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AP_HAL_ESP32: ADC driver ported to new idf 5.x driver and debugged

This commit is contained in:
ARg 2024-10-04 18:44:52 +02:00 committed by Andrew Tridgell
parent 88c06e07d7
commit 47d391fc6d
2 changed files with 186 additions and 110 deletions
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273
libraries/AP_HAL_ESP32/AnalogIn.cpp
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@ -12,7 +12,7 @@
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Code by Charles Villard
* Code by Charles Villard, ARg and Bayu Laksono
*/
#include <AP_HAL/AP_HAL.h>
#include <AP_HAL_ESP32/Semaphores.h>
@ -22,10 +22,10 @@
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "driver/adc.h"
#include "esp_adc_cal.h"
#include "soc/adc_channel.h"
#include "esp_adc/adc_oneshot.h"
#include "esp_adc/adc_cali.h"
#include "esp_adc/adc_cali_scheme.h"
#if HAL_USE_ADC == TRUE && !defined(HAL_DISABLE_ADC_DRIVER)
@ -41,7 +41,7 @@
#define ANALOGIN_DEBUGGING 0
// base voltage scaling for 12 bit 3.3V ADC
#define VOLTAGE_SCALING (3.3f/4096.0f)
#define VOLTAGE_SCALING (3300.0f/4096.0f)
#if ANALOGIN_DEBUGGING
# define Debug(fmt, args ...) do {printf("%s:%d: " fmt "\n", __FUNCTION__, __LINE__, ## args); } while(0)
@ -49,6 +49,10 @@
# define Debug(fmt, args ...)
#endif
//ADC handle
static adc_oneshot_unit_handle_t g_adc1_handle = NULL;
// we are limited to using adc1, and it supports 8 channels max, on gpio, in this order:
// ADC1_CH0=D36,ADC1_CH1=D37,ADC1_CH2=D38,ADC1_CH3=D39,ADC1_CH4=D32,ADC1_CH5=D33,ADC1_CH6=D34,ADC1_CH7=D35
// this driver will only configure the ADCs from a subset of these that the board exposes on pins.
@ -67,46 +71,96 @@ const AnalogIn::pin_info AnalogIn::pin_config[] = HAL_ESP32_ADC_PINS;
#define ADC_GRP1_NUM_CHANNELS ARRAY_SIZE(AnalogIn::pin_config)
#define DEFAULT_VREF 1100 //Use adc2_vref_to_gpio() to obtain a better estimate
#define DEFAULT_VREF 3300 //Use adc2_vref_to_gpio() to obtain a better estimate
#define NO_OF_SAMPLES 256 //Multisampling
static const adc_atten_t atten = ADC_ATTEN_DB_12;
//ardupin is the ardupilot assigned number, starting from 1-8(max)
// 'pin' and _pin is a macro like 'ADC1_GPIO35_CHANNEL' from board config .h
AnalogSource::AnalogSource(int16_t ardupin,int16_t pin,float scaler, float initial_value, uint8_t unit) :
/*---------------------------------------------------------------
ADC Calibration
---------------------------------------------------------------*/
bool adc_calibration_init(adc_unit_t unit, adc_channel_t channel, adc_atten_t atten, adc_cali_handle_t *out_handle)
{
adc_cali_handle_t handle = NULL;
esp_err_t ret = ESP_FAIL;
bool calibrated = false;
_unit(unit),
#if ADC_CALI_SCHEME_CURVE_FITTING_SUPPORTED
if (!calibrated) {
Debug("AnalogIn: calibration scheme version is %s", "Curve Fitting");
adc_cali_curve_fitting_config_t cali_config = {
.unit_id = unit,
.chan = channel,
.atten = atten,
.bitwidth = ADC_BITWIDTH_12,
};
ret = adc_cali_create_scheme_curve_fitting(&cali_config, &handle);
if (ret == ESP_OK) {
calibrated = true;
}
}
#endif
#if ADC_CALI_SCHEME_LINE_FITTING_SUPPORTED
if (!calibrated) {
Debug("AnalogIn: calibration scheme version is %s", "Line Fitting");
adc_cali_line_fitting_config_t cali_config = {
.unit_id = unit,
.atten = atten,
.bitwidth = ADC_BITWIDTH_12,
};
ret = adc_cali_create_scheme_line_fitting(&cali_config, &handle);
if (ret == ESP_OK) {
calibrated = true;
}
}
#endif
*out_handle = handle;
if (ret == ESP_OK) {
Debug("AnalogIn: Calibration Success for channel %d:%d", unit, channel);
} else if (ret == ESP_ERR_NOT_SUPPORTED || !calibrated) {
Debug("AnalogIn: eFuse not burnt, skip software calibration");
} else {
Debug("AnalogIn: Invalid arg or no memory");
}
return calibrated;
}
void adc_calibration_deinit(adc_cali_handle_t handle)
