marcus chiou / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/gpio_api.c@525:c320967f86b9, 2015-04-28 (annotated)

Committer:
mbed_official
Date:
Tue Apr 28 11:45:12 2015 +0100
Revision:
525:c320967f86b9
Child:
526:7c4bdfe6a168
Synchronized with git revision 299385b8331142b9dc524da7a986536f60b14553



Full URL: https://github.com/mbedmicro/mbed/commit/299385b8331142b9dc524da7a986536f60b14553/



Add in Silicon Labs targets with asynchronous API support

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 525:c320967f86b9 1 /* mbed Microcontroller Library
mbed_official 525:c320967f86b9 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 525:c320967f86b9 3 *
mbed_official 525:c320967f86b9 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 525:c320967f86b9 5 * you may not use this file except in compliance with the License.
mbed_official 525:c320967f86b9 6 * You may obtain a copy of the License at
mbed_official 525:c320967f86b9 7 *
mbed_official 525:c320967f86b9 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 525:c320967f86b9 9 *
mbed_official 525:c320967f86b9 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 525:c320967f86b9 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 525:c320967f86b9 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 525:c320967f86b9 13 * See the License for the specific language governing permissions and
mbed_official 525:c320967f86b9 14 * limitations under the License.
mbed_official 525:c320967f86b9 15 */
mbed_official 525:c320967f86b9 16 #include "gpio_api.h"
mbed_official 525:c320967f86b9 17 #include "pinmap.h"
mbed_official 525:c320967f86b9 18 #include "em_cmu.h"
mbed_official 525:c320967f86b9 19 #include "mbed_assert.h"
mbed_official 525:c320967f86b9 20
mbed_official 525:c320967f86b9 21 uint8_t gpio_get_index(gpio_t *obj)
mbed_official 525:c320967f86b9 22 {
mbed_official 525:c320967f86b9 23 return 0;
mbed_official 525:c320967f86b9 24 }
mbed_official 525:c320967f86b9 25
mbed_official 525:c320967f86b9 26 /*
mbed_official 525:c320967f86b9 27 * @return the GPIO port mask for this pin
mbed_official 525:c320967f86b9 28 * Pin and port index encoded in one uint32.
mbed_official 525:c320967f86b9 29 * First four bits represent the pin number
mbed_official 525:c320967f86b9 30 * The remaining bits represent the pin mode
mbed_official 525:c320967f86b9 31 */
mbed_official 525:c320967f86b9 32 uint32_t gpio_set(PinName pin)
mbed_official 525:c320967f86b9 33 {
mbed_official 525:c320967f86b9 34 return 1 << ((uint32_t) pin & 0xF);
mbed_official 525:c320967f86b9 35 }
mbed_official 525:c320967f86b9 36
mbed_official 525:c320967f86b9 37 void gpio_init(gpio_t *obj, PinName pin)
mbed_official 525:c320967f86b9 38 {
mbed_official 525:c320967f86b9 39 MBED_ASSERT(pin != NC);
mbed_official 525:c320967f86b9 40
mbed_official 525:c320967f86b9 41 CMU_ClockEnable(cmuClock_HFPER, true);
mbed_official 525:c320967f86b9 42 CMU_ClockEnable(cmuClock_GPIO, true);
mbed_official 525:c320967f86b9 43 obj->pin = pin;
mbed_official 525:c320967f86b9 44 obj->mask = gpio_set(pin);
mbed_official 525:c320967f86b9 45 obj->port = pin >> 4;
mbed_official 525:c320967f86b9 46 }
mbed_official 525:c320967f86b9 47
mbed_official 525:c320967f86b9 48 void gpio_pin_enable(gpio_t *obj, uint8_t enable)
mbed_official 525:c320967f86b9 49 {
mbed_official 525:c320967f86b9 50 if (enable) {
mbed_official 525:c320967f86b9 51 pin_mode(obj->pin, obj->mode);
mbed_official 525:c320967f86b9 52 } else {
mbed_official 525:c320967f86b9 53 pin_mode(obj->pin, Disabled); // TODO_LP return mode to default value
mbed_official 525:c320967f86b9 54 }
mbed_official 525:c320967f86b9 55 }
mbed_official 525:c320967f86b9 56
mbed_official 525:c320967f86b9 57 void gpio_mode(gpio_t *obj, PinMode mode)
mbed_official 525:c320967f86b9 58 {
mbed_official 525:c320967f86b9 59 obj->mode = mode; // Update object
mbed_official 525:c320967f86b9 60 pin_mode(obj->pin, mode); // Update register
mbed_official 525:c320967f86b9 61 }
mbed_official 525:c320967f86b9 62
mbed_official 525:c320967f86b9 63 // Used by DigitalInOut to set correct mode when direction is set
mbed_official 525:c320967f86b9 64 void gpio_dir(gpio_t *obj, PinDirection direction)
mbed_official 525:c320967f86b9 65 {
mbed_official 525:c320967f86b9 66 obj->dir = direction;
mbed_official 525:c320967f86b9 67 switch (direction) {
mbed_official 525:c320967f86b9 68 case PIN_INPUT:
mbed_official 525:c320967f86b9 69 gpio_mode(obj, PullDefault);
mbed_official 525:c320967f86b9 70 break;
mbed_official 525:c320967f86b9 71 case PIN_OUTPUT:
mbed_official 525:c320967f86b9 72 gpio_mode(obj, PullNone);
mbed_official 525:c320967f86b9 73 break;
mbed_official 525:c320967f86b9 74 }
mbed_official 525:c320967f86b9 75 }
mbed_official 525:c320967f86b9 76