rs232_putchar.c

来自「s1mp3 sdk, action mp3 develop tool kit!」· C语言 代码 · 共 21 行

#include "drivers\rs232.h"

extern port_info_s port_info[];

void RS232_Putchar( unsigned char c )
{
    int  temp;

    temp = (port_info->output_insert + 1) & RS232_BUFFERMASK;

    if(temp == port_info->output_remove) /*buffer full */
        return;		/*  so end    */

    port_info->output_buffer[port_info->output_insert] = c;
    port_info->output_insert = temp;
}