ESP32 Partical
来自Jack's Lab
目录 |
1 Overview
Sharp GP2Y1010AU0F partical sensor
2 Connections
Sharp pin 1 (V-LED) => 150ohm resister => Quantum_VIN_3V3 Sharp pin 2 (LED-GND) => Quantum_GND Sharp pin 3 (LED) => Quantum_D8_IO22 Sharp pin 4 (S-GND) => Quantum_GND Sharp pin 5 (Vo) => Quantum_I36 Sharp pin 6 (Vcc) => Quantum_VIN_3V3
3 Schemmatics
4 Quick Start
4.1 Build
$ sudo apt-get install git wget make libncurses-dev flex bison gperf python python-serial $ wget https://dl.espressif.com/dl/xtensa-esp32-elf-linux32-1.22.0-59.tar.gz $ mkdir -p toolchain $ tar zxf xtensa-esp32-elf-linux32-1.22.0-59.tar.gz -C toolchain $ export PATH=$PATH:`pwd`/toolchain/xtensa-esp32-elf/bin $ $ git clone --recursive git://github.com/icamgo/esp-idf.git $ export IDF_PATH=`pwd`/esp-idf $ cd esp-idf/examples/11_sharp_dust $ make menuconfig $ make -j2
4.2 Upload
$ make flash
You need to press the RST buttom after uploading the firmware into flash. If you guys do not like to do this please patch the /path/to/esp-idf/components/esptool_py/esptool/esptool.py :
diff --git a/esptool.py b/esptool.py index 755f4cb..ff92c91 100755 --- a/esptool.py +++ b/esptool.py @@ -197,6 +197,12 @@ class ESPLoader(object): + '\xc0' self._port.write(buf) + def reset_to_app(self): + self._port.setDTR(False) + self._port.setRTS(True) + time.sleep(0.05) + self._port.setRTS(True) + """ Calculate checksum of a blob, as it is defined by the ROM """ @staticmethod def checksum(data, state=ESP_CHECKSUM_MAGIC): @@ -1421,7 +1427,6 @@ def dump_mem(esp, args): sys.stdout.flush() print 'Done!' - def write_flash(esp, args): """Write data to flash """ @@ -1503,6 +1508,7 @@ def write_flash(esp, args): if args.verify: print 'Verifying just-written flash...' verify_flash(esp, args, header_block) + esp.reset_to_app() def image_info(args):
Then Quantum can reset to run your app automatically after uploading the firmware into flash
4.3 Checking Output
$ picocom -b 115200 /dev/ttyUSB0 ...... ......
5 Code Example
#include <stdio.h> #include <stdlib.h> #include "freertos/FreeRTOS.h" #include "freertos/task.h" #include "soc/rtc_io_reg.h" #include "esp_system.h" #include "nvs_flash.h" #include "driver/gpio.h" enum adc1_pad { ADC1_GPIO36 = 0, ADC1_GPIO37, ADC1_GPIO38, ADC1_GPIO39, ADC1_GPIO32, ADC1_GPIO33, ADC1_GPIO34, ADC1_GPIO35 }; enum adc1_atten { ADC1_ATTEN_0DB = 0, ADC1_ATTEN_3DB, ADC1_ATTEN_6DB, ADC1_ATTEN_12DB }; uint32_t adc1_read(enum adc1_pad pad, enum adc1_atten att); /* * Read the amp adc, IO36 as the ADC_PRE_AMP * make sure connecting a 270pF cap from * esp32_pin5 to esp32_pin6 */ uint32_t adc1_amp_read(); inline void delay_ms(int ms) { vTaskDelay(ms / portTICK_PERIOD_MS); } inline void delay_us(int us) { ets_delay_us(us); } void sharp_init() { /* * Configure the IOMUX register for GPIO 22 (some pads are * muxed to GPIO on reset already, but some default to other * functions and need to be switched to GPIO. Consult the * Technical Reference for a list of pads and their default * functions.) */ gpio_pad_select_gpio(22); /* Set the GPIO as a push/pull output */ gpio_set_direction(22, GPIO_MODE_OUTPUT); /* power off the led of partical sensor */ gpio_set_level(22, 1); } int get_sharp() { uint32_t dust_val = 0; gpio_set_level(22, 0); // power on the LED delay_us(280); // read the dust value via ADC1 GPIO35 pin dust_val = adc1_read(ADC1_GPIO35, ADC1_ATTEN_6DB); delay_us(40); gpio_set_level(22, 1); // turn the LED off delay_us(9680); return dust_val; } void read_partical_task(void *pvParameters) { while (1) { printf("Partical value = %d\n", get_sharp()); vTaskDelay(8000 / portTICK_PERIOD_MS); } } void app_main() { nvs_flash_init(); sharp_init(); printf("Welcome to Noduino Quantum\r\n"); printf("Sharp GP2Y1010AU0F Particle Sensor Example... \r\n"); xTaskCreatePinnedToCore(&read_partical_task, "read_partical_task", 1024, NULL, 5, NULL, 0); }
6 Reference
- For more information please refer to