{
#if ADC_CALI_SCHEME_CURVE_FITTING_SUPPORTED
Debug("AnalogIn: deregister %s calibration scheme", "Curve Fitting");
adc_cali_delete_scheme_curve_fitting(handle);
#elif ADC_CALI_SCHEME_LINE_FITTING_SUPPORTED
Debug("AnalogIn: deregister %s calibration scheme", "Line Fitting");
adc_cali_delete_scheme_line_fitting(handle);
#endif
}
//ardupin is the ardupilot assigned number, starting from 1-8(max)
AnalogSource::AnalogSource(int16_t ardupin, adc_channel_t adc_channel, float scaler, float initial_value) :
_ardupin(ardupin),
_pin(pin),
_adc_channel(adc_channel),
_scaler(scaler),
_value(initial_value),
_latest_value(initial_value),
_sum_count(0),
_sum_value(0)
{
printf("AnalogIn: adding ardupin:%d-> which is adc1_offset:%d\n", _ardupin,_pin);
Debug("AnalogIn: adding ardupin:%d-> which is adc1_channel:%d\n", _ardupin, _adc_channel);
// init the pin now if possible, otherwise doo it later from set_pin
if ( _ardupin != ANALOG_INPUT_NONE ) {
// dertermine actial gpio from adc offset and configure it
gpio_num_t gpio;
//Configure ADC
if (unit == 1) {
adc1_config_channel_atten((adc1_channel_t)_pin, atten);
adc1_pad_get_io_num((adc1_channel_t)_pin, &gpio);
} else {
adc2_config_channel_atten((adc2_channel_t)_pin, atten);
}
esp_adc_cal_characteristics_t adc_chars;
esp_adc_cal_characterize(ADC_UNIT_1, atten, ADC_WIDTH_BIT_12, DEFAULT_VREF, &adc_chars);
printf("AnalogIn: determined actual gpio as: %d\n", gpio);
_gpio = gpio;// save it for later
// for now, hard coded using adc1
_adc_unit = ADC_UNIT_1;
adc_oneshot_unit_init_cfg_t init_config = { .unit_id = _adc_unit };
if (!g_adc1_handle && ESP_OK != adc_oneshot_new_unit(&init_config, &g_adc1_handle)) {
Debug("AnalogIn: adc_oneshot_new_unit failed for unit_id = %d\n", _adc_unit);
return;
}
adc_init();
}
@ -119,16 +173,10 @@ float AnalogSource::read_average()
WITH_SEMAPHORE(_semaphore);
if (_sum_count == 0) {
uint32_t adc_reading = 0;
float adc_reading = 0;
//Multisampling
for (int i = 0; i < NO_OF_SAMPLES; i++) {
if (_unit == 1) {
adc_reading += adc1_get_raw((adc1_channel_t)_pin);
} else {
int raw;
adc2_get_raw((adc2_channel_t)_pin, ADC_WIDTH_BIT_12, &raw);
adc_reading += raw;
}
adc_reading += adc_read();
}
adc_reading /= NO_OF_SAMPLES;
return adc_reading;
@ -176,46 +224,37 @@ bool AnalogSource::set_pin(uint8_t ardupin)
if (_ardupin == ardupin) {
return true;
}
_ardupin = ardupin;
int8_t pinconfig_offset = AnalogIn::find_pinconfig(ardupin);
if (pinconfig_offset == -1 ) {
DEV_PRINTF("AnalogIn: sorry set_pin() can't determine ADC1 offset from ardupin : %d \n",ardupin);
Debug("AnalogIn: sorry set_pin() can't determine ADC1 offset from ardupin : %d \n",ardupin);
return false;
}
int16_t newgpioAdcPin = AnalogIn::pin_config[(uint8_t)pinconfig_offset].channel;
adc_channel_t newChannel = (adc_channel_t)AnalogIn::pin_config[(uint8_t)pinconfig_offset].channel;
float newscaler = AnalogIn::pin_config[(uint8_t)pinconfig_offset].scaling;
if (_pin == newgpioAdcPin) {
Debug("AnalogIn: ardupin = %d, new channel = %d\n", ardupin, newChannel);
if (_adc_channel == newChannel) {
return true;
}
WITH_SEMAPHORE(_semaphore);
// init the target pin now if possible
if ( ardupin != ANALOG_INPUT_NONE ) {
if (_adc_cali_handle) {
Debug("AnalogIn: adc_calibration_deinit(%x)\n", (uint)_adc_cali_handle);
gpio_num_t gpio; // new gpio
//Configure ADC
if (_unit == 1) {
adc1_config_channel_atten((adc1_channel_t)newgpioAdcPin, atten);
adc1_pad_get_io_num((adc1_channel_t)newgpioAdcPin, &gpio);
} else {
adc2_config_channel_atten((adc2_channel_t)newgpioAdcPin, atten);
}
adc_calibration_deinit(_adc_cali_handle);
_adc_cali_handle = 0;
}
esp_adc_cal_characteristics_t adc_chars;
esp_adc_cal_characterize(ADC_UNIT_1, atten, ADC_WIDTH_BIT_12, DEFAULT_VREF, &adc_chars);
printf("AnalogIn: Adding gpio on: %d\n", gpio);
_adc_channel = newChannel;
