急求大神帮着看看，中断问题

DSP

急求大神帮着看看，中断问题

2019-07-15 19:13发布

站内问答 / DSP

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#include "DSP28x_Project.h" // Device Headerfile and Examples Include
// Prototype statements for functions found within this file.
interrupt void cpu_timer2_isr(void);
interrupt void SCITXINTA_isr(void); //发送
interrupt void SCIRXINTA_isr(void); //接收
void scia_fifo_init(void);
void scia_init(void);
void scia_xmit(int a);
void scia_msg(char *msg);
void shurushuchu_Gpio_Init(void);
void toolInit(void);
void DelayMs(Uint16 ms);
// Global counts used in this example
Uint16 LoopCount;
Uint16 ErrorCount;
Uint16 ReceivedChar;
Uint16 SendChar;
void main(void)
{
InitSysCtrl();//初始化系统时钟，关闭看门狗等
InitSciaGpio();//初始化串口a使用的IO口
shurushuchu_Gpio_Init();//初始化输入io,输出io，以及485芯片发送接收使能io(485DIR)
DINT;//关闭中断
InitPieCtrl();//初始化中断控制器
IER = 0x0000;//禁止所有中断
IFR = 0x0000;//清除中断标志位
InitPieVectTable();//初始化中断向量表
EALLOW;//解除保护
PieVectTable.TINT2 = &cpu_timer2_isr;//将TINT2指向中断函数cpu_timer2_isr
PieVectTable.SCITXINTA= &SCITXINTA_isr;
PieVectTable.SCIRXINTA= &SCIRXINTA_isr;
//PieVectTable.SCITXINTA = &SCITXINTA_ISR;
EDIS; //关闭保护 , // 9.1 SCI-A
InitCpuTimers(); //初始化CPU计时器
ConfigCpuTimer(&CpuTimer2, 80, 80000); //80ms//
CpuTimer2Regs.TCR.all = 0x4001; // Use write-only instruction to set TSS bit = 0
/// IER |= M_INT1;// Enable CPU int1 which is connected to CPU-Timer 0,
IER |= M_INT9;// CPU int13 which is connected to CPU-Timer 1,
IER |= M_INT14;// CPU int 14, which is connected to CPU-Timer 2:
// Enable TINT0 in the PIE: Group 1 interrupt 7
PieCtrlRegs.PIECTRL.bit.ENPIE = 1;
PieCtrlRegs.PIEIER9.bit.INTx1 = 1;
PieCtrlRegs.PIEIER9.bit.INTx2= 1;
IER = 0x100; // Enable CPU INT
EINT; // Enable Global interrupt INTM 全局中断
/// ERTM; // Enable Global realtime interrupt DBGM
scia_fifo_init(); // 初始化串口a缓存模块
scia_init(); // 初始化串口
SciaRegs.SCIFFRX.bit.RXFFOVRCLR=1;//接收缓存溢出位清零
while(1)
{
}
}
void DelayMs(Uint16 ms)
{
Uint16 i;
for(i=0;i<ms;i++) DSP28x_usDelay(1000);
}
void scia_init()
{
SciaRegs.SCICCR.all =0x0007;
//bit7 0 一个停止位 1 俩个停止位
// 禁止奇偶校验
//bit4 0 禁止自测 1 自测
//bit3 空闲线多处理器模式
//字符长度 8位
SciaRegs.SCICTL1.all =0x0003; // enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
SciaRegs.SCICTL2.all =0x0003;
SciaRegs.SCICTL2.bit.TXINTENA =1;//使能发送准备中断
SciaRegs.SCICTL2.bit.RXBKINTENA =1;//使能接收准备中断
SciaRegs.SCIHBAUD =0x0001; // 9600 baud @LSPCLK = 20MHz.
