mbed library sources. Supersedes mbed-src.
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targets/TARGET_Atmel/TARGET_SAM_CortexM0P/gpio_api.c
- Committer:
- fwndz
- Date:
- 2016-12-22
- Revision:
- 153:9398a535854b
- Parent:
- 149:156823d33999
File content as of revision 153:9398a535854b:
/* mbed Microcontroller Library * Copyright (c) 2006-2015 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 "PinNames.h" #include "gpio_object.h" #include "gpio_api.h" #include "compiler.h" #include "port.h" uint32_t gpio_set(PinName pin) { MBED_ASSERT(pin != (PinName)NC); return (1UL << (pin % 32)); } void gpio_init(gpio_t *obj, PinName pin) { MBED_ASSERT(pin != (PinName)NC); struct port_config pin_conf; PortGroup *const port_base = (PortGroup*)port_get_group_from_gpio_pin(pin); obj->pin = pin; if (pin == (PinName)NC) return; obj->mask = gpio_set(pin); port_get_config_defaults(&pin_conf); obj->powersave = pin_conf.powersave; obj->direction = PORT_PIN_DIR_INPUT; obj->mode = PORT_PIN_PULL_UP; port_pin_set_config(pin, &pin_conf); obj->OUTCLR = &port_base->OUTCLR.reg; obj->OUTSET = &port_base->OUTSET.reg; obj->IN = &port_base->IN.reg; obj->OUT = &port_base->OUT.reg; } void gpio_mode(gpio_t *obj, PinMode mode) { MBED_ASSERT(obj->pin != (PinName)NC); struct port_config pin_conf; obj->mode = mode; pin_conf.direction = (enum port_pin_dir)obj->direction; pin_conf.powersave = obj->powersave; switch (mode) { case PullNone : pin_conf.input_pull = PORT_PIN_PULL_NONE; break; case PullUp: pin_conf.input_pull = PORT_PIN_PULL_UP; break; case PullDown: pin_conf.input_pull = PORT_PIN_PULL_DOWN; break; } port_pin_set_config(obj->pin, &pin_conf); } void gpio_dir(gpio_t *obj, PinDirection direction) { MBED_ASSERT(obj->pin != (PinName)NC); struct port_config pin_conf; obj->direction = direction; pin_conf.input_pull = (enum port_pin_pull)obj->mode; pin_conf.powersave = obj->powersave; switch (direction) { case PIN_INPUT : pin_conf.direction = PORT_PIN_DIR_INPUT; break; case PIN_OUTPUT: pin_conf.direction = PORT_PIN_DIR_OUTPUT; break; case PIN_INPUT_OUTPUT: pin_conf.direction = PORT_PIN_DIR_OUTPUT_WTH_READBACK; break; } port_pin_set_config(obj->pin, &pin_conf); }