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Fork of OmniWheels by Gustav Atmel

mbed-os/targets/TARGET_NXP/TARGET_LPC408X/pinmap.c@1:9c5af431a1f1, 2018-05-01 (annotated)

Committer:
gustavatmel
Date:
Tue May 01 15:47:08 2018 +0000
Revision:
1:9c5af431a1f1
sdf

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gustavatmel 1:9c5af431a1f1 1 /* mbed Microcontroller Library
gustavatmel 1:9c5af431a1f1 2 * Copyright (c) 2006-2013 ARM Limited
gustavatmel 1:9c5af431a1f1 3 *
gustavatmel 1:9c5af431a1f1 4 * Licensed under the Apache License, Version 2.0 (the "License");
gustavatmel 1:9c5af431a1f1 5 * you may not use this file except in compliance with the License.
gustavatmel 1:9c5af431a1f1 6 * You may obtain a copy of the License at
gustavatmel 1:9c5af431a1f1 7 *
gustavatmel 1:9c5af431a1f1 8 * http://www.apache.org/licenses/LICENSE-2.0
gustavatmel 1:9c5af431a1f1 9 *
gustavatmel 1:9c5af431a1f1 10 * Unless required by applicable law or agreed to in writing, software
gustavatmel 1:9c5af431a1f1 11 * distributed under the License is distributed on an "AS IS" BASIS,
gustavatmel 1:9c5af431a1f1 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
gustavatmel 1:9c5af431a1f1 13 * See the License for the specific language governing permissions and
gustavatmel 1:9c5af431a1f1 14 * limitations under the License.
gustavatmel 1:9c5af431a1f1 15 */
gustavatmel 1:9c5af431a1f1 16 #include "mbed_assert.h"
gustavatmel 1:9c5af431a1f1 17 #include "pinmap.h"
gustavatmel 1:9c5af431a1f1 18 #include "mbed_error.h"
gustavatmel 1:9c5af431a1f1 19
gustavatmel 1:9c5af431a1f1 20 void pin_function(PinName pin, int function) {
gustavatmel 1:9c5af431a1f1 21 MBED_ASSERT(pin != (PinName)NC);
gustavatmel 1:9c5af431a1f1 22 __IO uint32_t *reg = (__IO uint32_t*) (LPC_IOCON_BASE + 4 * pin);
gustavatmel 1:9c5af431a1f1 23
gustavatmel 1:9c5af431a1f1 24 // pin function bits: [2:0] -> 111 = (0x7)
gustavatmel 1:9c5af431a1f1 25 *reg = (*reg & ~0x7) | (function & 0x7);
gustavatmel 1:9c5af431a1f1 26 }
gustavatmel 1:9c5af431a1f1 27
gustavatmel 1:9c5af431a1f1 28 void pin_mode(PinName pin, PinMode mode) {
gustavatmel 1:9c5af431a1f1 29 MBED_ASSERT(pin != (PinName)NC);
gustavatmel 1:9c5af431a1f1 30
gustavatmel 1:9c5af431a1f1 31 uint32_t drain = ((uint32_t) mode & (uint32_t) OpenDrain) >> 2;
gustavatmel 1:9c5af431a1f1 32
gustavatmel 1:9c5af431a1f1 33 __IO uint32_t *reg = (__IO uint32_t*) (LPC_IOCON_BASE + 4 * pin);
gustavatmel 1:9c5af431a1f1 34 uint32_t tmp = *reg;
gustavatmel 1:9c5af431a1f1 35
gustavatmel 1:9c5af431a1f1 36 // pin mode bits: [4:3] -> 11000 = (0x3 << 3)
gustavatmel 1:9c5af431a1f1 37 tmp &= ~(0x3 << 3);
gustavatmel 1:9c5af431a1f1 38 tmp |= (mode & 0x3) << 3;
gustavatmel 1:9c5af431a1f1 39
gustavatmel 1:9c5af431a1f1 40 // drain
gustavatmel 1:9c5af431a1f1 41 tmp &= ~(0x1 << 10);
gustavatmel 1:9c5af431a1f1 42 tmp |= drain << 10;
gustavatmel 1:9c5af431a1f1 43
gustavatmel 1:9c5af431a1f1 44 *reg = tmp;
gustavatmel 1:9c5af431a1f1 45 }