hal_uart.c

来自「该程序在IAR Embedded Workbench for MSP4303.4」· C语言 代码 · 共 30 行

#include "include.h"

//----------------------------------------------------------------------------
// Functions for sending debug strings to a UART.  Although the same interfaces
// defined for SPI (USARTn, USCIxn, USI, and bit-bang) could be used for UART,
// only USART0/1 are defined.
//----------------------------------------------------------------------------

void halUARTSetup(void)
{
  P2SEL |= 0x010;                           // P2.4 = USCI_A0 TXD
  UCA0CTL1 |= UCSSEL_2;                     // SMCLK
  UCA0BR0 = 0x6D;                           // 1MHz 9600
  UCA0BR1 = 0x00;                           // 1MHz 9600
  UCA0MCTL = 4;                             // Modulation
  UCA0CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
  IE2 |= UCA0RXIE;                          // Enable USCI_A0 RX interrupt
}

void blastString(char string[], unsigned int len)
{
  volatile unsigned int i;

  for(i=0;i<len;i++)
  {
    while (!(IFG2 & UCA0TXIFG));            // USART1 TX buffer ready?
    UCA0TXBUF  = string[i];                 // Output character
  }
}