Ermanno Brusadin / mbed-src

mbed library sources

targets/hal/TARGET_NXP/TARGET_LPC11U6X/pinmap.c@0:0a673c671a56, 2016-07-27 (annotated)

Committer:
ebrus
Date:
Wed Jul 27 18:35:32 2016 +0000
Revision:
0:0a673c671a56
4

Who changed what in which revision?

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ebrus 0:0a673c671a56 1 /* mbed Microcontroller Library
ebrus 0:0a673c671a56 2 * Copyright (c) 2006-2013 ARM Limited
ebrus 0:0a673c671a56 3 *
ebrus 0:0a673c671a56 4 * Licensed under the Apache License, Version 2.0 (the "License");
ebrus 0:0a673c671a56 5 * you may not use this file except in compliance with the License.
ebrus 0:0a673c671a56 6 * You may obtain a copy of the License at
ebrus 0:0a673c671a56 7 *
ebrus 0:0a673c671a56 8 * http://www.apache.org/licenses/LICENSE-2.0
ebrus 0:0a673c671a56 9 *
ebrus 0:0a673c671a56 10 * Unless required by applicable law or agreed to in writing, software
ebrus 0:0a673c671a56 11 * distributed under the License is distributed on an "AS IS" BASIS,
ebrus 0:0a673c671a56 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ebrus 0:0a673c671a56 13 * See the License for the specific language governing permissions and
ebrus 0:0a673c671a56 14 * limitations under the License.
ebrus 0:0a673c671a56 15 */
ebrus 0:0a673c671a56 16 #include "mbed_assert.h"
ebrus 0:0a673c671a56 17 #include "pinmap.h"
ebrus 0:0a673c671a56 18 #include "mbed_error.h"
ebrus 0:0a673c671a56 19
ebrus 0:0a673c671a56 20 void pin_function(PinName pin, int function) {
ebrus 0:0a673c671a56 21 MBED_ASSERT(pin != (PinName)NC);
ebrus 0:0a673c671a56 22 __IO uint32_t *reg = (__IO uint32_t*)(LPC_IOCON_BASE + (pin & 0x1FF));
ebrus 0:0a673c671a56 23
ebrus 0:0a673c671a56 24 // pin function bits: [2:0] -> 111 = (0x7)
ebrus 0:0a673c671a56 25 *reg = (*reg & ~0x7) | (function & 0x7);
ebrus 0:0a673c671a56 26 }
ebrus 0:0a673c671a56 27
ebrus 0:0a673c671a56 28 void pin_mode(PinName pin, PinMode mode) {
ebrus 0:0a673c671a56 29 MBED_ASSERT(pin != (PinName)NC);
ebrus 0:0a673c671a56 30 if ((pin == P0_4) || (pin == P0_5)) {
ebrus 0:0a673c671a56 31 // The true open-drain pins PIO0_4 and PIO0_5 can be configured for different I2C-bus speeds.
ebrus 0:0a673c671a56 32 return;
ebrus 0:0a673c671a56 33 }
ebrus 0:0a673c671a56 34
ebrus 0:0a673c671a56 35 __IO uint32_t *reg = (__IO uint32_t*)(LPC_IOCON_BASE + (pin & 0x1FF));
ebrus 0:0a673c671a56 36
ebrus 0:0a673c671a56 37 if (mode == OpenDrain) {
ebrus 0:0a673c671a56 38 *reg |= (1 << 10);
ebrus 0:0a673c671a56 39 } else {
ebrus 0:0a673c671a56 40 uint32_t tmp = *reg;
ebrus 0:0a673c671a56 41 tmp &= ~(0x3 << 3);
ebrus 0:0a673c671a56 42 tmp |= (mode & 0x3) << 3;
ebrus 0:0a673c671a56 43 *reg = tmp;
ebrus 0:0a673c671a56 44 }
ebrus 0:0a673c671a56 45 }