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