Adam Kucybala / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC408X/pinmap.c@29:6ac4027eff2b, 2013-09-23 (annotated)

Committer:
mbed_official
Date:
Mon Sep 23 11:30:07 2013 +0100
Revision:
29:6ac4027eff2b
Parent:
15:4892fe388435 
Synchronized with git revision 4e23b72a78e8adfcaf3e52831780eca6d7a7bafe

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 15:4892fe388435 1 /* mbed Microcontroller Library
bogdanm 15:4892fe388435 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 15:4892fe388435 3 *
bogdanm 15:4892fe388435 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 15:4892fe388435 5 * you may not use this file except in compliance with the License.
bogdanm 15:4892fe388435 6 * You may obtain a copy of the License at
bogdanm 15:4892fe388435 7 *
bogdanm 15:4892fe388435 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 15:4892fe388435 9 *
bogdanm 15:4892fe388435 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 15:4892fe388435 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 15:4892fe388435 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 15:4892fe388435 13 * See the License for the specific language governing permissions and
bogdanm 15:4892fe388435 14 * limitations under the License.
bogdanm 15:4892fe388435 15 */
bogdanm 15:4892fe388435 16 #include "pinmap.h"
bogdanm 15:4892fe388435 17 #include "error.h"
bogdanm 15:4892fe388435 18
bogdanm 15:4892fe388435 19 void pin_function(PinName pin, int function) {
mbed_official 29:6ac4027eff2b 20 if (pin == (PinName)NC) return;
bogdanm 15:4892fe388435 21
bogdanm 15:4892fe388435 22 __IO uint32_t *reg = (__IO uint32_t*) (LPC_IOCON_BASE + 4 * pin);
bogdanm 15:4892fe388435 23
bogdanm 15:4892fe388435 24 // pin function bits: [2:0] -> 111 = (0x7)
bogdanm 15:4892fe388435 25 *reg = (*reg & ~0x7) | (function & 0x7);
bogdanm 15:4892fe388435 26 }
bogdanm 15:4892fe388435 27
bogdanm 15:4892fe388435 28 void pin_mode(PinName pin, PinMode mode) {
mbed_official 29:6ac4027eff2b 29 if (pin == (PinName)NC) { return; }
bogdanm 15:4892fe388435 30
bogdanm 15:4892fe388435 31 uint32_t drain = ((uint32_t) mode & (uint32_t) OpenDrain) >> 2;
bogdanm 15:4892fe388435 32
bogdanm 15:4892fe388435 33 __IO uint32_t *reg = (__IO uint32_t*) (LPC_IOCON_BASE + 4 * pin);
bogdanm 15:4892fe388435 34 uint32_t tmp = *reg;
bogdanm 15:4892fe388435 35
bogdanm 15:4892fe388435 36 // pin mode bits: [4:3] -> 11000 = (0x3 << 3)
bogdanm 15:4892fe388435 37 tmp &= ~(0x3 << 3);
bogdanm 15:4892fe388435 38 tmp |= (mode & 0x3) << 3;
bogdanm 15:4892fe388435 39
bogdanm 15:4892fe388435 40 // drain
bogdanm 15:4892fe388435 41 tmp &= ~(0x1 << 10);
bogdanm 15:4892fe388435 42 tmp |= drain << 10;
bogdanm 15:4892fe388435 43
bogdanm 15:4892fe388435 44 *reg = tmp;
bogdanm 15:4892fe388435 45 }