]> git.gir.st - tmk_keyboard.git/blob - tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11U6X/gpio_api.c
Merge commit '1fe4406f374291ab2e86e95a97341fd9c475fcb8'
[tmk_keyboard.git] / tmk_core / tool / mbed / mbed-sdk / libraries / mbed / targets / hal / TARGET_NXP / TARGET_LPC11U6X / gpio_api.c
1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2014 ARM Limited
3 *
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
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
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.
15 */
16 #include "mbed_assert.h"
17 #include "gpio_api.h"
18 #include "pinmap.h"
19
20 static int gpio_enabled = 0;
21
22 static void gpio_enable(void) {
23 gpio_enabled = 1;
24
25 /* Enable AHB clock to the GPIO and IOCON domain. */
26 LPC_SYSCON->SYSAHBCLKCTRL |= ((1 << 16) | (1 << 6));
27 }
28
29 uint32_t gpio_set(PinName pin) {
30 MBED_ASSERT(pin != (PinName)NC);
31 if (!gpio_enabled)
32 gpio_enable();
33
34 int func = ((pin == P0_0) || // reset
35 (pin == P0_10) || // SWCLK
36 (pin == P0_12) || // TMS
37 (pin == P0_13) || // TDO
38 (pin == P0_14) || // TRST
39 (pin == P0_15)) ? (1) : (0); // SWDIO
40
41 pin_function(pin, func);
42
43 return (1UL << ((int)pin >> PIN_SHIFT & 0x1F));
44 }
45
46 void gpio_init(gpio_t *obj, PinName pin) {
47 obj->pin = pin;
48 if (pin == (PinName)NC)
49 return;
50
51 obj->mask = gpio_set(pin);
52
53 unsigned int port = (unsigned int)(pin >> PORT_SHIFT);
54
55 obj->reg_set = &LPC_GPIO_PORT->SET[port];
56 obj->reg_clr = &LPC_GPIO_PORT->CLR[port];
57 obj->reg_in = &LPC_GPIO_PORT->PIN[port];
58 obj->reg_dir = &LPC_GPIO_PORT->DIR[port];
59 }
60
61 void gpio_mode(gpio_t *obj, PinMode mode) {
62 pin_mode(obj->pin, mode);
63 }
64
65 void gpio_dir(gpio_t *obj, PinDirection direction) {
66 MBED_ASSERT(obj->pin != (PinName)NC);
67 switch (direction) {
68 case PIN_INPUT :
69 *obj->reg_dir &= ~obj->mask;
70 break;
71 case PIN_OUTPUT:
72 *obj->reg_dir |= obj->mask;
73 break;
74 }
75 }
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