EEPW论坛

问 【讨论】谁能告诉我一下FE427的串口通信初始化参数吗？我用的是研讨会上的实验板。现在想做串口通讯，可是参考书上的关键字是按F149来设置的，我找到光盘上没有FE427系列的，只有F449之类的。恳请DX们帮助！！ 答 1: void Init(void)
{
UCTL1 &=~SWRST;
UCTL1=0x10;
UBR01=0x03;
UBR11=0x00;
UMCTL1=0x4A;
UTCTL1=0x10;
ME2 |=0x20;
P3SEL=0x40;
P3DIR=0x40;

书上是这样的。 答 2: void InitUART(unsigned long baud)
{
//UART
// Configure USART in UART mode, 8-bit, 1-stop, no parity.
// Hold logic in reset state while configuring other registers

UCTL0 = (0*PENA) // 7 Parity Enable 0=Disabled
|(0*PEV) // 6 Parity Select 0= Odd
|(0*SPB) // 5 Stop Bit Select 0= 1 Stop bit
|(1*CHAR) // 4 Character Length 1= 8-bit data
|(0*LISTEN) // 3 Loopback control 0= Loopback disabled
|(0*SYNC) // 2 Synchronous Mode 0= UART mode
|(0*MM) // 1 Multiprocessor Mode 0= Idle-line multiproc control
|(1*SWRST); // 0 Software Reset 1= Logic Held in Reset State ...
// while configuring other registers

switch(baud)
{
case 9600:
UTCTL0 = SSEL0; // UCLK = ACLK
UBR00 = 0x03; // 32k/9600
UBR10 = 0x00; //
UMCTL0 = 0x4a; //
break;

case 19200:
UTCTL0 = SSEL1; // UCLK = SMCLK
UBR00 = 0xDA; // 4MHz/19200
UBR10 = 0x00; //
UMCTL0 = 0x55; //
break;
case 57600:
UTCTL0 = SSEL1; // UCLK = SMCLK
UBR00 = 0x48; // 4Mhz/57600
UBR10 = 0x00; //
UMCTL0 = 0x7B; //
break;
case 115200:
UTCTL0 = SSEL1; // UCLK = SMCLK
UBR00 = 0x24; // 4Mhz/115.2k
UBR10 = 0x00; //
UMCTL0 = 0x29; //
break;
default:
break;
}
U0ME |= UTXE0+URXE0 ; // Enabled USART0 TXD/RXD

P2SEL |= (BIT4 + BIT5); // P2.4,5 = USART0 TXD/RXD
P2DIR |= BIT4; // P2.4 output direction

U0IFG &= ~URXIFG0; // Clear USART0 RX interrupt flag

UCTL0 &= ~(SWRST); // 8-bit character - clr SWRST bit

// U0IE |= URXIE0+UTXIE0; // Enable USART0 RX + TX interrupt
U0IE |= URXIE0; // Enable USART0 RX interrupt
} 答 3: 太谢谢啦，要是我产品成功调试出来，我会意思意思的。：）