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adc: change the way data is formattted in adc_dma_demo

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The way the adc_dma_demo data was formatted caused it go get parsed as markdown syntax.

Changed it be more "human" readable as well as put all ADC examples in a common folder
This commit is contained in:
Marius Vikhammer
2020-12-28 11:25:18 +08:00
committed by bot
parent 4e6e34e3ad
commit 3fd37d0b59
18 changed files with 2 additions and 57 deletions
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69
examples/peripherals/adc/adc2/main/adc2_example_main.c Normal file
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@@ -0,0 +1,69 @@
/* ADC2 Example
This example code is in the Public Domain (or CC0 licensed, at your option.)
Unless required by applicable law or agreed to in writing, this
software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
CONDITIONS OF ANY KIND, either express or implied.
*/
#include <stdio.h>
#include <stdlib.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "driver/gpio.h"
#include "driver/adc.h"
#include "driver/dac.h"
#include "esp_system.h"
#define DAC_EXAMPLE_CHANNEL CONFIG_EXAMPLE_DAC_CHANNEL
#define ADC2_EXAMPLE_CHANNEL CONFIG_EXAMPLE_ADC2_CHANNEL
#if CONFIG_IDF_TARGET_ESP32
static const adc_bits_width_t width = ADC_WIDTH_BIT_12;
#elif CONFIG_IDF_TARGET_ESP32S2
static const adc_bits_width_t width = ADC_WIDTH_BIT_13;
#endif
void app_main(void)
{
uint8_t output_data=0;
int read_raw;
esp_err_t r;
gpio_num_t adc_gpio_num, dac_gpio_num;
r = adc2_pad_get_io_num( ADC2_EXAMPLE_CHANNEL, &adc_gpio_num );
assert( r == ESP_OK );
r = dac_pad_get_io_num( DAC_EXAMPLE_CHANNEL, &dac_gpio_num );
assert( r == ESP_OK );
printf("ADC2 channel %d @ GPIO %d, DAC channel %d @ GPIO %d.\n", ADC2_EXAMPLE_CHANNEL, adc_gpio_num,
DAC_EXAMPLE_CHANNEL + 1, dac_gpio_num );
dac_output_enable( DAC_EXAMPLE_CHANNEL );
//be sure to do the init before using adc2.
printf("adc2_init...\n");
adc2_config_channel_atten( ADC2_EXAMPLE_CHANNEL, ADC_ATTEN_11db );
vTaskDelay(2 * portTICK_PERIOD_MS);
printf("start conversion.\n");
while(1) {
dac_output_voltage( DAC_EXAMPLE_CHANNEL, output_data++ );
r = adc2_get_raw( ADC2_EXAMPLE_CHANNEL, width, &read_raw);
if ( r == ESP_OK ) {
printf("%d: %d\n", output_data, read_raw );
} else if ( r == ESP_ERR_INVALID_STATE ) {
printf("%s: ADC2 not initialized yet.\n", esp_err_to_name(r));
} else if ( r == ESP_ERR_TIMEOUT ) {
//This can not happen in this example. But if WiFi is in use, such error code could be returned.
printf("%s: ADC2 is in use by Wi-Fi.\n", esp_err_to_name(r));
} else {
printf("%s\n", esp_err_to_name(r));
}
vTaskDelay( 2 * portTICK_PERIOD_MS );
}
}