SciaRegs.SCILBAUD =0x0003;
SciaRegs.SCICTL1.all =0x0023; //软件复位，重启SCI
SciaRegs.SCIFFTX.bit.TXFIFOXRESET=1;
SciaRegs.SCIFFRX.bit.RXFIFORESET=1;
}
void scia_xmit(int a) //发送字符
{
// while (ScibRegs.SCIFFTX.bit.TXFFST != 0) {}
SciaRegs.SCITXBUF=a;
}
void scia_msg(char * msg)//发送字符串
{
int i;
i = 0;
while(msg<i> != '')
{
scia_xmit(msg<i>);
i++;
}
}
// Initalize the SCI FIFO
void scia_fifo_init()
{
SciaRegs.SCIFFTX.all=0xC022;
SciaRegs.SCIFFRX.all=0x0022;
SciaRegs.SCIFFCT.all=0x00;
}
void shurushuchu_Gpio_Init(void)
{
EALLOW;
GpioCtrlRegs.GPAPUD.all = 0x000000000; //上拉
GpioDataRegs.GPASET.all = 0x0000001ff; //复位高电平
GpioCtrlRegs.GPAMUX1.all= 0x000000000; //配置为GPIO模式
GpioCtrlRegs.GPADIR.all = 0x00000010f; //配置为输出模式
EDIS;
}
interrupt void cpu_timer2_isr(void)
{
// DINT;//关闭总中断
CpuTimer2Regs.TCR.bit.TSS = 1;//停止定时器
CpuTimer2Regs.TCR.bit.TIF = 1;//清零中断标志位
EALLOW;
CpuTimer2.InterruptCount++;
EDIS;
GpioDataRegs.GPATOGGLE.bit.GPIO9=1;//翻转电平，切换接收发送模式
if(GpioDataRegs.GPADAT.bit.GPIO9==1){SendChar=GpioDataRegs.GPADAT.bit.GPIO4+2*GpioDataRegs.GPADAT.bit.GPIO5
+4*GpioDataRegs.GPADAT.bit.GPIO6+8*GpioDataRegs.GPADAT.bit.GPIO7;
//组合IO电平为0x 0 0 0 0 io7 io6 io5 io4
scia_xmit(SendChar);//发送字符
}
CpuTimer2Regs.TCR.bit.TRB = 1;//定时器重装
CpuTimer2Regs.TCR.bit.TSS = 0;//启动定时器
EINT; //开总中断
}
interrupt void SCIRXINTA_isr(void)
{
ReceivedChar = SciaRegs.SCIRXBUF.all;
GpioDataRegs.GPADAT.bit.GPIO0=~(ReceivedChar|0x01);//电平逻辑与控制逻辑相反；需要进行位取反运算
GpioDataRegs.GPADAT.bit.GPIO1=~(ReceivedChar|0x02);//电平逻辑与控制逻辑相反；需要进行位取反运算
GpioDataRegs.GPADAT.bit.GPIO2=~(ReceivedChar|0x04);//电平逻辑与控制逻辑相反；需要进行位取反运算
GpioDataRegs.GPADAT.bit.GPIO3=~(ReceivedChar|0x08);//电平逻辑与控制逻辑相反；需要进行位取反运算
SciaRegs.SCIFFRX.bit.RXFFINTCLR=1; // Clear SCI Interrupt flag
PieCtrlRegs.PIEACK.all|=0x100;
EINT; //开总中断
}
interrupt void SCITXINTA_isr(void)
{
if(GpioDataRegs.GPADAT.bit.GPIO9==1)
{SendChar=GpioDataRegs.GPADAT.bit.GPIO4+2*GpioDataRegs.GPADAT.bit.GPIO5
+4*GpioDataRegs.GPADAT.bit.GPIO6+8*GpioDataRegs.GPADAT.bit.GPIO7;
//组合IO电平为0x 0 0 0 0 io7 io6 io5 io4
scia_xmit(SendChar);//发送字符
}
SciaRegs.SCIFFTX.bit.TXFFINTCLR=1; // Clear SCI Interrupt flag
PieCtrlRegs.PIEACK.all|=0x100;
EINT; //开总中断
}
//===========================================================================
// No more.
//===========================================================================
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