round-robin-rtos - Round robin Scheduler

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Tim Exton-McGuinness / Mbed 2 deprecated round-robin-rtos

Round robin Scheduler

serial.c@0:cf2d4c337b6f, 2010-09-09 (annotated)

Committer:: timexton
Date:: Thu Sep 09 14:09:14 2010 +0000
Revision:: 0:cf2d4c337b6f

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User	Revision	Line number	New contents of line
timexton	0:cf2d4c337b6f	1	//serial port receiver interrupt handler
timexton	0:cf2d4c337b6f	2
timexton	0:cf2d4c337b6f	3	#include "globals.h"
timexton	0:cf2d4c337b6f	4
timexton	0:cf2d4c337b6f	5	Serial Terminal(p9, p10 );
timexton	0:cf2d4c337b6f	6
timexton	0:cf2d4c337b6f	7	extern "C" void sleep( void );
timexton	0:cf2d4c337b6f	8
timexton	0:cf2d4c337b6f	9	//---------------------------------------------------------------------
timexton	0:cf2d4c337b6f	10	extern "C" {
timexton	0:cf2d4c337b6f	11	void serial_rx_isr( void )
timexton	0:cf2d4c337b6f	12	{
timexton	0:cf2d4c337b6f	13	rxbuffer[rxwr++] = Terminal.getc(); //get character
timexton	0:cf2d4c337b6f	14	rxwr &= 0xff; //range check index
timexton	0:cf2d4c337b6f	15	}
timexton	0:cf2d4c337b6f	16	} //end of extern "C"
timexton	0:cf2d4c337b6f	17
timexton	0:cf2d4c337b6f	18	//-----------------------------------------------------
timexton	0:cf2d4c337b6f	19	extern "C" {
timexton	0:cf2d4c337b6f	20	int put_char( char c )
timexton	0:cf2d4c337b6f	21	{
timexton	0:cf2d4c337b6f	22	while( !Terminal.writeable() ) sleep();
timexton	0:cf2d4c337b6f	23	Terminal.putc(c);
timexton	0:cf2d4c337b6f	24	if ( c == 0xa )
timexton	0:cf2d4c337b6f	25	{
timexton	0:cf2d4c337b6f	26	while( !Terminal.writeable() ) sleep();
timexton	0:cf2d4c337b6f	27	Terminal.putc(0xd);
timexton	0:cf2d4c337b6f	28	}
timexton	0:cf2d4c337b6f	29
timexton	0:cf2d4c337b6f	30	return( c );
timexton	0:cf2d4c337b6f	31	}
timexton	0:cf2d4c337b6f	32	} //end of extern "C"
timexton	0:cf2d4c337b6f	33
timexton	0:cf2d4c337b6f	34	//-------------------------------------------
timexton	0:cf2d4c337b6f	35	extern "C" {
timexton	0:cf2d4c337b6f	36	void sleepy_write( char *ptr)
timexton	0:cf2d4c337b6f	37	{
timexton	0:cf2d4c337b6f	38	char c;
timexton	0:cf2d4c337b6f	39
timexton	0:cf2d4c337b6f	40	while( c = *ptr++ ) put_char( c );
timexton	0:cf2d4c337b6f	41	}
timexton	0:cf2d4c337b6f	42	} //end of extern "C"
timexton	0:cf2d4c337b6f	43
timexton	0:cf2d4c337b6f	44	//----------------------------------------------------------------------
timexton	0:cf2d4c337b6f	45	extern "C" {
timexton	0:cf2d4c337b6f	46	int get_char( void )
timexton	0:cf2d4c337b6f	47	{
timexton	0:cf2d4c337b6f	48	char c;
timexton	0:cf2d4c337b6f	49
timexton	0:cf2d4c337b6f	50	while( (rxwr == rxrd) ) sleep();
timexton	0:cf2d4c337b6f	51
timexton	0:cf2d4c337b6f	52	c = rxbuffer[rxrd++];
timexton	0:cf2d4c337b6f	53	rxrd &= 0xff; //keep in range
timexton	0:cf2d4c337b6f	54	return(c);
timexton	0:cf2d4c337b6f	55	}
timexton	0:cf2d4c337b6f	56	} //end of extern "C"
timexton	0:cf2d4c337b6f	57
timexton	0:cf2d4c337b6f	58	//-----------------------------------------------------------------------
timexton	0:cf2d4c337b6f	59	extern "C" {
timexton	0:cf2d4c337b6f	60	int peekchar( void )
timexton	0:cf2d4c337b6f	61	{
