADC0
write_word(ADC0, 0x000, 0); // disable ADC SS
write_word(ADC0, 0x014, 0x0005); // select timer as trigger source
write_word(ADC0, 0x040, 4); // select the ADC sample sequence
write_word(ADC0, 0x044, 0x06); // select the ADC sample sequence to end on first sample and generate an interrupt
write_word(ADC0, 0x008, 0x01); // enable interrupts to get adc data
write_word(ADC0, 0x000, 0x01); // enable ADC SS
}
void initTimerForDacOutput(void)
{
// enable interrupts for TIMER1A in the NVIC
readModWrite_word(CORE_PERIPHERALS, 0x100, 0x00200000,ENABLE);
// enable TIMER1A sysclk
readModWrite_byte(SYSTEM_CONTROL, RCGCTIMER, 0x02,ENABLE);
// configure TIMER1A
write_word(TIMER1, 0x000, 0); // disable timer
write_word(TIMER1, 0x004, 0x02); // set to periodic mode
write_word(TIMER1, 0x028, 20000); // set timer to 250uSec
write_word(TIMER1, 0x018, 0x01); // enable interrupts
write_word(TIMER1, 0x00C, 0x0001); // enable timer
}