ADS1113/ADS1114/ADS1115 I2C DAC driver + example
This commit is contained in:
UncleRus
parent
6bd2d15d23
commit
690a4793a6
5 changed files with 555 additions and 0 deletions
4
examples/ads1115_test/Makefile
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4
examples/ads1115_test/Makefile
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PROGRAM = ads1115_test
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EXTRA_COMPONENTS = extras/i2c extras/ads111x
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#ESPBAUD = 460800
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include ../../common.mk
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55
examples/ads1115_test/main.c
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examples/ads1115_test/main.c
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/*
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* Example of using DS1302 RTC driver
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*
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* Part of esp-open-rtos
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* Copyright (C) 2016 Ruslan V. Uss <unclerus@gmail.com>
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* Pavel Merzlyakov <merzlyakovpavel@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 <ads111x/ads111x.h>
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#include <FreeRTOS.h>
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#include <task.h>
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// Connect ADDR pin to GND
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#define ADDR ADS111X_ADDR_GND
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#define SCL_PIN 5
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#define SDA_PIN 4
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// +-4.096V
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#define GAIN ADS111X_GAIN_4V096
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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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i2c_init(SCL_PIN, SDA_PIN);
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ads111x_set_mode(ADDR, ADS111X_MODE_CONTUNOUS);
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ads111x_set_data_rate(ADDR, ADS111X_DATA_RATE_32);
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ads111x_set_input_mux(ADDR, ADS111X_MUX_0_GND);
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ads111x_set_gain(ADDR, GAIN);
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float gain_val = ads111x_gain_values[GAIN];
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while (true)
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{
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// wait for conversion end
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while (ads111x_busy(ADDR)) {}
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// Read result
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int16_t raw = ads111x_get_value(ADDR);
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float voltage = gain_val / ADS111X_MAX_VALUE * raw;
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printf("Raw ADC value: %d, voltage: %.04f volts\n", raw, voltage);
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vTaskDelay(500 / portTICK_PERIOD_MS);
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}
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}
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195
extras/ads111x/ads111x.c
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195
extras/ads111x/ads111x.c
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/*
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* Driver for ADS1113/ADS1114/ADS1115 I2C ADC
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*
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* Part of esp-open-rtos
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* Copyright (C) 2016 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 "ads111x.h"
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#include <i2c/i2c.h>
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#define ADS111X_DEBUG
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#ifdef ADS111X_DEBUG
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#include <stdio.h>
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#define debug(fmt, ...) printf("%s" fmt "\n", "ADS111x: ", ## __VA_ARGS__)
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#else
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#define debug(fmt, ...)
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#endif
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#define REG_CONVERSION 0
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#define REG_CONFIG 1
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#define REG_THRESH_L 2
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#define REG_THRESH_H 3
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#define COMP_QUE_OFFSET 1
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#define COMP_QUE_MASK 0x03
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#define COMP_LAT_OFFSET 2
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#define COMP_LAT_MASK 0x01
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#define COMP_POL_OFFSET 3
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#define COMP_POL_MASK 0x01
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#define COMP_MODE_OFFSET 4
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#define COMP_MODE_MASK 0x01
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#define DR_OFFSET 5
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#define DR_MASK 0x07
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#define MODE_OFFSET 8
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#define MODE_MASK 0x01
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#define PGA_OFFSET 9
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#define PGA_MASK 0x07
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#define MUX_OFFSET 12
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#define MUX_MASK 0x07
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#define OS_OFFSET 15
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#define OS_MASK 0x01
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const float ads111x_gain_values[] = {
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[ADS111X_GAIN_6V144] = 6.144,
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[ADS111X_GAIN_4V096] = 4.096,
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[ADS111X_GAIN_2V048] = 2.048,
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[ADS111X_GAIN_1V024] = 1.024,
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[ADS111X_GAIN_0V512] = 0.512,
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[ADS111X_GAIN_0V256] = 0.256,
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[ADS111X_GAIN_0V256_2] = 0.256,
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[ADS111X_GAIN_0V256_3] = 0.256
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};
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static uint16_t read_reg(uint8_t addr, uint8_t reg)
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{
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uint16_t res = 0;
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if (!i2c_slave_read(addr, reg, (uint8_t *)&res, 2))
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debug("Could not read register %d", reg);
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//debug("Read %d: 0x%04x", reg, res);
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return res;
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}
