嵌入式系统设计课设报告(23400字)

发表于:2016.9.25来自:www.ttfanwen.com字数:23400 手机看范文

福州大学

嵌入式系统设计课设》

报告书

题 目: 基于28027的虚拟系统

姓 名:

学 号:

学 院: 电气工程与自动化学院

专 业: 电气工程与自动化

年 级:

起讫日期:

指导教师:

目 录

1、课程设计目的 ............................................................................................................................ 1

2、课程设计题目和实现目标 ........................................................................................................ 1

3、设计方案..................................................................................................................1

4、程序流程图..............................................................................................................1

5、程序代码..................................................................................................................1

6、调试总结 ................................................................................................................................. 1

7、设计心得体会..........................................................................................................1

8、参考文献..................................................................................................................1

1

1、课程设计目的

嵌入式系统设计课设》是与《嵌入式系统设计》课程相配套的实践教学环节。《嵌入式系统设计》是一门实践性很强的专业基础课,通过课程设计,达到进一步理解嵌入式芯片的硬件、软件和综合应用方面的知识,培养实践能力和综合应用能力,开拓学习积极性、主动性,学会灵活运用已经学过的知识,并能不断接受新的知识。培养大胆发明创造的设计理念,为今后就业打下良好的基础。

通过课程设计,掌握以下知识和技能:

1. 嵌入式应用系统的总体方案的设计;

2. 嵌入式应用系统的硬件设计;

3. 嵌入式应用系统的软件程序设计;

4. 嵌入式开发系统的应用和调试能力

2、课程设计题目和实现目标

课程设计题目:基于28027的虚拟系统

任务要求:

A、 利用28027的片上温度传感器,检测当前温度;

B、 通过PWM过零中断作为温度检测A/D的触发,在PWM中断时

完成温度采样和下一周期PWM占空比的修正;PWM频率为1K;

C、 利用按键作为温度给定;温度给定变化从10度到40度。

D、 当检测温度超过给定时,PWM占空比增减小(减小幅度自己设

定);当检测温度小于给定时,PWM占空比增大(增大幅度自己

设定);

E、 把PWM输出接到捕获口,利用捕获口测量当前PWM的占空比;

F、 把E测量的PWM占空比通过串口通信发送给上位机;

3、设计方案-----介绍系统实现方案和系统原理图

①系统实现方案:

任务A:利用ADC模块通道A5获取当前环境温度。

任务B:PWM过零触发ADC模块,在PWM中断服务函数中,将当前环境温度和按键设定温度进行比较,并按照任务D的要求修订PWM占空比。 2

PWM频率为1K HZ:

根据关系式:TBCLK=SYSCLKOUT/(HSPCLKDIV*CLKDIV)

取SYSCLKOUT=60M HZ,HSPCLKDIV=6,CLKDIV=1,求得

TBCLK=10M HZ。将period设为10K,便得到1K HZ 的PWM波。

任务C:用KEY模块的中断实现温度给定。

任务D:在PWM的周期结束产生的中断中,通过改变比较点CMPA的位置来改变PWM占空比的大小。

任务E:利用CAP模块设置3个捕获点捕获PWM的上升沿和下降沿,计算得到PWM波的占空比。

任务F:利用SCI模块实现串口通信将温度和占空比上传到上位机。 此外,各模块的配置都与GPIO模块有关。

②系统原理图:28027 C2000 Piccolo Launchpad原理图

嵌入式系统设计课设报告

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嵌入式系统设计课设报告

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嵌入式系统设计课设报告

4、程序流程--------各个模块的流程图

嵌入式系统设计课设报告

5、程序代码

嵌入式系统设计课设报告

①/*app.c*/

// the includes

#include "Application/app.h"

//

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

// the defines

5

//

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

// the globals

//

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

// the functions

void delay(uint32_t time)

{

while(time--);

}

//延时函数

// end of file

②/*isr.c*/

// the includes

#include "Application/isr.h"

