DSP CCS12.00 芯片：TMS320F28335 映射的区域的流水灯LED 加上蜂鸣器的使用

1.首先添加文件 V101\DSP2833x_common\source\DSP2833x_Xintf

在我之前给的资源里面含有！（V101）

这个.c 文件添加到 res 新建文件夹里面。

在之前的建立工程的基础上

2.我们需要运用一个新的函数 InitXintf();

他的功能：定义映射区域的代码：

InitXintf.c


// TI File $Revision: /main/5 $
// Checkin $Date: August 16, 2007   11:06:26 $
//###########################################################################
//
// FILE:   DSP2833x_Xintf.c
//
// TITLE:   DSP2833x Device External Interface Init & Support Functions.
//
// DESCRIPTION:
//
//          Example initialization function for the external interface (XINTF).
//          This example configures the XINTF to its default state.  For an
//          example of how this function being used refer to the
//          examples/run_from_xintf project.
//
//###########################################################################
// $TI Release: DSP2833x Header Files V1.01 $
// $Release Date: September 26, 2007 $
//###########################################################################
 
#include "DSP2833x_Device.h"     // DSP2833x Headerfile Include File
#include "DSP2833x_Examples.h"   // DSP2833x Examples Include File
 
//---------------------------------------------------------------------------
// InitXINTF:
//---------------------------------------------------------------------------
// This function initializes the External Interface the default reset state.
//
// Do not modify the timings of the XINTF while running from the XINTF.  Doing
// so can yield unpredictable results
 
 
void InitXintf(void)
{
    // This shows how to write to the XINTF registers.  The
    // values used here are the default state after reset.
    // Different hardware will require a different configuration.
 
    // For an example of an XINTF configuration used with the
    // F28335 eZdsp, refer to the examples/run_from_xintf project.
 
    // Any changes to XINTF timing should only be made by code
    // running outside of the XINTF.
 
    // All Zones---------------------------------
    // Timing for all zones based on XTIMCLK = 1/2 SYSCLKOUT
    EALLOW;
    XintfRegs.XINTCNF2.bit.XTIMCLK = 1;
    // No write buffering
    XintfRegs.XINTCNF2.bit.WRBUFF = 0;
    // XCLKOUT is enabled
    XintfRegs.XINTCNF2.bit.CLKOFF = 0;
    // XCLKOUT = XTIMCLK/2
    XintfRegs.XINTCNF2.bit.CLKMODE = 1;
 
 
    // Zone 0------------------------------------
    // When using ready, ACTIVE must be 1 or greater
    // Lead must always be 1 or greater
    // Zone write timing
    XintfRegs.XTIMING0.bit.XWRLEAD = 3;
    XintfRegs.XTIMING0.bit.XWRACTIVE = 7;
    XintfRegs.XTIMING0.bit.XWRTRAIL = 3;
    // Zone read timing
    XintfRegs.XTIMING0.bit.XRDLEAD = 3;
    XintfRegs.XTIMING0.bit.XRDACTIVE = 7;
    XintfRegs.XTIMING0.bit.XRDTRAIL = 3;
 
    // double all Zone read/write lead/active/trail timing
    XintfRegs.XTIMING0.bit.X2TIMING = 1;
 
    // Zone will sample XREADY signal
    XintfRegs.XTIMING0.bit.USEREADY = 1;
    XintfRegs.XTIMING0.bit.READYMODE = 1;  // sample asynchronous
 
    // Size must be either:
    // 0,1 = x32 or
    // 1,1 = x16 other values are reserved
    XintfRegs.XTIMING0.bit.XSIZE = 3;
 
    // Zone 6------------------------------------
    // When using ready, ACTIVE must be 1 or greater
    // Lead must always be 1 or greater
    // Zone write timing
    XintfRegs.XTIMING6.bit.XWRLEAD = 3;
    XintfRegs.XTIMING6.bit.XWRACTIVE = 7;
    XintfRegs.XTIMING6.bit.XWRTRAIL = 3;
    // Zone read timing
    XintfRegs.XTIMING6.bit.XRDLEAD = 3;
    XintfRegs.XTIMING6.bit.XRDACTIVE = 7;
    XintfRegs.XTIMING6.bit.XRDTRAIL = 3;
 
