UART操作的程序.doc

UART操作的程序 佚名 / 2008-09-18 T3C25-V5 仅售880元 UART操作的程序 作者：转载 #include config.h /*define UARTs data structure*/typedef struct UartMode{ uint8 datab; // byte length uint8 stopb; // stop bit,1/2 uint8 parity; // parity bit setting}UARTMODE; uint8 rcv_buf[8];uint8 rcv_byte[8];volatile uint8 add_data_num;volatile uint8 rcv_new; //flag for rcving new datavolatile uint8 add_data; void __irq IRQ_UART0(void){ uint8 i; if ((U0IIR 0x0F) == 0x04) { rcv_new = 1; for (i = 0; i8; i++) { rcv_buf[i] = U0RBR; } }  // read all the data in FIFO once. Then there is no too much interruptions if ((U0IIR 0xF) == 0x0C) { add_data_num = 0; while (U0LSR 0// Read UARTs LSR register first,  { // and determine whether FIFO is empty add_data = 1; // or not. rcv_byte[add_data_num] = U0RBR; add_data_num++; } }  VICVectAddr = 0x00;} void UART0_SendByte(uint8 dat){ U0THR = dat;} void UART0_SendBuf(void){ uint8 i;  for (i=0; i8; i++) UART0_SendByte(rcv_buf[i]); while ((U0LSR 0x20) == 0) ;} void UART0_SendAddByte(uint8 j){ uint8 i; for (i = 0; ij; i++) UART0_SendByte(rcv_byte[i]);  while ((U0LSR 0x20) == 0) ; } int UART0_Init(uint32 baud, UARTMODE set){ uint32 bak;  if ((baud == 0)||(baud 115200)) return (0); if ((set.datab 5)||(set.datab 8)) return (0); if ((set.stopb == 0)||(set.stopb 2)) return (0); if (set.parity 4) return (0);  /*set UARTs baud rate*/ U0LCR = 0x80; //DLAB = 1 bak = (Fpclk 4)/baud; U0DLM = bak 8; U0DLL = bak 0xFF;  /*set UARTs mode*/ bak = set.datab - 5; if (set.stopb == 2) bak |= 0x04;  if (set.parity != 0) { set.parity = set.parity - 1; bak |= 0x08; }  bak |= set.parity 4;  U0LCR = bak;  return (1); } int main (void){// add user source code  UARTMODE set;  set.datab = 8; set.stopb = 1; set.parity = 0;  rcv_new = 0;  PINSEL0 = (PINSEL0 0xFFFFFFF0) | 0x5;  UART0_Init(115200, set); U0FCR = 0x81; U0IER = 0x01;  IRQE