timexton	0:cf2d4c337b6f	62	if( rxwr == rxrd ) return(0);
timexton	0:cf2d4c337b6f	63	return(1);
timexton	0:cf2d4c337b6f	64	}
timexton	0:cf2d4c337b6f	65	} //end of extern "C"
timexton	0:cf2d4c337b6f	66
timexton	0:cf2d4c337b6f	67	//------------------------------------------------------
timexton	0:cf2d4c337b6f	68	extern "C" {
timexton	0:cf2d4c337b6f	69	void crlf( void )
timexton	0:cf2d4c337b6f	70	{
timexton	0:cf2d4c337b6f	71	put_char(0xa);
timexton	0:cf2d4c337b6f	72	put_char(0xd);
timexton	0:cf2d4c337b6f	73	}
timexton	0:cf2d4c337b6f	74	} //end of extern "C"
timexton	0:cf2d4c337b6f	75
timexton	0:cf2d4c337b6f	76	//------------------------------------------------------
timexton	0:cf2d4c337b6f	77	extern "C" {
timexton	0:cf2d4c337b6f	78	void spaces( unsigned char i )
timexton	0:cf2d4c337b6f	79	{
timexton	0:cf2d4c337b6f	80	if ( i > 0 ) {while(i--) put_char(0x20);}
timexton	0:cf2d4c337b6f	81	}
timexton	0:cf2d4c337b6f	82	} //end of extern "C"
timexton	0:cf2d4c337b6f	83
timexton	0:cf2d4c337b6f	84	//-----------------------------------------------------------------
timexton	0:cf2d4c337b6f	85	// parse text line, converting ' ' and 'CR' to NULL
timexton	0:cf2d4c337b6f	86	// returns global argv and argc parameters set accordingly
timexton	0:cf2d4c337b6f	87	extern "C" {
timexton	0:cf2d4c337b6f	88	void parse( char *ptr )
timexton	0:cf2d4c337b6f	89	{
timexton	0:cf2d4c337b6f	90	argc = 0;
timexton	0:cf2d4c337b6f	91	while( *ptr )
timexton	0:cf2d4c337b6f	92	{
timexton	0:cf2d4c337b6f	93	argv[argc++] = ptr; //record start of parameter string
timexton	0:cf2d4c337b6f	94	while(*ptr != ' ') ptr++;
timexton	0:cf2d4c337b6f	95	*ptr++ = 0;
timexton	0:cf2d4c337b6f	96	}
timexton	0:cf2d4c337b6f	97	}
timexton	0:cf2d4c337b6f	98	} //end of extern "C"
timexton	0:cf2d4c337b6f	99
timexton	0:cf2d4c337b6f	100	//-----------------------------------------------------------------------
timexton	0:cf2d4c337b6f	101	extern "C" {
timexton	0:cf2d4c337b6f	102	void readln( char *ptr )
timexton	0:cf2d4c337b6f	103	{
timexton	0:cf2d4c337b6f	104	char key;
timexton	0:cf2d4c337b6f	105	int count = 0;
timexton	0:cf2d4c337b6f	106
timexton	0:cf2d4c337b6f	107	while(1)
timexton	0:cf2d4c337b6f	108	{
timexton	0:cf2d4c337b6f	109	key = get_char();
timexton	0:cf2d4c337b6f	110
timexton	0:cf2d4c337b6f	111	if ( key == 0xd )
timexton	0:cf2d4c337b6f	112	{
timexton	0:cf2d4c337b6f	113	*ptr++ = 0x20;
timexton	0:cf2d4c337b6f	114	*ptr = 0;
timexton	0:cf2d4c337b6f	115	return;
timexton	0:cf2d4c337b6f	116	}
timexton	0:cf2d4c337b6f	117
timexton	0:cf2d4c337b6f	118	if ( key == 0x1b ) //esc
timexton	0:cf2d4c337b6f	119	{
timexton	0:cf2d4c337b6f	120	*ptr++ = 'q';
timexton	0:cf2d4c337b6f	121	*ptr++ = 0x20;
timexton	0:cf2d4c337b6f	122	*ptr = 0;
timexton	0:cf2d4c337b6f	123	// put_char(0xa);
timexton	0:cf2d4c337b6f	124	return;
timexton	0:cf2d4c337b6f	125	}
timexton	0:cf2d4c337b6f	126
timexton	0:cf2d4c337b6f	127	if ( key == 0x8 ) //delete
timexton	0:cf2d4c337b6f	128	{
timexton	0:cf2d4c337b6f	129	if ( count )
timexton	0:cf2d4c337b6f	130	{
timexton	0:cf2d4c337b6f	131	put_char( 0x8 );
timexton	0:cf2d4c337b6f	132	put_char( 0x20 );
timexton	0:cf2d4c337b6f	133	put_char( 0x8 );
timexton	0:cf2d4c337b6f	134	ptr--;
timexton	0:cf2d4c337b6f	135	count--;
