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/*
* Copyright (c) 2021, Texas Instruments Incorporated
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "ti_msp_dl_config.h"
#define ADC_SAMPLE_SIZE (1024)
/* When FIFO is enabled 2 samples are compacted in a single word */
#define ADC_FIFO_SAMPLES (ADC_SAMPLE_SIZE >> 1)
uint16_t gADCSamples[ADC_SAMPLE_SIZE];
volatile bool gCheckADC;
void SendString(char *String, int Length)
{
int i;
for(i = 0 ;i < Length ; i++)
{
DL_UART_Main_transmitData(UART_0_INST, String[i]);
delay_cycles(8000);
}
}
int main(void)
{
char Data[100];
int i;
SYSCFG_DL_init();
/* Configure DMA source, destination and size */
DL_DMA_setSrcAddr(DMA, DMA_CH0_CHAN_ID,
(uint32_t) DL_ADC12_getFIFOAddress(ADC12_0_INST));
DL_DMA_setDestAddr(DMA, DMA_CH0_CHAN_ID, (uint32_t) &gADCSamples[0]);
DL_DMA_setTransferSize(DMA, DMA_CH0_CHAN_ID, ADC_FIFO_SAMPLES);
DL_DMA_enableChannel(DMA, DMA_CH0_CHAN_ID);
/* Setup interrupts on device */
NVIC_EnableIRQ(ADC12_0_INST_INT_IRQN);
gCheckADC = false;
DL_ADC12_startConversion(ADC12_0_INST);
// for test ADC noise
while (false == gCheckADC) {
__WFE();
}
DL_ADC12_stopConversion(ADC12_0_INST);
DL_DMA_disableChannel(DMA, DMA_CH0_CHAN_ID);
for(i=0;i<ADC_SAMPLE_SIZE;i++)
{
sprintf(Data,"%04d\n",gADCSamples[i]);
SendString(Data,5);
}
// end
__BKPT(0);
while (1) {
__WFI();
}
}
void ADC12_0_INST_IRQHandler(void)
{
switch (DL_ADC12_getPendingInterrupt(ADC12_0_INST)) {
case DL_ADC12_IIDX_DMA_DONE:
gCheckADC = true;
break;
default:
break;
}
}
