0ef1717155
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41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 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 "mbed_assert.h"
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#include "pinmap.h"
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void pin_function(PinName pin, int function) {
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MBED_ASSERT(pin != (PinName)NC);
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uint32_t port_n = (uint32_t)pin >> PORT_SHIFT;
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uint32_t pin_n = (uint32_t)(pin & 0x7C) >> 2;
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SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port_n);
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__IO uint32_t* pin_pcr = &(((PORT_Type *)(PORTA_BASE + 0x1000 * port_n)))->PCR[pin_n];
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// pin mux bits: [10:8] -> 11100000000 = (0x700)
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*pin_pcr = (*pin_pcr & ~0x700) | (function << 8);
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}
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void pin_mode(PinName pin, PinMode mode) {
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MBED_ASSERT(pin != (PinName)NC);
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__IO uint32_t* pin_pcr = (__IO uint32_t*)(PORTA_BASE + pin);
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// pin pullup bits: [1:0] -> 11 = (0x3)
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*pin_pcr = (*pin_pcr & ~0x3) | mode;
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}
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