各位大哥们。小弟初次使用stm8，用的是stm8s-discovery板子。
用固件库v2.0的例子中的uart-printf。编译通过。可是结果不对，是乱码。。大哥们给分析下，什么原因啊！！！！！！！
/**
******************************************************************************
* @file UART1_Printf\main.c
* @brief This file contains the main function for: retarget the C library printf
* /scanf functions to the UART1 example.
* @author MCD Application Team
* @version V2.0.0
* @date 25-February-2011
******************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm8s.h"
#include "stdio.h"
/**
* @addtogroup UART1_Printf
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#ifdef _RAISONANCE_
#define PUTCHAR_PROTOTYPE int putchar (char c)
#define GETCHAR_PROTOTYPE int getchar (void)
#elif defined (_COSMIC_)
#define PUTCHAR_PROTOTYPE char putchar (char c)
#define GETCHAR_PROTOTYPE char getchar (void)
#else /* _IAR_ */
#define PUTCHAR_PROTOTYPE int putchar (int c)
#define GETCHAR_PROTOTYPE int getchar (void)
#endif /* _RAISONANCE_ */
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program.
* @param None
* @retval None
*/
void main(void)
{
char ans;
/*High speed internal clock prescaler: 1*/
CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);
UART2_DeInit();
/* UART1 configuration ------------------------------------------------------*/
/* UART1 configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Receive and transmit enabled
- UART1 Clock disabled
*/
UART2_Init((uint32_t)115200, UART2_WORDLENGTH_8D, UART2_STOPBITS_1, UART2_PARITY_NO,
UART2_SYNCMODE_CLOCK_DISABLE, UART2_MODE_TXRX_ENABLE);
UART2_Cmd(ENABLE);
/* Output a message on Hyperterminal using printf function */
printf("\n\rUART1 Example :retarget the C library printf()/getchar() functions to the UART\n\r");
printf("\n\rEnter Text\n\r");
while (1)
{
ans = getchar();
printf("%c", ans);
}
}
/**
* @brief Retargets the C library printf function to the UART.
* @param c Character to send
* @retval char Character sent
*/
PUTCHAR_PROTOTYPE
{
/* Write a character to the UART1 */
UART2_SendData8(c);
/* Loop until the end of transmission */
while (UART2_GetFlagStatus(UART2_FLAG_TXE) == RESET);
return (c);
}
/**
* @brief Retargets the C library scanf function to the USART.
* @param None
* @retval char Character to Read
*/
GETCHAR_PROTOTYPE
{
#ifdef _COSMIC_
char c = 0;
#else
int c = 0;
#endif
/* Loop until the Read data register flag is SET */
while (UART2_GetFlagStatus(UART2_FLAG_RXNE) == RESET);
c = UART2_ReceiveData8();
return (c);
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |
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