Page 10 of 16
Page 247
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "hal/adc_types.h"
#include "esp_adc/adc_oneshot.h"
void app_main(void)
{
adc_oneshot_unit_handle_t adc1_handle;
adc_oneshot_unit_init_cfg_t init_config1 = {
.unit_id = ADC_UNIT_1,
.ulp_mode = ADC_ULP_MODE_DISABLE,
};
adc_oneshot_new_unit(&init_config1, &adc1_handle);
adc_oneshot_chan_cfg_t config = {
.bitwidth = ADC_BITWIDTH_DEFAULT,
};
adc_oneshot_config_channel(adc1_handle, ADC_CHANNEL_6, &config);
int data;
while (true)
{
adc_oneshot_read(adc1_handle, ADC_CHANNEL_6, &data);
printf("%d\n", data);
fflush(stdout);
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
}
Page 248
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "hal/adc_types.h"
#include "esp_adc/adc_oneshot.h"
#include "esp_adc/adc_cali.h"
#include "esp_adc/adc_cali_scheme.h"
void app_main(void)
{
adc_cali_scheme_ver_t scheme_mask;
adc_cali_check_scheme(&scheme_mask);
if (scheme_mask & ADC_CALI_SCHEME_VER_CURVE_FITTING)
{
printf("Curve Fit %d\n", scheme_mask);
}
else
{
if (scheme_mask & ADC_CALI_SCHEME_VER_LINE_FITTING)
{
printf("Line Fit %d\n", scheme_mask);
}
}
}
Page 249
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "hal/adc_types.h"
#include "esp_adc/adc_oneshot.h"
#include "esp_adc/adc_cali.h"
#include "esp_adc/adc_cali_scheme.h"
void app_main(void)
{
adc_oneshot_unit_handle_t adc1_handle;
adc_oneshot_unit_init_cfg_t init_config1 = {
.unit_id = ADC_UNIT_1,
.ulp_mode = ADC_ULP_MODE_DISABLE,
};
adc_oneshot_new_unit(&init_config1, &adc1_handle);
adc_oneshot_chan_cfg_t config = {
.bitwidth = ADC_BITWIDTH_12,
.atten = ADC_ATTEN_DB_0};
adc_oneshot_config_channel(adc1_handle, ADC_CHANNEL_6, &config);
/* adc_cali_line_fitting_config_t calfit = {
.unit_id = ADC_UNIT_1,
.atten = ADC_ATTEN_DB_0,
.bitwidth = ADC_BITWIDTH_12
}; */
adc_cali_curve_fitting_config_t calfit = {
.unit_id = ADC_UNIT_1,
.atten = ADC_ATTEN_DB_0,
.bitwidth = ADC_BITWIDTH_12};
adc_cali_handle_t cali_handle;
// adc_cali_create_scheme_line_fitting(&calfit, &cali_handle);
adc_cali_create_scheme_curve_fitting(&calfit, &cali_handle);
int data;
while (true)
{
adc_oneshot_get_calibrated_result(adc1_handle, cali_handle,
ADC_CHANNEL_6, &data);
printf("data cal %d mV\n", data);
fflush(stdout);
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
}
Page 251 From fragement
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "hal/adc_types.h"
#include "esp_adc/adc_oneshot.h"
#include "esp_adc/adc_cali.h"
#include "esp_adc/adc_cali_scheme.h"
#include "driver/gptimer.h"
gptimer_handle_t tick_us_start(void)
{
gptimer_config_t timer_config = {
.clk_src = GPTIMER_CLK_SRC_DEFAULT,
.direction = GPTIMER_COUNT_UP,
.resolution_hz = 1000000,
};
gptimer_handle_t gptimer_us = NULL;
gptimer_new_timer(&timer_config, &gptimer_us);
gptimer_enable(gptimer_us);
gptimer_start(gptimer_us);
return gptimer_us;
}
int64_t tick_us(gptimer_handle_t gptimer_us, int64_t offset)
{
uint64_t count;
gptimer_get_raw_count(gptimer_us, &count);
return count + offset;
}
void app_main(void)
{
adc_oneshot_unit_handle_t adc1_handle;
adc_oneshot_unit_init_cfg_t init_config1 = {
.unit_id = ADC_UNIT_1,
.ulp_mode = ADC_ULP_MODE_DISABLE,
};
adc_oneshot_new_unit(&init_config1, &adc1_handle);
adc_oneshot_chan_cfg_t config = {
.bitwidth = ADC_BITWIDTH_12,
.atten = ADC_ATTEN_DB_0};
adc_oneshot_config_channel(adc1_handle, ADC_CHANNEL_6, &config);
/* adc_cali_line_fitting_config_t calfit = {
.unit_id = ADC_UNIT_1,
.atten = ADC_ATTEN_DB_0,
.bitwidth = ADC_BITWIDTH_12
}; */
adc_cali_curve_fitting_config_t calfit = {
.unit_id = ADC_UNIT_1,
.atten = ADC_ATTEN_DB_0,
.bitwidth = ADC_BITWIDTH_12};
adc_cali_handle_t cali_handle;
// adc_cali_create_scheme_line_fitting(&calfit, &cali_handle);
adc_cali_create_scheme_curve_fitting(&calfit, &cali_handle);
gptimer_handle_t timer = tick_us_start();
int data;
int64_t t = tick_us(timer, 0);
for (int i = 0; i < 100000; i++)
