Ermanno Brusadin / mbed-src

mbed library sources

targets/hal/TARGET_NXP/TARGET_LPC11UXX/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 #define LPC_IOCON0_BASE (LPC_IOCON_BASE)
ebrus 0:0a673c671a56 21 #define LPC_IOCON1_BASE (LPC_IOCON_BASE + 0x60)
ebrus 0:0a673c671a56 22
ebrus 0:0a673c671a56 23 void pin_function(PinName pin, int function) {
ebrus 0:0a673c671a56 24 MBED_ASSERT(pin != (PinName)NC);
ebrus 0:0a673c671a56 25 if (pin == (PinName)NC) return;
ebrus 0:0a673c671a56 26
ebrus 0:0a673c671a56 27 uint32_t pin_number = (uint32_t)pin;
ebrus 0:0a673c671a56 28
ebrus 0:0a673c671a56 29 __IO uint32_t *reg = (pin_number < 32) ?
ebrus 0:0a673c671a56 30 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
ebrus 0:0a673c671a56 31 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
ebrus 0:0a673c671a56 32
ebrus 0:0a673c671a56 33 // pin function bits: [2:0] -> 111 = (0x7)
ebrus 0:0a673c671a56 34 *reg = (*reg & ~0x7) | (function & 0x7);
ebrus 0:0a673c671a56 35 }
ebrus 0:0a673c671a56 36
ebrus 0:0a673c671a56 37 void pin_mode(PinName pin, PinMode mode) {
ebrus 0:0a673c671a56 38 MBED_ASSERT(pin != (PinName)NC);
ebrus 0:0a673c671a56 39 uint32_t pin_number = (uint32_t)pin;
ebrus 0:0a673c671a56 40 uint32_t drain = ((uint32_t) mode & (uint32_t) OpenDrain) >> 2;
ebrus 0:0a673c671a56 41
ebrus 0:0a673c671a56 42 __IO uint32_t *reg = (pin_number < 32) ?
ebrus 0:0a673c671a56 43 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
ebrus 0:0a673c671a56 44 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
ebrus 0:0a673c671a56 45 uint32_t tmp = *reg;
ebrus 0:0a673c671a56 46
ebrus 0:0a673c671a56 47 // pin mode bits: [4:3] -> 11000 = (0x3 << 3)
ebrus 0:0a673c671a56 48 tmp &= ~(0x3 << 3);
ebrus 0:0a673c671a56 49 tmp |= (mode & 0x3) << 3;
ebrus 0:0a673c671a56 50
ebrus 0:0a673c671a56 51 // drain
ebrus 0:0a673c671a56 52 tmp &= ~(0x1 << 10);
ebrus 0:0a673c671a56 53 tmp |= drain << 10;
ebrus 0:0a673c671a56 54
ebrus 0:0a673c671a56 55 *reg = tmp;
ebrus 0:0a673c671a56 56 }