timexton	0:cf2d4c337b6f	136	}
timexton	0:cf2d4c337b6f	137	}
timexton	0:cf2d4c337b6f	138	else
timexton	0:cf2d4c337b6f	139	{
timexton	0:cf2d4c337b6f	140	*ptr++ = key;
timexton	0:cf2d4c337b6f	141	count++;
timexton	0:cf2d4c337b6f	142	put_char( key );
timexton	0:cf2d4c337b6f	143	}
timexton	0:cf2d4c337b6f	144	}
timexton	0:cf2d4c337b6f	145	}
timexton	0:cf2d4c337b6f	146	} //end of extern "C"
timexton	0:cf2d4c337b6f	147
timexton	0:cf2d4c337b6f	148	//--------------------------------------------------------------------------
timexton	0:cf2d4c337b6f	149	extern "C" {
timexton	0:cf2d4c337b6f	150	void goxy( int x, int y)
timexton	0:cf2d4c337b6f	151	{
timexton	0:cf2d4c337b6f	152	sprintf(sl_buff,"%c[%d;%dH", 27, y, x); sleepy_write( sl_buff);
timexton	0:cf2d4c337b6f	153	}
timexton	0:cf2d4c337b6f	154	} //end of extern "C"
timexton	0:cf2d4c337b6f	155
timexton	0:cf2d4c337b6f	156	//--------------------------------------------------------------------------
timexton	0:cf2d4c337b6f	157	extern "C" {
timexton	0:cf2d4c337b6f	158	void cursor( int x, int y, int spaces )
timexton	0:cf2d4c337b6f	159	{
timexton	0:cf2d4c337b6f	160	goxy( x, y );
timexton	0:cf2d4c337b6f	161	while( spaces-- ) put_char( ' ' );
timexton	0:cf2d4c337b6f	162	goxy( x, y );
timexton	0:cf2d4c337b6f	163	}
timexton	0:cf2d4c337b6f	164	} //end of extern "C"
timexton	0:cf2d4c337b6f	165
timexton	0:cf2d4c337b6f	166	//--------------------------------------------------------------------------
timexton	0:cf2d4c337b6f	167	extern "C" {
timexton	0:cf2d4c337b6f	168	void clear_screen( void )
timexton	0:cf2d4c337b6f	169	{
timexton	0:cf2d4c337b6f	170	sprintf(sl_buff,"%c[2J", 27); sleepy_write( sl_buff); /* erase screen */
timexton	0:cf2d4c337b6f	171	}
timexton	0:cf2d4c337b6f	172	} //end of extern "C"
timexton	0:cf2d4c337b6f	173
timexton	0:cf2d4c337b6f	174	//-------------------------------------------------------------------------
timexton	0:cf2d4c337b6f	175	extern "C" {
timexton	0:cf2d4c337b6f	176	int tohex( char c )
timexton	0:cf2d4c337b6f	177	{
timexton	0:cf2d4c337b6f	178	if ( c > 0x39 ) c-=7;
timexton	0:cf2d4c337b6f	179	return( c&0xf );
timexton	0:cf2d4c337b6f	180	}
timexton	0:cf2d4c337b6f	181	} //end of extern "C"
timexton	0:cf2d4c337b6f	182
timexton	0:cf2d4c337b6f	183	//-------------------------------------------------------------------------
timexton	0:cf2d4c337b6f	184	extern "C" {
timexton	0:cf2d4c337b6f	185	int atohex( char *ptr )
timexton	0:cf2d4c337b6f	186	{
timexton	0:cf2d4c337b6f	187	int acc = 0;
timexton	0:cf2d4c337b6f	188	int nibble;
timexton	0:cf2d4c337b6f	189
timexton	0:cf2d4c337b6f	190	while( nibble = *ptr++ )
timexton	0:cf2d4c337b6f	191	{
timexton	0:cf2d4c337b6f	192	acc*=16;
timexton	0:cf2d4c337b6f	193	acc+=tohex(nibble);
timexton	0:cf2d4c337b6f	194	}
timexton	0:cf2d4c337b6f	195
timexton	0:cf2d4c337b6f	196	return( acc );
timexton	0:cf2d4c337b6f	197	}
timexton	0:cf2d4c337b6f	198
timexton	0:cf2d4c337b6f	199	} //end of extern "C"

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	09 Sep 2010
Imports:	30
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	3

serial.c@0:cf2d4c337b6f, 2010-09-09 (annotated)

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