    // double all Zone read/write lead/active/trail timing
    XintfRegs.XTIMING6.bit.X2TIMING = 1;
 
    // Zone will sample XREADY signal
    XintfRegs.XTIMING6.bit.USEREADY = 1;
    XintfRegs.XTIMING6.bit.READYMODE = 1;  // sample asynchronous
 
    // Size must be either:
    // 0,1 = x32 or
    // 1,1 = x16 other values are reserved
    XintfRegs.XTIMING6.bit.XSIZE = 3;
 
    // Bank switching
    // Assume Zone 6 is slow, so add additional BCYC cycles
    // when ever switching from Zone 6 to another Zone.
    // This will help avoid bus contention.
    XintfRegs.XBANK.bit.BANK = 6;
    XintfRegs.XBANK.bit.BCYC = 6;
 
    // Zone 7------------------------------------
    // When using ready, ACTIVE must be 1 or greater
    // Lead must always be 1 or greater
    // Zone write timing
    XintfRegs.XTIMING7.bit.XWRLEAD = 3;
    XintfRegs.XTIMING7.bit.XWRACTIVE = 7;
    XintfRegs.XTIMING7.bit.XWRTRAIL = 3;
    // Zone read timing
    XintfRegs.XTIMING7.bit.XRDLEAD = 3;
    XintfRegs.XTIMING7.bit.XRDACTIVE = 7;
    XintfRegs.XTIMING7.bit.XRDTRAIL = 3;
 
    // double all Zone read/write lead/active/trail timing
    XintfRegs.XTIMING7.bit.X2TIMING = 1;
 
    // Zone will sample XREADY signal
    XintfRegs.XTIMING7.bit.USEREADY = 1;
    XintfRegs.XTIMING7.bit.READYMODE = 1;  // sample asynchronous
 
    // Size must be either:
    // 0,1 = x32 or
    // 1,1 = x16 other values are reserved
    XintfRegs.XTIMING7.bit.XSIZE = 3;
 
    // Bank switching
    // Assume Zone 7 is slow, so add additional BCYC cycles
    // when ever switching from Zone 6 to another Zone.
    // This will help avoid bus contention.
//    XintfRegs.XBANK.bit.BANK = 7;
//    XintfRegs.XBANK.bit.BCYC = 7;
    EDIS;
   //Force a pipeline flush to ensure that the write to
   //the last register configured occurs before returning.
 
   InitXintf16Gpio();
// InitXintf32Gpio();
 
   asm(" RPT #7 || NOP");
 
}
 
void InitXintf32Gpio()
{
     EALLOW;
     GpioCtrlRegs.GPBMUX2.bit.GPIO48 = 3;  // XD31
     GpioCtrlRegs.GPBMUX2.bit.GPIO49 = 3;  // XD30
     GpioCtrlRegs.GPBMUX2.bit.GPIO50 = 3;  // XD29
     GpioCtrlRegs.GPBMUX2.bit.GPIO51 = 3;  // XD28
     GpioCtrlRegs.GPBMUX2.bit.GPIO52 = 3;  // XD27
     GpioCtrlRegs.GPBMUX2.bit.GPIO53 = 3;  // XD26
     GpioCtrlRegs.GPBMUX2.bit.GPIO54 = 3;  // XD25
     GpioCtrlRegs.GPBMUX2.bit.GPIO55 = 3;  // XD24
     GpioCtrlRegs.GPBMUX2.bit.GPIO56 = 3;  // XD23
     GpioCtrlRegs.GPBMUX2.bit.GPIO57 = 3;  // XD22
     GpioCtrlRegs.GPBMUX2.bit.GPIO58 = 3;  // XD21
     GpioCtrlRegs.GPBMUX2.bit.GPIO59 = 3;  // XD20
     GpioCtrlRegs.GPBMUX2.bit.GPIO60 = 3;  // XD19
     GpioCtrlRegs.GPBMUX2.bit.GPIO61 = 3;  // XD18
     GpioCtrlRegs.GPBMUX2.bit.GPIO62 = 3;  // XD17
     GpioCtrlRegs.GPBMUX2.bit.GPIO63 = 3;  // XD16
 
