STR710FZ2T6串口速率始终只有设定值的四分之一

只看该作者 · 2007-10-11 21:56

您好!
我用的是一块,别人送我的STR7的核心板.外部晶振4MHz.
使用的环境是KEIL 的MDK3.51版本。

现在运行KEIL自带的 KEIL/ARM/BOARDS/HITEX/ST_HELLO 程序,发现实际的波特率只有设定的1/4...

到底是哪里错了呢，请老大们赐教。

以下是main程序。

#include "71x_lib.h"

#define UART0_Rx_Pin (0x0001<<8)   /*  TQFP 64: pin N?63 , TQFP 144 pin N?143 */
#define UART0_Tx_Pin (0x0001<<9)   /*  TQFP 64: pin N?64 , TQFP 144 pin N?144 */

#define UART1_Rx_Pin (0x0001<<10)  /*  TQFP 64: pin N?1  , TQFP 144 pin N?1   */
#define UART1_Tx_Pin (0x0001<<11)  /*  TQFP 64: pin N?2  , TQFP 144 pin N?3   */

#define UART2_Rx_Pin (0x0001<<13)  /*  TQFP 64: pin N?5  , TQFP 144 pin N?9   */
#define UART2_Tx_Pin (0x0001<<14)  /*  TQFP 64: pin N?6  , TQFP 144 pin N?10  */

#define UART3_Rx_Pin (0x0001<<1)   /*  TQFP 64: pin N?52 , TQFP 144 pin N?123 */
#define UART3_Tx_Pin (0x0001<<0)   /*  TQFP 64: pin N?53 , TQFP 144 pin N?124 */

#define Use_UART3
//#define Use_UART1
//#define Use_UART2
//#define Use_UART3

   #ifdef Use_UART0
     #define  UARTX  UART0
     #define  UARTX_Rx_Pin  UART0_Rx_Pin
     #define  UARTX_Tx_Pin  UART0_Tx_Pin
     #define  UARTX_Periph  UART0_Periph
   #endif /* Use_UART0 */

   #ifdef Use_UART1
     #define  UARTX  UART1
     #define  UARTX_Rx_Pin  UART1_Rx_Pin
     #define  UARTX_Tx_Pin  UART1_Tx_Pin
     #define  UARTX_Periph  UART1_Periph
   #endif /* Use_UART1 */

   #ifdef Use_UART2
     #define  UARTX  UART2
     #define  UARTX_Rx_Pin  UART2_Rx_Pin
     #define  UARTX_Tx_Pin  UART2_Tx_Pin
     #define  UARTX_Periph  UART2_Periph
   #endif /* Use_UART2 */

   #ifdef Use_UART3
     #define  UARTX  UART3
     #define  UARTX_Rx_Pin  UART3_Rx_Pin
     #define  UARTX_Tx_Pin  UART3_Tx_Pin
     #define  UARTX_Periph  UART3_Periph
   #endif /* Use_UART3 */

u16 i;
u16 UARTStatus;
u8 bBuffer[4] = {'t','e','s','t'};
/* Example 1 */
int main(void)
{
  #ifdef DEBUG
    debug();
  #endif

/* UART configuration ---------------------------------------------------------- */

    /*  Configure the GPIO pins as alternate function push pull */
   GPIO_Config(GPIO0,UARTX_Tx_Pin, GPIO_AF_PP);
    /*  Configure the GPIO pins as Input Tristate CMOS */
   GPIO_Config(GPIO0,UARTX_Rx_Pin, GPIO_IN_TRI_CMOS);

/*  Configure the UART X --------------------------------------------------------*/
    /*  Turn UARTX on */
   UART_OnOffConfig(UARTX, ENABLE);

    /*  Disable FIFOs */
   UART_FifoConfig (UARTX, DISABLE);

    /*  Reset the UART_RxFIFO */
   UART_FifoReset(UARTX, UART_RxFIFO);

    /*  Reset the UART_TxFIFO */
   UART_FifoReset(UARTX, UART_TxFIFO);

    /*  Disable Loop Back */
   UART_LoopBackConfig(UARTX, DISABLE);

    /* Configure the UARTX as following:
      - Baudrate = 9600 Bps
      - No parity
      - 8 data bits
      - 1 stop bit */
   UART_Config(UARTX, 9600, UART_NO_PARITY, UART_1_StopBits, UARTM_8D);

    /*  Enable Rx */
   UART_RxConfig(UARTX, ENABLE);

  while(1)
  {
   for(i=0; i<4; i++)
     UART_ByteSend(UARTX,(u8 *)&bBuffer);

   }
}

只看该作者 · 2007-10-12 09:37

#ifndef __71x_CONF_H
#define __71x_CONF_H

/* Comment the line below to put the library in release mode */

#define RCCU_Main_Osc 0x16000000
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
这里的0x16000000改为0x4000000了没有？

/* Comment the lines below corresponding to unwanted peripherals */
//#define _ADC12

//#define _APB
//#define _APB1
//#define _APB2

//#define _BSPI
//#define _BSPI0
//#define _BSPI1

//#define _CAN

//#define _EIC

//#define _EMI

//#define _FLASH

#define _GPIO
#define _GPIO0
#define _GPIO1
#define _GPIO2

#define _I2C
#define _I2C0
#define _I2C1

#define _PCU

#define _RCCU

//#define _RTC

//#define _TIM
//#define _TIM0
//#define _TIM1
//#define _TIM2
//#define _TIM3

//#define _UART
//#define _UART0
//#define _UART1
//#define _UART2
//#define _UART3

//#define _USB

//#define _WDG

//#define _XTI

//#define _IRQVectors

#endif /* __71x_CONF_H */