mbed library sources. Supersedes mbed-src.
Fork of mbed by
targets/hal/TARGET_STM/TARGET_STM32L0/gpio_api.c@0:9b334a45a8ff, 2015-10-01 (annotated)
- Committer:
- bogdanm
- Date:
- Thu Oct 01 15:25:22 2015 +0300
- Revision:
- 0:9b334a45a8ff
- Child:
- 144:ef7eb2e8f9f7
Initial commit on mbed-dev
Replaces mbed-src (now inactive)
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 0:9b334a45a8ff | 1 | /* mbed Microcontroller Library |
bogdanm | 0:9b334a45a8ff | 2 | ******************************************************************************* |
bogdanm | 0:9b334a45a8ff | 3 | * Copyright (c) 2015, STMicroelectronics |
bogdanm | 0:9b334a45a8ff | 4 | * All rights reserved. |
bogdanm | 0:9b334a45a8ff | 5 | * |
bogdanm | 0:9b334a45a8ff | 6 | * Redistribution and use in source and binary forms, with or without |
bogdanm | 0:9b334a45a8ff | 7 | * modification, are permitted provided that the following conditions are met: |
bogdanm | 0:9b334a45a8ff | 8 | * |
bogdanm | 0:9b334a45a8ff | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
bogdanm | 0:9b334a45a8ff | 10 | * this list of conditions and the following disclaimer. |
bogdanm | 0:9b334a45a8ff | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
bogdanm | 0:9b334a45a8ff | 12 | * this list of conditions and the following disclaimer in the documentation |
bogdanm | 0:9b334a45a8ff | 13 | * and/or other materials provided with the distribution. |
bogdanm | 0:9b334a45a8ff | 14 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
bogdanm | 0:9b334a45a8ff | 15 | * may be used to endorse or promote products derived from this software |
bogdanm | 0:9b334a45a8ff | 16 | * without specific prior written permission. |
bogdanm | 0:9b334a45a8ff | 17 | * |
bogdanm | 0:9b334a45a8ff | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
bogdanm | 0:9b334a45a8ff | 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
bogdanm | 0:9b334a45a8ff | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
bogdanm | 0:9b334a45a8ff | 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
bogdanm | 0:9b334a45a8ff | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
bogdanm | 0:9b334a45a8ff | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
bogdanm | 0:9b334a45a8ff | 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
bogdanm | 0:9b334a45a8ff | 25 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
bogdanm | 0:9b334a45a8ff | 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
bogdanm | 0:9b334a45a8ff | 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
bogdanm | 0:9b334a45a8ff | 28 | ******************************************************************************* |
bogdanm | 0:9b334a45a8ff | 29 | */ |
bogdanm | 0:9b334a45a8ff | 30 | #include "mbed_assert.h" |
bogdanm | 0:9b334a45a8ff | 31 | #include "gpio_api.h" |
bogdanm | 0:9b334a45a8ff | 32 | #include "pinmap.h" |
bogdanm | 0:9b334a45a8ff | 33 | #include "mbed_error.h" |
bogdanm | 0:9b334a45a8ff | 34 | |
bogdanm | 0:9b334a45a8ff | 35 | extern uint32_t Set_GPIO_Clock(uint32_t port_idx); |
bogdanm | 0:9b334a45a8ff | 36 | |
bogdanm | 0:9b334a45a8ff | 37 | uint32_t gpio_set(PinName pin) |
bogdanm | 0:9b334a45a8ff | 38 | { |
bogdanm | 0:9b334a45a8ff | 39 | MBED_ASSERT(pin != (PinName)NC); |
bogdanm | 0:9b334a45a8ff | 40 | |
bogdanm | 0:9b334a45a8ff | 41 | pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
bogdanm | 0:9b334a45a8ff | 42 | return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask |
bogdanm | 0:9b334a45a8ff | 43 | } |
bogdanm | 0:9b334a45a8ff | 44 | |
bogdanm | 0:9b334a45a8ff | 45 | void gpio_init(gpio_t *obj, PinName pin) |
bogdanm | 0:9b334a45a8ff | 46 | { |
bogdanm | 0:9b334a45a8ff | 47 | obj->pin = pin; |
bogdanm | 0:9b334a45a8ff | 48 | if (pin == (PinName)NC) |
bogdanm | 0:9b334a45a8ff | 49 | return; |
bogdanm | 0:9b334a45a8ff | 50 | |
bogdanm | 0:9b334a45a8ff | 51 | uint32_t port_index = STM_PORT(pin); |
bogdanm | 0:9b334a45a8ff | 52 | |
bogdanm | 0:9b334a45a8ff | 53 | // Enable GPIO clock |
bogdanm | 0:9b334a45a8ff | 54 | uint32_t gpio_add = Set_GPIO_Clock(port_index); |
bogdanm | 0:9b334a45a8ff | 55 | GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add; |
bogdanm | 0:9b334a45a8ff | 56 | |
bogdanm | 0:9b334a45a8ff | 57 | // Fill GPIO object structure for future use |
bogdanm | 0:9b334a45a8ff | 58 | obj->mask = gpio_set(pin); |
bogdanm | 0:9b334a45a8ff | 59 | obj->reg_in = &gpio->IDR; |
bogdanm | 0:9b334a45a8ff | 60 | obj->reg_set = &gpio->BSRR; |
bogdanm | 0:9b334a45a8ff | 61 | obj->reg_clr = &gpio->BRR; |
bogdanm | 0:9b334a45a8ff | 62 | } |
bogdanm | 0:9b334a45a8ff | 63 | |
bogdanm | 0:9b334a45a8ff | 64 | void gpio_mode(gpio_t *obj, PinMode mode) |
bogdanm | 0:9b334a45a8ff | 65 | { |
bogdanm | 0:9b334a45a8ff | 66 | pin_mode(obj->pin, mode); |
bogdanm | 0:9b334a45a8ff | 67 | } |
bogdanm | 0:9b334a45a8ff | 68 | |
bogdanm | 0:9b334a45a8ff | 69 | void gpio_dir(gpio_t *obj, PinDirection direction) |
bogdanm | 0:9b334a45a8ff | 70 | { |
bogdanm | 0:9b334a45a8ff | 71 | MBED_ASSERT(obj->pin != (PinName)NC); |
bogdanm | 0:9b334a45a8ff | 72 | if (direction == PIN_OUTPUT) { |
bogdanm | 0:9b334a45a8ff | 73 | pin_function(obj->pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0)); |
bogdanm | 0:9b334a45a8ff | 74 | } else { // PIN_INPUT |
bogdanm | 0:9b334a45a8ff | 75 | pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
bogdanm | 0:9b334a45a8ff | 76 | } |
bogdanm | 0:9b334a45a8ff | 77 | } |