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/* 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 "pinmap.h"
#include "mbed_error.h"
#include "gpio_addrdefine.h"
PinName gpio_multi_guard = (PinName)NC; /* If set pin name here, setting of the "pin" is just one time */
void pin_function(PinName pin, int function) {
if (pin == (PinName)NC) return;
int n = pin >> 4;
int bitmask = 1<<(pin & 0xf);
if (gpio_multi_guard != pin) {
if (function == 0) {
// means GPIO mode
*PMC(n) &= ~bitmask;
} else {
// alt-function mode
--function;
if (function & (1 << 2)) { *PFCAE(n) |= bitmask;}else { *PFCAE(n) &= ~bitmask;}
if (function & (1 << 1)) { *PFCE(n) |= bitmask;}else { *PFCE(n) &= ~bitmask;}
if (function & (1 << 0)) { *PFC(n) |= bitmask;}else { *PFC(n) &= ~bitmask;}
*PIPC(n) |= bitmask;
if (P1_0 <= pin && pin <= P1_7 && function == 0) {
*PBDC(n) |= bitmask;
}
*PMC(n) |= bitmask;
}
} else {
gpio_multi_guard = (PinName)NC;
}
}
void pin_mode(PinName pin, PinMode mode) {
// if (pin == (PinName)NC) { return; }
}
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