分析
此次賽題圍繞兩個方向，結構如下：
代碼：
1.主函式模塊
main.c
#include <stm32f10x.h>
#include "lcd.h"
#include "adc.h"
#include "lcd_window.h"
#include "pwm.h"
#include "key.h"
#include "led.h"
float ADC_Value;
/******PWM********/
float CH1_duty=0.1,CH2_duty=0.1;
u8 channel_1_flag,channel_2_flag;
/*************************/
u8 setting_mode=0; //0 AUTO 1 MANU
u8 Data_Para=0; //0 Data 1 Para
int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
SysTick_Config(SystemCoreClock/1000);
STM3210B_LCD_Init();
LCD_Clear(Black);
LCD_SetBackColor(Black);
LCD_SetTextColor(White);
adc_Init();
pwm_Init();
KEY_Init();
LED_Init();
while(1)
{
lcd_window();
KEY_Control();
LED_Control();
}
}
在這里插入代碼片
2.ADC模塊
adc.c
#include <stm32f10x.h>
#include "adc.h"
void adc_Init(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable ADC1 and GPIOC clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB, ENABLE);
/* Configure PC.04 (ADC Channel14) as analog input -------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channel14 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 1, ADC_SampleTime_13Cycles5);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable ADC1 reset calibration register */
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));
/* Start ADC1 Software Conversion */
//ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}
float ADC_GetValue(void)
{
float ADC_V;
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
while(ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC)==RESET);
ADC_V=ADC_GetConversionValue(ADC1)*3.30/0xfff;
return ADC_V;
}
在這里插入代碼片
ADC.h
#ifndef __ADC_H
#define __ADC_H
void adc_Init(void);
float ADC_GetValue(void);
#endif
在這里插入代碼片
3.按鍵模塊
key.c
#include "stm32f10x.h"
#include "stm32f10x_it.h"
#include "key.h"
#include "lcd.h"
extern u8 setting_mode; //0錕斤拷示AUTO 1錕斤拷示MANU
extern u8 Data_Para; //0錕斤拷示Data頁錕斤拷 1錕斤拷示Para頁錕斤拷
extern float CH1_duty,CH2_duty;
float ch1_duty_1=0.1,ch2_duty_1=0.1;
u8 key1_sum,key2_sum,key3_sum,key4_sum;
void KEY_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIOA and GPIOB clock */
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void KEY_Control(void)
{
if(KEY1==0)
{
delay_ms(10);
if(KEY1==0)
{ key1_sum++;
LCD_ClearLine(Line0);
LCD_ClearLine(Line1);
LCD_ClearLine(Line2);
LCD_ClearLine(Line3);
LCD_ClearLine(Line4);
LCD_ClearLine(Line5);
LCD_ClearLine(Line6);
LCD_ClearLine(Line7);
LCD_ClearLine(Line8);
LCD_ClearLine(Line9);
}
if(key1_sum==1)
{
if(setting_mode==1)
{
Data_Para^=1;
}
else
{
Data_Para=0;
}
}
}
else
{
key1_sum=0;
}
if(KEY2==0)
{
delay_ms(10);
if(KEY2==0)
{
key2_sum++;
if(key2_sum==1)
{
if(setting_mode==1)
{
ch1_duty_1+=0.1;
if((ch1_duty_1-1.0)>=0)
{
ch1_duty_1=0.1;
}
}
}
}
}
else
{
key2_sum=0;
}
if(KEY3==0)
{
delay_ms(10);
if(KEY3==0)
{ key3_sum++;
if(key3_sum==1)
{
if(setting_mode==1)
{
ch2_duty_1+=0.1;
if((ch2_duty_1-1.0)>=0)
{
ch2_duty_1=0.1;
}
}
}
}
}
else
{
key3_sum=0;
}
if(KEY4==0)
{
delay_ms(10);
if(KEY4==0)
{
key4_sum++;
if(key4_sum==1)
{
setting_mode^=1;
}
}
}
else
{
key4_sum=0;
}
}
這里的按鍵模塊我覺得是一個很好的按鍵消抖方法（是參照那些前輩們這樣寫的），
key.h
#ifndef __KEY_H
#define __KEY_H
#include "stm32f10x.h"
#define KEY1 GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0)
#define KEY2 GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_8)
#define KEY3 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1)
#define KEY4 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_2)
void KEY_Init(void);
void KEY_Control(void);
#endif
在這里插入代碼片
4.LED模塊
#include "stm32f10x.h"
#include "led.h"
extern u8 setting_mode;
extern u8 Data_Para;
void LED_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIOA and GPIOB clock */
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = LED1|LED2|LED3|LED4|LED5|LED6|LED7|LED8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_2;
