ti_cc_spi.c

利用MSP430F2121单片机控制无线模块CC2500的一个演示程序。

    IFG2 &= ~UCA1RXIFG;                     // Clear flag
    UCA1TXBUF = value;                      // Send data
    while (!(IFG2&UCA1RXIFG));              // Wait for TX to finish
    TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;       // /CS disable
}

void TI_CC_SPIWriteBurstReg(char addr, char *buffer, char count)
{
    unsigned int i;

    TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;      // /CS enable
    while (TI_CC_SPI_USCIA1_PxIN&TI_CC_SPI_USCIA1_SOMI);// Wait for CCxxxx ready
    IFG2 &= ~UCA1RXIFG;
    UCA1TXBUF = addr | TI_CCxxx0_WRITE_BURST;// Send address
    while (!(IFG2&UCA1RXIFG));              // Wait for TX to finish
    for (i = 0; i < count; i++)
    {
      IFG2 &= ~UCA1RXIFG;
      UCA1TXBUF = buffer[i];                // Send data
      while (!(IFG2&UCA1RXIFG));            // Wait for TX to finish
    }
    //while (!(IFG2&UCA1RXIFG));
    TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;       // /CS disable
}

char TI_CC_SPIReadReg(char addr)
{
  char x;

  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (!(IFG2&UCA1TXIFG));                // Wait for TX to finish
  UCA1TXBUF = (addr | TI_CCxxx0_READ_SINGLE);// Send address
  while (!(IFG2&UCA1TXIFG));                // Wait for TX to finish
  UCA1TXBUF = 0;                            // Dummy write so we can read data
  // Address is now being TX'ed, with dummy byte waiting in TXBUF...
  while (!(IFG2&UCA1RXIFG));                // Wait for RX to finish
  // Dummy byte RX'ed during addr TX now in RXBUF
  IFG2 &= ~UCA1RXIFG;                       // Clear flag set during addr write
  while (!(IFG2&UCA1RXIFG));                // Wait for end of dummy byte TX
  // Data byte RX'ed during dummy byte write is now in RXBUF
  x = UCA1RXBUF;                            // Read data
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable

  return x;
}

void TI_CC_SPIReadBurstReg(char addr, char *buffer, char count)
{
  char i;

  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (TI_CC_SPI_USCIA1_PxIN&TI_CC_SPI_USCIA1_SOMI);// Wait for CCxxxx ready
  IFG2 &= ~UCA1RXIFG;                       // Clear flag
  UCA1TXBUF = (addr | TI_CCxxx0_READ_BURST);// Send address
  while (!(IFG2&UCA1TXIFG));                // Wait for TXBUF ready
  UCA1TXBUF = 0;                            // Dummy write to read 1st data byte
  // Addr byte is now being TX'ed, with dummy byte to follow immediately after
  while (!(IFG2&UCA1RXIFG));                // Wait for end of addr byte TX
  IFG2 &= ~UCA1RXIFG;                       // Clear flag
  while (!(IFG2&UCA1RXIFG));                // Wait for end of 1st data byte TX
  // First data byte now in RXBUF
  for (i = 0; i < (count-1); i++)
  {
    UCA1TXBUF = 0;                          //Initiate next data RX, meanwhile..
    buffer[i] = UCA1RXBUF;                  // Store data from last data RX
    while (!(IFG2&UCA1RXIFG));              // Wait for RX to finish
  }
  buffer[count-1] = UCA1RXBUF;              // Store last RX byte in buffer
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable
}

char TI_CC_SPIReadStatus(char addr)
{
  char x;

