cc2530 spi例程

2万 · 2011-11-3 10:44

本帖最后由 sinanjj 于 2011-11-5 13:38 编辑

// master
#include <ioCC2530.h>
void main()
{
      CLKCONCMD = 0x80; while (CLKCONSTA != 0x80);       // 32MHz
      // SPI Master Mode
      PERCFG |= 0x02;       // map USART1 to its alternative 2 location. P1_4: SSN, P1_5: SCK, P1_6: MOSI, P1_7: MISO
      P1SEL |= 0xE0;       // P1_5, P1_6, and P1_7 are peripherals
      P1SEL &= ~0x10;       // P1_4 is GPIO (SSN)
      P1DIR |= 0x10;       // SSN is set as output

      U1BAUD = 0x00; U1GCR |= 0x11;       // Set baud rate to max (system clock frequency / 8)
      U1CSR &= ~0xA0;       // SPI Master Mode
//       U1CSR &= ~0x80; U1CSR |= 0x20;       // SPI Slave Mode
      U1GCR &= ~0xC0; U1GCR |= 0x20;       // MSB

      for(;;) {
            P1_4 = 0;       // SSN LOW
            U1DBUF = 0x55; while (!(U1CSR&0x02)); U1CSR &= 0xFD;
            U1DBUF = 0x00; while (!(U1CSR&0x02)); U1CSR &= 0xFD;
            unsigned char temp = U1DBUF;
            P1_4 = 1;       // SSN high
      }
}

// slave
#include <ioCC2530.h>
void main()
{
      CLKCONCMD = 0x80; while (CLKCONSTA != 0x80);       // 32MHz
      PERCFG |= 0x02;       // map USART1 to its alternative 2 location. P1_4: SSN, P1_5: SCK, P1_6: MOSI, P1_7: MISO
      P1SEL |= 0xF0;       // P1_4, P1_5, P1_6, and P1_7 are peripherals

      U1BAUD = 0x00; U1GCR |= 0x11;       // Set baud rate to max (system clock frequency / 8)
      U1CSR &= ~0x80; U1CSR |= 0x20;       // SPI Slave Mode
      U1GCR &= ~0xC0; U1GCR |= 0x20;       // MSB

      for(;;) {
            U1DBUF = 0x88;
            while (!(U1CSR&0x04)); U1CSR &= 0xFB;
            unsigned char temp = U1DBUF;
      }
}