_scaler = newscaler;
DEV_PRINTF("AnalogIn: set_pin() FROM (ardupin:%d adc1_offset:%d gpio:%d) TO (ardupin:%d adc1_offset:%d gpio:%d)\n", \
_ardupin,_pin,_gpio,ardupin,newgpioAdcPin,gpio);
_pin = newgpioAdcPin;
_ardupin = ardupin;
_gpio = gpio;
_scaler = newscaler;
}
adc_init();
_sum_value = 0;
_sum_count = 0;
@ -226,6 +265,60 @@ bool AnalogSource::set_pin(uint8_t ardupin)
}
// init ADC
bool AnalogSource::adc_init()
{
// init the pin now if possible, otherwise doo it later from set_pin
if ( _ardupin != ANALOG_INPUT_NONE ) {
adc_oneshot_chan_cfg_t config = {
.atten = atten,
.bitwidth = ADC_BITWIDTH_12
};
if (ESP_OK != adc_oneshot_config_channel(g_adc1_handle, _adc_channel, &config)) {
Debug("AnalogIn: adc_oneshot_config_channel failed for adc_channel = %d\n", _adc_channel);
return false;
}
else {
Debug("AnalogIn: adc_oneshot_config_channel for adc_channel = %d\n completed successfully", _adc_channel);
}
if (!adc_calibration_init(_adc_unit, _adc_channel, atten, &_adc_cali_handle)){
Debug("AnalogIn: adc_calibration_init failed for adc_channel = %d\n", _adc_channel);
return false;
}
else {
Debug("AnalogIn: adc_calibration_init for adc_channel = %d\n completed successfully", _adc_channel);
}
}
else {
Debug("AnalogIn: adc_init(%d) skipped.\n", _ardupin);
}
return true;
}
// read value from ADC
float AnalogSource::adc_read()
{
int raw, value = 0;
if (ESP_OK != adc_oneshot_read(g_adc1_handle, _adc_channel, &raw)) {
Debug("AnalogIn: adc_oneshot_read failed\n");
return 0;
}
if (_adc_cali_handle) {
if(ESP_OK != adc_cali_raw_to_voltage(_adc_cali_handle, raw, &value)) {
Debug("AnalogIn: adc_oneshot_read failed\n");
return 0;
}
}
else {
value = raw * VOLTAGE_SCALING;
}
return (float)value / 1000;
}
/*
apply a reading in ADC counts
*/
@ -237,12 +330,7 @@ void AnalogSource::_add_value()
WITH_SEMAPHORE(_semaphore);
int value = 0;
if (_unit == 1) {
value = adc1_get_raw((adc1_channel_t)_pin);
} else {
adc2_get_raw((adc2_channel_t)_pin, ADC_WIDTH_BIT_12, &value);
}
float value = adc_read();
_latest_value = value;
_sum_value += value;
@ -254,31 +342,11 @@ void AnalogSource::_add_value()
}
}
static void check_efuse()
{
//Check TP is burned into eFuse
if (esp_adc_cal_check_efuse(ESP_ADC_CAL_VAL_EFUSE_TP) == ESP_OK) {
printf("AnalogIn: eFuse Two Point: Supported\n");
} else {
printf("AnalogIn: eFuse Two Point: NOT supported\n");
}
//Check Vref is burned into eFuse
if (esp_adc_cal_check_efuse(ESP_ADC_CAL_VAL_EFUSE_VREF) == ESP_OK) {
printf("AnalogIn: eFuse Vref: Supported\n");
} else {
printf("AnalogIn: eFuse Vref: NOT supported\n");
}
}
/*
setup adc peripheral to capture samples with DMA into a buffer
*/
void AnalogIn::init()
{
check_efuse();
adc1_config_width(ADC_WIDTH_BIT_12);
}
/*
@ -290,7 +358,7 @@ void AnalogIn::_timer_tick()
ESP32::AnalogSource *c = _channels[j];
if (c != nullptr) {
// add a value
//c->_add_value();
c->_add_value();
}
}
@ -330,39 +398,44 @@ int8_t AnalogIn::find_pinconfig(int16_t ardupin)
//
AP_HAL::AnalogSource *AnalogIn::channel(int16_t ardupin)
{
if (ardupin < 0) ardupin = ANALOG_INPUT_NONE;
Debug("AnalogIn: configuring channel %d\n", ardupin);
int8_t pinconfig_offset = find_pinconfig(ardupin);
int16_t gpioAdcPin = -1;
float scaler = -1;
adc_channel_t adc_channel = (adc_channel_t)ANALOG_INPUT_NONE;
float scaler = 0;
if ((ardupin != ANALOG_INPUT_NONE) && (pinconfig_offset == -1 )) {
DEV_PRINTF("AnalogIn: sorry channel() can't determine ADC1 offset from ardupin : %d \n",ardupin);
Debug("AnalogIn: sorry channel() can't determine ADC1 offset from ardupin : %d \n",ardupin);
ardupin = ANALOG_INPUT_NONE; // default it to this not terrible value and allow to continue
}
// although ANALOG_INPUT_NONE=255 is not a valid pin, we let it through here as
// a special case, so that it can be changed with set_pin(..) later.
