/*---------------------------------------------------------------------------------------------------------*/
void DACFunctionTest(void)
{
printf("\n");
printf("+----------------------------------------------------------------------+\n");
printf("| DAC software trigger test |\n");
printf("+----------------------------------------------------------------------+\n");
printf("\n\nPlease hit any key to start DAC output\n");
getchar();
/* Set the software trigger, enable DAC even trigger mode and enable D/A converter */
DAC_Open(DAC, 0, DAC_SOFTWARE_TRIGGER);
/* The DAC conversion settling time is 8us */
DAC_SetDelayTime(DAC, 8);
/* Set DAC 12-bit holding data */
DAC_WRITE_DATA(DAC, 0, sine[index]);
/* Clear the DAC conversion complete finish flag for safe */
DAC_CLR_INT_FLAG(DAC, 0);
/* Enable the DAC interrupt */
DAC_ENABLE_INT(DAC, 0);
NVIC_EnableIRQ(DAC_IRQn);
/* Start A/D conversion */
DAC_START_CONV(DAC);
printf("\nHit any key to quit!\n");
while(1)
{
/* Start A/D conversion */
DAC_START_CONV(DAC);
if((DEBUG_PORT->FIFOSTS & UART_FIFOSTS_RXEMPTY_Msk) != 0)
continue;
else
break;
}
return;
}
int32_t main (void)
{
/* Init System, IP clock and multi-function I/O
In the end of SYS_Init() will issue SYS_LockReg()
to lock protected register. If user want to write
protected register, please issue SYS_UnlockReg()
to unlock protected register if necessary */
SYS_Init();
/* Init UART0 for printf */
UART_Open(UART0, 115200);
printf("\nThis sample code demonstrate Timer 0 trigger DAC channel 0 function.\n");
// Enable DAC channel 0, trigger by Timer 0.
DAC_Open(DAC, 0, DAC_TIMER0_TRIGGER);
// Enable DAC0 interrupt. Enable interrupt for one channel is sufficient in group mode.
DAC_ENABLE_INT(DAC, 0);
NVIC_EnableIRQ(DAC_IRQn);
// Wait 'til both channels are ready
while(DAC_IS_BUSY(DAC, 0) == 1);
// Set timer frequency
TIMER_Open(TIMER0, TIMER_PERIODIC_MODE, 100);
// Enable Timer timeout event trigger DAC
TIMER_SetTriggerTarget(TIMER0, TIMER_CTL_DAC_TEEN_Msk);
// Write first data out. timer will 0 will trigger DAC update
DAC_WRITE_DATA(DAC, 0, a16Sine[index0]);
index0 = (index0 + 1) % SINE_ARRAY_SIZE;
// Start Timer 0
TIMER_Start(TIMER0);
while(1);
}
