misc.c

瑞萨M16C编写的模拟PS2主机与标准键盘通讯程序.完整的工程文件,测试可用.

// Miscellaneous microcontroller functions

#include "misc.h"
#include "machine.h"
#include <ctype.h>
#include <string.h>

// This code will be placed in the fixed memory area
//#pragma SECTION program fixed_program

// Delays for (aproximately) the specified number of microseconds
// Input: d - delay time in us
void delay( u16 d ) 
{
	u16 i;

	for ( i = 0; i < d; i ++ ) 
	{
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();
		nop();		
	}
}

// Transform a string to lower case
// Input: pstr - the string
void strlower( char *pstr )
{
  u16 i;
  
  for( i = 0; i < strlen( pstr ); i ++ )
    pstr[ i ] = tolower( pstr[ i ] );
}