Mateusz Kowalik / Application

USB Serial application

Fork of USBSerial_HelloWorld by Samuel Mokrani

mbed-dev/targets/TARGET_NXP/TARGET_LPC11UXX/pinmap.c@10:41552d038a69, 2017-01-10 (annotated)

Committer:
Zaitsev
Date:
Tue Jan 10 20:42:26 2017 +0000
Revision:
10:41552d038a69
USB Serial bi-directional bridge

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Zaitsev 10:41552d038a69 1 /* mbed Microcontroller Library
Zaitsev 10:41552d038a69 2 * Copyright (c) 2006-2013 ARM Limited
Zaitsev 10:41552d038a69 3 *
Zaitsev 10:41552d038a69 4 * Licensed under the Apache License, Version 2.0 (the "License");
Zaitsev 10:41552d038a69 5 * you may not use this file except in compliance with the License.
Zaitsev 10:41552d038a69 6 * You may obtain a copy of the License at
Zaitsev 10:41552d038a69 7 *
Zaitsev 10:41552d038a69 8 * http://www.apache.org/licenses/LICENSE-2.0
Zaitsev 10:41552d038a69 9 *
Zaitsev 10:41552d038a69 10 * Unless required by applicable law or agreed to in writing, software
Zaitsev 10:41552d038a69 11 * distributed under the License is distributed on an "AS IS" BASIS,
Zaitsev 10:41552d038a69 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Zaitsev 10:41552d038a69 13 * See the License for the specific language governing permissions and
Zaitsev 10:41552d038a69 14 * limitations under the License.
Zaitsev 10:41552d038a69 15 */
Zaitsev 10:41552d038a69 16 #include "mbed_assert.h"
Zaitsev 10:41552d038a69 17 #include "pinmap.h"
Zaitsev 10:41552d038a69 18 #include "mbed_error.h"
Zaitsev 10:41552d038a69 19
Zaitsev 10:41552d038a69 20 #define LPC_IOCON0_BASE (LPC_IOCON_BASE)
Zaitsev 10:41552d038a69 21 #define LPC_IOCON1_BASE (LPC_IOCON_BASE + 0x60)
Zaitsev 10:41552d038a69 22
Zaitsev 10:41552d038a69 23 void pin_function(PinName pin, int function) {
Zaitsev 10:41552d038a69 24 MBED_ASSERT(pin != (PinName)NC);
Zaitsev 10:41552d038a69 25 if (pin == (PinName)NC) return;
Zaitsev 10:41552d038a69 26
Zaitsev 10:41552d038a69 27 uint32_t pin_number = (uint32_t)pin;
Zaitsev 10:41552d038a69 28
Zaitsev 10:41552d038a69 29 __IO uint32_t *reg = (pin_number < 32) ?
Zaitsev 10:41552d038a69 30 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
Zaitsev 10:41552d038a69 31 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
Zaitsev 10:41552d038a69 32
Zaitsev 10:41552d038a69 33 // pin function bits: [2:0] -> 111 = (0x7)
Zaitsev 10:41552d038a69 34 *reg = (*reg & ~0x7) | (function & 0x7);
Zaitsev 10:41552d038a69 35 }
Zaitsev 10:41552d038a69 36
Zaitsev 10:41552d038a69 37 void pin_mode(PinName pin, PinMode mode) {
Zaitsev 10:41552d038a69 38 MBED_ASSERT(pin != (PinName)NC);
Zaitsev 10:41552d038a69 39 uint32_t pin_number = (uint32_t)pin;
Zaitsev 10:41552d038a69 40 uint32_t drain = ((uint32_t) mode & (uint32_t) OpenDrain) >> 2;
Zaitsev 10:41552d038a69 41
Zaitsev 10:41552d038a69 42 __IO uint32_t *reg = (pin_number < 32) ?
Zaitsev 10:41552d038a69 43 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
Zaitsev 10:41552d038a69 44 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
Zaitsev 10:41552d038a69 45 uint32_t tmp = *reg;
Zaitsev 10:41552d038a69 46
Zaitsev 10:41552d038a69 47 // pin mode bits: [4:3] -> 11000 = (0x3 << 3)
Zaitsev 10:41552d038a69 48 tmp &= ~(0x3 << 3);
Zaitsev 10:41552d038a69 49 tmp |= (mode & 0x3) << 3;
Zaitsev 10:41552d038a69 50
Zaitsev 10:41552d038a69 51 // drain
Zaitsev 10:41552d038a69 52 tmp &= ~(0x1 << 10);
Zaitsev 10:41552d038a69 53 tmp |= drain << 10;
Zaitsev 10:41552d038a69 54
Zaitsev 10:41552d038a69 55 *reg = tmp;
Zaitsev 10:41552d038a69 56 }