今天刚拿到板子，马上焊了最小系统，连上JATG程序下载正常，利用系统的时钟编写了一个定时器中断交替点亮2个LED的程序。程序在瑞泰2812实验箱上运行正常，可以在LED的驱动引脚上得到一个方波信号。说明程序运行正常，可以驱动LED灯闪烁运行。程序下载到开发板运行，给DSP供电的电源芯片ASM1117-5开始温度升高。运行程序，灯没有被驱动。发现2812芯片，与2812芯片供电电源芯片ASM1117-5温度升高到烫手,给外设供电的ASM1117-5没有发现温度大幅升高。给发迅速停止程序运行，芯片温度降低。可以推测为在2812开始运行时，电源芯片电流急剧增大。
附录程序
#include "DSP281x_Device.h" // DSP281x Headerfile Include File
#include "DSP281x_Examples.h" // DSP281x Examples Include File
// 中断服务程序函数原型声明
interrupt void cpu_timer0_isr(void);
//*定义的各个外设寄存器的地址*//
#define LEDS *(int *)0xc0000
//#define CTRGR *(int *)0x108000
//#define CTRLCDCMDR *(int *)0x108001
//#define CTRKEY *(int *)0x108001
//#define CTRLCDCR *(int *)0x108002
//#define CTRCLKEY *(int *)0x108002
//#define CTRLCDLCR *(int *)0x108003
//#define CTRLCDRCR *(int *)0x108004
//#define CTRLA *(int *)0x108005
//#define CTRLR *(int *)0x108007
#define LED1_ON GpioDataRegs.GPFDAT.bit.GPIOF6=0
#define LED1_OFF GpioDataRegs.GPFDAT.bit.GPIOF6=1
#define LED2_ON GpioDataRegs.GPFDAT.bit.GPIOF7=0
#define LED2_OFF GpioDataRegs.GPFDAT.bit.GPIOF7=1
void Gpio_select(void);
//声明全局变量
int i=0,nCount;
unsigned int uLBD,z;
void main(void)
{
// unsigned int uPort8000;
InitSysCtrl(); //初始化cpu
DINT; //关中断
InitPieCtrl(); //初始化pie寄存器
IER = 0x0000; //禁止所有的中断
IFR = 0x0000; //清除所有的中断标志CPU级
InitPieVectTable(); //初始化pie中断向量表，使中断指向可知状态
EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.TINT0 = &cpu_timer0_isr; //指定中断服务子程序
EDIS; // This is needed to disable write to EALLOW protected registers
CpuTimer0.RegsAddr = &CpuTimer0Regs;
CpuTimer0Regs.PRD.all = 0xffff; //定时计数器最大周期
CpuTimer0Regs.TPR.all = 0x0010; //定时器预定标寄存器，4分频
CpuTimer0Regs.TIM.all = 0; //定时计数器
CpuTimer0Regs.TPRH.all = 0; //定时器预定标寄存器
// 确定定时器停止:
CpuTimer0Regs.TCR.bit.TSS = 1; //定时器停止状态位，停止
CpuTimer0Regs.TCR.bit.SOFT = 1; //CPU定时器仿真模式（自由运行）
CpuTimer0Regs.TCR.bit.FREE = 1; //CPU定时器仿真模式（自由运行）
// 重新使能定时器:
CpuTimer0Regs.TCR.bit.TRB = 1; //定时器重新装载控制位
CpuTimer0Regs.TCR.bit.TIE = 1; //定时器中断使能位
// 初始化定时器中断计数器:
CpuTimer0.InterruptCount = 0; //定时器中断计数器
StartCpuTimer0(); //启动定时器0
// Enable CPU INT1 which is connected to CPU-Timer 0:
IER |= M_INT1;
// Enable TINT0 in the PIE: Group 1 interrupt 7
PieCtrlRegs.PIEIER1.bit.INTx7 = 1;
// Enable global Interrupts and higher priority real-time debug events:
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
//CTRGR=0; // 初始化ICETEK-CTR
//CTRGR=0x80;
//CTRGR=0;
//CTRLR=0; // 关闭东西方向的交通灯
//CTRLR=0x40; // 关闭南北方向的交通灯
//uPort8000=CTRCLKEY;
// Gpio_select(); // Toggle I/Os using DATA register for ever
while ( 1 )
{
Gpio_select(); // Toggle I/Os using DATA register for ever
}
}
//interrupt void cpu_timer0_isr(void)
//{ //int j,k;
// z = CpuTimer0.InterruptCount++;
// Acknowledge this interrupt to receive more interrupts from group 1
// PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; //清除中断标志
// CpuTimer0Regs.TCR.bit.TIF = 1; //重启,计数器递减到零时会置位，定时器中断标志
// CpuTimer0Regs.TCR.bit.TRB = 1; //定时器重新装载PRD寄存器周期值，
//并且PSC装载定时器分频寄存器TDDR中的值
// if ( nCount==0 )
// {
// LEDS=uLBD;
// uLBD++; uLBD%=16;
// }
// nCount++; nCount%=194; //取余运算
//}
void Gpio_select(void)
{
EALLOW;
GpioMuxRegs.GPAMUX.all= 0x0330; //设置GPIOA9,8,5,4为外设功能，4，5为PWM,8,9为编码器解码;
GpioMuxRegs.GPBMUX.all= 0x0300; //设置GPIOB8,9为外设功能，8，9为编码器解码;
GpioMuxRegs.GPDMUX.all= 0x0000; //设置为GPIO
GpioMuxRegs.GPFMUX.all= 0x003F; //设置GPIOF5,4为SCI,设置GPIOF3，2，1，0为SPI;
GpioMuxRegs.GPEMUX.all= 0x0000; //设置为GPIO
GpioMuxRegs.GPGMUX.all= 0x0030; //设置GPIOG5,4为SCI;
GpioMuxRegs.GPADIR.all= 0; // GPIO作为输出口
GpioMuxRegs.GPBDIR.all= 0x0012; // GPIOB2,4作为输入口
GpioMuxRegs.GPDDIR.all= 0;
GpioMuxRegs.GPEDIR.all= 0x0003; // GPIOE0,1作为输入口
GpioMuxRegs.GPFDIR.all= 0;
GpioMuxRegs.GPGDIR.all= 0;
GpioMuxRegs.GPAQUAL.all= 0; // Set GPIO input qualifier values
GpioMuxRegs.GPBQUAL.all= 0;
GpioMuxRegs.GPDQUAL.all= 0;
GpioMuxRegs.GPEQUAL.all= 0;
EDIS;
}
//===========================================================================
// No more.
//========================================
//实验现象：LED灯约每0.1S变化一下状态
unsigned int Led_Flag;
interrupt void cpu_timer0_isr(void)
{
CpuTimer0.InterruptCount++;
// Acknowledge this interrupt to receive more interrupts from group 1
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; //清除中断标志
CpuTimer0Regs.TCR.bit.TIF = 1; //重启,计数器递减到零时会置位，定时器中断标志
CpuTimer0Regs.TCR.bit.TRB = 1; //定时器重新装载PRD寄存器周期值，
//并且PSC装载定时器分频寄存器TDDR中的值
if(Led_Flag == 1)
{
LED2_OFF;
LED1_ON;
Led_Flag = 0;
}
else
{
LED2_ON;// = 1;
LED1_OFF;
Led_Flag = 1;
}
} |
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