Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_NXP/TARGET_LPC82X/pinmap.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16 #include "mbed_assert.h"
elessair 0:f269e3021894 17 #include "pinmap.h"
elessair 0:f269e3021894 18 #include "mbed_error.h"
elessair 0:f269e3021894 19
elessair 0:f269e3021894 20
elessair 0:f269e3021894 21 void pin_function(PinName pin, int function)
elessair 0:f269e3021894 22 {
elessair 0:f269e3021894 23 // do nothing
elessair 0:f269e3021894 24 return;
elessair 0:f269e3021894 25 }
elessair 0:f269e3021894 26
elessair 0:f269e3021894 27 void pin_mode(PinName pin, PinMode mode)
elessair 0:f269e3021894 28 {
elessair 0:f269e3021894 29 MBED_ASSERT(pin != (PinName)NC);
elessair 0:f269e3021894 30
elessair 0:f269e3021894 31 if ((pin == P0_10) || (pin == P0_11)) {
elessair 0:f269e3021894 32 // True open-drain pins can be configured for different I2C-bus speeds
elessair 0:f269e3021894 33 return;
elessair 0:f269e3021894 34 }
elessair 0:f269e3021894 35
elessair 0:f269e3021894 36 __IO uint32_t *reg = (uint32_t *)(LPC_IOCON_BASE + (pin & 0xFF));
elessair 0:f269e3021894 37
elessair 0:f269e3021894 38 if (mode == OpenDrain) {
elessair 0:f269e3021894 39 *reg |= (1 << 10);
elessair 0:f269e3021894 40 } else {
elessair 0:f269e3021894 41 uint32_t tmp = *reg;
elessair 0:f269e3021894 42 tmp &= ~(0x3 << 3);
elessair 0:f269e3021894 43 tmp |= (mode & 0x3) << 3;
elessair 0:f269e3021894 44 *reg = tmp;
elessair 0:f269e3021894 45 }
elessair 0:f269e3021894 46 }