blob: 9545c976c84e6e8b48f149a0d71e2cfdf8a867b9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/*
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file AT91SAM7/pal_lld.c
* @brief AT91SAM7 PIO low level driver code
* @addtogroup AT91SAM7_PAL
* @{
*/
#include <ch.h>
#include <pal.h>
#include "board.h"
/**
* @brief AT91SAM7 I/O ports configuration.
* @details PIO registers initialization.
*
* @param[in] config the AT91SAM7 ports configuration
*/
void _pal_lld_init(const AT91SAM7PIOConfig *config) {
unsigned int ports = (1 << AT91C_ID_PIOA);
#if defined(SAM7X128) || defined(SAM7X256) || defined(SAM7X512)
ports |= (1 << AT91C_ID_PIOB);
#endif
AT91C_BASE_PMC->PMC_PCER = ports;
/*
* PIOA setup.
*/
AT91C_BASE_PIOA->PIO_PPUER = config->P0Data.pusr; /* Pull-up as spec.*/
AT91C_BASE_PIOA->PIO_PPUDR = ~config->P0Data.pusr;
AT91C_BASE_PIOA->PIO_PER = 0xFFFFFFFF; /* PIO enabled.*/
AT91C_BASE_PIOA->PIO_ODSR = config->P0Data.odsr; /* Data as specified.*/
AT91C_BASE_PIOA->PIO_OER = config->P0Data.osr; /* Dir. as specified.*/
AT91C_BASE_PIOA->PIO_ODR = ~config->P0Data.osr;
AT91C_BASE_PIOA->PIO_IFDR = 0xFFFFFFFF; /* Filter disabled.*/
AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF; /* Int. disabled.*/
AT91C_BASE_PIOA->PIO_MDDR = 0xFFFFFFFF; /* Push Pull drive.*/
AT91C_BASE_PIOA->PIO_ASR = 0xFFFFFFFF; /* Peripheral A.*/
AT91C_BASE_PIOA->PIO_OWER = 0xFFFFFFFF; /* Write enabled.*/
/*
* PIOB setup.
*/
#if defined(SAM7X128) || defined(SAM7X256) || defined(SAM7X512)
AT91C_BASE_PIOB->PIO_PPUER = config->P1Data.pusr; /* Pull-up as spec.*/
AT91C_BASE_PIOB->PIO_PPUDR = ~config->P1Data.pusr;
AT91C_BASE_PIOB->PIO_PER = 0xFFFFFFFF; /* PIO enabled.*/
AT91C_BASE_PIOB->PIO_ODSR = config->P1Data.odsr; /* Data as specified.*/
AT91C_BASE_PIOB->PIO_OER = config->P1Data.osr; /* Dir. as specified.*/
AT91C_BASE_PIOB->PIO_ODR = ~config->P1Data.osr;
AT91C_BASE_PIOB->PIO_IFDR = 0xFFFFFFFF; /* Filter disabled.*/
AT91C_BASE_PIOB->PIO_IDR = 0xFFFFFFFF; /* Int. disabled.*/
AT91C_BASE_PIOB->PIO_MDDR = 0xFFFFFFFF; /* Push Pull drive.*/
AT91C_BASE_PIOB->PIO_ASR = 0xFFFFFFFF; /* Peripheral A.*/
AT91C_BASE_PIOB->PIO_OWER = 0xFFFFFFFF; /* Write enabled.*/
#endif
}
/**
* @brief Pads mode setup.
* @details This function programs a pads group belonging to the same port
* with the specified mode.
*
* @param[in] port the port identifier
* @param[in] mask the group mask
* @param[in] mode the mode
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note @p PAL_MODE_RESET is implemented as input with pull-up.
* @note @p PAL_MODE_UNCONNECTED is implemented as push pull output with high
* state.
* @note @p PAL_MODE_OUTPUT_OPENDRAIN also enables the pull-up resistor.
*/
void _pal_lld_setgroupmode(ioportid_t port,
ioportmask_t mask,
uint_fast8_t mode) {
switch (mode & PAL_MODE_MASK) {
case PAL_MODE_RESET:
case PAL_MODE_INPUT_PULLUP:
port->PIO_PPUER = mask;
port->PIO_ODR = mask;
break;
case PAL_MODE_INPUT:
case PAL_MODE_INPUT_ANALOG:
port->PIO_PPUDR = mask;
port->PIO_ODR = mask;
break;
case PAL_MODE_UNCONNECTED:
port->PIO_SODR = mask;
/* Falls in */
case PAL_MODE_OUTPUT_PUSHPULL:
port->PIO_PPUDR = mask;
port->PIO_OER = mask;
port->PIO_MDDR = mask;
break;
case PAL_MODE_OUTPUT_OPENDRAIN:
port->PIO_PPUER = mask;
port->PIO_OER = mask;
port->PIO_MDER = mask;
}
}
/** @} */
|
