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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 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