     GpioCtrlRegs.GPBQSEL2.bit.GPIO48 = 3;  // XD31 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO49 = 3;  // XD30 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO50 = 3;  // XD29 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO51 = 3;  // XD28 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO52 = 3;  // XD27 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO53 = 3;  // XD26 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO54 = 3;  // XD25 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO55 = 3;  // XD24 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO56 = 3;  // XD23 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO57 = 3;  // XD22 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO58 = 3;  // XD21 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO59 = 3;  // XD20 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO60 = 3;  // XD19 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO61 = 3;  // XD18 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO62 = 3;  // XD17 asynchronous input
     GpioCtrlRegs.GPBQSEL2.bit.GPIO63 = 3;  // XD16 asynchronous input
 
 
     InitXintf16Gpio();
}
 
void InitXintf16Gpio()
{
     EALLOW;
     GpioCtrlRegs.GPCMUX1.bit.GPIO64 = 3;  // XD15
     GpioCtrlRegs.GPCMUX1.bit.GPIO65 = 3;  // XD14
     GpioCtrlRegs.GPCMUX1.bit.GPIO66 = 3;  // XD13
     GpioCtrlRegs.GPCMUX1.bit.GPIO67 = 3;  // XD12
     GpioCtrlRegs.GPCMUX1.bit.GPIO68 = 3;  // XD11
     GpioCtrlRegs.GPCMUX1.bit.GPIO69 = 3;  // XD10
     GpioCtrlRegs.GPCMUX1.bit.GPIO70 = 3;  // XD19
     GpioCtrlRegs.GPCMUX1.bit.GPIO71 = 3;  // XD8
     GpioCtrlRegs.GPCMUX1.bit.GPIO72 = 3;  // XD7
     GpioCtrlRegs.GPCMUX1.bit.GPIO73 = 3;  // XD6
     GpioCtrlRegs.GPCMUX1.bit.GPIO74 = 3;  // XD5
     GpioCtrlRegs.GPCMUX1.bit.GPIO75 = 3;  // XD4
     GpioCtrlRegs.GPCMUX1.bit.GPIO76 = 3;  // XD3
     GpioCtrlRegs.GPCMUX1.bit.GPIO77 = 3;  // XD2
     GpioCtrlRegs.GPCMUX1.bit.GPIO78 = 3;  // XD1
     GpioCtrlRegs.GPCMUX1.bit.GPIO79 = 3;  // XD0
 
     GpioCtrlRegs.GPBMUX1.bit.GPIO40 = 3;  // XA0/XWE1n
     GpioCtrlRegs.GPBMUX1.bit.GPIO41 = 3;  // XA1
     GpioCtrlRegs.GPBMUX1.bit.GPIO42 = 3;  // XA2
     GpioCtrlRegs.GPBMUX1.bit.GPIO43 = 3;  // XA3
     GpioCtrlRegs.GPBMUX1.bit.GPIO44 = 3;  // XA4
     GpioCtrlRegs.GPBMUX1.bit.GPIO45 = 3;  // XA5
     GpioCtrlRegs.GPBMUX1.bit.GPIO46 = 3;  // XA6
     GpioCtrlRegs.GPBMUX1.bit.GPIO47 = 3;  // XA7
 
