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Superseded
This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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.
targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/gpio_api.c
- Committer:
- mbed_official
- Date:
- 2015-07-20
- Revision:
- 593:78ee8643776a
- Parent:
- 556:a217bc785985
- Child:
- 627:4fa1328d9c60
File content as of revision 593:78ee8643776a:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "gpio_api.h" #include "pinmap.h" #include "em_cmu.h" #include "mbed_assert.h" #include "sleepmodes.h" void gpio_write(gpio_t *obj, int value) { if (value) { GPIO_PinOutSet((GPIO_Port_TypeDef)(obj->pin >> 4 & 0xF), obj->pin & 0xF); // Pin number encoded in first four bits of obj->pin } else { GPIO_PinOutClear((GPIO_Port_TypeDef)(obj->pin >> 4 & 0xF), obj->pin & 0xF); } } int gpio_read(gpio_t *obj) { if (obj->dir == PIN_INPUT) { return GPIO_PinInGet((GPIO_Port_TypeDef)(obj->pin >> 4 & 0xF), obj->pin & 0xF); // Pin number encoded in first four bits of obj->pin } else { return GPIO_PinOutGet((GPIO_Port_TypeDef)(obj->pin >> 4 & 0xF), obj->pin & 0xF); } } int gpio_is_connected(const gpio_t *obj) { return (obj->pin | 0xFFFFFF00 )!= (PinName)NC; } /* * @return the GPIO port mask for this pin * Pin and port index encoded in one uint32. * First four bits represent the pin number * The remaining bits represent the pin mode */ uint32_t gpio_set(PinName pin) { return 1 << ((uint32_t) pin & 0xF); } void gpio_init(gpio_t *obj, PinName pin) { MBED_ASSERT(pin != NC); CMU_ClockEnable(cmuClock_HFPER, true); CMU_ClockEnable(cmuClock_GPIO, true); obj->pin = pin; } void gpio_mode(gpio_t *obj, PinMode mode) { if(obj->dir == PIN_INPUT) { switch(mode) { case PullDefault: mode = Input; break; case PullUp: mode = InputPullUp; break; case PullDown: mode = InputPullDown; break; default: break; } //Handle DOUT setting if((mode & 0x10) != 0) { //Set DOUT GPIO->P[(obj->pin >> 4) & 0xF].DOUTSET = 1 << (obj->pin & 0xF); } else { //Clear DOUT GPIO->P[(obj->pin >> 4) & 0xF].DOUTCLR = 1 << (obj->pin & 0xF); } } else { switch(mode) { case PullDefault: mode = PushPull; break; case PullUp: mode = WiredAndPullUp; break; case PullDown: mode = WiredOrPullDown; break; default: break; } } obj->mode = mode; // Update object pin_mode(obj->pin, mode); // Update register } // Used by DigitalInOut to set correct mode when direction is set void gpio_dir(gpio_t *obj, PinDirection direction) { obj->dir = direction; switch (direction) { case PIN_INPUT: gpio_mode(obj, PullDefault); break; case PIN_OUTPUT: gpio_mode(obj, PullNone); break; } }