//

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

// the defines

//

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

// the globals

//

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

// the functions

interrupt void LED_PWM_isr(void) //PWM的中断服务函数 {

if(MY_ADC<SET_TEMP) //环境检测温度小于设定温度时 6

{

mycmp-=100*(SET_TEMP-MY_ADC); //PWM占空比增大

}

else

{

mycmp+=100*(MY_ADC-SET_TEMP); //环境检测温度大于设定温度 // PWM占空比减小

}

PWM_setCmpA(myPwm1,mycmp); //设定CmpA值

PWM_clearIntFlag(myPwm1); //清零PWM中断标志位

PIE_clearInt(myPie,PIE_GroupNumber_3); //清零PIE中断标志位 mycmp=5000; //将比较点初值设为5000 }

interrupt void MY_ADC_isr(void) //ADC中断服务函数

{ MY_ADC=ADC_readResult(myAdc,ADC_ResultNumber_0);

//获取ADC转换的数字量

MY_ADC= ADC_getTemperatureC(myAdc, MY_ADC);

//将数字量转换为温度值

ADC_clearIntFlag(myAdc, ADC_IntNumber_1);

//清除中断标志位

PIE_clearInt(myPie,PIE_GroupNumber_10);

}

interrupt void KEY_xint1_isr(void) //按键中断服务函数

{

SET_TEMP++;

if(SET_TEMP>40)

{

SET_TEMP=10;

}

PIE_clearInt(myPie,PIE_GroupNumber_1);

}

interrupt void MY_CAP_isr(void) //CAP中断服务函数

{

uint32_t CapEvent1Count=0,CapEvent2Count=0,CapEvent3Count=0; 7

float fPwmDuty=0.0;

CapEvent1Count = CAP_getCap1(myCap);

CapEvent2Count = CAP_getCap2(myCap);

CapEvent3Count = CAP_getCap3(myCap);

fPwmDuty = (float)(CapEvent2Count - CapEvent1Count) / (CapEvent3Count - CapEvent1Count); //计算PWM占空比

fPwmDuty=fPwmDuty*100;

NOW_PWM=(int)fPwmDuty;

CAP_clearInt(myCap, CAP_Int_Type_CEVT3);

CAP_clearInt(myCap, CAP_Int_Type_Global);

// Acknowledge this interrupt to receive more interrupts from group 4

PIE_clearInt(myPie, PIE_GroupNumber_4);

}

//redefined in Isr.h

// end of file

嵌入式系统设计课设报告

①/*F2802x_Device.h*/

#include "F2802x_Component/include/adc.h"

#include "F2802x_Component/include/clk.h"

#include "F2802x_Component/include/flash.h"

#include "F2802x_Component/include/gpio.h"

#include "F2802x_Component/include/pie.h"

#include "F2802x_Component/include/pll.h"

#include "F2802x_Component/include/timer.h"

#include "F2802x_Component/include/wdog.h"

#include "F2802x_Component/include/sci.h"

#include "F2802x_Component/include/cap.h"

8

①/*Key.c*/

// the includes

#include "User_Component/Key/Key.h"

//

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

// the defines

//

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

// the globals

//

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

// the functions

// the function prototypes

void KEY_initial(void)

{

}

//

//! \brief KEY configure

void KEY_config(void)

{ //按键为GPIO12设置为输入口

//1. mode

嵌入式系统设计课设报告

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GPIO_setMode(KEY_obj, KEY1, GPIO_12_Mode_GeneralPurpose);

//2. direction

GPIO_setDirection(KEY_obj, KEY1, GPIO_Direction_Input);

GPIO_setPullUp(KEY_obj, KEY1, GPIO_PullUp_Disable);

//4. qualification

GPIO_setQualification(KEY_obj, KEY1, GPIO_Qual_Sync);

}

//! \brief ScanKey API

uint16_t ScanKey(const GPIO_Number_e key)

{

return GPIO_getData(KEY_obj, key);

}

void KEY_INT_config(void)

{ //(3). register PIR vector

PIE_registerPieIntHandler(myPie, PIE_GroupNumber_1, PIE_SubGroupNumber_4, (intVec_t) &KEY_xint1_isr);

