mirror of https://github.com/ARMmbed/mbed-os.git
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/***************************************************************************//**
|
|
* @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(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
|