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static void write_reg(uint8_t addr, uint8_t reg, uint16_t val)
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{
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//debug("Write %d: 0x%04x", reg, val);
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uint8_t buf[3] = {reg, val >> 8, val};
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if (!i2c_slave_write(addr, buf, 3))
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debug("Could not write 0x%04x to register %d", val, reg);
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}
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static uint16_t read_conf_bits(uint8_t addr, uint8_t offs, uint16_t mask)
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{
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return (read_reg(addr, REG_CONFIG) >> offs) & mask;
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}
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static void write_conf_bits(uint8_t addr, uint16_t val, uint8_t offs, uint16_t mask)
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{
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write_reg(addr, REG_CONFIG, (read_reg(addr, REG_CONFIG) & ~(mask << offs)) | (val << offs));
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}
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bool ads111x_busy(uint8_t addr)
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{
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return read_conf_bits(addr, OS_OFFSET, OS_MASK);
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}
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void ads111x_start_conversion(uint8_t addr)
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{
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write_conf_bits(addr, 1, OS_OFFSET, OS_MASK);
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}
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int16_t ads111x_get_value(uint8_t addr)
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{
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return read_reg(addr, REG_CONVERSION);
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}
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ads111x_gain_t ads111x_get_gain(uint8_t addr)
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{
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return read_conf_bits(addr, PGA_OFFSET, PGA_MASK);
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}
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void ads111x_set_gain(uint8_t addr, ads111x_gain_t gain)
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{
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write_conf_bits(addr, gain, PGA_OFFSET, PGA_MASK);
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}
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ads111x_mux_t ads111x_get_input_mux(uint8_t addr)
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{
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return read_conf_bits(addr, MUX_OFFSET, MUX_MASK);
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}
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void ads111x_set_input_mux(uint8_t addr, ads111x_mux_t mux)
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{
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write_conf_bits(addr, mux, MUX_OFFSET, MUX_MASK);
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}
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ads111x_mode_t ads111x_get_mode(uint8_t addr)
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{
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return read_conf_bits(addr, MODE_OFFSET, MODE_MASK);
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}
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void ads111x_set_mode(uint8_t addr, ads111x_mode_t mode)
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{
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write_conf_bits(addr, mode, MODE_OFFSET, MODE_MASK);
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}
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ads111x_data_rate_t ads111x_get_data_rate(uint8_t addr)
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{
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return read_conf_bits(addr, DR_OFFSET, DR_MASK);
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}
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void ads111x_set_data_rate(uint8_t addr, ads111x_data_rate_t rate)
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{
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write_conf_bits(addr, rate, DR_OFFSET, DR_MASK);
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}
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ads111x_comp_mode_t ads111x_get_comp_mode(uint8_t addr)
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{
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return read_conf_bits(addr, COMP_MODE_OFFSET, COMP_MODE_MASK);
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}
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void ads111x_set_comp_mode(uint8_t addr, ads111x_comp_mode_t mode)
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{
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write_conf_bits(addr, mode, COMP_MODE_OFFSET, COMP_MODE_MASK);
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}
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ads111x_comp_polarity_t ads111x_get_comp_polarity(uint8_t addr)
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{
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return read_conf_bits(addr, COMP_POL_OFFSET, COMP_POL_MASK);
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}
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void ads111x_set_comp_polarity(uint8_t addr, ads111x_comp_polarity_t polarity)
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{
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write_conf_bits(addr, polarity, COMP_POL_OFFSET, COMP_POL_MASK);
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}
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ads111x_comp_latch_t ads111x_get_comp_latch(uint8_t addr)
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{
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return read_conf_bits(addr, COMP_LAT_OFFSET, COMP_LAT_MASK);
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}
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void ads111x_set_comp_latch(uint8_t addr, ads111x_comp_latch_t latch)
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{
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write_conf_bits(addr, latch, COMP_LAT_OFFSET, COMP_LAT_MASK);
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}
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ads111x_comp_queue_t ads111x_get_comp_queue(uint8_t addr)
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{
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return read_conf_bits(addr, COMP_QUE_OFFSET, COMP_QUE_MASK);
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}
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void ads111x_set_comp_queue(uint8_t addr, ads111x_comp_queue_t queue)
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{
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write_conf_bits(addr, queue, COMP_QUE_OFFSET, COMP_QUE_MASK);
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}
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int16_t ads111x_get_comp_low_thresh(uint8_t addr)
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{
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return read_reg(addr, REG_THRESH_L);
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}