{
adc_oneshot_read(adc1_handle, ADC_CHANNEL_6, &data);
}
t = tick_us(timer, 0) - t;
printf("t=%lld \n", t / 100000);
}
Page 252 Note: Only works on an ESP32 or ESP32 S2
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "driver/dac_oneshot.h"
void app_main(void)
{
dac_oneshot_config_t oneshot_cfg = {
.chan_id = DAC_CHAN_1
};
dac_oneshot_handle_t DAC_handle;
dac_oneshot_new_channel(&oneshot_cfg, &DAC_handle);
uint8_t value = 0;
while (true) {
dac_oneshot_output_voltage(DAC_handle, value);
value++;
}
}
Page 254 Note: Only works on an ESP32 or ESP32 S2
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "driver/dac_oneshot.h"
#include "math.h"
uint8_t wave[256];
void app_main(void)
{
for (int i = 0; i < 256; i++)
{
wave[i] = (uint8_t)((128.0 + 127 * sinf((float)i
* 2.0 * 3.14159 / 255.0)));
}
dac_oneshot_config_t oneshot_cfg = {
.chan_id = DAC_CHAN_1
};
dac_oneshot_handle_t DAC_handle;
dac_oneshot_new_channel(&oneshot_cfg, &DAC_handle);
while (true) {
for (int i = 0;i < 256;i++) {
dac_oneshot_output_voltage(DAC_handle, wave[i]);
}
}
}
Page 255 Note: Only works on an ESP32 or ESP32 S2
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "driver/dac_oneshot.h"
#include "math.h"
uint8_t wave[256];
void app_main(void)
{
for (int i = 0; i < 256; i++)
{
wave[i] = (uint8_t)((128.0 + 127 * sinf((float)i
* 2.0 * 3.14159 / 255.0)));
}
dac_oneshot_config_t oneshot_cfg = {
.chan_id = DAC_CHAN_1
};
dac_oneshot_handle_t DAC_handle;
dac_oneshot_new_channel(&oneshot_cfg, &DAC_handle);
while (true) {
for (int i = 0;i < 256;i++) {
dac_oneshot_output_voltage(DAC_handle, wave[i]);
}
}
}
Page 259 ESP32 only
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "driver/touch_sensor.h"
void app_main(void)
{
touch_pad_init();
touch_pad_set_voltage(TOUCH_HVOLT_2V4,
TOUCH_LVOLT_0V5, TOUCH_HVOLT_ATTEN_1V);
touch_pad_config(TOUCH_PAD_NUM5, 0);
uint16_t touch_value=0;
while (true) {
touch_pad_read(TOUCH_PAD_NUM5, &touch_value);
printf("val_touch_gpio12 = %d \n", touch_value);
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
}
Page 259 ESP32 S3 only
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "driver/touch_sensor.h"
void app_main(void)
{
touch_pad_init();
touch_pad_config(TOUCH_PAD_NUM5);
touch_pad_set_fsm_mode(TOUCH_FSM_MODE_SW);
uint32_t touch_value = 0;
while (true)
{
touch_pad_sw_start();
vTaskDelay(1000 / portTICK_PERIOD_MS);
touch_pad_read_raw_data(TOUCH_PAD_NUM5, &touch_value);
printf("val_touch_gpio5 = %ld \n", touch_value);
}
}
Page 260 ESP32 only
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "driver/touch_sensor.h"
#include "driver/gpio.h"
void ISR(void *arg)
{
gpio_set_level(2, !gpio_get_level(2));
}
void app_main(void)
{
gpio_reset_pin(2);
gpio_set_direction(2, GPIO_MODE_INPUT_OUTPUT);
touch_pad_init();
touch_pad_set_voltage(TOUCH_HVOLT_2V4, TOUCH_LVOLT_0V5,
TOUCH_HVOLT_ATTEN_1V);
touch_pad_config(TOUCH_PAD_NUM5, 800);
touch_pad_set_trigger_mode(TOUCH_TRIGGER_BELOW);
touch_pad_isr_register(ISR, NULL);
touch_pad_intr_enable();
uint16_t touch_value = 0;
while (true)
{
uint32_t status = touch_pad_get_status();
touch_pad_read(TOUCH_PAD_NUM5, &touch_value);
printf("val_touch_gpio12 = %d \n", touch_value);
printf("status = %ld\n", status);
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
}
Page 262 ESP32 S3 only
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "driver/touch_sensor.h"
#include "driver/gpio.h"
void ISR(void *arg)
{
gpio_set_level(2, !gpio_get_level(2));
touch_pad_clear_status();
}
void app_main(void)
{
gpio_reset_pin(2);
gpio_set_direction(2, GPIO_MODE_INPUT_OUTPUT);
touch_pad_init();
touch_pad_config(TOUCH_PAD_NUM5);
touch_pad_set_thresh(TOUCH_PAD_NUM5, 30000);
touch_pad_set_channel_mask(1 << 5);
touch_pad_isr_register(ISR, NULL, TOUCH_PAD_INTR_MASK_ALL);
touch_pad_intr_enable(TOUCH_PAD_INTR_MASK_ACTIVE);
touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
touch_pad_fsm_start();
}
