Use and source of sharp gp2y1010au0f dust sensor under STM32 platform

The gp2y1010au0f sensor is wired as follows:

Using PA0 to receive the analog signal, the PB1 sends a pulse signal.

The code is as follows:

Gp2y.c

#include   "GP2Y.h" #include   "system.h" u16 ad_pm;void gp2yinit (void) { //define variables      adc_inittypedef a_initstructure;    gpio_inittypedef g_initstructure ;//pa0    gpio_inittypedef gpio_initstructure;//pb1    rcc_ Apb2periphclockcmd (rcc_apb2periph_gpioa | rcc_apb2periph_adc1 , enable )    //enable ADC2 channel clock           rcc_adcclkconfig (RCC_PCLK2_DIV6)    //set ADC divide factor 6 72m/6=12, ADC maximum time cannot exceed 14m     //pa0  as analog channel input pin                               g_initstructure.gpio_pin = gpio_pin_0;    g_initstructure.gpio _mode = gpio_mode_ain; //analog Input pin     gpio_init (gpioa, &G_initstructure);        adc_deinit (ADC1);   //reset ADC1, Peripherals  ADC1 All registers of   are set to default values        a_initstructure.adc_mode = adc_mode_ INDEPENDENT; //ADC working mode: ADC1 and ADC2 work in standalone mode     a_initstructure.adc_scanconvmode =  disable; //analog-to-digital conversion works in single-channel mode     A_InitStructure.ADC_ContinuousConvMode =  disable; //analog-to-digital conversion works in a single conversion mode     A_INITSTRUCTURE.ADC_EXTERNALTRIGCONV = ADC_ externaltrigconv_none; //conversion triggered by software instead of externally     A_InitStructure.ADC_DataAlign =  ADC_DATAALIGN_RIGHT; //ADC Data right-justified     A_InitStructure.ADC_NbrOfChannel = 1;  //number of ADC channels     adc_init (adc1, &a_initstructure) for sequential rules conversion;  //according to Adc_ The parameters specified in the Initstruct initialize the registers of the peripheral adcx             adc_cmd ( adc1, enable);         //enables the Adc1    adc_resetcalibration (ADC1) to be specified;  Enable Reset Calibration      while (adc_getresetcalibrationstatus (ADC1))  //wait for reset calibration End      adc_startcalibration (ADC1);   //turn on ad calibration     while (ADC_ Getcalibrationstatus (ADC1))   //wait for calibration to end     gpio_initstructure.gpio_pin =  GPIO_Pin_1;                      gpio_initstructure.gpio_mode = gpio_mode_out_pp;//push-Pull output        Gpio_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;                gpio_init (gpiob, &gpio_initstructure);     gp2y_high;} void getgp2y (void) {float pm; Gp2y_low;delay_us (280); AD_PM = GET_ADC (ADC_CHANNEL_0);//pa0delay_us (40);Gp2y_high;delay_us (9680);p m = 0.17*ad_pm-0.1; //voltage-Dust conversion printf ("%f\n", PM);} 

GP2Y.h

#ifndef __gp2y_h#define __gp2y_h#include "stm32f10x_lib.h" #define Gp2y_high gpio_setbits (gpiob,gpio_pin_1); #define Gp2y_low gpio_resetbits (gpiob,gpio_pin_1); void gp2yinit (void); void getgp2y (void); #endif

PB1 Output Waveform

Gets the dust value.

Use and source of sharp gp2y1010au0f dust sensor under STM32 platform