//(4). module interrupt configure

PIE_setExtIntPolarity(myPie,CPU_ExtIntNumber_1, PIE_ExtIntPolarity_FallingEdge);

GPIO_setExtInt(myGpio, GPIO_Number_12, CPU_ExtIntNumber_1);

//(5). enable module IE

PIE_enableExtInt(myPie, CPU_ExtIntNumber_1);

//(6). enable PIEIERx.y

PIE_enableInt(myPie, PIE_GroupNumber_1, PIE_InterruptSource_XINT_1);

//(7) enable CPU IERx

CPU_enableInt(myCpu, CPU_IntNumber_1);

10

}

//

//! \brief Interrupt Service Routine

TARGET_EXT interrupt void KEY_xint1_isr(void); //redefined in Isr.h

// end of file

/*Key.h*/

#ifndef _KEY_H_

#define _KEY_H_

// the includes

#include <stdint.h>

// driver

#include "F2802x_Component/F2802x_Device.h"

#include "User_Component/User_Mcu/User_System.h"

#ifdef __cplusplus

extern "C" {

#endif

#ifndef TARGET_GLOBAL #define TARGET_EXT extern

#else

#define TARGET_EXT

#endif

/*------- hardware description of the example module -------------*/

// For example

// The module derived from GPIO

#define KEY_obj myGpio //here myGpio is defined in System.h

11

#define KEY1 GPIO_Number_12 //pin

TARGET_EXT void KEY_initial(void);

TARGET_EXT void KEY_config(void);

TARGET_EXT void KEY_INT_config(void);

TARGET_EXT interrupt void KEY_xint1_isr(void); //redefined in Isr.h

/*-------end of hardware description -------------*/

TARGET_EXT uint16_t ScanKey(const GPIO_Number_e key);

/*-------end of API description -------------*/

#define KEYPressed 1

/*------- end of defines -------------*/

#ifdef __cplusplus

}

#endif

#endif // end of _EXAMPLE_H_ definition

②/*LED_PWM.c*/

// the includes

#include "User_Component/LED_PWM/LED_PWM.h"

// the functions

void LED_PWM_initial(void)

{

mycmp=0;

}

void LED_PWM_config(void)

{

//GPIO的配置

GPIO_setMode(myGpio,GPIO_Number_0,GPIO_0_Mode_EPWM1A); 12

GPIO_setPullUp(myGpio,GPIO_Number_0,GPIO_PullUp_Disable); //PWM的配置

CLK_disableTbClockSync(myClk);

//PWM模块使能

CLK_enablePwmClock(myClk,PWM_Number_1);

//设置PWM的时钟

//PWM_setClkDiv(myPwm1,PWM_ClkDiv_by_1);

PWM_setHighSpeedClkDiv(myPwm1, PWM_HspClkDiv_by_6);

//计数器的设置

PWM_setCounterMode(myPwm1,PWM_CounterMode_Up);

//PWM周期设置

PWM_setPeriod(myPwm1,10000);

//设置周期加载模式

PWM_setPeriodLoad(myPwm1,PWM_PeriodLoad_Shadow);

//比较点的设置

PWM_setCmpA(myPwm1,5000);

//PWM装载模式

PWM_setLoadMode_CmpA(myPwm1,PWM_LoadMode_Period);

//动作

PWM_setActionQual_CntUp_CmpA_PwmA(myPwm1,PWM_ActionQual_Set);

PWM_setActionQual_Period_PwmA(myPwm1,PWM_ActionQual_Clear); //时钟同步

CLK_enableTbClockSync(myClk);

}

void LED_PWM_INT_config(void)

{

PIE_registerPieIntHandler(myPie,PIE_GroupNumber_3,PIE_SubGroupNumber_1,(intVec_t)&(LED_PWM_isr));

//模块中断配置

PWM_setIntMode(myPwm1,PWM_IntMode_CounterEqualPeriod); PWM_setIntPeriod(myPwm1,PWM_IntPeriod_FirstEvent);

