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57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/***************************************************************************//**
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* @file pinmap.c
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*******************************************************************************
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* @section License
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* <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
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*******************************************************************************
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#include "pinmap.h"
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#include "em_gpio.h"
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#include "em_cmu.h"
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#include "mbed_assert.h"
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static int gpio_clock_inited = 0;
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void pin_function(PinName pin, int function)
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{
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//Intentionally left empty. We have repurposed the function field.
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}
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void pin_mode(PinName pin, PinMode mode)
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{
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MBED_ASSERT(pin != NC);
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/* Enable GPIO clock if not already done */
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if (!gpio_clock_inited) {
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CMU_ClockEnable(cmuClock_GPIO, true);
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gpio_clock_inited = 1;
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}
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/* Pin and port index encoded in one uint32.
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* First four bits represent the pin number
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* The remaining bits represent the port number */
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uint32_t pin_number = (uint32_t) pin;
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int pin_index = (pin_number & 0xF);
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int port_index = pin_number >> 4;
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GPIO_PinModeSet(port_index, pin_index, mode & 0xF, GPIO_PinOutGet(port_index, pin_index & 0xF));
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}
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// TODO_LP get pin_mode to be able to store previous settings
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