rs232_anychar.c

来自「s1mp3 sdk, action mp3 develop tool kit!」· C语言 代码 · 共 17 行

#include "drivers\rs232.h"

extern port_info_s port_info[];

int RS232_Anychar( void )
{
	int temp;

	temp = port_info->input_insert - port_info->input_remove;

	return temp < 0 ? temp + RS232_BUFFERSIZE : temp;
}