XINTF写数据无响应,附上短程序请版主跟各位朋友帮看看

只看该作者 · 2016-3-7 21:09

现在需要使用28335的XINTF去对一并行外设发出控制信号。但在我配置好xintf和gpio之后。给zone7的地址赋值。。。却是没有反应。我用示波器观测D0口，如果程序正常的话此引脚应该输出的是方波，但我观测到的只是3.3V的高电平
void main(void)

{

short temp=0;

InitSysCtrl();

DINT;

IER=0x0000;

IFR=0x0000;

InitPieCtrl();

InitPieVectTable();

initledgpio();

init_zone7();

LED1off;

LED2off;

while(1)

{

temp++;

if(temp==1)

{

uint16* p=(uint16*)0x20000

*p=0x00000001;

LED1on;

LED2off;

}

if(temp==2)

{

temp=0;

uint16* p=(uint16*)0x20000

*p=0x00000001;

LED1off;

LED2on;

}

delay(10000);

}

void init_zone7(void)

{

EALLOW;

SysCtrlRegs.PCLKCR3.bit.XINTFENCLK = 1;

InitXintf16Gpio();

XintfRegs.XINTCNF2.bit.XTIMCLK = 0;

XintfRegs.XINTCNF2.bit.WRBUFF = 3;

XintfRegs.XINTCNF2.bit.CLKOFF = 0;

XintfRegs.XINTCNF2.bit.CLKMODE = 0;

XintfRegs.XTIMING7.bit.XWRLEAD = 1;//写建立等待状态周期=1XTIMCLK

XintfRegs.XTIMING7.bit.XWRACTIVE = 2;//写激活等待周期=2XTIMCLK

XintfRegs.XTIMING7.bit.XWRTRAIL = 1;//写追踪等待周期=1XTIMCLK

XintfRegs.XTIMING7.bit.XRDLEAD = 1;//读建立等待状态周期=1XTIMCLK

XintfRegs.XTIMING7.bit.XRDACTIVE = 3;//读激活等待周期=3XTIMCLK

XintfRegs.XTIMING7.bit.XRDTRAIL = 0;//读追踪等待周期=0XTIMCLK

XintfRegs.XTIMING7.bit.X2TIMING = 0;

XintfRegs.XTIMING7.bit.USEREADY = 0;

XintfRegs.XTIMING7.bit.READYMODE = 0;

// 1,1 = x16 数据线（采用）

// 0,1 = x32 数据线

XintfRegs.XTIMING7.bit.XSIZE = 3;

EDIS；

//占用N+1个指令周期

asm(" RPT #7 || NOP");

}

2万 · 2016-3-7 21:58

void init_zone7(void)
{

// Make sure the XINTF clock is enabled
SysCtrlRegs.PCLKCR3.bit.XINTFENCLK = 1;

// Configure the GPIO for XINTF with a 16-bit data bus
// This function is in DSP2833x_Xintf.c
InitXintf16Gpio();
EALLOW;
// All Zones---------------------------------
// Timing for all zones based on XTIMCLK = SYSCLKOUT
XintfRegs.XINTCNF2.bit.XTIMCLK = 0;
// Buffer up to 3 writes
XintfRegs.XINTCNF2.bit.WRBUFF = 3;
// XCLKOUT is enabled
XintfRegs.XINTCNF2.bit.CLKOFF = 0;
// XCLKOUT = XTIMCLK
XintfRegs.XINTCNF2.bit.CLKMODE = 0;

// 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 = 1;
XintfRegs.XTIMING7.bit.XWRACTIVE = 2;
XintfRegs.XTIMING7.bit.XWRTRAIL = 1;
// Zone read timing
XintfRegs.XTIMING7.bit.XRDLEAD = 1;
XintfRegs.XTIMING7.bit.XRDACTIVE = 3;
XintfRegs.XTIMING7.bit.XRDTRAIL = 0;

// don't double all Zone read/write lead/active/trail timing
XintfRegs.XTIMING7.bit.X2TIMING = 0;

// Zone will not sample XREADY signal
XintfRegs.XTIMING7.bit.USEREADY = 0;
XintfRegs.XTIMING7.bit.READYMODE = 0;

// 1,1 = x16 data bus
// 0,1 = x32 data bus
// other values are reserved
XintfRegs.XTIMING7.bit.XSIZE = 3;
EDIS;

//Force a pipeline flush to ensure that the write to
//the last register configured occurs before returning.
asm(" RPT #7 || NOP");
}