[Shanghai Hangxin ACM32F070 development board + touch function evaluation board] PWM signal generator implementation and accuracy test

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[Shanghai Hangxin ACM32F070 development board + touch function evaluation board] PWM signal generator implementation and accuracy test [Copy link]

PWM信号发生器

Preface

This time, based on the timer's PWM output and segment code display, the function of a PWM generator is realized.

process

Based on LCD_TK.

Use the upper 4 digits to display the period, unit 10uS >=1.

Use the lower 4 digits to display the duty cycle, 0~100.

Use TIMER1, PC8 output.

App.c code is as follows

test

The test settings are 1*10uS and 10*10uS, and the duty cycle is 50% and 80% respectively.

Setting the cycle	Setting the Duty Cycle	Testing cycle	Test duty cycle	Cycle Error	Duty cycle error
10uS	50%	10.167uS	50%	1.67%	0
10uS	80%	10.167uS	79.5%	1.67%	0.625%
100uS	50%	100.25	50%	0.25%	0
100uS	80%	100.333uS	80.1%	0.333%	0.125%

/*

*************************************************** ****************************

* @File APP.c

* @author CWT

* @version V1.0.0

* @date 2020

* @brief LCD demo source code.

*************************************************** ****************************

*/

#include "APP.h"

#include "SHT30.h"

#include "lcd_GDC04212.h"

#include "lcd_GDC03828.h"

#include "lcd_YR1618A.h"

#include "buzzer.h"

#include "TKEY.h"

LCD_HandleTypeDef *lcdhandle; //LCD Handle

I2C_HandleTypeDef I2C_Handle; //I2C Handle

#define BUFFER_LENGTH (256)

uint8_t gu8_TxBuffer[BUFFER_LENGTH];

uint8_t gu8_RxBuffer[BUFFER_LENGTH];

uint8_t gu8_time_count_free = 0;//0-free,1-0.5s,2-1s,

uint32_t gu32_time_1s_cont = 0;

extern volatile uint32_t gu32_SystemCount;

void(*LCD_DisplayNum)(uint32_t);//LCD

void(*LCD_Init)(void);//LCD

extern void (*SysTick_Handler_Callback)(void);

extern LCD_HandleTypeDef lcdhandle_GDC04212;

extern LCD_HandleTypeDef lcdhandle_GDC03828;

extern LCD_HandleTypeDef lcdhandle_YR1618A;

TIM_HandleTypeDef TIM6_Handler;

DMA_HandleTypeDef DMA_CH1_Handle;

DMA_LLI_InitTypeDef DMA_CH1_Handle_link1;

DMA_LLI_InitTypeDef DMA_CH1_Handle_link2;

DMA_LLI_InitTypeDef DMA_CH1_Handle_link3;

DMA_LLI_InitTypeDef DMA_CH1_Handle_link4;

DMA_LLI_InitTypeDef DMA_CH1_Handle_link5;

DMA_LLI_InitTypeDef DMA_CH1_Handle_link6;

DMA_LLI_InitTypeDef DMA_CH1_Handle_link7;

DMA_LLI_InitTypeDef DMA_CH1_Handle_link8;

DMA_LLI_InitTypeDef DMA_CH1_Handle_link9;

#if defined LCD_GDC04212 //GDC042129 ·± °1111 ±-"9999"

uint32_t wdata1[16]={0x06000600,0x06000600,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

uint32_t wdata2[16]={0x0B060B06,0x0B060B06,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

uint32_t wdata3[16]={0xF020F02,0xF020F02,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

uint32_t wdata4[16]={0x06030603,0x06030603,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

uint32_t wdata5[16]={0xD030D03,0xD030D03,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

uint32_t wdata6[16]={0x0D070D07,0x0D070D07,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

uint32_t wdata7[16]={0x07000700,0x07000700,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

uint32_t wdata8[16]={0x0F070F07,0x0F070F07,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

uint32_t wdata9[16]={0xF030F03,0xF030F03,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

#elif defined LCD_GDC03828 //GDC038289 ·± °1111 ±-"9999"