  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (TI_CC_SPI_USCIA1_PxIN & TI_CC_SPI_USCIA1_SOMI);// Wait for CCxxxx ready
  IFG2 &= ~UCA1RXIFG;                       // Clear flag set during last write
  UCA1TXBUF = (addr | TI_CCxxx0_READ_BURST);// Send address
  while (!(IFG2&UCA1RXIFG));                // Wait for TX to finish
  IFG2 &= ~UCA1RXIFG;                       // Clear flag set during last write
  UCA1TXBUF = 0;                            // Dummy write so we can read data
  while (!(IFG2&UCA1RXIFG));                // Wait for RX to finish
  x = UCA1RXBUF;                            // Read data
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable

  return x;
}

void TI_CC_SPIStrobe(char strobe)
{
  IFG2 &= ~UCA1RXIFG;                       // Clear flag
  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (TI_CC_SPI_USCIA1_PxIN&TI_CC_SPI_USCIA1_SOMI);// Wait for CCxxxx ready
  UCA1TXBUF = strobe;                       // Send strobe
  // Strobe addr is now being TX'ed
  while (!(IFG2&UCA1RXIFG));                // Wait for end of addr TX
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable
}

void TI_CC_PowerupResetCCxxxx(void)
{
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;
  TI_CC_Wait(30);
  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;
  TI_CC_Wait(30);
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;
  TI_CC_Wait(45);

  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (TI_CC_SPI_USCIA1_PxIN&TI_CC_SPI_USCIA1_SOMI);// Wait for CCxxxx ready
  UCA1TXBUF = TI_CCxxx0_SRES;               // Send strobe
  // Strobe addr is now being TX'ed
  IFG2 &= ~UCA1RXIFG;                       // Clear flag
  while (!(IFG2&UCA1RXIFG));                // Wait for end of addr TX
  while (TI_CC_SPI_USCIA1_PxIN&TI_CC_SPI_USCIA1_SOMI);
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable
}


#elif TI_CC_RF_SER_INTF == TI_CC_SER_INTF_USCIB0


void TI_CC_SPISetup(void)
{
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;
  TI_CC_CSn_PxDIR |= TI_CC_CSn_PIN;         // /CS disable

  UCB0CTL0 |= UCMST+UCCKPL+UCMSB+UCSYNC;    // 3-pin, 8-bit SPI master
  UCB0CTL1 |= UCSSEL_2;                     // SMCLK
  UCB0BR0 |= 0x02;                          // UCLK/2
  UCB0BR1 = 0;
  //UCB0MCTL = 0;
  TI_CC_SPI_USCIB0_PxSEL |= TI_CC_SPI_USCIB0_SIMO | TI_CC_SPI_USCIB0_SOMI | TI_CC_SPI_USCIB0_UCLK;
                                            // SPI option select
  TI_CC_SPI_USCIB0_PxDIR |= TI_CC_SPI_USCIB0_SIMO | TI_CC_SPI_USCIB0_UCLK;
                                            // SPI TXD out direction
  UCB0CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
}

void TI_CC_SPIWriteReg(char addr, char value)
{
    TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;      // /CS enable
    while (TI_CC_SPI_USCIB0_PxIN&TI_CC_SPI_USCIB0_SOMI);// Wait for CCxxxx ready
    IFG2 &= ~UCB0RXIFG;                     // Clear flag
    UCB0TXBUF = addr;                       // Send address
    while (!(IFG2&UCB0RXIFG));              // Wait for TX to finish
    IFG2 &= ~UCB0RXIFG;                     // Clear flag
    UCB0TXBUF = value;                      // Send data
    while (!(IFG2&UCB0RXIFG));              // Wait for TX to finish
    TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;       // /CS disable
}

void TI_CC_SPIWriteBurstReg(char addr, char *buffer, char count)
{
    unsigned int i;

    TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;      // /CS enable
    while (TI_CC_SPI_USCIB0_PxIN&TI_CC_SPI_USCIB0_SOMI);// Wait for CCxxxx ready
    IFG2 &= ~UCB0RXIFG;
    UCB0TXBUF = addr | TI_CCxxx0_WRITE_BURST;// Send address
    while (!(IFG2&UCB0RXIFG));              // Wait for TX to finish
    for (i = 0; i < count; i++)
    {
      IFG2 &= ~UCB0RXIFG;
      UCB0TXBUF = buffer[i];                // Send data
      while (!(IFG2&UCB0RXIFG));            // Wait for TX to finish
    }
    //while (!(IFG2&UCB0RXIFG));
    TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;       // /CS disable
}

char TI_CC_SPIReadReg(char addr)
{
  char x;

