Microchip Studio 7.0 Printf 输出浮点格式数据

#define PRINT

 

/*

* printf 重定向

  初始化串口后需要执行  stdout = &mystdout;

*/

#ifdef PRINT

static int uart_putchar(char c, FILE *stream);

static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL,_FDEV_SETUP_WRITE);

static int uart_putchar(char c, FILE *stream)  //自定义的putchar

{

                while(!(UCSRA&0x20)); 

                UDR = c;

           return 0;

}

#endif