OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [HCS12_GCC_banked/] [startup.c] - Blame information for rev 591

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 588 jeremybenn
/*
2
    FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
3
 
4
    ***************************************************************************
5
    *                                                                         *
6
    * If you are:                                                             *
7
    *                                                                         *
8
    *    + New to FreeRTOS,                                                   *
9
    *    + Wanting to learn FreeRTOS or multitasking in general quickly       *
10
    *    + Looking for basic training,                                        *
11
    *    + Wanting to improve your FreeRTOS skills and productivity           *
12
    *                                                                         *
13
    * then take a look at the FreeRTOS books - available as PDF or paperback  *
14
    *                                                                         *
15
    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
16
    *                  http://www.FreeRTOS.org/Documentation                  *
17
    *                                                                         *
18
    * A pdf reference manual is also available.  Both are usually delivered   *
19
    * to your inbox within 20 minutes to two hours when purchased between 8am *
20
    * and 8pm GMT (although please allow up to 24 hours in case of            *
21
    * exceptional circumstances).  Thank you for your support!                *
22
    *                                                                         *
23
    ***************************************************************************
24
 
25
    This file is part of the FreeRTOS distribution.
26
 
27
    FreeRTOS is free software; you can redistribute it and/or modify it under
28
    the terms of the GNU General Public License (version 2) as published by the
29
    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
30
    ***NOTE*** The exception to the GPL is included to allow you to distribute
31
    a combined work that includes FreeRTOS without being obliged to provide the
32
    source code for proprietary components outside of the FreeRTOS kernel.
33
    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
34
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
35
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
36
    more details. You should have received a copy of the GNU General Public
37
    License and the FreeRTOS license exception along with FreeRTOS; if not it
38
    can be viewed here: http://www.freertos.org/a00114.html and also obtained
39
    by writing to Richard Barry, contact details for whom are available on the
40
    FreeRTOS WEB site.
41
 
42
    1 tab == 4 spaces!
43
 
44
    http://www.FreeRTOS.org - Documentation, latest information, license and
45
    contact details.
46
 
47
    http://www.SafeRTOS.com - A version that is certified for use in safety
48
    critical systems.
49
 
50
    http://www.OpenRTOS.com - Commercial support, development, porting,
51
    licensing and training services.
52
*/
53
 
54
 
55
/*
56
 * startup.c
57
 * Author Jefferson L Smith, Robotronics Inc.
58
 *
59
 * __premain() is the startup code to init hardware and ram to execute the
60
 *             C application.
61
 *
62
 */
63
 
64
#include <sys/ports.h>
65
#include "cpu.h"
66
 
67
void ATTR_NEAR __premain (void);
68
 
69
void
70
__premain (void)
71
{
72
        // in case special mode enabled, avoid conflict on PORTE
73
        PEAR |= NECLK;
74
        // bgnd mode stops COP and RTI clocks
75
        COPCTL = RSBCK;
76
        // stops TCNT counter when debugging stops
77
        TSCR1 |= (1<<5);                        // TFRZ
78
 
79
        // PLL
80
        CLKSEL = 0;                              // disable PLL to configure
81
        // xtal 16MHz, bus 24MHz
82
        SYNR  = 3 - 1;
83
        REFDV = 2 - 1;
84
        while (!(CRGFLG & 0x08))    // wait for PLL LOCK
85
        cop_optional_reset();
86
        CLKSEL |= 0x80;             // use PLL
87
 
88
        // init switch inputs
89
        PERH = 0xff;                            // pullups
90
 
91
        // outputs
92
#if PORT_LED==M6811_PORTB               //PORTB
93
        DDRB = 0xff;    // init LED
94
#elif PORT_LED==M6811_PORTA             //PORTA
95
        DDRA = 0xff;
96
#elif PORT_LED==M6811_PTT       //PTT
97
        DDRT = 0xff;
98
#elif PORT_LED==M6811_PTM       //PTM
99
        DDRM = 0xff;
100
#elif PORT_LED==M6811_PTP       //PTP
101
        DDRP = 0xff;
102
#elif PORT_LED==M6811_PTH       //PTH
103
        DDRH = 0xff;
104
#endif
105
 
106
}
107
 

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.