  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (!(IFG2&UCB0TXIFG));                // Wait for TX to finish
  UCB0TXBUF = (addr | TI_CCxxx0_READ_SINGLE);// Send address
  while (!(IFG2&UCB0TXIFG));                // Wait for TX to finish
  UCB0TXBUF = 0;                            // Dummy write so we can read data
  // Address is now being TX'ed, with dummy byte waiting in TXBUF...
  while (!(IFG2&UCB0RXIFG));                // Wait for RX to finish
  // Dummy byte RX'ed during addr TX now in RXBUF
  IFG2 &= ~UCB0RXIFG;                       // Clear flag set during addr write
  while (!(IFG2&UCB0RXIFG));                // Wait for end of dummy byte TX
  // Data byte RX'ed during dummy byte write is now in RXBUF
  x = UCB0RXBUF;                            // Read data
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable

  return x;
}

void TI_CC_SPIReadBurstReg(char addr, char *buffer, char count)
{
  char i;

  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (TI_CC_SPI_USCIB0_PxIN&TI_CC_SPI_USCIB0_SOMI);// Wait for CCxxxx ready
  IFG2 &= ~UCB0RXIFG;                       // Clear flag
  UCB0TXBUF = (addr | TI_CCxxx0_READ_BURST);// Send address
  while (!(IFG2&UCB0TXIFG));                // Wait for TXBUF ready
  UCB0TXBUF = 0;                            // Dummy write to read 1st data byte
  // Addr byte is now being TX'ed, with dummy byte to follow immediately after
  while (!(IFG2&UCB0RXIFG));                // Wait for end of addr byte TX
  IFG2 &= ~UCB0RXIFG;                       // Clear flag
  while (!(IFG2&UCB0RXIFG));                // Wait for end of 1st data byte TX
  // First data byte now in RXBUF
  for (i = 0; i < (count-1); i++)
  {
    UCB0TXBUF = 0;                          //Initiate next data RX, meanwhile..
    buffer[i] = UCB0RXBUF;                  // Store data from last data RX
    while (!(IFG2&UCB0RXIFG));              // Wait for RX to finish
  }
  buffer[count-1] = UCB0RXBUF;              // Store last RX byte in buffer
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable
}

char TI_CC_SPIReadStatus(char addr)
{
  char x;

  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (TI_CC_SPI_USCIB0_PxIN & TI_CC_SPI_USCIB0_SOMI);// Wait for CCxxxx ready
  IFG2 &= ~UCB0RXIFG;                       // Clear flag set during last write
  UCB0TXBUF = (addr | TI_CCxxx0_READ_BURST);// Send address
  while (!(IFG2&UCB0RXIFG));                // Wait for TX to finish
  IFG2 &= ~UCB0RXIFG;                       // Clear flag set during last write
  UCB0TXBUF = 0;                            // Dummy write so we can read data
  while (!(IFG2&UCB0RXIFG));                // Wait for RX to finish
  x = UCB0RXBUF;                            // Read data
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable

  return x;
}

void TI_CC_SPIStrobe(char strobe)
{
  IFG2 &= ~UCB0RXIFG;                       // Clear flag
  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (TI_CC_SPI_USCIB0_PxIN&TI_CC_SPI_USCIB0_SOMI);// Wait for CCxxxx ready
  UCB0TXBUF = strobe;                       // Send strobe
  // Strobe addr is now being TX'ed
  while (!(IFG2&UCB0RXIFG));                // Wait for end of addr TX
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable
}

void TI_CC_PowerupResetCCxxxx(void)
{
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;
  TI_CC_Wait(30);
  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;
  TI_CC_Wait(30);
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;
  TI_CC_Wait(45);

  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (TI_CC_SPI_USCIB0_PxIN&TI_CC_SPI_USCIB0_SOMI);// Wait for CCxxxx ready
  UCB0TXBUF = TI_CCxxx0_SRES;               // Send strobe
  // Strobe addr is now being TX'ed
  IFG2 &= ~UCB0RXIFG;                       // Clear flag
  while (!(IFG2&UCB0RXIFG));                // Wait for end of addr TX
  while (TI_CC_SPI_USCIB0_PxIN&TI_CC_SPI_USCIB0_SOMI);
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable
}


