Mouse code for the MacroRat
Diff: mbed-dev/targets/TARGET_Silicon_Labs/TARGET_EFM32/gpio_api.c
- Revision:
- 18:6a4db94011d3
diff -r f713758f6238 -r 6a4db94011d3 mbed-dev/targets/TARGET_Silicon_Labs/TARGET_EFM32/gpio_api.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-dev/targets/TARGET_Silicon_Labs/TARGET_EFM32/gpio_api.c Sun May 14 23:18:57 2017 +0000 @@ -0,0 +1,142 @@ +/***************************************************************************//** + * @file gpio_api.c + ******************************************************************************* + * @section License + * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b> + ******************************************************************************* + * + * SPDX-License-Identifier: Apache-2.0 + * + * 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 ((uint32_t)obj->pin | 0xFFFFFF00 ) != (uint32_t)((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) +{ + uint32_t pin = 1 << (obj->pin & 0xF); + uint32_t port = (obj->pin >> 4) & 0xF; + + 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 +#ifdef _GPIO_P_DOUTSET_MASK + GPIO->P[port].DOUTSET = pin; +#else + GPIO->P[port].DOUT |= pin; +#endif + } else { + //Clear DOUT +#ifdef _GPIO_P_DOUTCLR_MASK + GPIO->P[port].DOUTCLR = pin; +#else + GPIO->P[port].DOUT &= ~pin; +#endif + } + } 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; + } +}