我想测试一下程序有没有移植到RAM中，有两个指示，一是LED灯亮灭，二是IO口输出与灯亮灭一致 的高低电平。到那时结果显示灯正常，但是输出口输出的波形不对，如下：
我还发现所有的引脚全部是这样的波形，并且关闭DSP开发板的而电源搜有引脚波形跟上图一样。这是怎么回事啊？程序移植困然好几天了，本人太笨了，感觉智商已经到极限了，求求懂得大神们教教我吧！程序如下：
#include "DSP281x_Device.h" // Headerfile Include File
#include "DSP281x_Examples.h" // Examples Include File
#include "DSP281x_Globalprototypes.h"
// Specify LED Toggle Rate
#define EVA_TIMER_PRD 63025 // EVA Timer Period (LED Toggle .75 sec)
//#define EVA_TIMER_PRD 42016 // EVA Timer Period (LED Toggle .5 sec)
//#define EVA_TIMER_PRD 21008 // EVA Timer Period (LED Toggle .25 sec)
unsigned int * LED0 = (unsigned int *) 0x4100;
//unsigned int * LED = (unsigned int *) 0x410;
unsigned int *Ext_IO_L = (unsigned int *)0x4e00; //输出IO口的低16位地址
unsigned int *Ext_IO_H = (unsigned int *)0x4f00;
int flag1 = 0;
#define SetPWM3 GpioDataRegs.GPADAT.bit.GPIOA2 = 1
#define ClrPWM3 GpioDataRegs.GPADAT.bit.GPIOA2 = 0
// Prototype statements for functions found within this file.
interrupt void eva_timer1_isr(void);
void init_eva_timer1(void);
void main(void)
{
InitSysCtrl();
DINT;
InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags:
IER = 0x0000;
IFR = 0x0000;
InitPieVectTable();
EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.T1PINT = &eva_timer1_isr;
EDIS; // This is needed to disable write to EALLOW protected registers
init_eva_timer1();
EALLOW;
GpioMuxRegs.GPFDIR.bit.GPIOF14 = 1;
GpioMuxRegs.GPAMUX.all = 0x0000; ///A口当IO口用，实际上只用到PA2~PA5 四根口线
GpioMuxRegs.GPADIR.all = 0x00ff; ///A口低8位全当输出
EDIS;
// Enable CPU INT2 which is connected to EVA TIMER 1 INT:
IER |= M_INT2;
// Enable EVAPINt in the PIE: Group 2 interrupt 4
PieCtrlRegs.PIEIER2.bit.INTx4 = 1;
// Enable global Interrupts and higher priority real-time debug events:
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
// Step 6. IDLE loop. Just sit and loop forever (optional):
for(;;){};
}
void init_eva_timer1()
{
EvaRegs.T1PR = EVA_TIMER_PRD; // Period
EvaRegs.EVAIMRA.bit.T1PINT = 1;
EvaRegs.EVAIFRA.bit.T1PINT = 1;
// Clear the counter for GP timer 1
EvaRegs.T1CNT = 0x0000;
// Count up, x128, internal clk, enable compare, use own period
EvaRegs.T1CON.all = 0x1740;
}
interrupt void eva_timer1_isr(void)
{
// Toggle LED
GpioDataRegs.G PFTOGGLE.bit.GPIOF14 = 1;
flag1++;
if( flag1 == 1 )
{
*LED0 = 0x00;
*Ext_IO_L=0x0000;
SetPWM3;
}
if( flag1 == 2 )
{
*LED0 = 0xff;
*Ext_IO_L=0xffff;
*Ext_IO_H=0xffff;
SetPWM3;
flag1 = 0;
}
EvaRegs.EVAIFRA.all = BIT7;
// Acknowledge interrupt to receive more interrupts from PIE group 2
PieCtrlRegs.PIEACK.all = PIEACK_GROUP2;
}
CMD 部分如下：
/*** Initialized Sections ***/
.cinit : LOAD = FLASH_AB, PAGE = 0 /* Load section to Flash */
RUN = RAM_H0, PAGE = 0 /* Run section from RAM */
LOAD_START(_cinit_loadstart),
RUN_START(_cinit_runstart),
SIZE(_cinit_size)
.const : LOAD = FLASH_AB, PAGE = 0 /* Load section to Flash */
RUN = RAM_H0, PAGE = 0 /* Run section from RAM */
LOAD_START(_const_loadstart),
RUN_START(_const_runstart),
SIZE(_const_size)
.econst : LOAD = FLASH_AB, PAGE = 0 /* Load section to Flash */
RUN = RAM_H0, PAGE = 0 /* Run section from RAM */
LOAD_START(_econst_loadstart),
RUN_START(_econst_runstart),
SIZE(_econst_size)
.pinit : LOAD = FLASH_AB, PAGE = 0 /* Load section to Flash */
RUN = RAM_H0, PAGE = 0 /* Run section from RAM */
LOAD_START(_pinit_loadstart),
RUN_START(_pinit_runstart),
SIZE(_pinit_size)
.switch : LOAD = FLASH_AB, PAGE = 0 /* Load section to Flash */
RUN = RAM_H0, PAGE = 0 /* Run section from RAM */
LOAD_START(_switch_loadstart),
RUN_START(_switch_runstart),
SIZE(_switch_size)
.text : LOAD = FLASH_AB, PAGE = 0 /* Load section to Flash */
RUN = RAM_L0L1, PAGE = 0 /* Run section from RAM */
LOAD_START(_text_loadstart),
RUN_START(_text_runstart),
SIZE(_text_size)
}
文件：
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