     GpioCtrlRegs.GPCMUX2.bit.GPIO80 = 3;  // XA8
     GpioCtrlRegs.GPCMUX2.bit.GPIO81 = 3;  // XA9
     GpioCtrlRegs.GPCMUX2.bit.GPIO82 = 3;  // XA10
     GpioCtrlRegs.GPCMUX2.bit.GPIO83 = 3;  // XA11
     GpioCtrlRegs.GPCMUX2.bit.GPIO84 = 3;  // XA12
     GpioCtrlRegs.GPCMUX2.bit.GPIO85 = 3;  // XA13
     GpioCtrlRegs.GPCMUX2.bit.GPIO86 = 3;  // XA14
     GpioCtrlRegs.GPCMUX2.bit.GPIO87 = 3;  // XA15
     GpioCtrlRegs.GPBMUX1.bit.GPIO39 = 3;  // XA16
     GpioCtrlRegs.GPAMUX2.bit.GPIO31 = 3;  // XA17
     GpioCtrlRegs.GPAMUX2.bit.GPIO30 = 3;  // XA18
     GpioCtrlRegs.GPAMUX2.bit.GPIO29 = 3;  // XA19
 
     GpioCtrlRegs.GPBMUX1.bit.GPIO34 = 3;  // XREADY
	 GpioCtrlRegs.GPBMUX1.bit.GPIO35 = 3;  // XRNW
     GpioCtrlRegs.GPBMUX1.bit.GPIO38 = 3;  // XWE0
 
     GpioCtrlRegs.GPBMUX1.bit.GPIO36 = 3;  // XZCS0
     GpioCtrlRegs.GPBMUX1.bit.GPIO37 = 3;  // XZCS7
     GpioCtrlRegs.GPAMUX2.bit.GPIO28 = 3;  // XZCS6
     EDIS;
}
 
//===========================================================================
// No more.
//===========================================================================

3.我们的实验代码：

我们加上蜂鸣器模块，蜂鸣器是 p60 引脚控制。

蜂鸣器是高电平发出响声！

LED灯是低电平点亮！

实验功能：实验流水灯的效果：并且每亮一个灯，我们的蜂鸣器就响一下！

代码：


 
#include "DSP2833x_Device.h"     // DSP2833x Headerfile Include File
#include "DSP2833x_Examples.h"   // DSP2833x Examples Include File
 
/****************端口宏定义*****************/
#define LED  *((Uint16 *)0x4600)
const Uint16 LedCode[9]={0x7F,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0xFE,0XFF};
 
/****************函数声明*******************/
void Gpio_select(void); //gpio端口配置子程序
void delay_loop(void);
 
void main(void)
{
 
   InitSysCtrl();
 
   Gpio_select();
   DINT;
   InitPieCtrl();
   IER = 0x0000;
   IFR = 0x0000;
   InitPieVectTable();
   InitXintf();
   LED=0x00;//全亮
   for(;;)
   {
       unsigned int i=0;
       for(i=0;i<8;i++)
       {
           LED=LedCode[i];
           delay_loop();
       }
 
   }
}
 
void delay_loop()
{
    Uint32      i;
    Uint32      j;
 
 
    GpioDataRegs.GPBSET.bit.GPIO60=1;//设置GPIO60输出高电平  高电平响
    for(i=0;i<40;i++)
    {
        for (j = 0; j < 100000; j++);
    }
 
    GpioDataRegs.GPBCLEAR.bit.GPIO60 = 1; //设置GPIO60输出为低电平
    for(i=0;i<40;i++)
    {
        for (j = 0; j < 100000; j++);
 
    }
 
 
}
 
 
 
void Gpio_select(void)
{
 
 
 
        EALLOW;
        GpioCtrlRegs.GPBMUX1.bit.GPIO44 = 00;      // GPIO44为GPIO功能
        GpioCtrlRegs.GPBDIR.bit.GPIO44 = 1;      // GPIO44为输出功能
 
        GpioCtrlRegs.GPBMUX1.bit.GPIO45 = 00;      // GPIO45为GPIO功能
        GpioCtrlRegs.GPBDIR.bit.GPIO45 = 1;      // GPIO45为输出功能
 