//PWM中断使能

PWM_enableInt(myPwm1);

//PIE开关的允许

PIE_enableInt(myPie, PIE_GroupNumber_3, PIE_InterruptSource_EPWM1);

//CPU全局中断

CPU_enableInt(myCpu,CPU_IntNumber_3);

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}

// end of file

/LED_PWM.h*/

#ifndef _LED_PWM_H_

#define _LED_PWM_H_

// the includes

#include <stdint.h>

// driver

#include "F2802x_Component/F2802x_Device.h"

#include "User_Component/User_Mcu/User_System.h"

#ifdef __cplusplus

extern "C" {

#endif

#ifndef TARGET_GLOBAL #define TARGET_EXT extern

#else

#define TARGET_EXT

#endif

/*------- hardware description of the example -------------*/

TARGET_EXT void LED_PWM_initial(void);

14 module

TARGET_EXT void LED_PWM_config(void);

TARGET_EXT void LED_PWM_INT_config(void);

TARGET_EXT interrupt void LED_PWM_isr(void); //redefined in Isr.h

/*-------end of hardware description -------------*/

TARGET_EXT uint16_t mycmp;

#ifdef __cplusplus

}

#endif

#endif // end of _EXAMPLE_H_ definition

③/*MY_ADC.c*/

// the includes

#include "User_Component/MY_ADC/MY_ADC.h"

// the functions

void MY_ADC_initial(void)

{

SET_TEMP=30; //初始设定温度为30摄氏度

}

void MY_ADC_config(void)

{ //ADC时钟使能

CLK_enableAdcClock(myClk);

//初始化ADC模块

ADC_setVoltRefSrc(myAdc, ADC_VoltageRefSrc_Int);

ADC_powerUp(myAdc);

15

ADC_enableBandGap(myAdc);

ADC_enableRefBuffers(myAdc);

ADC_enable(myAdc);

//温度转换使能

ADC_enableTempSensor(myAdc);

ADC_setSocChanNumber(myAdc, ADC_SocNumber_0, ADC_SocChanNumber_A5);

ADC_setSocSampleWindow(myAdc, ADC_SocNumber_0, ADC_SocSampleWindow_7_cycles);

ADC_setSocTrigSrc(myAdc, ADC_SocNumber_0, ADC_SocTrigSrc_EPWM1_ADCSOCA);

//PWM配置

PWM_setSocAPulseSrc(myPwm1,PWM_SocPulseSrc_CounterEqualZero); PWM_setSocAPeriod(myPwm1,PWM_SocPeriod_FirstEvent);

PWM_enableSocAPulse(myPwm1);

}

void MY_ADC_INT_config(void)

{

PIE_registerPieIntHandler(myPie,PIE_GroupNumber_10,PIE_SubGroupNumber_1,(intVec_t)&(MY_ADC_isr));

//模块中断配置

ADC_setIntPulseGenMode(myAdc, ADC_IntPulseGenMode_Prior); ADC_setIntSrc(myAdc,ADC_IntNumber_1, ADC_IntSrc_EOC0);

ADC_setIntMode(myAdc, ADC_IntNumber_1, ADC_IntMode_ClearFlag);

//ADC中断使能

ADC_enableInt(myAdc,ADC_IntNumber_1);

//PIE开关的允许

PIE_enableInt(myPie, PIE_GroupNumber_10, PIE_InterruptSource_ADCINT_10_1);

//CPU全局中断

CPU_enableInt(myCpu,CPU_IntNumber_10);

}

16

// end of file

/*MY_ADC.h*/

#ifndef _MY_ADC_H_

#define _MY_ADC_H_

// the includes

#include <stdint.h>

// driver

#include "F2802x_Component/F2802x_Device.h"

#include "User_Component/User_Mcu/User_System.h"

#ifdef __cplusplus

extern "C" {

#endif

#ifndef TARGET_GLOBAL #define TARGET_EXT extern

#else

#define TARGET_EXT

#endif

/*------- hardware description of the example module -------------*/

TARGET_EXT void MY_ADC_initial(void);