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void ads111x_set_comp_low_thresh(uint8_t addr, int16_t thresh)
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{
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write_reg(addr, REG_THRESH_L, thresh);
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}
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int16_t ads111x_get_comp_high_thresh(uint8_t addr)
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{
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return read_reg(addr, REG_THRESH_H);
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}
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void ads111x_set_comp_high_thresh(uint8_t addr, int16_t thresh)
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{
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write_reg(addr, REG_THRESH_H, thresh);
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}
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292
extras/ads111x/ads111x.h
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292
extras/ads111x/ads111x.h
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/*
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* Driver for ADS1113/ADS1114/ADS1115 I2C ADC
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*
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* Part of esp-open-rtos
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* Copyright (C) 2016 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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#ifndef _EXTRAS_ADS111X_H_
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#define _EXTRAS_ADS111X_H_
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#include <stdint.h>
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ADS111X_ADDR_GND 0x48
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#define ADS111X_ADDR_VCC 0x49
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#define ADS111X_ADDR_SDA 0x4a
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#define ADS111X_ADDR_SCL 0x4b
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#define ADS111X_MAX_VALUE 0x7fff
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/**
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* Gain amplifier
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*/
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typedef enum
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{
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ADS111X_GAIN_6V144 = 0, //!< +-6.144V
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ADS111X_GAIN_4V096, //!< +-4.096V
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ADS111X_GAIN_2V048, //!< +-2.048V (default)
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ADS111X_GAIN_1V024, //!< +-1.024V
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ADS111X_GAIN_0V512, //!< +-0.512V
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ADS111X_GAIN_0V256, //!< +-0.256V
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ADS111X_GAIN_0V256_2, //!< +-0.256V (same as ADS111X_GAIN_0V256)
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ADS111X_GAIN_0V256_3, //!< +-0.256V (same as ADS111X_GAIN_0V256)
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} ads111x_gain_t;
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/**
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* Gain values
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*/
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extern const float ads111x_gain_values[];
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/**
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* Input multiplexer configuration (ADS1115 only)
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*/
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typedef enum
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{
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ADS111X_MUX_0_1 = 0, //!< positive = AIN0, negative = AIN1 (default)
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ADS111X_MUX_0_3, //!< positive = AIN0, negative = AIN3
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ADS111X_MUX_1_3, //!< positive = AIN1, negative = AIN3
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ADS111X_MUX_2_3, //!< positive = AIN2, negative = AIN3
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ADS111X_MUX_0_GND, //!< positive = AIN0, negative = GND
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ADS111X_MUX_1_GND, //!< positive = AIN1, negative = GND
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ADS111X_MUX_2_GND, //!< positive = AIN2, negative = GND
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ADS111X_MUX_3_GND, //!< positive = AIN3, negative = GND
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} ads111x_mux_t;
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/**
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* Data rate
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*/
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typedef enum
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{
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ADS111X_DATA_RATE_8 = 0, //!< 8 samples per second
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ADS111X_DATA_RATE_16, //!< 16 samples per second
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ADS111X_DATA_RATE_32, //!< 32 samples per second
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ADS111X_DATA_RATE_64, //!< 64 samples per second
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ADS111X_DATA_RATE_128, //!< 128 samples per second (default)
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ADS111X_DATA_RATE_250, //!< 250 samples per second
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ADS111X_DATA_RATE_475, //!< 475 samples per second
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ADS111X_DATA_RATE_860 //!< 860 samples per second
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} ads111x_data_rate_t;
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/**
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* Operational mode
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*/
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typedef enum
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{
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ADS111X_MODE_CONTUNOUS = 0, //!< Continuous conversion mode
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ADS111X_MODE_SINGLE_SHOT //!< Power-down single-shot mode (default)
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} ads111x_mode_t;
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/**
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* Comparator mode (ADS1114 and ADS1115 only)
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*/
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typedef enum
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{
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ADS111X_COMP_MODE_NORMAL = 0, //!< Traditional comparator with hysteresis (default)
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ADS111X_COMP_MODE_WINDOW //!< Window comparator
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} ads111x_comp_mode_t;
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/**
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* Comparator polarity (ADS1114 and ADS1115 only)
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*/
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typedef enum
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{
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ADS111X_COMP_POLARITY_LOW = 0, //!< Active low (default)
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ADS111X_COMP_POLARITY_HIGH //!< Active high
