led.c

PEAKAUDIO用于EV2板的MCU控制源码

/*************************************************************************

	Led.c

	These are the line command routines to control the three LEDs on the 
	CobraNet evaluation board.

	Line command supported: LED

	Copyright (C) 2001-2004 by Cirrus Logic Inc. All Rights Reserved
*************************************************************************/

#include <stdio.h>
#include <intrpt.h>
#include <8051.h>
#include <string.h>
#include "serial.h"
#include "cnmutil.h"
#include "command.h"
#include "test.h"
#include "error.h"
#include "command.h"
#include "mystrings.h"
#include "led.h"

void led_help( char detailed );
void led_execute( unsigned char color_selection, unsigned char op_selection );
void led( char * com_arg_ptr[] );

code struct command_item_t led_command = {
	( code char * ) str_Com_led,
	( code command_function_t ) led
};

void led( char * com_arg_ptr[] )	{
	unsigned char color_ch;
	unsigned char operation_ch;

	if ( com_arg_ptr[ 1 ] == NULL )	//look for the command without arguments
		led_help( cHELP_SHORT );
	else	{
		if ( *com_arg_ptr[ 1 ] == '?' )
			led_help( cHELP_LONG );
		else
			if ( com_arg_ptr[ 2 ] == NULL )
				printErrString( get_error_string( cERR_MISSING_ARG ) );
			else	{
				color_ch = 0;
				while ( ( strCodecmp( led_color_arguments[ color_ch ], 
															com_arg_ptr[ 1 ] ) ) &&
														( led_color_arguments[ color_ch ] != NULL ) )
					color_ch++;
				if ( led_color_arguments[ color_ch ] == NULL )
					printErrString( get_error_string( cERR_ARGUMENT ) );
				else	{
					operation_ch = 0;
					while ( ( strCodecmp( led_operation_arguments[ operation_ch ], 
																									com_arg_ptr[ 2 ] ) ) &&
								( led_operation_arguments[ operation_ch ] != NULL ) )
						operation_ch++;
					if ( led_operation_arguments[ operation_ch ] == NULL )
							printErrString( get_error_string( cERR_ARGUMENT ) );
					else
						led_execute( color_ch, operation_ch );
				}
			}
	}
}

void led_execute( unsigned char color_selection, 
								  unsigned char op_selection )	{
	unsigned char led_num;
	unsigned char led_op_num = 1;
	unsigned char local_color = color_selection;

	if ( color_selection == cCOLOR_ALL )
		led_op_num = cCOLOR_ALL;
	for (led_num = 0; led_num < led_op_num; led_num++ )	{
		if ( color_selection == cCOLOR_ALL )
			local_color = led_num;
		switch( op_selection )	{
			case opLEDON:
				LED_Operation( local_color, cLED_ON );
				break;
			case opLEDOFF:
				LED_Operation( local_color, cLED_OFF );
				break;
			case opBLINKON:
				LED_Operation( local_color + cBLINK_OFFSET, cBLINK_ON );
				break;
			case opBLINKOFF:
				LED_Operation( local_color + cBLINK_OFFSET, cBLINK_OFF );
				break;
			case opTOGGLE:
				LED_Toggle( local_color );
				break;
			default:
				break;
		};	//switch
	}
}


extern void LED_Operation( unsigned char which_led, 
													 unsigned char which_operation )	{
  char * LED_ptr = ( char * ) ( cLED_ptr + which_led );

  *( LED_ptr ) = which_operation;
}

extern void LED_Toggle( unsigned char which_led )	{
  char * LED_ptr = ( char * ) ( cLED_ptr + which_led );
  unsigned char current_LED_state;     

  current_LED_state = *LED_ptr;
  *LED_ptr = ~current_LED_state;
}

void led_help( char detailed )	{
	printStrCodeC( led_str_help1 );
	if ( detailed )
		printStrCodeC( led_str_help2 );
}