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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2014, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#include "mbed_assert.h"
#include "gpio_api.h"
#include "pinmap.h"
#include "mbed_error.h"
extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
uint32_t gpio_set(PinName pin)
{
MBED_ASSERT(pin != (PinName)NC);
pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
}
void gpio_init(gpio_t *obj, PinName pin)
{
obj->pin = pin;
if (pin == (PinName)NC) {
return;
}
uint32_t port_index = STM_PORT(pin);
// Enable GPIO clock
uint32_t gpio_add = Set_GPIO_Clock(port_index);
GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
// Fill GPIO object structure for future use
obj->mask = gpio_set(pin);
obj->reg_in = &gpio->IDR;
obj->reg_set = &gpio->BSRRL;
obj->reg_clr = &gpio->BSRRH;
}
void gpio_mode(gpio_t *obj, PinMode mode)
{
pin_mode(obj->pin, mode);
}
void gpio_dir(gpio_t *obj, PinDirection direction)
{
MBED_ASSERT(obj->pin != (PinName)NC);
if (direction == PIN_OUTPUT) {
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
} else { // PIN_INPUT
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
}
|