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54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2020 ARM Limited
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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");
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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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#include "mbed_drv_cfg.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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{
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uint32_t reg_group = PINGROUP(pin);
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uint32_t bitmask = (1 << PINNO(pin));
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if (reg_group > GPIO_GROUP_MAX) {
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return;
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}
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if (gpio_multi_guard == pin) {
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gpio_multi_guard = (PinName)NC;
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return;
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}
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if (function == 0) {
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*PMR(reg_group) &= ~bitmask;
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} else {
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GPIO.PWPR.BIT.B0WI = 0;
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GPIO.PWPR.BIT.PFSWE = 1;
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*PFS(reg_group, PINNO(pin)) = function;
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GPIO.PWPR.BIT.PFSWE = 0;
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GPIO.PWPR.BIT.B0WI = 1;
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*PMR(reg_group) |= bitmask;
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}
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}
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void pin_mode(PinName pin, PinMode mode)
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{
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// if (pin == (PinName)NC) { return; }
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}
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