TARGET_EXT void MY_ADC_config(void);

TARGET_EXT void MY_ADC_INT_config(void);

TARGET_EXT interrupt void MY_ADC_isr(void); //redefined in Isr.h

/*-------end of hardware description -------------*/

17

TARGET_EXT uint16_t MY_ADC;

TARGET_EXT uint16_t SET_TEMP;

/*------- end of globals -------------*/

#ifdef __cplusplus

}

#endif

#endif // end of _EXAMPLE_H_ definition

④/*MY_CAP.c*/

// the includes

#include "User_Component/MY_CAP/MY_CAP.h"

#include "User_Component/User_Mcu/User_System.h"

void MY_CAP_initial(void)

{

}

void MY_CAP_config(void)

{

GPIO_setPullUp(myGpio, GPIO_Number_5, GPIO_PullUp_Enable); GPIO_setQualification(myGpio, GPIO_Number_5, GPIO_Qual_Sync);

GPIO_setMode(myGpio, GPIO_Number_5, GPIO_5_Mode_ECAP1);

CLK_enableEcap1Clock(myClk);

CAP_disableInt(myCap, CAP_Int_Type_All); // 禁止CAP中断 CAP_clearInt(myCap, CAP_Int_Type_All); // 清除CAP中断标志位 CAP_disableCaptureLoad(myCap); // Disable CAP1-CAP4 register loads

CAP_disableTimestampCounter(myCap); // Make sure 18

the counter is stopped

// Configure peripheral registers

CAP_setCapContinuous(myCap); // continuous

CAP_setStopWrap(myCap, CAP_Stop_Wrap_CEVT4);// Stop at 3 events

CAP_setCapEvtPolarity(myCap, CAP_Event_1, CAP_Polarity_Rising); // 捕获上升沿

CAP_setCapEvtPolarity(myCap, CAP_Event_2, CAP_Polarity_Falling); // 捕获下降沿

CAP_setCapEvtPolarity(myCap, CAP_Event_3, CAP_Polarity_Rising); // 捕获上升沿

CAP_setCapEvtReset(myCap, CAP_Event_3, CAP_Reset_Enable); // 重置计数器确保计数器不会溢出

CAP_enableTimestampCounter(myCap); // 打开计数器

CAP_enableCaptureLoad(myCap); // Enable CAP1-CAP4 register loads

/* CAP_enableInt(myCap, CAP_Int_Type_CEVT3); // 3个捕获点之后发生中断

// Register interrupt handlers in the PIE vector table PIE_registerPieIntHandler(myPie, PIE_GroupNumber_4, PIE_SubGroupNumber_1, (intVec_t)&ecap1_isr);

// Enable CPU INT4 which is connected to ECAP1-4 INT: CPU_enableInt(myCpu, CPU_IntNumber_4);

// Enable eCAP INTn in the PIE: Group 3 interrupt 1-6 PIE_enableCaptureInt(myPie);

CPU_enableGlobalInts(myCpu);

*/

}

void MY_CAP_INT_config(void)

{

CAP_enableInt(myCap, CAP_Int_Type_CEVT3); // 3 events = interrupt

// Register interrupt handlers in the PIE vector table PIE_registerPieIntHandler(myPie, PIE_GroupNumber_4, PIE_SubGroupNumber_1, (intVec_t)&MY_CAP_isr);

// Enable CPU INT4 which is connected to ECAP1-4 INT: CPU_enableInt(myCpu, CPU_IntNumber_4);

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// Enable eCAP INTn in the PIE: Group 3 interrupt 1-6 PIE_enableCaptureInt(myPie);

CPU_enableGlobalInts(myCpu);}

// end of file

/*MY_CAP.h*/

#ifndef _MY_CAP_H_

#define _MY_CAP_H_

// the includes

#include <stdint.h>

// driver

#include "F2802x_Component/F2802x_Device.h"

