mirror of https://github.com/ARMmbed/mbed-os.git
42 lines
1.2 KiB
C
42 lines
1.2 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 "mbed_assert.h"
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#include "pinmap.h"
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#include "mbed_error.h"
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void pin_function(PinName pin, int function) {
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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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if ((pin == P0_22) || (pin == P0_23)) {
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// The true open-drain pins PIO0_22 and PIO0_23 can be configured for different I2C-bus speeds.
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return;
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}
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__IO uint32_t *reg = (__IO uint32_t*)(LPC_IOCON_BASE + (pin * 4));
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if (mode == OpenDrain) {
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*reg |= (1 << 10);
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} else {
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uint32_t tmp = *reg;
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tmp &= ~(0x3 << 3);
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tmp |= (mode & 0x3) << 3;
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*reg = tmp;
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}
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}
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