Haawking DSC2803X 经验贴---数码管显示pwm频率和占空比

ti

一、说明：

作者：覃陆奥

板卡版本：HX320F28034PT

IDE版本：Haawking IDE V0.5.3

编译器版本：HK100V1

作用：28034输出pwm波，并控制移位寄存器，在四位数码管上显示频率和占空比。

第一步：配置数码管的工作模式

/******************************************************************

文件名：smg.C

参数：无

返回值：无

作用：配置数码管的工作方式

******************************************************************/

#include "smg.h"
unsigned char smgduan[16]={0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07,
0x7F, 0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71};//0~F 数码管段选数据
void SMG_Init(void)
{
EALLOW;
SysCtrlRegs.PCLKCR3.bit.GPIOINENCLK = 1;// 开启GPIO时钟
//SMG数据控制端口配置
GpioCtrlRegs.GPBMUX1.bit.GPIO32=0;
GpioCtrlRegs.GPBDIR.bit.GPIO32=1;
GpioCtrlRegs.GPBPUD.bit.GPIO32=0;

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smg.h头文件

#ifndef SMG_H_
#define SMG_H_
#include "DSC28027_Device.h" // DSP2833x 头文件
#include "DSC28027_Examples.h" // DSP2833x 例子相关头文件
//数码管位选信号线管脚定义
#define SEG1_SETH (GpioDataRegs.GPASET.bit.GPIO2=1)
#define SEG1_SETL (GpioDataRegs.GPACLEAR.bit.GPIO2=1)
#define SEG2_SETH (GpioDataRegs.GPASET.bit.GPIO3=1)
#define SEG2_SETL (GpioDataRegs.GPACLEAR.bit.GPIO3=1)
#define SEG3_SETH (GpioDataRegs.GPASET.bit.GPIO4=1)
#define SEG3_SETL (GpioDataRegs.GPACLEAR.bit.GPIO4=1)
#define SEG4_SETH (GpioDataRegs.GPASET.bit.GPIO5=1)
#define SEG4_SETL (GpioDataRegs.GPACLEAR.bit.GPIO5=1)
//74HC164时钟管脚定义
#define SPICLKA_SETH (GpioDataRegs.GPBSET.bit.GPIO32=1)
#define SPICLKA_SETL (GpioDataRegs.GPBCLEAR.bit.GPIO32=1)
//74HC164数据管脚定义
#define SPISIMOA_SETH (GpioDataRegs.GPBSET.bit.GPIO33=1)
#define SPISIMOA_SETL (GpioDataRegs.GPBCLEAR.bit.GPIO33=1)
void SMG_Init(void);
void SMG_DisplayInt(Uint16 num);
void SMG_DisplayFloat(float num,unsigned char dotnum);
#endif /* SMG_H_ */

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第二步：配置GPIO6-7为ePWM外设模式

/******************************************************************

文件名：leds.C

参数：无

返回值：无

作用：配置GPIO0-6配置的epwm输出口的寄存器配置。

******************************************************************/

void LED_Init(void)
{
EALLOW;
SysCtrlRegs.PCLKCR3.bit.GPIOINENCLK = 1;// 开启GPIO时钟
//LED1端口配置
//GpioCtrlRegs.GPAMUX1.bit.GPIO0=0;//设置为通用GPIO功能
//GpioCtrlRegs.GPADIR.bit.GPIO0=1;//设置GPIO方向为输出
//GpioCtrlRegs.GPAPUD.bit.GPIO0=0;//使能GPIO上拉电阻
//LED2端口配置
//GpioCtrlRegs.GPAMUX1.bit.GPIO1=0;
//GpioCtrlRegs.GPADIR.bit.GPIO1=1;
//GpioCtrlRegs.GPAPUD.bit.GPIO1=0;
//LED3端口配置
//GpioCtrlRegs.GPAMUX1.bit.GPIO2=0;
//GpioCtrlRegs.GPADIR.bit.GPIO2=1;
//GpioCtrlRegs.GPAPUD.bit.GPIO2=0;
//LED4端口配置
//GpioCtrlRegs.GPAMUX1.bit.GPIO3=0;
//GpioCtrlRegs.GPADIR.bit.GPIO3=1;
//GpioCtrlRegs.GPAPUD.bit.GPIO3=0;
//LED5端口配置
//GpioCtrlRegs.GPAMUX1.bit.GPIO4=0;
//GpioCtrlRegs.GPADIR.bit.GPIO4=1;
//GpioCtrlRegs.GPAPUD.bit.GPIO4=0;
//LED6端口配置
GpioCtrlRegs.GPAMUX1.bit.GPIO0=0;
GpioCtrlRegs.GPADIR.bit.GPIO0=1;
GpioCtrlRegs.GPAPUD.bit.GPIO0=0;
//LED7端口配置
GpioCtrlRegs.GPAMUX1.bit.GPIO1=0;
GpioCtrlRegs.GPADIR.bit.GPIO1=1;
GpioCtrlRegs.GPAPUD.bit.GPIO1=0;
//LED8端口配置
GpioCtrlRegs.GPAMUX1.bit.GPIO12=0;
GpioCtrlRegs.GPADIR.bit.GPIO12=1;
GpioCtrlRegs.GPAPUD.bit.GPIO12=0;
//LED9端口配置
GpioCtrlRegs.GPAMUX2.bit.GPIO16=0;
GpioCtrlRegs.GPADIR.bit.GPIO16=1;
GpioCtrlRegs.GPAPUD.bit.GPIO16=0;
//GpioDataRegs.GPASET.bit.GPIO0=1;
//GpioDataRegs.GPASET.bit.GPIO1=1;
//GpioDataRegs.GPASET.bit.GPIO2=1;
//GpioDataRegs.GPASET.bit.GPIO3=1;
//GpioDataRegs.GPASET.bit.GPIO4=1;
GpioDataRegs.GPASET.bit.GPIO6=1;
GpioDataRegs.GPASET.bit.GPIO7=1;
GpioDataRegs.GPASET.bit.GPIO12=1;
GpioDataRegs.GPASET.bit.GPIO16=1;
EDIS;
}