#ifdef __cplusplus

extern "C" {

#endif

#ifndef TARGET_GLOBAL

#define TARGET_EXT extern

#else

#define TARGET_EXT

#endif

/*------- hardware description of the example module -------------*/

TARGET_EXT void MY_CAP_initial(void);

TARGET_EXT void MY_CAP_config(void);

TARGET_EXT void MY_CAP_INT_config(void);

TARGET_EXT interrupt void MY_CAP_isr(void); //redefined in Isr.h

/*-------end of hardware description -------------*/

20

TARGET_EXT int NOW_PWM;

#ifdef __cplusplus

}

#endif

#endif // end of _EXAMPLE_H_ definition

⑤/*mySci.c*/

// the includes

#include "User_Component/mySci/mySci.h"

// the functions

// the function prototypes

void SCI_initial(void)

{

}

//

//! \brief SCI configure

void SCI_config(void)

{ //1. GPIO configure

GPIO_setPullUp(myGpio, GPIO_Number_28, GPIO_PullUp_Enable); GPIO_setPullUp(myGpio, GPIO_Number_29, GPIO_PullUp_Disable); //1.2 input qualification

GPIO_setQualification(myGpio, GPIO_Number_28, GPIO_Qual_ASync);

//1.3 mode

GPIO_setMode(myGpio, GPIO_Number_28, GPIO_28_Mode_SCIRXDA); //SCI数据发送引脚

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GPIO_setMode(myGpio, GPIO_Number_29, GPIO_29_Mode_SCITXDA); //SCI数据接收引脚

CLK_enableSciaClock(myClk);

//3. configure the low speed peripheral clock(LSPCLK) LSPCLK = SYSCLKOUT/4 =15MHz

CLK_setLowSpdPreScaler(myClk,

CLK_LowSpdPreScaler_SysClkOut_by_4);

//设置时钟分频

//4. SCI BRR = LSPCLK/(SCI BAUDx8) - 1

SCI_setBaudRate(mySci, SCI_BaudRate_9_6_kBaud);

//设置波特率为9600

SCI_disableParity(mySci);

SCI_setNumStopBits(mySci, SCI_NumStopBits_One);

SCI_setCharLength(mySci, SCI_CharLength_8_Bits);

//6. enable SCI TX&RX

SCI_enableTx(mySci);

SCI_enableRx(mySci);

//7.configure the SCI TX&RX FIFO

//7.1 enable FIFO

//先进先出

SCI_resetChannels(mySci);

SCI_enableFifoEnh(mySci);

//7.2 configure TX FIFO

SCI_resetTxFifo(mySci);

//7.3 configure RX FIFO

SCI_resetRxFifo(mySci);

//8. enable SCI module

SCI_enable(mySci);

}

//! \brief Transmit a string from the SCI

void scia_msg(char * msg)

{

int i;

i = 0;

while(msg[i] != '\0')

{

scia_xmit(msg[i]);

i++;

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}

}

//! \brief Transmit a char from the SCI

void scia_xmit(int a)

{

while(SCI_getTxFifoStatus(mySci) != SCI_FifoStatus_Empty) {} SCI_putDataBlocking(mySci, a);

}

//! \brief Receive a char from the SCI

//! 00: no received /00: received

int scia_receive(uint16_t *a)

{

if(SCI_getRxFifoStatus(mySci) < SCI_FifoStatus_1_Word) { return 0;

}

else

{

*a = SCI_getData(mySci);

}

return 1;

}

// end of file

/*mySci.h*/

/

#ifndef _MYSCI_H_

#define _MYSCI_H_

//

************************************************************** 23

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

// the includes

#include <stdint.h>

// driver

#include "F2802x_Component/F2802x_Device.h"

#include "User_Component/User_Mcu/User_System.h"

#ifdef __cplusplus

extern "C" {

#endif

#ifndef TARGET_GLOBAL #define TARGET_EXT extern

#else

#define TARGET_EXT

#endif

/*------- hardware description of the example -------------*/

//

// the function prototypes

TARGET_EXT void SCI_initial(void);

//

//! \brief SCI configure

TARGET_EXT void SCI_config(void);

