void DAC_IRQHandler(void)
{
// clear interrupt flag
DAC_CLR_INT_FLAG(DAC, 0);
DAC_WRITE_DATA(DAC, 0, a16Sine[index0]);
index0 = (index0 + 1) % SINE_ARRAY_SIZE;
return;
}
/*---------------------------------------------------------------------------------------------------------*/
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;
}
/*---------------------------------------------------------------------------------------------------------*/
void DAC_IRQHandler(void)
{
if(DAC_GET_INT_FLAG(DAC, 0))
{
if(index == array_size)
index = 0;
else
{
DAC_WRITE_DATA(DAC, 0, sine[index++]);
/* Clear the DAC conversion complete finish flag */
DAC_CLR_INT_FLAG(DAC, 0);
}
}
return;
}
