| 1 |
786 |
skrzyp |
//==========================================================================
|
| 2 |
|
|
//
|
| 3 |
|
|
// var_misc.c
|
| 4 |
|
|
//
|
| 5 |
|
|
// HAL implementation miscellaneous functions
|
| 6 |
|
|
//
|
| 7 |
|
|
//==========================================================================
|
| 8 |
|
|
// ####ECOSGPLCOPYRIGHTBEGIN####
|
| 9 |
|
|
// -------------------------------------------
|
| 10 |
|
|
// This file is part of eCos, the Embedded Configurable Operating System.
|
| 11 |
|
|
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
|
| 12 |
|
|
//
|
| 13 |
|
|
// eCos is free software; you can redistribute it and/or modify it under
|
| 14 |
|
|
// the terms of the GNU General Public License as published by the Free
|
| 15 |
|
|
// Software Foundation; either version 2 or (at your option) any later
|
| 16 |
|
|
// version.
|
| 17 |
|
|
//
|
| 18 |
|
|
// eCos is distributed in the hope that it will be useful, but WITHOUT
|
| 19 |
|
|
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
| 20 |
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
| 21 |
|
|
// for more details.
|
| 22 |
|
|
//
|
| 23 |
|
|
// You should have received a copy of the GNU General Public License
|
| 24 |
|
|
// along with eCos; if not, write to the Free Software Foundation, Inc.,
|
| 25 |
|
|
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
| 26 |
|
|
//
|
| 27 |
|
|
// As a special exception, if other files instantiate templates or use
|
| 28 |
|
|
// macros or inline functions from this file, or you compile this file
|
| 29 |
|
|
// and link it with other works to produce a work based on this file,
|
| 30 |
|
|
// this file does not by itself cause the resulting work to be covered by
|
| 31 |
|
|
// the GNU General Public License. However the source code for this file
|
| 32 |
|
|
// must still be made available in accordance with section (3) of the GNU
|
| 33 |
|
|
// General Public License v2.
|
| 34 |
|
|
//
|
| 35 |
|
|
// This exception does not invalidate any other reasons why a work based
|
| 36 |
|
|
// on this file might be covered by the GNU General Public License.
|
| 37 |
|
|
// -------------------------------------------
|
| 38 |
|
|
// ####ECOSGPLCOPYRIGHTEND####
|
| 39 |
|
|
//==========================================================================
|
| 40 |
|
|
//#####DESCRIPTIONBEGIN####
|
| 41 |
|
|
//
|
| 42 |
|
|
// Author(s): larsi
|
| 43 |
|
|
// Contributors:
|
| 44 |
|
|
// Date: 2007-07-09
|
| 45 |
|
|
// Purpose: HAL miscellaneous functions
|
| 46 |
|
|
// Description: This file contains miscellaneous functions provided by the
|
| 47 |
|
|
// HAL.
|
| 48 |
|
|
//
|
| 49 |
|
|
//####DESCRIPTIONEND####
|
| 50 |
|
|
//
|
| 51 |
|
|
//========================================================================*/
|
| 52 |
|
|
|
| 53 |
|
|
#include <pkgconf/hal.h>
|
| 54 |
|
|
|
| 55 |
|
|
#include <cyg/infra/cyg_type.h> // Base types
|
| 56 |
|
|
#include <cyg/infra/cyg_trac.h> // tracing macros
|
| 57 |
|
|
#include <cyg/infra/cyg_ass.h> // assertion macros
|
| 58 |
|
|
|
| 59 |
|
|
#include <cyg/hal/hal_intr.h>
|
| 60 |
|
|
|
| 61 |
|
|
#include <cyg/hal/hal_misc.h>
|
| 62 |
|
|
/*------------------------------------------------------------------------*/
|
| 63 |
|
|
// Array which stores the configured priority levels for the configured
|
| 64 |
|
|
// interrupts.