//

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

//TARGET_EXT void SCI_INT_config(void);

//

//! \brief CPU Timer0 Interrupt Service Routine

24 module

//TARGET_EXT interrupt void SCI_isr(void); //redefined in Isr.h

/*-------end of hardware description -------------*/

TARGET_EXT void scia_msg(char * msg);

TARGET_EXT void scia_xmit(int a);

TARGET_EXT int scia_receive(uint16_t *a);

/*-------end of API description -------------*/

#ifdef __cplusplus

}

#endif

#endif // end of _EXAMPLE_H_ definition

⑥/*User_System.c*/

#include "User_Component/User_Mcu/User_System.h"

// system initial

void System_initial(void)

{ }

void System_config(void)

{

//0.

myCpu = CPU_init((void *)NULL, sizeof(CPU_Obj));

myWDog = WDOG_init((void *)WDOG_BASE_ADDR, sizeof(WDOG_Obj)); myPll = PLL_init((void *)PLL_BASE_ADDR, sizeof(PLL_Obj)); myClk = CLK_init((void *)CLK_BASE_ADDR, sizeof(CLK_Obj)); myGpio = GPIO_init((void *)GPIO_BASE_ADDR, sizeof(GPIO_Obj)); myPie = PIE_init((void *)PIE_BASE_ADDR, sizeof(PIE_Obj)); //中断指针赋值

myTimer0 = TIMER_init((void *)TIMER0_BASE_ADDR, sizeof(TIMER_Obj)); // CPU Timer0

25

myPwm1 = PWM_init((void *)PWM_ePWM1_BASE_ADDR, sizeof(PWM_Obj)); // PWM1

myPwm2 = PWM_init((void *)PWM_ePWM2_BASE_ADDR, sizeof(PWM_Obj)); // PWM2

myAdc = ADC_init((void *)ADC_BASE_ADDR, sizeof(ADC_Obj));

mySci = SCI_init((void *)SCIA_BASE_ADDR, sizeof(SCI_Obj)); // SCIA

myCap = CAP_init((void *)CAPA_BASE_ADDR, sizeof(CAP_Obj)); // 1. disable watch DOG

WDOG_disable(myWDog);

// 2. disable interrupt

CPU_disableGlobalInts(myCpu);

// 3. Select the internal oscillator 1(10MHz) as the clock source

CLK_setOscSrc(myClk, CLK_OscSrc_Internal);

// 4. Setup the PLL for x12 /2 which will yield 60Mhz = 10Mhz * 12 / 2

PLL_setup(myPll, PLL_Multiplier_12, PLL_DivideSelect_ClkIn_by_2);

// 5. PIE configure

PIE_disable(myPie); //禁止PIE

PIE_disableAllInts(myPie); //禁止PIE中断

CPU_disableGlobalInts(myCpu); //CPU全局中断禁止

CPU_clearIntFlags(myCpu); //CPU中断标志位清零

PIE_setDefaultIntVectorTable(myPie); //中断入口地址赋予默认值

PIE_enable(myPie); //使能PIE

}

void SystemINT_start(void) //User PIE start

{

// (8)。 Enable Global Interrupts

CPU_enableGlobalInts(myCpu); //允许CPU全局中断 }

//===========================================================================

// End of file.

//============================================================ 26

===============

/*User_System.h*/

#ifndef USER_SYSTEM_H

#define USER_SYSTEM_H

#ifdef __cplusplus

extern "C" {

#endif

#ifndef TARGET_GLOBAL #define TARGET_EXT extern

#else

#define TARGET_EXT

#endif

//includes

#include "F2802x_Component/F2802x_Device.h"

TARGET_EXT CLK_Handle myClk;

TARGET_EXT CPU_Handle myCpu;

TARGET_EXT PLL_Handle myPll;

TARGET_EXT WDOG_Handle myWDog;

TARGET_EXT PIE_Handle myPie;

TARGET_EXT GPIO_Handle myGpio;

TARGET_EXT TIMER_Handle myTimer0;

TARGET_EXT PWM_Handle myPwm1;

