ADS1113/ADS1114/ADS1115 I2C DAC driver + example

examples/ads1115_test/Makefile

@@ -0,0 +1,4 @@
+PROGRAM = ads1115_test
+EXTRA_COMPONENTS = extras/i2c extras/ads111x
+#ESPBAUD = 460800
+include ../../common.mk

examples/ads1115_test/main.c

@@ -0,0 +1,55 @@
+/*
+ * Example of using DS1302 RTC driver
+ *
+ * Part of esp-open-rtos
+ * Copyright (C) 2016 Ruslan V. Uss <unclerus@gmail.com>
+ *                    Pavel Merzlyakov <merzlyakovpavel@gmail.com>
+ * BSD Licensed as described in the file LICENSE
+ */
+#include <esp/uart.h>
+#include <espressif/esp_common.h>
+#include <stdio.h>
+#include <i2c/i2c.h>
+#include <ads111x/ads111x.h>
+#include <FreeRTOS.h>
+#include <task.h>
+
+// Connect ADDR pin to GND
+#define ADDR ADS111X_ADDR_GND
+
+#define SCL_PIN 5
+#define SDA_PIN 4
+
+// +-4.096V
+#define GAIN ADS111X_GAIN_4V096
+
+void user_init(void)
+{
+    uart_set_baud(0, 115200);
+    printf("SDK version:%s\n", sdk_system_get_sdk_version());
+
+    i2c_init(SCL_PIN, SDA_PIN);
+
+    ads111x_set_mode(ADDR, ADS111X_MODE_CONTUNOUS);
+    ads111x_set_data_rate(ADDR, ADS111X_DATA_RATE_32);
+
+    ads111x_set_input_mux(ADDR, ADS111X_MUX_0_GND);
+    ads111x_set_gain(ADDR, GAIN);
+
+    float gain_val = ads111x_gain_values[GAIN];
+
+    while (true)
+    {
+        // wait for conversion end
+        while (ads111x_busy(ADDR)) {}
+
+        // Read result
+        int16_t raw = ads111x_get_value(ADDR);
+
+        float voltage = gain_val / ADS111X_MAX_VALUE * raw;
+
+        printf("Raw ADC value: %d, voltage: %.04f volts\n", raw, voltage);
+
+        vTaskDelay(500 / portTICK_PERIOD_MS);
+    }
+}