]>
git.gir.st - tmk_keyboard.git/blob - tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC43XX/port_api.c
1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 * Ported to NXP LPC43XX by Micromint USA <support@micromint.com>
18 #include "mbed_assert.h"
23 // Lookup table to determine SCU offset for GPIO [port][pin]
24 // Supports eight 16-bit ports to limit table size
25 #define _SO(MBED_PIN) (MBED_PIN >> 18)
27 static const uint8_t _scu_off
[][16] =
29 { _SO(GPIO0_0
), _SO(GPIO0_1
), _SO(GPIO0_2
), _SO(GPIO0_3
),
30 _SO(GPIO0_4
), _SO(GPIO0_5
), _SO(GPIO0_6
), _SO(GPIO0_7
),
31 _SO(GPIO0_8
), _SO(GPIO0_9
), _SO(GPIO0_10
), _SO(GPIO0_11
),
32 _SO(GPIO0_12
), _SO(GPIO0_13
), _SO(GPIO0_14
), _SO(GPIO0_15
)
34 { _SO(GPIO1_0
), _SO(GPIO1_1
), _SO(GPIO1_2
), _SO(GPIO1_3
),
35 _SO(GPIO1_4
), _SO(GPIO1_5
), _SO(GPIO1_6
), _SO(GPIO1_7
),
36 _SO(GPIO1_8
), _SO(GPIO1_9
), _SO(GPIO1_10
), _SO(GPIO1_11
),
37 _SO(GPIO1_12
), _SO(GPIO1_13
), _SO(GPIO1_14
), _SO(GPIO1_15
)
39 { _SO(GPIO2_0
), _SO(GPIO2_1
), _SO(GPIO2_2
), _SO(GPIO2_3
),
40 _SO(GPIO2_4
), _SO(GPIO2_5
), _SO(GPIO2_6
), _SO(GPIO2_7
),
41 _SO(GPIO2_8
), _SO(GPIO2_9
), _SO(GPIO2_10
), _SO(GPIO2_11
),
42 _SO(GPIO2_12
), _SO(GPIO2_13
), _SO(GPIO2_14
), _SO(GPIO2_15
)
44 { _SO(GPIO3_0
), _SO(GPIO3_1
), _SO(GPIO3_2
), _SO(GPIO3_3
),
45 _SO(GPIO3_4
), _SO(GPIO3_5
), _SO(GPIO3_6
), _SO(GPIO3_7
),
46 _SO(GPIO3_8
), _SO(GPIO3_9
), _SO(GPIO3_10
), _SO(GPIO3_11
),
47 _SO(GPIO3_12
), _SO(GPIO3_13
), _SO(GPIO3_14
), _SO(GPIO3_15
)
51 // Use alternate encoding for ports 4 to 7 so lookup stays within uint8
52 #define _S2(MBED_PIN) (((MBED_PIN >> 19) & 0xf0) | ((MBED_PIN >> 18) & 0x0f))
54 static const uint8_t _scu_off2
[][16] =
56 { _S2(GPIO4_0
), _S2(GPIO4_1
), _S2(GPIO4_2
), _S2(GPIO4_3
),
57 _S2(GPIO4_4
), _S2(GPIO4_5
), _S2(GPIO4_6
), _S2(GPIO4_7
),
58 _S2(GPIO4_8
), _S2(GPIO4_9
), _S2(GPIO4_10
), _S2(GPIO4_11
),
59 _S2(GPIO4_12
), _S2(GPIO4_13
), _S2(GPIO4_14
), _S2(GPIO4_15
)
61 { _S2(GPIO5_0
), _S2(GPIO5_1
), _S2(GPIO5_2
), _S2(GPIO5_3
),
62 _S2(GPIO5_4
), _S2(GPIO5_5
), _S2(GPIO5_6
), _S2(GPIO5_7
),
63 _S2(GPIO5_8
), _S2(GPIO5_9
), _S2(GPIO5_10
), _S2(GPIO5_11
),
64 _S2(GPIO5_12
), _S2(GPIO5_13
), _S2(GPIO5_14
), _S2(GPIO5_15
)
66 { _S2(GPIO6_0
), _S2(GPIO6_1
), _S2(GPIO6_2
), _S2(GPIO6_3
),
67 _S2(GPIO6_4
), _S2(GPIO6_5
), _S2(GPIO6_6
), _S2(GPIO6_7
),
68 _S2(GPIO6_8
), _S2(GPIO6_9
), _S2(GPIO6_10
), _S2(GPIO6_11
),
69 _S2(GPIO6_12
), _S2(GPIO6_13
), _S2(GPIO6_14
), _S2(GPIO6_15
)
71 { _S2(GPIO7_0
), _S2(GPIO7_1
), _S2(GPIO7_2
), _S2(GPIO7_3
),
72 _S2(GPIO7_4
), _S2(GPIO7_5
), _S2(GPIO7_6
), _S2(GPIO7_7
),
73 _S2(GPIO7_8
), _S2(GPIO7_9
), _S2(GPIO7_10
), _S2(GPIO7_11
),
74 _S2(GPIO7_12
), _S2(GPIO7_13
), _S2(GPIO7_14
), _S2(GPIO7_15
)
78 PinName
port_pin(PortName port
, int pin_n
) {
79 MBED_ASSERT((port
<= Port7
) && (pin_n
< 32));
82 // Lookup table only maps pins 0 to 15
89 offset
= _scu_off
[port
][pin_n
];
91 offset
= _scu_off2
[port
- Port4
][pin_n
];
92 offset
= ((offset
& 0xf0) << 1) | (offset
& 0x0f);
96 return (PinName
)((offset
<< 18) | GPIO_OFF(port
, pin_n
));
99 void port_init(port_t
*obj
, PortName port
, int mask
, PinDirection dir
) {
103 LPC_GPIO_T
*port_reg
= (LPC_GPIO_T
*)(LPC_GPIO_PORT_BASE
);
105 // Do not use masking, because it prevents the use of the unmasked pins
106 // port_reg->MASK[port] = ~mask;
108 obj
->reg_out
= &port_reg
->PIN
[port
];
109 obj
->reg_in
= &port_reg
->PIN
[port
];
110 obj
->reg_dir
= &port_reg
->DIR[port
];
113 // The function is set per pin: reuse gpio logic
114 for (i
=0; i
<32; i
++) {
115 if (obj
->mask
& (1<<i
)) {
116 gpio_set(port_pin(obj
->port
, i
));
123 void port_mode(port_t
*obj
, PinMode mode
) {
125 // The mode is set per pin: reuse pinmap logic
126 for (i
=0; i
<32; i
++) {
127 if (obj
->mask
& (1<<i
)) {
128 pin_mode(port_pin(obj
->port
, i
), mode
);
133 void port_dir(port_t
*obj
, PinDirection dir
) {
135 case PIN_INPUT
: *obj
->reg_dir
&= ~obj
->mask
; break;
136 case PIN_OUTPUT
: *obj
->reg_dir
|= obj
->mask
; break;
140 void port_write(port_t
*obj
, int value
) {
141 *obj
->reg_out
= (*obj
->reg_in
& ~obj
->mask
) | (value
& obj
->mask
);
144 int port_read(port_t
*obj
) {
145 return (*obj
->reg_in
& obj
->mask
);