mirror of https://github.com/ARMmbed/mbed-os.git
62 lines
2.0 KiB
C
62 lines
2.0 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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__IO uint32_t* IOCON_REGISTERS[18] = {
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&LPC_IOCON->PIO0_0 , &LPC_IOCON->PIO0_1 , &LPC_IOCON->PIO0_2 ,
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&LPC_IOCON->PIO0_3 , &LPC_IOCON->PIO0_4 , &LPC_IOCON->PIO0_5 ,
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&LPC_IOCON->PIO0_6 , &LPC_IOCON->PIO0_7 , &LPC_IOCON->PIO0_8 ,
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&LPC_IOCON->PIO0_9 , &LPC_IOCON->PIO0_10, &LPC_IOCON->PIO0_11,
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&LPC_IOCON->PIO0_12, &LPC_IOCON->PIO0_13, &LPC_IOCON->PIO0_14,
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&LPC_IOCON->PIO0_15, &LPC_IOCON->PIO0_16, &LPC_IOCON->PIO0_17,
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};
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void pin_function(PinName pin, int function) {
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if (function == 0) {
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// Disable initial fixed function for P0_2, P0_3 and P0_5
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uint32_t enable = 0;
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if (pin == P0_2)
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enable = 1 << 3;
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else if (pin == P0_3)
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enable = 1 << 2;
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else if (pin == P0_5)
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enable = 1 << 6;
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LPC_SWM->PINENABLE0 |= enable;
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}
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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 == 10) || (pin == 11)) {
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// True open-drain pins 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 = IOCON_REGISTERS[pin];
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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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