Fawwaz Nadzmy / mbed-STM

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/TARGET_Atmel/TARGET_SAM_CortexM0P/gpio_api.c@153:9398a535854b, 2016-12-22 (annotated)

Committer:
fwndz
Date:
Thu Dec 22 05:12:40 2016 +0000
Revision:
153:9398a535854b
Parent:
149:156823d33999 
device target maximize

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 15:a81a8d6c1dfe 1 /* mbed Microcontroller Library
mbed_official 15:a81a8d6c1dfe 2 * Copyright (c) 2006-2015 ARM Limited
mbed_official 15:a81a8d6c1dfe 3 *
mbed_official 15:a81a8d6c1dfe 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 15:a81a8d6c1dfe 5 * you may not use this file except in compliance with the License.
mbed_official 15:a81a8d6c1dfe 6 * You may obtain a copy of the License at
mbed_official 15:a81a8d6c1dfe 7 *
mbed_official 15:a81a8d6c1dfe 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 15:a81a8d6c1dfe 9 *
mbed_official 15:a81a8d6c1dfe 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 15:a81a8d6c1dfe 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 15:a81a8d6c1dfe 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 15:a81a8d6c1dfe 13 * See the License for the specific language governing permissions and
mbed_official 15:a81a8d6c1dfe 14 * limitations under the License.
mbed_official 15:a81a8d6c1dfe 15 */
mbed_official 15:a81a8d6c1dfe 16 #include "mbed_assert.h"
mbed_official 15:a81a8d6c1dfe 17 #include "PinNames.h"
mbed_official 15:a81a8d6c1dfe 18 #include "gpio_object.h"
mbed_official 15:a81a8d6c1dfe 19 #include "gpio_api.h"
mbed_official 15:a81a8d6c1dfe 20 #include "compiler.h"
mbed_official 15:a81a8d6c1dfe 21 #include "port.h"
mbed_official 15:a81a8d6c1dfe 22
mbed_official 15:a81a8d6c1dfe 23 uint32_t gpio_set(PinName pin)
mbed_official 15:a81a8d6c1dfe 24 {
mbed_official 15:a81a8d6c1dfe 25 MBED_ASSERT(pin != (PinName)NC);
mbed_official 15:a81a8d6c1dfe 26 return (1UL << (pin % 32));
mbed_official 15:a81a8d6c1dfe 27 }
mbed_official 15:a81a8d6c1dfe 28
mbed_official 15:a81a8d6c1dfe 29 void gpio_init(gpio_t *obj, PinName pin)
mbed_official 15:a81a8d6c1dfe 30 {
mbed_official 15:a81a8d6c1dfe 31 MBED_ASSERT(pin != (PinName)NC);
mbed_official 15:a81a8d6c1dfe 32 struct port_config pin_conf;
mbed_official 15:a81a8d6c1dfe 33 PortGroup *const port_base = (PortGroup*)port_get_group_from_gpio_pin(pin);
mbed_official 15:a81a8d6c1dfe 34
mbed_official 15:a81a8d6c1dfe 35 obj->pin = pin;
mbed_official 15:a81a8d6c1dfe 36 if (pin == (PinName)NC)
mbed_official 15:a81a8d6c1dfe 37 return;
mbed_official 15:a81a8d6c1dfe 38
mbed_official 15:a81a8d6c1dfe 39 obj->mask = gpio_set(pin);
mbed_official 15:a81a8d6c1dfe 40 port_get_config_defaults(&pin_conf);
mbed_official 15:a81a8d6c1dfe 41 obj->powersave = pin_conf.powersave;
mbed_official 15:a81a8d6c1dfe 42 obj->direction = PORT_PIN_DIR_INPUT;
mbed_official 15:a81a8d6c1dfe 43 obj->mode = PORT_PIN_PULL_UP;
