Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_NXP/TARGET_LPC81X/pinmap.c@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

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 __IO uint32_t* IOCON_REGISTERS[18] = {
elessair 0:f269e3021894 21 &LPC_IOCON->PIO0_0 , &LPC_IOCON->PIO0_1 , &LPC_IOCON->PIO0_2 ,
elessair 0:f269e3021894 22 &LPC_IOCON->PIO0_3 , &LPC_IOCON->PIO0_4 , &LPC_IOCON->PIO0_5 ,
elessair 0:f269e3021894 23 &LPC_IOCON->PIO0_6 , &LPC_IOCON->PIO0_7 , &LPC_IOCON->PIO0_8 ,
elessair 0:f269e3021894 24 &LPC_IOCON->PIO0_9 , &LPC_IOCON->PIO0_10, &LPC_IOCON->PIO0_11,
elessair 0:f269e3021894 25 &LPC_IOCON->PIO0_12, &LPC_IOCON->PIO0_13, &LPC_IOCON->PIO0_14,
elessair 0:f269e3021894 26 &LPC_IOCON->PIO0_15, &LPC_IOCON->PIO0_16, &LPC_IOCON->PIO0_17,
elessair 0:f269e3021894 27 };
elessair 0:f269e3021894 28
elessair 0:f269e3021894 29 void pin_function(PinName pin, int function) {
elessair 0:f269e3021894 30 if (function == 0) {
elessair 0:f269e3021894 31 // Disable initial fixed function for P0_2, P0_3 and P0_5
elessair 0:f269e3021894 32 uint32_t enable = 0;
elessair 0:f269e3021894 33 if (pin == P0_2)
elessair 0:f269e3021894 34 enable = 1 << 3;
elessair 0:f269e3021894 35 else if (pin == P0_3)
elessair 0:f269e3021894 36 enable = 1 << 2;
elessair 0:f269e3021894 37 else if (pin == P0_5)
elessair 0:f269e3021894 38 enable = 1 << 6;
elessair 0:f269e3021894 39 LPC_SWM->PINENABLE0 |= enable;
elessair 0:f269e3021894 40 }
elessair 0:f269e3021894 41 }
elessair 0:f269e3021894 42
elessair 0:f269e3021894 43 void pin_mode(PinName pin, PinMode mode) {
elessair 0:f269e3021894 44 MBED_ASSERT(pin != (PinName)NC);
elessair 0:f269e3021894 45
elessair 0:f269e3021894 46 if ((pin == 10) || (pin == 11)) {
elessair 0:f269e3021894 47 // True open-drain pins can be configured for different I2C-bus speeds
elessair 0:f269e3021894 48 return;
elessair 0:f269e3021894 49 }
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 __IO uint32_t *reg = IOCON_REGISTERS[pin];
elessair 0:f269e3021894 52
elessair 0:f269e3021894 53 if (mode == OpenDrain) {
elessair 0:f269e3021894 54 *reg |= (1 << 10);
elessair 0:f269e3021894 55 } else {
elessair 0:f269e3021894 56 uint32_t tmp = *reg;
elessair 0:f269e3021894 57 tmp &= ~(0x3 << 3);
elessair 0:f269e3021894 58 tmp |= (mode & 0x3) << 3;
elessair 0:f269e3021894 59 *reg = tmp;
elessair 0:f269e3021894 60 }
elessair 0:f269e3021894 61 }