cc2540通过spi控制外扩AD

只看该作者 · 2012-5-29 21:51

单位的一个项目，cc2540外扩一个AD芯片采集数据，spi接口通信，Ti提供的demo里面没有spi驱动，所以在lcd基础上改动了一下，运行后，示波器测量SCK引脚没有信号呢？
U1DBUF寄存器里面时钟显示为0x00，求大侠们帮助看看，急~

void halENC28J60_SPI_Init(void)
{
    //*********USART1,Alternative 2****************
PERCFG |= 0x02;       // PERCFG.U1CFG = 1
P1SEL |= 0xE0;       // P1_7, P1_6, and P1_5 are peripherals
P1SEL &= ~0x10;       // P1_4 is GPIO (SSN)
P1DIR |= 0x10;       // SSN is set as output

  // init_Baudrate
  //********** Set baud rate to 9600*************
U1BAUD = 0x3B; // BAUD_M = 59
U1GCR &= 0xA0; // Positive clock polarity; MOSI @ __/^^ clk; MSB first
U1GCR |= 0x08; // BAUD_E = 8

// SPI Master Mode
U1CSR &= 0x01;

// Configure phase, polarity, and bit order
U1GCR |= 0x80;       // CPOL = 1
U1GCR |= 0x20;       // ORDER = 1

P1_4 = 1;

while(1)
{
   HalENC28J60_HW_WriteByte(0x11);
}

}
/**************************************************************************************************
* @fn    HalENC28J60_HW_WriteByte
*
* @brief Write 1 byte to the ENC28J60
*
* @param uint8 data - data to be written to the ENC28J60
*
* @return  None
**************************************************************************************************/
void HalENC28J60_HW_WriteByte(uint8 data)
{
  ENC28J60_SPI_BEGIN();
  ENC28J60_SPI_TX(data);
  ENC28J60_SPI_WAIT_RXRDY();
  ENC28J60_SPI_END();
}