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leds.h头文件

#ifndef _LEDS_H_
#define _LEDS_H_
#include "DSC28027_Device.h" // DSP2833x 头文件
#include "DSC28027_Examples.h" // DSP2833x 例子相关头文件
//#define LED1_OFF (GpioDataRegs.GPASET.bit.GPIO0=1)
//#define LED1_ON (GpioDataRegs.GPACLEAR.bit.GPIO0=1)
//#define LED1_TOGGLE (GpioDataRegs.GPATOGGLE.bit.GPIO0=1)
//#define LED2_OFF (GpioDataRegs.GPASET.bit.GPIO1=1)
//#define LED2_ON (GpioDataRegs.GPACLEAR.bit.GPIO1=1)
//#define LED2_TOGGLE (GpioDataRegs.GPATOGGLE.bit.GPIO1=1)
//#define LED3_OFF (GpioDataRegs.GPASET.bit.GPIO2=1)
//#define LED3_ON (GpioDataRegs.GPACLEAR.bit.GPIO2=1)
//#define LED3_TOGGLE (GpioDataRegs.GPATOGGLE.bit.GPIO2=1)
//#define LED4_OFF (GpioDataRegs.GPASET.bit.GPIO3=1)
//#define LED4_ON (GpioDataRegs.GPACLEAR.bit.GPIO3=1)
//#define LED4_TOGGLE (GpioDataRegs.GPATOGGLE.bit.GPIO3=1)
//#define LED5_OFF (GpioDataRegs.GPASET.bit.GPIO4=1)
//#define LED5_ON (GpioDataRegs.GPACLEAR.bit.GPIO4=1)
//#define LED5_TOGGLE (GpioDataRegs.GPATOGGLE.bit.GPIO4=1)
#define LED6_OFF (GpioDataRegs.GPASET.bit.GPIO0=1)
#define LED6_ON (GpioDataRegs.GPACLEAR.bit.GPIO0=1)
#define LED6_TOGGLE (GpioDataRegs.GPATOGGLE.bit.GPIO0=1)
#define LED7_OFF (GpioDataRegs.GPASET.bit.GPIO1=1)
#define LED7_ON (GpioDataRegs.GPACLEAR.bit.GPIO1=1)
#define LED7_TOGGLE (GpioDataRegs.GPATOGGLE.bit.GPIO1=1)
#define LED8_OFF (GpioDataRegs.GPASET.bit.GPIO12=1)
#define LED8_ON (GpioDataRegs.GPACLEAR.bit.GPIO12=1)
#define LED8_TOGGLE (GpioDataRegs.GPATOGGLE.bit.GPIO12=1)
#define LED9_OFF (GpioDataRegs.GPASET.bit.GPIO16=1)
#define LED9_ON (GpioDataRegs.GPACLEAR.bit.GPIO16=1)
#define LED9_TOGGLE (GpioDataRegs.GPATOGGLE.bit.GPIO16=1)
void LED_Init(void);
#endif /* LED_H_ */