#elif TI_CC_RF_SER_INTF == TI_CC_SER_INTF_USCIB1


void TI_CC_SPISetup(void)
{
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;
  TI_CC_CSn_PxDIR |= TI_CC_CSn_PIN;         // /CS disable

  UCB1CTL0 |= UCMST+UCCKPL+UCMSB+UCSYNC;    // 3-pin, 8-bit SPI master
  UCB1CTL1 |= UCSSEL_2;                     // SMCLK
  UCB1BR0 |= 0x02;                          // UCLK/2
  UCB1BR1 = 0;
  UCB1MCTL = 0;
  TI_CC_SPI_USCIB1_PxSEL |= TI_CC_SPI_USCIB1_SIMO | TI_CC_SPI_USCIB1_SOMI | TI_CC_SPI_USCIB1_UCLK;
                                            // SPI option select
  TI_CC_SPI_USCIB1_PxDIR |= TI_CC_SPI_USCIB1_SIMO | TI_CC_SPI_USCIB1_UCLK;
                                            // SPI TXD out direction
  UCB1CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
}

void TI_CC_SPIWriteReg(char addr, char value)
{
    TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;      // /CS enable
    while (TI_CC_SPI_USCIB1_PxIN&TI_CC_SPI_USCIB1_SOMI);// Wait for CCxxxx ready
    IFG2 &= ~UCB1RXIFG;                     // Clear flag
    UCB1TXBUF = addr;                       // Send address
    while (!(IFG2&UCB1RXIFG));              // Wait for TX to finish
    IFG2 &= ~UCB1RXIFG;                     // Clear flag
    UCB1TXBUF = value;                      // Send data
    while (!(IFG2&UCB1RXIFG));              // Wait for TX to finish
    TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;       // /CS disable
}

void TI_CC_SPIWriteBurstReg(char addr, char *buffer, char count)
{
    unsigned int i;

    TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;      // /CS enable
    while (TI_CC_SPI_USCIB1_PxIN&TI_CC_SPI_USCIB1_SOMI);// Wait for CCxxxx ready
    IFG2 &= ~UCB1RXIFG;
    UCB1TXBUF = addr | TI_CCxxx0_WRITE_BURST;// Send address
    while (!(IFG2&UCB1RXIFG));              // Wait for TX to finish
    for (i = 0; i < count; i++)
    {
      IFG2 &= ~UCB1RXIFG;
      UCB1TXBUF = buffer[i];                // Send data
      while (!(IFG2&UCB1RXIFG));            // Wait for TX to finish
    }
    //while (!(IFG2&UCB1RXIFG));
    TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;       // /CS disable
}

char TI_CC_SPIReadReg(char addr)
{
  char x;

  TI_CC_CSn_PxOUT &= ~TI_CC_CSn_PIN;        // /CS enable
  while (!(IFG2&UCB1TXIFG));                // Wait for TX to finish
  UCB1TXBUF = (addr | TI_CCxxx0_READ_SINGLE);// Send address
  while (!(IFG2&UCB1TXIFG));                // Wait for TX to finish
  UCB1TXBUF = 0;                            // Dummy write so we can read data
  // Address is now being TX'ed, with dummy byte waiting in TXBUF...
  while (!(IFG2&UCB1RXIFG));                // Wait for RX to finish
  // Dummy byte RX'ed during addr TX now in RXBUF
  IFG2 &= ~UCB1RXIFG;                       // Clear flag set during addr write
  while (!(IFG2&UCB1RXIFG));                // Wait for end of dummy byte TX
  // Data byte RX'ed during dummy byte write is now in RXBUF
  x = UCB1RXBUF;                            // Read data
  TI_CC_CSn_PxOUT |= TI_CC_CSn_PIN;         // /CS disable

  return x;
}

void TI_CC_SPIReadBurstReg(char addr, char *buffer, char count)
{
  char i;