个人写STC8G单片机+A4988的驱动步进电机程序源码 -

#include "config.h"
#include "GPIO.h"
#include "PCA.h"
#include "delay.h"
/************* 功能说明 ***************
本例程基于STC8G1K08-20PIN进行编写测试，STC8G系列芯片可通用参考.
输出3路变化的PWM信号, 类似"呼吸灯"的驱动.
PWM0 为8位PWM.
PWM1 为7位PWM.
PWM2 为10位PWM.
下载时, 选择时钟 24MHz (用户可在"config.h"修改频率).
******************************************/
/************* 本地常量声明 **************/
/************* 本地变量声明 **************/
u16 pwm0,pwm1,pwm2;
bit B_PWM0_Dir,B_PWM1_Dir,B_PWM2_Dir; //方向, 0为+, 1为-.
/************* 本地函数声明 **************/
/************* 外部函数和变量声明 *****************/
/******************** IO口配置 ********************/
void GPIO_config(void)
{
GPIO_InitTypeDef GPIO_InitStructure; //结构定义
GPIO_InitStructure.Pin = GPIO_Pin_All; //指定要初始化的IO, GPIO_Pin_0 ~ GPIO_Pin_7, 或操作
GPIO_InitStructure.Mode = GPIO_PullUp; //指定IO的输入或输出方式,GPIO_PullUp,GPIO_HighZ,GPIO_OUT_OD,GPIO_OUT_PP
GPIO_Inilize(GPIO_P1,&GPIO_InitStructure); //初始化
GPIO_InitStructure.Pin = GPIO_Pin_7; //指定要初始化的IO, GPIO_Pin_0 ~ GPIO_Pin_7, 或操作
GPIO_InitStructure.Mode = GPIO_PullUp; //指定IO的输入或输出方式,GPIO_PullUp,GPIO_HighZ,GPIO_OUT_OD,GPIO_OUT_PP
GPIO_Inilize(GPIO_P3,&GPIO_InitStructure); //初始化
}
/******************** PCA配置 ********************/
void PCA_config(void)
{
PCA_InitTypeDef PCA_InitStructure;
PCA_InitStructure.PCA_Clock = PCA_Clock_1T; //PCA_Clock_1T, PCA_Clock_2T, PCA_Clock_4T, PCA_Clock_6T, PCA_Clock_8T, PCA_Clock_12T, PCA_Clock_Timer0_OF, PCA_Clock_ECI
PCA_InitStructure.PCA_IoUse = PCA_P12_P11_P10_P37; //PCA_P12_P11_P10_P37, PCA_P34_P35_P36_P37, PCA_P24_P25_P26_P27
PCA_InitStructure.PCA_Interrupt_Mode = DISABLE; //ENABLE, DISABLE
PCA_InitStructure.PCA_Priority = Priority_0; //指定中断优先级(低到高) Priority_0,Priority_1,Priority_2,Priority_3
PCA_InitStructure.PCA_RUN = DISABLE; //ENABLE, DISABLE
PCA_Init(PCA_Counter,&PCA_InitStructure); //设置公用Counter
PCA_InitStructure.PCA_Mode = PCA_Mode_PWM; //PCA_Mode_PWM, PCA_Mode_Capture, PCA_Mode_SoftTimer, PCA_Mode_HighPulseOutput
PCA_InitStructure.PCA_PWM_Wide = PCA_PWM_8bit; //PCA_PWM_8bit, PCA_PWM_7bit, PCA_PWM_6bit, PCA_PWM_10bit
PCA_InitStructure.PCA_Interrupt_Mode = DISABLE; //PCA_Rise_Active, PCA_Fall_Active, ENABLE, DISABLE
PCA_InitStructure.PCA_Value = 128 << 8; //对于PWM,高8位为PWM占空比
PCA_Init(PCA0,&PCA_InitStructure);
PCA_InitStructure.PCA_Mode = PCA_Mode_PWM; //PCA_Mode_PWM, PCA_Mode_Capture, PCA_Mode_SoftTimer, PCA_Mode_HighPulseOutput
PCA_InitStructure.PCA_PWM_Wide = PCA_PWM_7bit; //PCA_PWM_8bit, PCA_PWM_7bit, PCA_PWM_6bit, PCA_PWM_10bit
PCA_InitStructure.PCA_Interrupt_Mode = DISABLE; //PCA_Rise_Active, PCA_Fall_Active, ENABLE, DISABLE
PCA_InitStructure.PCA_Value = 64 << 8; //对于PWM,高8位为PWM占空比
PCA_Init(PCA1,&PCA_InitStructure);
PCA_InitStructure.PCA_Mode = PCA_Mode_PWM; //PCA_Mode_PWM, PCA_Mode_Capture, PCA_Mode_SoftTimer, PCA_Mode_HighPulseOutput
PCA_InitStructure.PCA_PWM_Wide = PCA_PWM_10bit; //PCA_PWM_8bit, PCA_PWM_7bit, PCA_PWM_6bit, PCA_PWM_10bit
PCA_InitStructure.PCA_Interrupt_Mode = DISABLE; //PCA_Rise_Active, PCA_Fall_Active, ENABLE, DISABLE
PCA_InitStructure.PCA_Value = 32 << 8; //对于PWM,高8位为PWM占空比
PCA_Init(PCA2,&PCA_InitStructure);
CR = 1; //启动PCA
}
/******************** task A **************************/
void main(void)
{
GPIO_config();
PCA_config();
pwm0 = 128;
pwm1 = 64;
pwm2 = 512;
B_PWM0_Dir = 0;
B_PWM1_Dir = 0;
B_PWM2_Dir = 0;
UpdatePwm(PCA0,pwm0);
UpdatePwm(PCA1,pwm1);
UpdatePwm(PCA2,pwm2);
// EA = 1;
while (1)
{
delay_ms(20);
if(B_PWM0_Dir)
{
if(--pwm0 <= 16) B_PWM0_Dir = 0; //8位PWM
}
else if(++pwm0 >= 240) B_PWM0_Dir = 1; //8位PWM
UpdatePwm(PCA0,pwm0);
if(B_PWM1_Dir)
{
if(--pwm1 <= 8) B_PWM1_Dir = 0; //7位PWM
}
else if(++pwm1 >= 120) B_PWM1_Dir = 1; //7位PWM
UpdatePwm(PCA1,pwm1);
if(B_PWM2_Dir)
{
if(--pwm2 <= 24) B_PWM2_Dir = 0; //10位PWM
}
else if(++pwm2 >= 1000) B_PWM2_Dir = 1; //10位PWM
UpdatePwm(PCA2,pwm2);
}
}

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