BA / SerialCom

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Fork of OmniWheels by Gustav Atmel

mbed-os/targets/TARGET_NXP/TARGET_LPC11UXX/pinmap.c@2:798925c9e4a8, 2018-05-01 (annotated)

Committer:
gustavatmel
Date:
Tue May 01 15:55:34 2018 +0000
Revision:
2:798925c9e4a8
Parent:
1:9c5af431a1f1 
bluetooth

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 #define LPC_IOCON0_BASE (LPC_IOCON_BASE)
gustavatmel 1:9c5af431a1f1 21 #define LPC_IOCON1_BASE (LPC_IOCON_BASE + 0x60)
gustavatmel 1:9c5af431a1f1 22
gustavatmel 1:9c5af431a1f1 23 void pin_function(PinName pin, int function) {
gustavatmel 1:9c5af431a1f1 24 MBED_ASSERT(pin != (PinName)NC);
gustavatmel 1:9c5af431a1f1 25 if (pin == (PinName)NC) return;
gustavatmel 1:9c5af431a1f1 26
gustavatmel 1:9c5af431a1f1 27 uint32_t pin_number = (uint32_t)pin;
gustavatmel 1:9c5af431a1f1 28
gustavatmel 1:9c5af431a1f1 29 __IO uint32_t *reg = (pin_number < 32) ?
gustavatmel 1:9c5af431a1f1 30 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
gustavatmel 1:9c5af431a1f1 31 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
gustavatmel 1:9c5af431a1f1 32
gustavatmel 1:9c5af431a1f1 33 // pin function bits: [2:0] -> 111 = (0x7)
gustavatmel 1:9c5af431a1f1 34 *reg = (*reg & ~0x7) | (function & 0x7);
gustavatmel 1:9c5af431a1f1 35 }
gustavatmel 1:9c5af431a1f1 36
gustavatmel 1:9c5af431a1f1 37 void pin_mode(PinName pin, PinMode mode) {
gustavatmel 1:9c5af431a1f1 38 MBED_ASSERT(pin != (PinName)NC);
gustavatmel 1:9c5af431a1f1 39 uint32_t pin_number = (uint32_t)pin;
gustavatmel 1:9c5af431a1f1 40 uint32_t drain = ((uint32_t) mode & (uint32_t) OpenDrain) >> 2;
gustavatmel 1:9c5af431a1f1 41
gustavatmel 1:9c5af431a1f1 42 __IO uint32_t *reg = (pin_number < 32) ?
gustavatmel 1:9c5af431a1f1 43 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
gustavatmel 1:9c5af431a1f1 44 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
gustavatmel 1:9c5af431a1f1 45 uint32_t tmp = *reg;
gustavatmel 1:9c5af431a1f1 46
gustavatmel 1:9c5af431a1f1 47 // pin mode bits: [4:3] -> 11000 = (0x3 << 3)
gustavatmel 1:9c5af431a1f1 48 tmp &= ~(0x3 << 3);
gustavatmel 1:9c5af431a1f1 49 tmp |= (mode & 0x3) << 3;
gustavatmel 1:9c5af431a1f1 50
gustavatmel 1:9c5af431a1f1 51 // drain
gustavatmel 1:9c5af431a1f1 52 tmp &= ~(0x1 << 10);
gustavatmel 1:9c5af431a1f1 53 tmp |= drain << 10;
gustavatmel 1:9c5af431a1f1 54
gustavatmel 1:9c5af431a1f1 55 *reg = tmp;
gustavatmel 1:9c5af431a1f1 56 }