if (ardupin != ANALOG_INPUT_NONE) {
gpioAdcPin = pin_config[(uint8_t)pinconfig_offset].channel;
adc_channel = (adc_channel_t)pin_config[(uint8_t)pinconfig_offset].channel;
scaler = pin_config[(uint8_t)pinconfig_offset].scaling;
}
for (uint8_t j = 0; j < ANALOG_MAX_CHANNELS; j++) {
if (_channels[j] == nullptr) {
_channels[j] = NEW_NOTHROW AnalogSource(ardupin,gpioAdcPin, scaler,0.0f,1);
_channels[j] = NEW_NOTHROW AnalogSource(ardupin, adc_channel, scaler, 0.0f);
if (ardupin != ANALOG_INPUT_NONE) {
DEV_PRINTF("AnalogIn: channel:%d attached to ardupin:%d at adc1_offset:%d on gpio:%d\n",\
j,ardupin, gpioAdcPin, _channels[j]->_gpio);
Debug("AnalogIn: channel: %d attached to ardupin:%d at adc1_offset:%d\n",\
j, ardupin, adc_channel);
}
if (ardupin == ANALOG_INPUT_NONE) {
DEV_PRINTF("AnalogIn: channel:%d created but using delayed adc and gpio pin configuration\n",j );
else {
Debug("AnalogIn: channel: %d created but using delayed adc and gpio pin configuration\n", j);
}
return _channels[j];
}
}
DEV_PRINTF("AnalogIn: out of channels\n");
Debug("AnalogIn: out of channels\n");
return nullptr;
}

23
libraries/AP_HAL_ESP32/AnalogIn.h
View File

@ -12,13 +12,17 @@
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Code by Charles Villard
* Code by Charles Villard, ARg and Bayu Laksono
*/
#pragma once
#include "AP_HAL_ESP32.h"
#include "esp_adc/adc_oneshot.h"
#include "esp_adc/adc_cali.h"
#include "esp_adc/adc_cali_scheme.h"
#if HAL_USE_ADC == TRUE && !defined(HAL_DISABLE_ADC_DRIVER)
#define ANALOG_MAX_CHANNELS 8
@ -30,7 +34,7 @@ class AnalogSource : public AP_HAL::AnalogSource
{
public:
friend class AnalogIn;
AnalogSource(int16_t ardupin,int16_t pin,float scaler, float initial_value, uint8_t unit);
AnalogSource(int16_t ardupin, adc_channel_t adc_channel, float scaler, float initial_value);
float read_average() override;
float read_latest() override;
bool set_pin(uint8_t p) override;
@ -42,18 +46,16 @@ public:
private:
//ADC number (1 or 2). ADC2 is unavailable when WIFI on
uint8_t _unit;
adc_unit_t _adc_unit;
//adc Pin number (1-8)
// gpio-adc lower level pin name
int16_t _pin;
//ADC channel
adc_channel_t _adc_channel;
//human readable Pin number used in ardu params
int16_t _ardupin;
//scaling from ADC count to Volts
int16_t _scaler;
// gpio pin number on esp32:
gpio_num_t _gpio;
float _scaler;
adc_cali_handle_t _adc_cali_handle;
//Current computed value (average)
float _value;
@ -64,6 +66,8 @@ private:
//Sum of fetched values
float _sum_value;
bool adc_init();
float adc_read();
void _add_value();
HAL_Semaphore _semaphore;
@ -93,7 +97,6 @@ private:
uint8_t channel; // adc1 pin offset
float scaling;
uint8_t ardupin; // eg 3 , as typed into an ardupilot parameter
uint8_t gpio; // eg 32 for D32 esp pin number/s
};
static const pin_info pin_config[];