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Diff: targets/TARGET_Silicon_Labs/TARGET_EFM32/pinmap.c
- Revision:
- 149:156823d33999
- Parent:
- 144:ef7eb2e8f9f7
- Child:
- 150:02e0a0aed4ec
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/TARGET_Silicon_Labs/TARGET_EFM32/pinmap.c Fri Oct 28 11:17:30 2016 +0100 @@ -0,0 +1,56 @@ +/***************************************************************************//** + * @file pinmap.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 "pinmap.h" +#include "em_gpio.h" +#include "em_cmu.h" +#include "mbed_assert.h" + +static int gpio_clock_inited = 0; + +void pin_function(PinName pin, int function) +{ + //Intentionally left empty. We have repurposed the function field. +} + +void pin_mode(PinName pin, PinMode mode) +{ + MBED_ASSERT((0xFFFFFF00 |pin) != NC); + + /* Enable GPIO clock if not already done */ + if (!gpio_clock_inited) { + CMU_ClockEnable(cmuClock_GPIO, true); + gpio_clock_inited = 1; + } + + /* Pin and port index encoded in one uint32. + * First four bits represent the pin number + * The remaining bits represent the port number */ + uint32_t pin_number = (uint32_t) pin; + int pin_index = (pin_number & 0xF); + int port_index = pin_number >> 4; + + GPIO_PinModeSet(port_index, pin_index, mode & 0xF, GPIO_PinOutGet(port_index, pin_index & 0xF)); +} + +// TODO_LP get pin_mode to be able to store previous settings