        GpioCtrlRegs.GPBMUX2.bit.GPIO51 = 00;      // GPIO51为GPIO功能
        GpioCtrlRegs.GPBDIR.bit.GPIO51 = 1;      // GPIO51为输出功能
 
 
        GpioCtrlRegs.GPBMUX2.bit.GPIO53 = 00;      // GPIO53为GPIO功能
        GpioCtrlRegs.GPBDIR.bit.GPIO53 = 1;      // GPIO53为输出功能
 
        GpioCtrlRegs.GPBMUX2.bit.GPIO56 = 00;      // GPIO56为GPIO功能
        GpioCtrlRegs.GPBDIR.bit.GPIO56 = 1;      // GPIO56为输出功能
 
        GpioCtrlRegs.GPBMUX2.bit.GPIO60 = 00;      // GPIO60为GPIO功能
        GpioCtrlRegs.GPBDIR.bit.GPIO60 = 1;      // GPIO60为输出功能
 
        GpioCtrlRegs.GPCMUX1.bit.GPIO72 = 00;      // GPIO72为GPIO功能
        GpioCtrlRegs.GPCDIR.bit.GPIO72 = 1;      // GPIO72为输出功能
 
        GpioCtrlRegs.GPCMUX1.bit.GPIO77 = 00;      // GPIO77为GPIO功能
        GpioCtrlRegs.GPCDIR.bit.GPIO77 = 1;      // GPIO77为输出功能
 
 
        EDIS;
 
 
 
 
}
//===========================================================================
// No more.
//===========================================================================

4.实验结论：

本次实验：映射区域的LED 灯不可以用普通的代码实现！

普通代码：就是引脚初始化！再定义高低电平！

5.最后的实物图片：

6.知识的巩固！

GPIO端口设置如下：

代码：


void InitGpio(void) //初始化GPIO
{
   EALLOW;
//-----------------------------------------------------------------------------------
 
    GpioCtrlRegs.GPBMUX1.all = 0xFFFFFFF0;     // 配置 GPIO32-33为I/O口
                                               // 配置 GPIO34 for XREADY 就绪
                                               // 配置 GPIO35 for XR/W     读
                                               // 配置 GPIO36 for XZCS0 片选
                                               // 配置 GPIO37 for XZCS7 片选
                                               // 配置 GPIO38 for XWE0  写
                                               // 配置 GPIO39 for XA16 地址
                                               // 配置 GPIO40 for XA0 
                                               // 配置 GPIO41 for XA1 
                                               // 配置 GPIO42 for XA2 
                                               // 配置 GPIO43 for XA3 
                                               // 配置 GPIO44 for XA4 
                                               // 配置 GPIO45 for XA5 
                                               // 配置 GPIO46 for XA6 
                                               // 配置 GPIO47 for XA7 
 
    GpioCtrlRegs.GPCMUX1.all = 0xFFFFFFFF;     // 配置 GPIO64-GPIO79 for XD15-XD0 数据
 
    GpioCtrlRegs.GPCMUX2.all = 0xFFFFFFFF;     // 配置 GPIO80-GPIO87 for XA8-XA15 地址
 
 
//  GpioCtrlRegs.GPBDIR.all = 0xE0000000;     // GPIO32-GPIO60 为输入
 
    GpioCtrlRegs.GPCDIR.all = 0x00000000;     // GPI064-GPIO95 为输入
 
//----------------------------------------------------------------------------------------
     GpioCtrlRegs.GPAPUD.all = 0x0100;              // 内部上拉 GPIO0-GPIO31
     GpioCtrlRegs.GPBPUD.all = 0x0000;              // 内部上拉 GPIO32-GPIO63
     GpioCtrlRegs.GPCPUD.all = 0x0000;              // 内部上拉 GPIO64-GPIO79
 
    EDIS;
 
}

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卷麻了，00后测试用例写的比我还好，简直无地自容......
原文地址：https://blog.csdn.net/she666666/article/details/126947710