mbed_official 15:a81a8d6c1dfe 44 port_pin_set_config(pin, &pin_conf);
mbed_official 15:a81a8d6c1dfe 45
mbed_official 15:a81a8d6c1dfe 46 obj->OUTCLR = &port_base->OUTCLR.reg;
mbed_official 15:a81a8d6c1dfe 47 obj->OUTSET = &port_base->OUTSET.reg;
mbed_official 15:a81a8d6c1dfe 48 obj->IN = &port_base->IN.reg;
mbed_official 15:a81a8d6c1dfe 49 obj->OUT = &port_base->OUT.reg;
mbed_official 15:a81a8d6c1dfe 50 }
mbed_official 15:a81a8d6c1dfe 51
mbed_official 15:a81a8d6c1dfe 52 void gpio_mode(gpio_t *obj, PinMode mode)
mbed_official 15:a81a8d6c1dfe 53 {
mbed_official 15:a81a8d6c1dfe 54 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 15:a81a8d6c1dfe 55 struct port_config pin_conf;
mbed_official 15:a81a8d6c1dfe 56
mbed_official 15:a81a8d6c1dfe 57 obj->mode = mode;
mbed_official 64:41a834223ea3 58 pin_conf.direction = (enum port_pin_dir)obj->direction;
mbed_official 15:a81a8d6c1dfe 59 pin_conf.powersave = obj->powersave;
mbed_official 15:a81a8d6c1dfe 60 switch (mode) {
mbed_official 15:a81a8d6c1dfe 61 case PullNone :
mbed_official 15:a81a8d6c1dfe 62 pin_conf.input_pull = PORT_PIN_PULL_NONE;
mbed_official 15:a81a8d6c1dfe 63 break;
mbed_official 15:a81a8d6c1dfe 64 case PullUp:
mbed_official 15:a81a8d6c1dfe 65 pin_conf.input_pull = PORT_PIN_PULL_UP;
mbed_official 15:a81a8d6c1dfe 66 break;
mbed_official 15:a81a8d6c1dfe 67 case PullDown:
mbed_official 15:a81a8d6c1dfe 68 pin_conf.input_pull = PORT_PIN_PULL_DOWN;
mbed_official 15:a81a8d6c1dfe 69 break;
mbed_official 15:a81a8d6c1dfe 70 }
mbed_official 15:a81a8d6c1dfe 71 port_pin_set_config(obj->pin, &pin_conf);
mbed_official 15:a81a8d6c1dfe 72 }
mbed_official 15:a81a8d6c1dfe 73
mbed_official 15:a81a8d6c1dfe 74 void gpio_dir(gpio_t *obj, PinDirection direction)
mbed_official 15:a81a8d6c1dfe 75 {
mbed_official 15:a81a8d6c1dfe 76 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 15:a81a8d6c1dfe 77 struct port_config pin_conf;
mbed_official 15:a81a8d6c1dfe 78 obj->direction = direction;
mbed_official 64:41a834223ea3 79 pin_conf.input_pull = (enum port_pin_pull)obj->mode;
mbed_official 15:a81a8d6c1dfe 80 pin_conf.powersave = obj->powersave;
mbed_official 15:a81a8d6c1dfe 81 switch (direction) {
mbed_official 15:a81a8d6c1dfe 82 case PIN_INPUT :
mbed_official 15:a81a8d6c1dfe 83 pin_conf.direction = PORT_PIN_DIR_INPUT;
mbed_official 15:a81a8d6c1dfe 84 break;
mbed_official 15:a81a8d6c1dfe 85 case PIN_OUTPUT:
mbed_official 15:a81a8d6c1dfe 86 pin_conf.direction = PORT_PIN_DIR_OUTPUT;
mbed_official 15:a81a8d6c1dfe 87 break;
mbed_official 15:a81a8d6c1dfe 88 case PIN_INPUT_OUTPUT:
mbed_official 15:a81a8d6c1dfe 89 pin_conf.direction = PORT_PIN_DIR_OUTPUT_WTH_READBACK;
mbed_official 15:a81a8d6c1dfe 90 break;
mbed_official 15:a81a8d6c1dfe 91 }
mbed_official 15:a81a8d6c1dfe 92 port_pin_set_config(obj->pin, &pin_conf);
mbed_official 15:a81a8d6c1dfe 93 }