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git.gir.st - tmk_keyboard.git/blob - tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/gpio_api.c
1 /* mbed Microcontroller Library
2 *******************************************************************************
3 * Copyright (c) 2014, STMicroelectronics
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *******************************************************************************
30 #include "mbed_assert.h"
33 #include "mbed_error.h"
35 extern uint32_t Set_GPIO_Clock(uint32_t port_idx
);
37 uint32_t gpio_set(PinName pin
)
39 MBED_ASSERT(pin
!= (PinName
)NC
);
41 pin_function(pin
, STM_PIN_DATA(STM_MODE_INPUT
, GPIO_NOPULL
, 0));
42 return (uint32_t)(1 << ((uint32_t)pin
& 0xF)); // Return the pin mask
45 void gpio_init(gpio_t
*obj
, PinName pin
)
48 if (pin
== (PinName
)NC
)
51 uint32_t port_index
= STM_PORT(pin
);
54 uint32_t gpio_add
= Set_GPIO_Clock(port_index
);
55 GPIO_TypeDef
*gpio
= (GPIO_TypeDef
*)gpio_add
;
57 // Fill GPIO object structure for future use
58 obj
->mask
= gpio_set(pin
);
59 obj
->reg_in
= &gpio
->IDR
;
60 obj
->reg_set
= &gpio
->BSRRL
;
61 obj
->reg_clr
= &gpio
->BSRRH
;
64 void gpio_mode(gpio_t
*obj
, PinMode mode
)
66 pin_mode(obj
->pin
, mode
);
69 void gpio_dir(gpio_t
*obj
, PinDirection direction
)
71 MBED_ASSERT(obj
->pin
!= (PinName
)NC
);
72 if (direction
== PIN_OUTPUT
) {
73 pin_function(obj
->pin
, STM_PIN_DATA(STM_MODE_OUTPUT_PP
, GPIO_NOPULL
, 0));
75 pin_function(obj
->pin
, STM_PIN_DATA(STM_MODE_INPUT
, GPIO_NOPULL
, 0));