mirror of https://github.com/ARMmbed/mbed-os.git
75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may 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,
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* WITHOUT 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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#include "PeripheralPins.h"
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#include "mbed_error.h"
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#include "gpio_addrdefine.h"
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PinName gpio_multi_guard = (PinName)NC; /* If set pin name here, setting of the "pin" is just one time */
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void pin_function(PinName pin, int function) {
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if (pin == (PinName)NC) return;
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int n = pin >> 4;
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int bitmask = 1<<(pin & 0xf);
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const PinFunc * Pipc_0_func = PIPC_0_tbl;
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int pipc_data = 1;
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if (gpio_multi_guard != pin) {
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if (function == 0) {
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// means GPIO mode
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*PMC(n) &= ~bitmask;
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} else {
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// alt-function mode
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--function;
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if (function & (1 << 2)) { *PFCAE(n) |= bitmask;}else { *PFCAE(n) &= ~bitmask;}
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if (function & (1 << 1)) { *PFCE(n) |= bitmask;}else { *PFCE(n) &= ~bitmask;}
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if (function & (1 << 0)) { *PFC(n) |= bitmask;}else { *PFC(n) &= ~bitmask;}
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while (Pipc_0_func->pin != NC) {
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if ((Pipc_0_func->pin == pin) && ((Pipc_0_func->function - 1) == function)) {
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pipc_data = 0;
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if (Pipc_0_func->pm == 0) {
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*PMSR(n) = (bitmask << 16) | 0;
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} else if (Pipc_0_func->pm == 1) {
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*PMSR(n) = (bitmask << 16) | bitmask;
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} else {
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// Do Nothing
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}
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break;
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}
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Pipc_0_func++;
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}
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if (pipc_data == 1) {
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*PIPC(n) |= bitmask;
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} else {
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*PIPC(n) &= ~bitmask;
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}
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if (P1_0 <= pin && pin <= P1_7 && function == 0) {
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*PBDC(n) |= bitmask;
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}
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*PMC(n) |= bitmask;
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}
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} else {
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gpio_multi_guard = (PinName)NC;
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}
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}
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void pin_mode(PinName pin, PinMode mode) {
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// if (pin == (PinName)NC) { return; }
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}
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