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
void LED_Status(uint16_t LED,u8 state)
{
// GPIO_Write(GPIOC,0Xff00); //全滅
// GPIO_SetBits(GPIOD,GPIO_Pin_2);//
// GPIO_ResetBits(GPIOD,GPIO_Pin_2);
if(state) //on
{
GPIO_ResetBits(GPIOC,LED);
GPIO_SetBits(GPIOD,GPIO_Pin_2);//
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
}
else
{
GPIO_SetBits(GPIOC,LED);
GPIO_SetBits(GPIOD,GPIO_Pin_2);//
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
}
}
void LED_Control(void)
{
GPIO_Write(GPIOC,0Xff00); //全滅
GPIO_SetBits(GPIOD,GPIO_Pin_2);// 此處需要特別注意，應該在這里添加這三行代碼
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
if(setting_mode==1)
{
LED_Status(LED1,0);
}
if(setting_mode==0)
{
LED_Status(LED1,1);
}
if(Data_Para==0)
{
LED_Status(LED2,1);
}
else
{
LED_Status(LED2,0);
}
}
LED.H
#ifndef __LED_H
#define __LED_H
#include "stm32f10x.h"
#define LED1 GPIO_Pin_8
#define LED2 GPIO_Pin_9
#define LED3 GPIO_Pin_10
#define LED4 GPIO_Pin_11
#define LED5 GPIO_Pin_12
#define LED6 GPIO_Pin_13
#define LED7 GPIO_Pin_14
#define LED8 GPIO_Pin_15
void LED_Init(void);
void LED_Status(uint16_t LED,u8 state);
void LED_Control(void);
#endif
5.pwm模塊
pwm.c
#include <stm32f10x.h>
#include "pwm.h"
/******功能介紹****/
/*
該PWM函式是在同一定時器下的不同通道可以產生不同的頻率，同時產生不同的占空比；
可以配合按鍵進行占空比修改和頻率進行修改，
*/
/******PWM引數設定********/
extern float CH1_duty,CH2_duty;
extern u8 channel_1_flag,channel_2_flag;
/*************************/
__IO uint16_t CCR1_Val =10000; //72000000/72/100 ---100HZ
__IO uint16_t CCR2_Val =5000; //72000000/72/200 ---200HZ
void pwm_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* TIM3 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
/* GPIOA and GPIOA clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE); //注意要是能復用時鐘
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //復用推挽輸出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 65535;
TIM_TimeBaseStructure.TIM_Prescaler = 72-1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
/* Enable the TIM3 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* PWM1 Mode configuration: Channel1 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; //記住
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OC1Init(TIM3, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Disable);
/* PWM1 Mode configuration: Channel2 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR2_Val;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OC2Init(TIM3, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Disable);
/* TIM enable counter */
TIM_Cmd(TIM3, ENABLE);
/* Enable the CC2 Interrupt Request */
TIM_ITConfig(TIM3, TIM_IT_CC2|TIM_IT_CC1, ENABLE);
TIM_SetCounter(TIM3,0x0);
TIM_SetCompare2(TIM3,0x0);
TIM_SetCompare3(TIM3,0x0);
}
void TIM3_IRQHandler(void)
{
u16 capture; //注意這里時u16,之前用得是u8不行，
if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET)
{
TIM_ClearITPendingBit(TIM3, TIM_IT_CC1);
capture = TIM_GetCapture1(TIM3);
if(channel_1_flag)
{
TIM_SetCompare1(TIM3, capture + (u16)CCR1_Val*CH1_duty);
}
else
{
TIM_SetCompare1(TIM3, capture + (u16)CCR1_Val*(1-CH1_duty));
}
channel_1_flag^=1;
}
if (TIM_GetITStatus(TIM3, TIM_IT_CC2) != RESET)
{
TIM_ClearITPendingBit(TIM3, TIM_IT_CC2);
capture = TIM_GetCapture2(TIM3);
if(channel_2_flag)
{
TIM_SetCompare2(TIM3, (u16)(capture + CCR2_Val*CH2_duty));
}
else
{
TIM_SetCompare2(TIM3, (u16)(capture + CCR2_Val*(1-CH2_duty)));
}
channel_2_flag^=1;
}
}
在這里插入代碼片
該方法既可以調節占空比，也可以調節頻率，題目要求只需調節占空比即可，同時有個地方注意一下： CH1_duty,CH2_duty這里我定義的是用float型來表示占空比，這樣CH1_duty,CH2_duty直接就是小數，而當我把CH1_duty,CH2_duty，定義為u16時，用CH1_duty/100,CH2_duty/100來表示占空比時，PWM就無法正常輸出，
pwm.h
#ifndef __PWM_H
#define __PWM_H
void pwm_Init(void);
#endif
結果
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標籤：其他