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} ads111x_comp_polarity_t;
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/**
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* Comparator latch (ADS1114 and ADS1115 only)
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*/
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typedef enum
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{
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ADS111X_COMP_LATCH_DISABLED = 0, //!< Non-latching comparator (default)
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ADS111X_COMP_LATCH_ENABLED //!< Latching comparator
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} ads111x_comp_latch_t;
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/**
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* Comparator queue
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*/
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typedef enum
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{
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ADS111X_COMP_QUEUE_1 = 0, //!< Assert ALERT/RDY pin after one conversion
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ADS111X_COMP_QUEUE_2, //!< Assert ALERT/RDY pin after two conversions
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ADS111X_COMP_QUEUE_4, //!< Assert ALERT/RDY pin after four conversions
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ADS111X_COMP_QUEUE_DISABLED //!< Disable comparator (default)
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} ads111x_comp_queue_t;
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/**
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* Get device operational status
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* @param addr Deivce address
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* @return true when device performing conversion
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*/
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bool ads111x_busy(uint8_t addr);
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/**
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* Begin a single conversion (when in single-shot mode)
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* @param addr Deivce address
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*/
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void ads111x_start_conversion(uint8_t addr);
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/**
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* Read last conversion result
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* @param addr
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* @return Last conversion result
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*/
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int16_t ads111x_get_value(uint8_t addr);
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/**
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* Read the programmable gain amplifier configuration
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* (ADS1114 and ADS1115 only).
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* @param addr Deivce address
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* @return Gain value
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*/
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ads111x_gain_t ads111x_get_gain(uint8_t addr);
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/**
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* Configure the programmable gain amplifier (ADS1114 and ADS1115 only)
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* @param addr Deivce address
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* @param gain Gain value
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*/
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void ads111x_set_gain(uint8_t addr, ads111x_gain_t gain);
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/**
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* Read the input multiplexer configuration (ADS1115 only)
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* @param addr Deivce address
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* @return Input multiplexer configuration
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*/
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ads111x_mux_t ads111x_get_input_mux(uint8_t addr);
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/**
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* Configure the input multiplexer configuration (ADS1115 only)
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* @param addr Deivce address
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* @param mux Input multiplexer configuration
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*/
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void ads111x_set_input_mux(uint8_t addr, ads111x_mux_t mux);
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/**
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* Read the device operating mode
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* @param addr Deivce address
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* @return Device operating mode
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*/
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ads111x_mode_t ads111x_get_mode(uint8_t addr);
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/**
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* Set the device operating mode
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* @param addr Deivce address
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* @param mode Device operating mode
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*/
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void ads111x_set_mode(uint8_t addr, ads111x_mode_t mode);
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/**
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* Read the data rate
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* @param addr Deivce address
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* @return Data rate
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*/
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ads111x_data_rate_t ads111x_get_data_rate(uint8_t addr);
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/**
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* Configure the data rate
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* @param addr Deivce address
|
||||
* @param rate Data rate
|
||||
*/
|
||||
void ads111x_set_data_rate(uint8_t addr, ads111x_data_rate_t rate);
|
||||
|
||||
/**
|
||||
* Get comparator mode (ADS1114 and ADS1115 only)
|
||||
* @param addr Deivce address
|
||||
* @return Comparator mode
|
||||
*/
|
||||
ads111x_comp_mode_t ads111x_get_comp_mode(uint8_t addr);
|
||||
|
||||
/**
|
||||
* Set comparator mode (ADS1114 and ADS1115 only)
|
||||
* @param addr Deivce address
|
||||
* @param mode Comparator mode
|
||||
*/
|
||||
void ads111x_set_comp_mode(uint8_t addr, ads111x_comp_mode_t mode);
|
||||
|
||||
/**
|
||||
* Get polarity of the comparator output pin ALERT/RDY
|
||||
* (ADS1114 and ADS1115 only)
|
||||
* @param addr Deivce address
|
||||
* @return Comparator output pin polarity
|
||||
*/
|
||||
ads111x_comp_polarity_t ads111x_get_comp_polarity(uint8_t addr);
|
||||
|
||||
/**
|
||||
* Set polarity of the comparator output pin ALERT/RDY
|
||||
* (ADS1114 and ADS1115 only)
|
||||
* @param addr Deivce address
|
||||
* @param polarity Comparator output pin polarity
|
||||
*/
|
||||
void ads111x_set_comp_polarity(uint8_t addr, ads111x_comp_polarity_t polarity);
|
||||
|
||||
/**
|
||||
* Get comparator output latch mode, see datasheet.
