请教dsp串行通信失败问题

只看该作者 · 2010-1-2 20:40

求dsp串行通信失败原因以及解决方案。运行通信程序（之前可以正常通信的程序），生成文件时出现附件图片中的提示。请各位大侠给予指点，不胜感激。

只看该作者 · 2010-1-2 20:49

这样不好分析，我觉得最好把程序列出来让大家分析一下啊。

只看该作者 · 2010-1-2 20:49

貌似CMD或者gel没有弄好

只看该作者 · 2010-1-3 01:19

貌似要分配一个50个0值的已初始化数据到地址0x8127，是不是0x8127的空间分配的用途不一致。

只看该作者 · 2010-1-4 10:15

下边是我的dsp2808 sci通信程序：

//////*******************MADE BY WEI XIA ****************앞에 포트3 나 커넥터 포트6******************//////
////////////access using assembler///////////////

#define DINT asm(" setc INTM")  // Role: remove interrupt
#define EINT asm(" clrc INTM")  //    restore interrupt
#define EALLOW  asm(" EALLOW")    //    remove protection
#define EDIS asm(" EDIS")    //    restore protection

//////////watchdog///////////////
#define XCLK    0x7010
#define WDCR    0x7029  // Name: Watchdog control register
#define WDKEY    0x7025  //    Watchdog reset key register
#define PLLCR    0x7021  // Pll control register
#define PCLKCR0 0x701C
#define PCLKCR1    0x701D  // Peripheral Clock Control Register
#define HISPCP    0x701A  // High-Speed Peripheral Clock Prescaler Register for HSPCLK clock
#define LOSPCP    0x701B  // Low-Speed Peripheral Clock Prescaler Register for LSPCLK clock

//////////SCI-A Registers///////

#define SCICCRA 0x7050
#define SCICTL1A 0x7051
#define SCIHBAUDA  0x7052
#define SCILBAUDA  0x7053
#define SCICTL2A 0x7054
#define SCIRXSTA 0x7055
#define SCIRXBUFA  0x7057
#define SCITXBUFA  0x7059

/////////////GPIO//////////////

#define GPAMUX1 0x6F86
#define GPAMUX2 0x6F88

#define GPADIR    0x6F8A
#define GPADAT    0x6FC0
/*
#define GPFMUX    0x70D4
#define GPFDIR    0x70D5
#define GPFDAT    0x70F4
*/
#define BIT_MASK(x) (1 << (x))
#define GetBit(val, bit) (((val) & BIT_MASK(bit))>>(bit))
#define SetBit(val, bit) ((val) |= BIT_MASK(bit))
//#define Togglebit(val, bit)       (( val) ^ = BIT_MASK(bit) )

void InitSysCtrl(void) /// initialize system function ///
{

int iVol;

asm(" EALLOW") ; // EALLOW;

// ENABLE WATCH-DOG
*(volatile unsigned int *)WDCR |= 0x0068;
// *(volatile unsigned int *)WDCR |= 0x002D;
// *(volatile unsigned int *)WDKEY = 0x0055;
// *(volatile unsigned int *)WDKEY = 0x00AA;

// PLLCR -> 0x0A == x5 ==> Sysclk : 20MHzx5 = 100MHz
*(volatile unsigned int *)PLLCR = 0x0A;

// Initialize the peripheral clocks [InitPeripheralClocks]

*(volatile unsigned int *)HISPCP = 0x0003;

// McBSP,SCI,SPI
// Our System don't care
// McBSP,SCI는 사용하지 않고, SPC는 외부 Clock을 사용하므로 상관없다.
*(volatile unsigned int *)LOSPCP = 0x0002; //20*5/(2*2)
//LSPCLK의 분주 비율을 정하는 레지스터,리셋후 기분값은010으로 CPU클럭을 4분주해서사용한다.  divide 4 ( P5-49)