TARGET_EXT PWM_Handle myPwm2;

TARGET_EXT ADC_Handle myAdc;

TARGET_EXT SCI_Handle mySci;

TARGET_EXT CAP_Handle myCap;

TARGET_EXT void System_initial(void); //system initial TARGET_EXT void System_config(void); TARGET_EXT void SystemINT_start(void); //PIE start

#ifdef __cplusplus

}

#endif

27

#endif

⑦/*User_Device.h*/

#include "User_Component/User_Mcu/User_System.h"

#include "User_Component/LED_GPIO/LED_GPIO.h"

#include "User_Component/LED_PWM/LED_PWM.h"

#include "User_Component/MY_ADC/MY_ADC.h"

#include "User_Component/Key/Key.h"

#include "User_Component/mySci/mySci.h"

#include "User_Component/MY_CAP/MY_CAP.h"

⑧/*main.c*/

/*

* main.c

*/

#define TARGET_GLOBAL 1

#include "User_Component/User_Device.h"

#include "Application\app.h"

TARGET_EXT uint16_t NOW_CMPA;

当前PWM占空比

char *msg;

char buf[10];

void main(void)

28

{

//1. configure

System_config();

LED_GPIO_config();

LED_PWM_config();

MY_ADC_config();

KEY_config();

SCI_config();

MY_CAP_config();

//

//2. initial

System_initial();

LED_GPIO_initial();

LED_PWM_initial();

MY_ADC_initial();

KEY_initial();

SCI_initial();

MY_CAP_initial();

//3. Interrupt configure and initial (if use interrupt) LED_PWM_INT_config();

MY_ADC_INT_config();

KEY_INT_config();

MY_CAP_INT_config();

//4. the global interrupt start (if use interrupt) SystemINT_start();

msg = "\r\n\n\n虚拟温度控制系统!\0";

scia_msg(msg);

//5. main LOOP

for( ; ; )

{

//NOW_CMPA=PWM_getCmpA(myPwm1);

//NOW_PWM=NOW_CMPA/100;

// call API from app.h

//led_control();

29

msg = ;

scia_msg(msg);

buf[0] = MY_ADC/10 + 48;

buf[1] = MY_ADC%10 + 48;

buf[2] = 0;

msg = buf;

scia_msg(msg);

msg = ;

scia_msg(msg);

buf[0] = SET_TEMP/10 + 48;

buf[1] = SET_TEMP%10 + 48;

buf[2] = 0;

msg = buf;

scia_msg(msg);

msg = "\r\n\n\n current PWM 占空比: \0";

scia_msg(msg);

buf[0] = NOW_PWM/10 + 48;

buf[1] = NOW_PWM%10 + 48;

buf[2] = 0;

msg = buf;

scia_msg(msg);

delay(2000000);

6、调试总结

首先,通过大分频从LED查看PWM模块是否正常工作。之后改变分频系数和周期实现1K Hz的PWM波。

然后,测试ADC模块。通过查看expression的变量查看温度。

测试CAP模块。通过expression查看PWM占空比是否正确。

最后测试SCI模块。将温度和占空比传送到上位机查看。

得到结果截图如下:

30

7、设计心得体会

通过这次课程设计,我对代码的模块化编程有了更深入的了解,通过模块化编程让整地代码的可读性有了很大的提高,也提高了编程的速度。同时也学习了通过查看芯片的手册,加深对函数的理解,例如通过看芯片手册波形,计数方式的查看令我加深对PWM,ECAP模块编程的理解。更好地理解各函数的用途。对课题的整体进行合理的布局,对CCS等软件的使用和调试也更加熟练。同时也通过与同学的交流沟通发现程序中自己没有发现的BUG,更加完善了代码。

8、参考文献

1、LAUNCHXL-F28027 C2000 Piccolo LaunchPad Experimenter Kit.pdf

2、王武,蔡逢煌.嵌入式系统技术基础与实践.福州大学电气工程与自动化学院

嵌入式系统设计课设报告

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嵌入式系统设计课设报告

32



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