430f5529关于ucb的iic模式的问题，一直无法正常使用，求助

Jiaxin Su 说：

连的设备是淘宝随便买的一个oled的屏幕

连线为UCB1的两个口

代码是照着官方例程改的，但就是跑不通，只进入过一次tx的中断，后来就卡住了，再也进不了第二个tx中断了，一直弄不懂是什么原因，用模拟iic就没问题

希望有用过5529的大神帮助一下

#include "driverlib.h"
#include "liblist.h"

#define OLED_ADDRESS  (0x78)
#define OLED_CMD  0
#define OLED_DATA 1

void fill_picture(unsigned char fill_Data);
void OLED_Init(void);
void OLED_WR_Byte(unsigned char dat,unsigned char cmd);

unsigned char iicfinish=0;
unsigned char iicdata[10];
unsigned char iiccounter=0;
unsigned int kk=0;
int main(void) {

    WDT_A_hold(WDT_A_BASE);     //关闭看门狗

    SYSCLK_hfinitclock();     //配置系统时钟
              //MCLK  24MHz SMCLK 1MHz
              //ACLK 32.768KHz

    P4SEL |= BIT1+BIT2;      //设置P4.1与P4.2为特殊功能寄存器
    P4REN |= BIT1+BIT2;
    P4OUT |= BIT1+BIT2;
   // P3SEL |= 0x03;
    UCB1CTL1 |= UCSWRST;        //允许UCB1配置被修改
    UCB1CTL0 = UCMST + UCMODE_3 + UCSYNC;   // I2C 主机, 同步模式
    UCB1CTL1 = UCSSEL_2 + UCSWRST;          // 选择SMCLK, 保持 SW 重置状态
    UCB1BR0 = 12;                           // fSCL = SMCLK/10 = ~100kHz
    UCB1BR1 = 0;
    UCB1I2CSA = OLED_ADDRESS;               // 从机地址，默认初始化为oled地址
    UCB1CTL1 &= ~UCSWRST;                   // 清除SW重置,完成操作

    OLED_Init();
    fill_picture(1);
    while(1)
     ;
}

void OLED_WR_Byte(unsigned char dat,unsigned char cmd)
{
    UCB1CTL1 |= UCTR;
    USCI_B_I2C_clearInterrupt(USCI_B1_BASE,USCI_B_I2C_TRANSMIT_INTERRUPT);
    UCB1IE &= ~UCRXIE;                        // Disable RX interrupt
    UCB1IE |= UCTXIE;                         // Enable TX interrupt
    while(UCB1STAT & UCBBUSY);
 kk++;
 iiccounter=2;
 if(cmd)
  iicdata[1]=0x40;
 else
  iicdata[1]=0x00;
 iicdata[0]=dat;
 UCB1CTL1 |= UCTXSTT;
 __bis_SR_register(LPM0_bits + GIE);
 while (UCB1CTL1 & UCTXSTP);
}

void OLED_Init(void)
{

    OLED_WR_Byte(0xAE,OLED_CMD);
 OLED_WR_Byte(0x00,OLED_CMD);
 OLED_WR_Byte(0x10,OLED_CMD);
 OLED_WR_Byte(0x40,OLED_CMD);
 OLED_WR_Byte(0xB0,OLED_CMD);
 OLED_WR_Byte(0x81,OLED_CMD);
 OLED_WR_Byte(0xFF,OLED_CMD);
 OLED_WR_Byte(0xA1,OLED_CMD);
 OLED_WR_Byte(0xA6,OLED_CMD);
 OLED_WR_Byte(0xA8,OLED_CMD);
 OLED_WR_Byte(0x3F,OLED_CMD);
 OLED_WR_Byte(0xC8,OLED_CMD);
 OLED_WR_Byte(0xD3,OLED_CMD);
 OLED_WR_Byte(0x00,OLED_CMD);

 OLED_WR_Byte(0xD5,OLED_CMD);
 OLED_WR_Byte(0x80,OLED_CMD);

 OLED_WR_Byte(0xD8,OLED_CMD);
 OLED_WR_Byte(0x05,OLED_CMD);

 OLED_WR_Byte(0xD9,OLED_CMD);
 OLED_WR_Byte(0xF1,OLED_CMD);

 OLED_WR_Byte(0xDA,OLED_CMD);
 OLED_WR_Byte(0x12,OLED_CMD);

 OLED_WR_Byte(0xDB,OLED_CMD);
 OLED_WR_Byte(0x30,OLED_CMD);

 OLED_WR_Byte(0x8D,OLED_CMD);
 OLED_WR_Byte(0x14,OLED_CMD);

 OLED_WR_Byte(0xAF,OLED_CMD);
}

void fill_picture(unsigned char fill_Data)
{
 unsigned char m,n;
 for(m=0;m<8;m++)
 {
  OLED_WR_Byte(0xb0+m,0);
  OLED_WR_Byte(0x00,0);
  OLED_WR_Byte(0x10,0);
  for(n=0;n<128;n++)
   {
    OLED_WR_Byte(fill_Data,1);
   }
 }
}

#pragma vector = USCI_B1_VECTOR
__interrupt void USCI_B1_ISR(void)
{
   switch(UCB1IV)
   {
   case  0: break;                           // Vector  0: No interrupts
   case  2: break;                           // Vector  2: ALIFG
   case  4: break;                           // Vector  4: NACKIFG
   case  6: break;                           // Vector  6: STTIFG
   case  8: break;                           // Vector  8: STPIFG
   case 10: break;                           // Vector 10: RXIFG
   case 12:     // Vector 12: TXIFG
     if(iiccounter)                             // Check TX byte counter
     {
      UCB1TXBUF=iicdata[iiccounter-1];
      iiccounter--;
     }
     else
     {
      iicfinish=1;
         UCB1CTL1 |= UCTXSTP;
         UCB1IFG &= ~UCTXIFG;
         __bic_SR_register_on_exit(LPM0_bits);
     }
     break;
   default: break;
   }
}

有没有示波器，抓个波形分析一下原因。