|
||||
* (ADS1114 and ADS1115 only)
|
||||
* @param addr Deivce address
|
||||
* @return Comparator output latch mode
|
||||
*/
|
||||
ads111x_comp_latch_t ads111x_get_comp_latch(uint8_t addr);
|
||||
|
||||
/**
|
||||
* Set comparator output latch mode (ADS1114 and ADS1115 only)
|
||||
* @param addr Deivce address
|
||||
* @param latch Comparator output latch mode
|
||||
*/
|
||||
void ads111x_set_comp_latch(uint8_t addr, ads111x_comp_latch_t latch);
|
||||
|
||||
/**
|
||||
* Set number of the comparator conversions before pin ALERT/RDY
|
||||
* assertion, or disable comparator (ADS1114 and ADS1115 only)
|
||||
* @param addr Deivce address
|
||||
* @return Number of the comparator conversions
|
||||
*/
|
||||
ads111x_comp_queue_t ads111x_get_comp_queue(uint8_t addr);
|
||||
|
||||
/**
|
||||
* Get number of the comparator conversions before pin ALERT/RDY
|
||||
* assertion (ADS1114 and ADS1115 only)
|
||||
* @param addr Deivce address
|
||||
* @param queue Number of the comparator conversions
|
||||
*/
|
||||
void ads111x_set_comp_queue(uint8_t addr, ads111x_comp_queue_t queue);
|
||||
|
||||
/**
|
||||
* Get the lower threshold value used by comparator
|
||||
* @param addr Deivce address
|
||||
* @return Lower threshold value
|
||||
*/
|
||||
int16_t ads111x_get_comp_low_thresh(uint8_t addr);
|
||||
|
||||
/**
|
||||
* Set the lower threshold value used by comparator
|
||||
* @param addr Deivce address
|
||||
* @param thresh Lower threshold value
|
||||
*/
|
||||
void ads111x_set_comp_low_thresh(uint8_t addr, int16_t thresh);
|
||||
|
||||
/**
|
||||
* Get the upper threshold value used by comparator
|
||||
* @param addr Deivce address
|
||||
* @return Upper threshold value
|
||||
*/
|
||||
int16_t ads111x_get_comp_high_thresh(uint8_t addr);
|
||||
|
||||
/**
|
||||
* Set the upper threshold value used by comparator
|
||||
* @param addr Deivce address
|
||||
* @param thresh Upper threshold value
|
||||
*/
|
||||
void ads111x_set_comp_high_thresh(uint8_t addr, int16_t thresh);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* _EXTRAS_ADS111X_H_ */
|
||||
9
extras/ads111x/component.mk
Normal file
9
extras/ads111x/component.mk
Normal file
|
|
@ -0,0 +1,9 @@
|
|||
# Component makefile for extras/ads111x
|
||||
|
||||
# expected anyone using ADC driver includes it as 'ads111x/ads111x.h'
|
||||
INC_DIRS += $(ads111x_ROOT)..
|
||||
|
||||
# args for passing into compile rule generation
|
||||
ads111x_SRC_DIR = $(ads111x_ROOT)
|
||||
|
||||
$(eval $(call component_compile_rules,ads111x))
|
||||
Loading…
Reference in a new issue