51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
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/*
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* Example of using AD7705/AD7706 driver
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*
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* Part of esp-open-rtos
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* Copyright (C) 2017 Ruslan V. Uss <unclerus@gmail.com>
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* BSD Licensed as described in the file LICENSE
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*/
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#include <esp/uart.h>
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#include <espressif/esp_common.h>
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#include <stdio.h>
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#include <i2c/i2c.h>
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#include <ad770x/ad770x.h>
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#include <FreeRTOS.h>
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#include <task.h>
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#define CS_PIN 2
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#define AIN_CHANNEL 0 // AIN1+,AIN1- for AD7705
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static const ad770x_params_t dev = {
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.cs_pin = CS_PIN,
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.master_clock = AD770X_MCLK_4_9152MHz, // 4.9152 MHz
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.bipolar = false, // Unipolar mode
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.gain = AD770X_GAIN_1, // No gain
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.update_rate = AD770X_RATE_50 // 50 Hz output update rate
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};
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void user_init(void)
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{
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uart_set_baud(0, 115200);
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printf("SDK version:%s\n", sdk_system_get_sdk_version());
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while (ad770x_init(&dev, AIN_CHANNEL) != 0)
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{
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printf("Cannot initialize AD7705\n");
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vTaskDelay(500 / portTICK_PERIOD_MS);
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}
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while (true)
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{
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// wait for data
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while (!ad770x_data_ready(&dev, AIN_CHANNEL)) {}
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// Read result
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uint16_t raw = ad770x_raw_adc_value(&dev, AIN_CHANNEL);
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printf("Raw ADC value: %d\n", raw);
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vTaskDelay(500 / portTICK_PERIOD_MS);
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}
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}
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