Bob Seque / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/hal/TARGET_NXP/TARGET_LPC11UXX/pinmap.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 17 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 18 #include "mbed_error.h"
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 #define LPC_IOCON0_BASE (LPC_IOCON_BASE)
bogdanm 0:9b334a45a8ff 21 #define LPC_IOCON1_BASE (LPC_IOCON_BASE + 0x60)
bogdanm 0:9b334a45a8ff 22
bogdanm 0:9b334a45a8ff 23 void pin_function(PinName pin, int function) {
bogdanm 0:9b334a45a8ff 24 MBED_ASSERT(pin != (PinName)NC);
bogdanm 0:9b334a45a8ff 25 if (pin == (PinName)NC) return;
bogdanm 0:9b334a45a8ff 26
bogdanm 0:9b334a45a8ff 27 uint32_t pin_number = (uint32_t)pin;
bogdanm 0:9b334a45a8ff 28
bogdanm 0:9b334a45a8ff 29 __IO uint32_t *reg = (pin_number < 32) ?
bogdanm 0:9b334a45a8ff 30 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
bogdanm 0:9b334a45a8ff 31 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 // pin function bits: [2:0] -> 111 = (0x7)
bogdanm 0:9b334a45a8ff 34 *reg = (*reg & ~0x7) | (function & 0x7);
bogdanm 0:9b334a45a8ff 35 }
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 void pin_mode(PinName pin, PinMode mode) {
bogdanm 0:9b334a45a8ff 38 MBED_ASSERT(pin != (PinName)NC);
bogdanm 0:9b334a45a8ff 39 uint32_t pin_number = (uint32_t)pin;
bogdanm 0:9b334a45a8ff 40 uint32_t drain = ((uint32_t) mode & (uint32_t) OpenDrain) >> 2;
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42 __IO uint32_t *reg = (pin_number < 32) ?
bogdanm 0:9b334a45a8ff 43 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
bogdanm 0:9b334a45a8ff 44 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
bogdanm 0:9b334a45a8ff 45 uint32_t tmp = *reg;
bogdanm 0:9b334a45a8ff 46
bogdanm 0:9b334a45a8ff 47 // pin mode bits: [4:3] -> 11000 = (0x3 << 3)
bogdanm 0:9b334a45a8ff 48 tmp &= ~(0x3 << 3);
bogdanm 0:9b334a45a8ff 49 tmp |= (mode & 0x3) << 3;
bogdanm 0:9b334a45a8ff 50
bogdanm 0:9b334a45a8ff 51 // drain
bogdanm 0:9b334a45a8ff 52 tmp &= ~(0x1 << 10);
bogdanm 0:9b334a45a8ff 53 tmp |= drain << 10;
bogdanm 0:9b334a45a8ff 54
bogdanm 0:9b334a45a8ff 55 *reg = tmp;
bogdanm 0:9b334a45a8ff 56 }