|
| 65 |
|
|
|
| 66 |
|
|
/* this may be useful later when interrupt masking of internal interrupt
|
| 67 |
|
|
sources is implemented
|
| 68 |
|
|
|
| 69 |
|
|
volatile CYG_BYTE hal_interrupt_level[CYGNUM_HAL_ISR_COUNT];
|
| 70 |
|
|
*/
|
| 71 |
|
|
/*------------------------------------------------------------------------*/
|
| 72 |
|
|
|
| 73 |
|
|
void hal_variant_init(void)
|
| 74 |
|
|
{
|
| 75 |
|
|
}
|
| 76 |
|
|
|
| 77 |
|
|
//--------------------------------------------------------------------------
|
| 78 |
|
|
// Microsecond delay
|
| 79 |
|
|
// This uses reload timer 2, because timer 0 and 1 can cause DMA transfers
|
| 80 |
|
|
// and may be used by the application.
|
| 81 |
|
|
// Timer is initialized with 32 prescaler. If we need more precise delay
|
| 82 |
|
|
// this has to change.
|
| 83 |
|
|
|
| 84 |
|
|
void hal_delay_us(cyg_int32 n){
|
| 85 |
|
|
#define TIMER_TIME CYGHWR_HAL_FR30_MB91301_SYSTEM_CLOCK_MHZ * 1000000 / CYGHWR_HAL_FR30_MB91301_CLKP_DIVIDER / 32
|
| 86 |
|
|
|
| 87 |
|
|
unsigned int calc(unsigned long long n){
|
| 88 |
|
|
return n * TIMER_TIME / 1000000;
|
| 89 |
|
|
}
|
| 90 |
|
|
|
| 91 |
|
|
cyg_uint16 timer_status;
|
| 92 |
|
|
|
| 93 |
|
|
n = 21;//calc(n);
|
| 94 |
|
|
// stop eventually running counter and initialize
|
| 95 |
|
|
HAL_WRITE_UINT16(CYG_HAL_FR30_DLY_TMCSR, 0x812);
|
| 96 |
|
|
|
| 97 |
|
|
HAL_WRITE_UINT16(CYG_HAL_FR30_DLY_TMRLR, 0xFFFF);
|
| 98 |
|
|
while(n > 0xffff){
|
| 99 |
|
|
// start counting
|
| 100 |
|
|
HAL_WRITE_UINT16(CYG_HAL_FR30_DLY_TMCSR, 0x813);
|
| 101 |
|
|
n = n - 0xffff;
|
| 102 |
|
|
// look for underflow
|
| 103 |
|
|
do {
|
| 104 |
|
|
HAL_READ_UINT16(CYG_HAL_FR30_DLY_TMCSR, timer_status);
|
| 105 |
|
|
} while (!(timer_status & BIT2));
|
| 106 |
|
|
// clear underflow bit
|
| 107 |
|
|
HAL_WRITE_UINT16(CYG_HAL_FR30_DLY_TMCSR, 0x813);
|
| 108 |
|
|
}
|
| 109 |
|
|
// clear count enable bit
|
| 110 |
|
|
HAL_WRITE_UINT16(CYG_HAL_FR30_DLY_TMCSR, 0x810);
|
| 111 |
|
|
// set new remaining count value
|
| 112 |
|
|
HAL_WRITE_UINT16(CYG_HAL_FR30_DLY_TMRLR, n);
|
| 113 |
|
|
// start counting
|
| 114 |
|
|
HAL_WRITE_UINT16(CYG_HAL_FR30_DLY_TMCSR, 0x813);
|
| 115 |
|
|
// look for underflow
|
| 116 |
|
|
do {
|
| 117 |
|
|
HAL_READ_UINT16(CYG_HAL_FR30_DLY_TMCSR, timer_status);
|
| 118 |
|
|
} while (!(timer_status & BIT2));
|
| 119 |
|
|
// clear underflow and count enable bits
|
| 120 |
|
|
HAL_WRITE_UINT16(CYG_HAL_FR30_DLY_TMCSR, 0x810);
|
| 121 |
|
|
}
|
| 122 |
|
|
|
| 123 |
|
|
/*------------------------------------------------------------------------*/
|
| 124 |
|
|
/* End of var_misc.c */
|
