Bob Seque / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/hal/TARGET_NXP/TARGET_LPC13XX/pinmap.c@57:dd901dec6bd0, 2016-01-30 (annotated)

Committer:
Splith
Date:
Sat Jan 30 16:48:54 2016 +0000
Revision:
57:dd901dec6bd0
Parent:
0:9b334a45a8ff 
Add USART3 pin mapping to Seeed arch max

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 17 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 18 #include "mbed_error.h"
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 #define LPC_IOCON0_BASE (LPC_IOCON_BASE)
bogdanm 0:9b334a45a8ff 21 #define LPC_IOCON1_BASE (LPC_IOCON_BASE + 0x60)
bogdanm 0:9b334a45a8ff 22
bogdanm 0:9b334a45a8ff 23 void pin_function(PinName pin, int function) {
bogdanm 0:9b334a45a8ff 24 MBED_ASSERT(pin != (PinName)NC);
bogdanm 0:9b334a45a8ff 25
bogdanm 0:9b334a45a8ff 26 uint32_t pin_number = (uint32_t)pin;
bogdanm 0:9b334a45a8ff 27
bogdanm 0:9b334a45a8ff 28 __IO uint32_t *reg = (pin_number < 32) ?
bogdanm 0:9b334a45a8ff 29 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
bogdanm 0:9b334a45a8ff 30 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
bogdanm 0:9b334a45a8ff 31
bogdanm 0:9b334a45a8ff 32 // pin function bits: [2:0] -> 111 = (0x7)
bogdanm 0:9b334a45a8ff 33 *reg = (*reg & ~0x7) | (function & 0x7);
bogdanm 0:9b334a45a8ff 34 }
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 void pin_mode(PinName pin, PinMode mode) {
bogdanm 0:9b334a45a8ff 37 MBED_ASSERT(pin != (PinName)NC);
bogdanm 0:9b334a45a8ff 38
bogdanm 0:9b334a45a8ff 39 uint32_t pin_number = (uint32_t)pin;
bogdanm 0:9b334a45a8ff 40 uint32_t drain = ((uint32_t) mode & (uint32_t) OpenDrain) >> 2;
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42 __IO uint32_t *reg = (pin_number < 32) ?
bogdanm 0:9b334a45a8ff 43 (__IO uint32_t*)(LPC_IOCON0_BASE + 4 * pin_number) :
bogdanm 0:9b334a45a8ff 44 (__IO uint32_t*)(LPC_IOCON1_BASE + 4 * (pin_number - 32));
bogdanm 0:9b334a45a8ff 45 uint32_t tmp = *reg;
bogdanm 0:9b334a45a8ff 46
bogdanm 0:9b334a45a8ff 47 // pin mode bits: [4:3] -> 11000 = (0x3 << 3)
bogdanm 0:9b334a45a8ff 48 tmp &= ~(0x3 << 3);
bogdanm 0:9b334a45a8ff 49 tmp |= (mode & 0x3) << 3;
bogdanm 0:9b334a45a8ff 50
bogdanm 0:9b334a45a8ff 51 // drain
bogdanm 0:9b334a45a8ff 52 tmp &= ~(0x1 << 10);
bogdanm 0:9b334a45a8ff 53 tmp |= drain << 10;
bogdanm 0:9b334a45a8ff 54
bogdanm 0:9b334a45a8ff 55 *reg = tmp;
bogdanm 0:9b334a45a8ff 56 }