请教F28M35 I2C 调试

只看该作者 · 2014-4-27 21:55

有谁用过F28M35？
我在用61IC的I2C 例程来调试TI的Concerto_F28M35xx_control_CARD，我手上也有61IC的开发板，因为没有仿真器目前，所以只能调试TI的了。
TI的板子用的是PB6 PB7， 61IC用的是PB2 PB3。
我把例程中相应的改为PB6 PB7，并且，GPIOPINUNLOCK了PB7。
但是结果始终不对，READDATA始终和WRITEDATA不对。
不知道问题出在哪，没有很多时间从DATASHEET慢慢的找问题。

希望高手能指点。

谢谢。

下面是我的代码：
#include "inc/hw_i2c.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "inc/hw_sysctl.h"
#include "driverlib/gpio.h"
#include "driverlib/i2c.h"
#include "driverlib/interrupt.h"
#include "driverlib/sysctl.h"
#include "driverlib/debug.h"

#define ID_I2C_ADDR             0x50

static tBoolean
WriteData(unsigned char ucAddr, unsigned char ucData);
static tBoolean
ReadData(unsigned char *pucData, unsigned long ulOffset,
               unsigned long ulCount);
int main(void)
{
unsigned char pucData[8]={'a','b','c','d','e','f','g','h'};
unsigned char dat[8];
unsigned char i;
unsigned char value1, value2, value3, value4;
// Disable Protection
HWREG(SYSCTL_MWRALLOW) =  0xA5A5A5A5;

// Setup main clock tree for 75MHz - M3 and 150MHz - C28x
SysCtlClockConfigSet(SYSCTL_SYSDIV_1 | SYSCTL_M3SSDIV_2 | SYSCTL_USE_PLL |
                     (SYSCTL_SPLLIMULT_M & 0x0F));

SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);                      /*  使能I2C外设                */
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);                      /*  使能GPIO外设             */
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);

// Disable clock supply for the watchdog modules
SysCtlPeripheralDisable(SYSCTL_PERIPH_WDOG1);
SysCtlPeripheralDisable(SYSCTL_PERIPH_WDOG0);

IntMasterEnable();                                                 /*  使能处理器中断             */

GPIOPinTypeGPIOOutput(GPIO_PORTC_BASE, GPIO_PIN_6);
GPIOPinTypeGPIOOutput(GPIO_PORTC_BASE, GPIO_PIN_7);

GPIOPinUnlock(GPIO_PORTB_BASE, GPIO_PIN_7);
//GPIOPinUnlock(GPIO_PORTB_BASE, GPIO_PIN_6);

//GPIOPinConfigure(GPIO_PB2_I2C0SCL);
//GPIOPinConfigure(GPIO_PB3_I2C0SDA);
GPIOPinConfigure(GPIO_PB7_I2C0SCL);
GPIOPinConfigure(GPIO_PB6_I2C0SDA);

//GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_2 | GPIO_PIN_3);
GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_6 | GPIO_PIN_7);

GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_6, ~0);
GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_7, ~0);

I2CMasterInitExpClk(I2C0_MASTER_BASE, SysCtlClockGet(
                        SYSTEM_CLOCK_SPEED), false);

// for(i=0;i<8;i++)
//       WriteData(0x08+i,pucData[i]);
ReadData(dat,0x08,8);
value1=dat[0];
value2=dat[1];
value3=dat[2];
value4=dat[3];
for(i=0;i<8;i++)
{
         if(dat[i]!=pucData[i])
         {
                  GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_6, 0);
                  while(1);
         }
}
GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_7, 0);
while(1);
}

void Delays (unsigned char no)
{
      int i, j;
      for ( ; no > 0; no--) {
            for (i = 0; i < 150; i++) {
                  for (j = 0; j < 255; j++);
            }
      }
}

static tBoolean
WaitI2CFinished(void)
{
//
// Wait until the current byte has been transferred.
//
while(I2CMasterIntStatus(I2C0_MASTER_BASE, false) == 0)
{
}

if(I2CMasterErr(I2C0_MASTER_BASE) != I2C_MASTER_ERR_NONE)
{
      I2CMasterIntClear(I2C0_MASTER_BASE);
      return(false);
}

//
// Clear any interrupts set.
//
while(I2CMasterIntStatus(I2C0_MASTER_BASE, false))
{
      I2CMasterIntClear(I2C0_MASTER_BASE);
}

return(true);
}

static tBoolean ReadData(unsigned char *pucData, unsigned long ulOffset,unsigned long ulCount)
{
unsigned long ulToRead;
I2CMasterIntClear(I2C0_MASTER_BASE);
I2CMasterSlaveAddrSet(I2C0_MASTER_BASE, ID_I2C_ADDR, false);
I2CMasterDataPut(I2C0_MASTER_BASE, ulOffset);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_START);
if(!WaitI2CFinished())
      return(false);
I2CMasterSlaveAddrSet(I2C0_MASTER_BASE, ID_I2C_ADDR, true);
I2CMasterControl(I2C0_MASTER_BASE,
                  ((ulCount > 1) ? I2C_MASTER_CMD_BURST_RECEIVE_START :
                  I2C_MASTER_CMD_SINGLE_RECEIVE));
ulToRead = ulCount;

while(ulToRead)
{
      while(I2CMasterIntStatus(I2C0_MASTER_BASE, false) == 0) { }
      I2CMasterIntClear(I2C0_MASTER_BASE);
      *pucData++ = I2CMasterDataGet(I2C0_MASTER_BASE);
      ulToRead--;
      if(ulToRead)
         I2CMasterControl(I2C0_MASTER_BASE,
                           ((ulToRead == 1) ?
                           I2C_MASTER_CMD_BURST_RECEIVE_FINISH :
                           I2C_MASTER_CMD_BURST_RECEIVE_CONT));
}
return(true);
}

static tBoolean WriteData(unsigned char ucAddr, unsigned char ucData)
{
I2CMasterIntClear(I2C0_MASTER_BASE);
I2CMasterSlaveAddrSet(I2C0_MASTER_BASE, ID_I2C_ADDR, false);
I2CMasterDataPut(I2C0_MASTER_BASE, ucAddr);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_START);
if(!WaitI2CFinished())
      return(false);
I2CMasterDataPut(I2C0_MASTER_BASE, ucData);
I2CMasterControl(I2C0_MASTER_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH);
if(!WaitI2CFinished())
      return(false);
// SysCtlDelay(SysCtlClockGet()/600 );
Delays(15);
return(true);
}

/*********************************************************************************************************
END FILE
*********************************************************************************************************/