mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/gpio_api.c@52:a51c77007319, 2013-12-02 (annotated)
- Committer:
- mbed_official
- Date:
- Mon Dec 02 11:30:05 2013 +0000
- Revision:
- 52:a51c77007319
- Child:
- 70:c1fbde68b492
Synchronized with git revision 49df530ae72ce97ccc773d1f2c13b38e868e6abd
Full URL: https://github.com/mbedmicro/mbed/commit/49df530ae72ce97ccc773d1f2c13b38e868e6abd/
Add STMicroelectronics NUCLEO_F103RB target
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 52:a51c77007319 | 1 | /* mbed Microcontroller Library |
mbed_official | 52:a51c77007319 | 2 | * Copyright (c) 2006-2013 ARM Limited |
mbed_official | 52:a51c77007319 | 3 | * |
mbed_official | 52:a51c77007319 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 52:a51c77007319 | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 52:a51c77007319 | 6 | * You may obtain a copy of the License at |
mbed_official | 52:a51c77007319 | 7 | * |
mbed_official | 52:a51c77007319 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 52:a51c77007319 | 9 | * |
mbed_official | 52:a51c77007319 | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 52:a51c77007319 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 52:a51c77007319 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 52:a51c77007319 | 13 | * See the License for the specific language governing permissions and |
mbed_official | 52:a51c77007319 | 14 | * limitations under the License. |
mbed_official | 52:a51c77007319 | 15 | */ |
mbed_official | 52:a51c77007319 | 16 | #include "gpio_api.h" |
mbed_official | 52:a51c77007319 | 17 | #include "pinmap.h" |
mbed_official | 52:a51c77007319 | 18 | |
mbed_official | 52:a51c77007319 | 19 | uint32_t gpio_set(PinName pin) { |
mbed_official | 52:a51c77007319 | 20 | if (pin == NC) return 0; |
mbed_official | 52:a51c77007319 | 21 | |
mbed_official | 52:a51c77007319 | 22 | pin_function(pin, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0)); |
mbed_official | 52:a51c77007319 | 23 | |
mbed_official | 52:a51c77007319 | 24 | return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask |
mbed_official | 52:a51c77007319 | 25 | } |
mbed_official | 52:a51c77007319 | 26 | |
mbed_official | 52:a51c77007319 | 27 | void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) { |
mbed_official | 52:a51c77007319 | 28 | if (pin == NC) return; |
mbed_official | 52:a51c77007319 | 29 | |
mbed_official | 52:a51c77007319 | 30 | // Get GPIO structure base address |
mbed_official | 52:a51c77007319 | 31 | uint32_t pin_number = (uint32_t)pin; |
mbed_official | 52:a51c77007319 | 32 | uint32_t port_index = (pin_number >> 4); |
mbed_official | 52:a51c77007319 | 33 | GPIO_TypeDef *gpio = (GPIO_TypeDef *)(GPIOA_BASE + (port_index << 10)); |
mbed_official | 52:a51c77007319 | 34 | |
mbed_official | 52:a51c77007319 | 35 | // Fill GPIO object structure for future use |
mbed_official | 52:a51c77007319 | 36 | obj->pin = pin; |
mbed_official | 52:a51c77007319 | 37 | obj->mask = gpio_set(pin); |
mbed_official | 52:a51c77007319 | 38 | obj->reg_in = &gpio->IDR; |
mbed_official | 52:a51c77007319 | 39 | obj->reg_set = &gpio->BSRR; |
mbed_official | 52:a51c77007319 | 40 | obj->reg_clr = &gpio->BRR; |
mbed_official | 52:a51c77007319 | 41 | |
mbed_official | 52:a51c77007319 | 42 | // Configure GPIO |
mbed_official | 52:a51c77007319 | 43 | if (direction == PIN_OUTPUT) { |
mbed_official | 52:a51c77007319 | 44 | pin_function(pin, STM_PIN_DATA(GPIO_Mode_Out_PP, 0)); |
mbed_official | 52:a51c77007319 | 45 | } |
mbed_official | 52:a51c77007319 | 46 | else { // PIN_INPUT |
mbed_official | 52:a51c77007319 | 47 | pin_function(pin, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0)); |
mbed_official | 52:a51c77007319 | 48 | } |
mbed_official | 52:a51c77007319 | 49 | } |
mbed_official | 52:a51c77007319 | 50 | |
mbed_official | 52:a51c77007319 | 51 | void gpio_mode(gpio_t *obj, PinMode mode) { |
mbed_official | 52:a51c77007319 | 52 | pin_mode(obj->pin, mode); |
mbed_official | 52:a51c77007319 | 53 | } |
mbed_official | 52:a51c77007319 | 54 | |
mbed_official | 52:a51c77007319 | 55 | void gpio_dir(gpio_t *obj, PinDirection direction) { |
mbed_official | 52:a51c77007319 | 56 | if (direction == PIN_OUTPUT) { |
mbed_official | 52:a51c77007319 | 57 | pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_Out_PP, 0)); |
mbed_official | 52:a51c77007319 | 58 | } |
mbed_official | 52:a51c77007319 | 59 | else { // PIN_INPUT |
mbed_official | 52:a51c77007319 | 60 | pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0)); |
mbed_official | 52:a51c77007319 | 61 | } |
mbed_official | 52:a51c77007319 | 62 | } |