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/*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o 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.
*
* o Neither the name of Freescale Semiconductor, Inc. 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 HOLDER 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 <stdint.h>
#include <stdbool.h>
#include "adc_imx7d.h"
#include "debug_console_imx.h"
#include "board.h"
int main(void)
{
adc_init_config_t adcConfig = {
.sampleRate = 2000,
// For i.MX7D this value should always be set to true.
.levelShifterEnable = true
};
adc_logic_ch_init_config_t adcChannelConfig = {
.inputChannel = BOARD_ADC_INPUT_CHANNEL,
.coutinuousEnable = true,
.convertRate = 1,
.averageEnable = true,
.averageNumber = adcAvgNum32
};
// Initialize board specified hardware.
hardware_init();
PRINTF("\n-------------- ADC imx7d driver example --------------\n\n\r");
PRINTF("This example demonstrates usage of ADC driver on i.MX processor.\n\r");
PRINTF("It Continuous convert Analog Input, and print the result to terminal \n\r");
// Initialize ADC module.
ADC_Init(BOARD_ADC_BASEADDR, &adcConfig);
// Enable Convert finish interrupt on Logic Channel A
ADC_SetIntSigCmd(BOARD_ADC_BASEADDR, adcIntConvertChA, true);
ADC_SetIntCmd(BOARD_ADC_BASEADDR, adcIntConvertChA, true);
/* Set ADC Interrupt priority */
NVIC_SetPriority(BOARD_ADC_IRQ_NUM, 3);
/* Call core API to enable the IRQ. */
NVIC_EnableIRQ(BOARD_ADC_IRQ_NUM);
// Initialize ADC Logic Channel A module.
ADC_LogicChInit(BOARD_ADC_BASEADDR, adcLogicChA, &adcChannelConfig);
// Start Continuous Conversion on Logic Channel A.
ADC_SetConvertCmd(BOARD_ADC_BASEADDR, adcLogicChA, true);
while(1);
}
void BOARD_ADC_HANDLER(void)
{
float voltage;
ADC_ClearStatusFlag(BOARD_ADC_BASEADDR, adcStatusConvertChA);
voltage = (1.8 * ADC_GetConvertResult(BOARD_ADC_BASEADDR, adcLogicChA))/0xFFF;
PRINTF("Current analog value: %3.2fv\n\r", voltage);
}
/*******************************************************************************
* EOF
******************************************************************************/
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