75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Email Notes
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* 2022-04-16 Kevin.Liu kevin.liu.mchp@gmail.com First Release
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*/
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#include <rtthread.h>
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#include <atmel_start.h>
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#include "adc_demo.h"
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#ifdef SAM_ADC_EXAMPLE
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#if defined(SOC_SAMC21) || defined(SOC_SAML10)
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#define ADC_RESOLUTION_12BIT ADC_CTRLC_RESSEL_12BIT_Val
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#define ADC_RESOLUTION_16BIT ADC_CTRLC_RESSEL_16BIT_Val
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#elif defined(SOC_SAME54)
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#define ADC_RESOLUTION_12BIT ADC_CTRLB_RESSEL_12BIT_Val
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#define ADC_RESOLUTION_16BIT ADC_CTRLB_RESSEL_16BIT_Val
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#elif defined(SOC_SAME70)
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#define ADC_RESOLUTION_12BIT AFEC_EMR_RES_NO_AVERAGE_Val
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#define ADC_RESOLUTION_16BIT AFEC_EMR_RES_OSR256_Val
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#else
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#error "ADC undefined SOC Platform"
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#endif
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/**
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* @brief Call this function will run ADC test code.
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*
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* @note Test code will try to read ADC conversion result.
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*
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* @param None.
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*
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* @return RT_OK or -RT_ERROR.
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*/
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rt_err_t adc_demo_run(void)
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{
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rt_uint8_t buffer[2];
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/* enable ADC driver module */
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adc_sync_enable_channel(&ADC_0, 0);
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adc_sync_read_channel(&ADC_0, 0, buffer, 2);
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#ifndef RT_USING_FINSH
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rt_kprintf("buf[0]=0x%02X buf[1]=0x%02X\r\n", buffer[0], buffer[1]);
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#endif
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/* ADC 16-bit resolution */
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adc_sync_disable_channel(&ADC_0, 0);
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adc_sync_set_resolution(&ADC_0, ADC_RESOLUTION_16BIT);
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adc_sync_enable_channel(&ADC_0, 0);
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#ifndef RT_USING_FINSH
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rt_kprintf("buf[0]=0x%02X buf[1]=0x%02X\r\n", buffer[0], buffer[1]);
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#endif
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/* ADC 12-bit resolution */
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adc_sync_disable_channel(&ADC_0, 0);
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adc_sync_set_resolution(&ADC_0, ADC_RESOLUTION_12BIT);
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adc_sync_enable_channel(&ADC_0, 0);
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#ifndef RT_USING_FINSH
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rt_kprintf("buf[0]=0x%02X buf[1]=0x%02X\r\n", buffer[0], buffer[1]);
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#endif
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return RT_EOK;
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}
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#endif
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/*@}*/
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