EL4121 Embedded System / mbed-os

mbed-os

Dependents:   cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more

targets/TARGET_NXP/TARGET_LPC11UXX/pinmap.c@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /* mbed Microcontroller Library
be_bryan 0:b74591d5ab33 2 * Copyright (c) 2006-2013 ARM Limited
be_bryan 0:b74591d5ab33 3 *
be_bryan 0:b74591d5ab33 4 * Licensed under the Apache License, Version 2.0 (the "License");
be_bryan 0:b74591d5ab33 5 * you may not use this file except in compliance with the License.
be_bryan 0:b74591d5ab33 6 * You may obtain a copy of the License at
be_bryan 0:b74591d5ab33 7 *
be_bryan 0:b74591d5ab33 8 * http://www.apache.org/licenses/LICENSE-2.0
be_bryan 0:b74591d5ab33 9 *
be_bryan 0:b74591d5ab33 10 * Unless required by applicable law or agreed to in writing, software
be_bryan 0:b74591d5ab33 11 * distributed under the License is distributed on an "AS IS" BASIS,
be_bryan 0:b74591d5ab33 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
be_bryan 0:b74591d5ab33 13 * See the License for the specific language governing permissions and
be_bryan 0:b74591d5ab33 14 * limitations under the License.
be_bryan 0:b74591d5ab33 15 */
be_bryan 0:b74591d5ab33 16 #include "mbed_assert.h"
be_bryan 0:b74591d5ab33 17 #include "pinmap.h"
be_bryan 0:b74591d5ab33 18 #include "mbed_error.h"
be_bryan 0:b74591d5ab33 19
be_bryan 0:b74591d5ab33 20 #define LPC_IOCON0_BASE (LPC_IOCON_BASE)
be_bryan 0:b74591d5ab33 21 #define LPC_IOCON1_BASE (LPC_IOCON_BASE + 0x60)
be_bryan 0:b74591d5ab33 22
be_bryan 0:b74591d5ab33 23 void pin_function(PinName pin, int function) {
be_bryan 0:b74591d5ab33 24 MBED_ASSERT(pin != (PinName)NC);
be_bryan 0:b74591d5ab33 25 if (pin == (PinName)NC) return;
be_bryan 0:b74591d5ab33 26
be_bryan 0:b74591d5ab33 27 uint32_t pin_number = (uint32_t)pin;
be_bryan 0:b74591d5ab33 28
be_bryan 0:b74591d5ab33 29 __IO uint32_t *reg = (pin_number < 32) ?
be_bryan 0:b74591d5ab33 30 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
be_bryan 0:b74591d5ab33 31 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
be_bryan 0:b74591d5ab33 32
be_bryan 0:b74591d5ab33 33 // pin function bits: [2:0] -> 111 = (0x7)
be_bryan 0:b74591d5ab33 34 *reg = (*reg & ~0x7) | (function & 0x7);
be_bryan 0:b74591d5ab33 35 }
be_bryan 0:b74591d5ab33 36
be_bryan 0:b74591d5ab33 37 void pin_mode(PinName pin, PinMode mode) {
be_bryan 0:b74591d5ab33 38 MBED_ASSERT(pin != (PinName)NC);
be_bryan 0:b74591d5ab33 39 uint32_t pin_number = (uint32_t)pin;
be_bryan 0:b74591d5ab33 40 uint32_t drain = ((uint32_t) mode & (uint32_t) OpenDrain) >> 2;
be_bryan 0:b74591d5ab33 41
be_bryan 0:b74591d5ab33 42 __IO uint32_t *reg = (pin_number < 32) ?
be_bryan 0:b74591d5ab33 43 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
be_bryan 0:b74591d5ab33 44 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
be_bryan 0:b74591d5ab33 45 uint32_t tmp = *reg;
be_bryan 0:b74591d5ab33 46
be_bryan 0:b74591d5ab33 47 // pin mode bits: [4:3] -> 11000 = (0x3 << 3)
be_bryan 0:b74591d5ab33 48 tmp &= ~(0x3 << 3);
be_bryan 0:b74591d5ab33 49 tmp |= (mode & 0x3) << 3;
be_bryan 0:b74591d5ab33 50
be_bryan 0:b74591d5ab33 51 // drain
be_bryan 0:b74591d5ab33 52 tmp &= ~(0x1 << 10);
be_bryan 0:b74591d5ab33 53 tmp |= drain << 10;
be_bryan 0:b74591d5ab33 54
be_bryan 0:b74591d5ab33 55 *reg = tmp;
be_bryan 0:b74591d5ab33 56 }