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第三步：配置定时中断

/******************************************************************

文件名：time.C

参数：无

返回值：无

作用：初始化定时器，设定计数器初始化。

******************************************************************/

#include "time.h"
#include "leds.h"
void TIM0_Init(float Freq, float Period)
{
EALLOW;
SysCtrlRegs.PCLKCR3.bit.CPUTIMER0ENCLK = 1; // CPU Timer 0
EDIS;
EALLOW;
PieVectTable.TINT0 = &TIM0_IRQn;
EDIS;
// CPU Timer 0
// Initialize address pointers to respective timer registers:
CpuTimer0.RegsAddr = &CpuTimer0Regs;
// Initialize timer period to maximum:
CpuTimer0Regs.PRD.all = 0xFFFFFFFF;
// Initialize pre-scale counter to divide by 1 (SYSCLKOUT):
CpuTimer0Regs.TPR.all = 0;
// Make sure timer is stopped:
CpuTimer0Regs.TCR.bit.TSS = 1;
// Reload all counter register with period value:
CpuTimer0Regs.TCR.bit.TRB = 1;
// Reset interrupt counters:
CpuTimer0.InterruptCount = 0;
ConfigCpuTimer(&CpuTimer0, Freq, Period);
CpuTimer0Regs.TCR.bit.TSS=0;
IER_DISABLE(0x0001);
PieCtrlRegs.PIEIER1.bit.INTx7 = 1;
EINT;
ERTM;
}
INTERRUPT void TIM0_IRQn(void)
{
EALLOW;
LED6_TOGGLE;
PieCtrlRegs.PIEACK.bit.ACK1=1;
EDIS;
}
void TIM1_Init(float Freq, float Period)
{
EALLOW;
SysCtrlRegs.PCLKCR3.bit.CPUTIMER1ENCLK = 1; // CPU Timer 1
EDIS;
EALLOW;
PieVectTable.XINT1 = &TIM1_IRQn;
EDIS;
// Initialize address pointers to respective timer registers:
CpuTimer1.RegsAddr = &CpuTimer1Regs;
// Initialize timer period to maximum:
CpuTimer1Regs.PRD.all = 0xFFFFFFFF;
// Initialize pre-scale counter to divide by 1 (SYSCLKOUT):
CpuTimer1Regs.TPR.all = 0;
// Make sure timers are stopped:
CpuTimer1Regs.TCR.bit.TSS = 1;
// Reload all counter register with period value:
CpuTimer1Regs.TCR.bit.TRB = 1;
// Reset interrupt counters:
CpuTimer1.InterruptCount = 0;
ConfigCpuTimer(&CpuTimer1, Freq, Period);
CpuTimer1Regs.TCR.bit.TSS=0;
IER_DISABLE(0x1000);
EINT;
ERTM;
}
INTERRUPT void TIM1_IRQn(void)
{
EALLOW;
LED7_TOGGLE;
EDIS;
}
void TIM2_Init(float Freq, float Period)
{
EALLOW;
SysCtrlRegs.PCLKCR3.bit.CPUTIMER2ENCLK = 1; // CPU Timer 2
EDIS;
EALLOW;
PieVectTable.TINT2 = &TIM2_IRQn;
EDIS;
// Initialize address pointers to respective timer registers:
CpuTimer2.RegsAddr = &CpuTimer2Regs;
// Initialize timer period to maximum:
CpuTimer2Regs.PRD.all = 0xFFFFFFFF;
// Initialize pre-scale counter to divide by 1 (SYSCLKOUT):
CpuTimer2Regs.TPR.all = 0;
// Make sure timers are stopped:
CpuTimer2Regs.TCR.bit.TSS = 1;
// Reload all counter register with period value:
CpuTimer2Regs.TCR.bit.TRB = 1;
// Reset interrupt counters:
CpuTimer2.InterruptCount = 0;
ConfigCpuTimer(&CpuTimer2, Freq, Period);
CpuTimer2Regs.TCR.bit.TSS=0;
IER_DISABLE(0x1000);
EINT;
ERTM;
}
INTERRUPT void TIM2_IRQn(void)
{
EALLOW;
LED8_TOGGLE;
EDIS;
}

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time.h头文件

#ifndef TIME_H_
#define TIME_H_
#include "DSC28027_Device.h" // DSP2833x 头文件
#include "DSC28027_Examples.h" // DSP2833x 例子相关头文件
void TIM0_Init(float Freq, float Period);
INTERRUPT void TIM0_IRQn(void);
void TIM1_Init(float Freq, float Period);
INTERRUPT void TIM1_IRQn(void);
void TIM2_Init(float Freq, float Period);
INTERRUPT void TIM2_IRQn(void);
#endif /* TIME_H_ */

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第四步：配置主程序文件。

/******************************************************************

文件名：main.C

参数：无

返回值：无

作用：设置pwm波的配置，调用pwm寄存器的值给数码管模块，实现所有函数的调用。

******************************************************************/

void Epwm4Init(void);
void EpwmGpioInt(void);

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数码管模块原理图

数码管连接图

频率显示

占空比显示

本实验源代码：链接：https://pan.baidu.com/s/1HlhnCOU1Tevzi6H6IKilxg

提取码：1111

覃陆奥 · 2021-10-2 20:52:34

仿真结果：https://www.bilibili.com/video/B ... id_from=333.999.0.0

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Haawking DSC2803X 经验贴---数码管显示pwm频率和占空比

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