// bit8: SPI, bit3: ADC, SCIA(10),SCIB(11)
// bit1: EVT.B, bit0: EVT.A
*(volatile unsigned int *)XCLK|=0x0003;//XCLKOUT off
*(volatile unsigned int *)PCLKCR0= 0xFFFF;
*(volatile unsigned int *)PCLKCR1= 0xFFFF;    // 0101 1101 0000 1011
  /* SysCtrlRegs.PCLKCR.bit.ECANENCLK=1;//14bit
   SysCtrlRegs.PCLKCR.bit.EVAENCLK=1;//0bit
   SysCtrlRegs.PCLKCR.bit.EVBENCLK=1;//1bit
   SysCtrlRegs.PCLKCR.bit.SCIAENCLK=1;//10bit
   SysCtrlRegs.PCLKCR.bit.SCIBENCLK=1;//11bit
   SysCtrlRegs.PCLKCR.bit.MCBSPENCLK=1;//12bit
   SysCtrlRegs.PCLKCR.bit.SPIENCLK=1;//8bit
   SysCtrlRegs.PCLKCR.bit.ADCENCLK=1;//3bit

*/

   asm(" EDIS"); //EDIS;

for(iVol= 0; iVol< 5000; iVol++);
}


InitScia_for_RS232C(void)
{
   ///////핀 설정////////
asm(" EALLOW") ;//EALLOW;

    *(volatile unsigned long *)GPAMUX2 |=0x05000000;
    *(volatile unsigned long *)GPAMUX2 &=0xF5FFFFFF;


asm(" EDIS"); //EDIS;

////// SCI 설정 //////////
  *(volatile unsigned int *)SCICCRA=0x0007; // 1 stop bit,  No loopback
                              // No parity,8 char bits,
                              // async mode, idle-line protocol
  *(volatile unsigned int *)SCICTL1A=0x0003;  // enable RX, TX, internal SCICLK,
                              // Disable RX ERR, SLEEP, TXWAKE,

  *(volatile unsigned int *)SCIHBAUDA = 0x01;    //BRR 0x0144=324    통신속도(bps)= 9600 bps
  *(volatile unsigned int *)SCILBAUDA = 0x44;

SetBit(*(volatile unsigned int *)SCICTL1A,5);    // Relinquish SCI from Reset
}

void scia_Tx(char);
char scia_Rx(void);

// Global variables
char temp;

void main(void)
{
asm(" setc INTM"); // DINT;

InitSysCtrl();

InitScia_for_RS232C();  // Init SCI-A

asm(" EALLOW") ; // EALLOW;    // remove protection

      *(volatile unsigned int *)GPAMUX1 = 0x0055;  // GPIO A, 0 ~ 15,  I/O (0=GPIO, 1= Not GPIO)

*(volatile unsigned int *)GPADIR = 0xFFFF; // GPIO A, 0 ~  7,  Output (0=input, 1=output)
*(volatile unsigned int *)GPADAT = 0xF4FF; // 0 ~ 7, Output → High로 Set. (0=Low, 1=High)
asm(" EDIS"); // EDIS;

asm(" clrc INTM");//EINT;

while(1)
{
temp = scia_Rx();
if(temp== 'a')
      (*(volatile unsigned int *)GPADAT)^=0xFFFF;//A포트 0~7비트 반전 시킨다.
scia_Tx(temp);
}

}

char scia_Rx(void)
{
char data;
while(!(GetBit(*(volatile unsigned int *)SCIRXSTA, 6))); //SCIRXST( 수신 상태 레지스터),RXRDY=0,수신 버퍼에 새론운 데이터가 없다.
data = *(volatile unsigned int *)SCIRXBUFA;    //SCIRXBUF(수신 데이터 버퍼 레지스터)는 수신한 데이터가 저장된는 공간이다.  Read data
return data;
}

void scia_Tx(char data)
{
while(!(GetBit(*(volatile unsigned int *)SCICTL2A,7))); //SCICTLA(SCI제어 레지스터),TXRDY=0,SCITXBUF에 전송해야 할 데이터가 남아 있음.
*(volatile unsigned int *)SCITXBUFA = data & 0x00FF; //SCITXBUFA(전송 데이터 버퍼 레지스터)는 전송할 데이터를 넣어두는 공간이다.
}

//===========================================================================
// No more.
//===========================================================================

希望大家给予帮助~~