blob: c72389d666f8585b309c06b04659a420a93660e5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/* mbed Microcontroller Library
* Copyright (c) 2006-2013 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "mbed_assert.h"
#include "pinmap.h"
#include "mbed_error.h"
void pin_function(PinName pin, int function) {
MBED_ASSERT(pin != (PinName)NC);
__IO uint32_t *reg = (__IO uint32_t*) (LPC_IOCON_BASE + 4 * pin);
// pin function bits: [2:0] -> 111 = (0x7)
*reg = (*reg & ~0x7) | (function & 0x7);
}
void pin_mode(PinName pin, PinMode mode) {
MBED_ASSERT(pin != (PinName)NC);
uint32_t drain = ((uint32_t) mode & (uint32_t) OpenDrain) >> 2;
__IO uint32_t *reg = (__IO uint32_t*) (LPC_IOCON_BASE + 4 * pin);
uint32_t tmp = *reg;
// pin mode bits: [4:3] -> 11000 = (0x3 << 3)
tmp &= ~(0x3 << 3);
tmp |= (mode & 0x3) << 3;
// drain
tmp &= ~(0x1 << 10);
tmp |= drain << 10;
*reg = tmp;
}
|
