teralytic / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed by teralytic

targets/hal/TARGET_Atmel/TARGET_SAM_CortexM4/gpio_api.c@148:4802eb17e82b, 2016-10-17 (annotated)

Committer:
rodriguise
Date:
Mon Oct 17 18:47:01 2016 +0000
Revision:
148:4802eb17e82b
Parent:
107:414e9c822e99 
backup

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 107:414e9c822e99 1 /* mbed Microcontroller Library
mbed_official 107:414e9c822e99 2 * Copyright (c) 2006-2015 ARM Limited
mbed_official 107:414e9c822e99 3 *
mbed_official 107:414e9c822e99 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 107:414e9c822e99 5 * you may not use this file except in compliance with the License.
mbed_official 107:414e9c822e99 6 * You may obtain a copy of the License at
mbed_official 107:414e9c822e99 7 *
mbed_official 107:414e9c822e99 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 107:414e9c822e99 9 *
mbed_official 107:414e9c822e99 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 107:414e9c822e99 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 107:414e9c822e99 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 107:414e9c822e99 13 * See the License for the specific language governing permissions and
mbed_official 107:414e9c822e99 14 * limitations under the License.
mbed_official 107:414e9c822e99 15 */
mbed_official 107:414e9c822e99 16 #include "mbed_assert.h"
mbed_official 107:414e9c822e99 17 #include "PinNames.h"
mbed_official 107:414e9c822e99 18 #include "gpio_object.h"
mbed_official 107:414e9c822e99 19 #include "gpio_api.h"
mbed_official 107:414e9c822e99 20 #include "compiler.h"
mbed_official 107:414e9c822e99 21 #include "ioport.h"
mbed_official 107:414e9c822e99 22
mbed_official 107:414e9c822e99 23 extern uint8_t g_sys_init;
mbed_official 107:414e9c822e99 24
mbed_official 107:414e9c822e99 25 uint32_t gpio_set(PinName pin)
mbed_official 107:414e9c822e99 26 {
mbed_official 107:414e9c822e99 27 MBED_ASSERT(pin != (PinName)NC);
mbed_official 107:414e9c822e99 28 return (1UL << (pin % 32));
mbed_official 107:414e9c822e99 29 }
mbed_official 107:414e9c822e99 30
mbed_official 107:414e9c822e99 31 void gpio_init(gpio_t *obj, PinName pin)
mbed_official 107:414e9c822e99 32 {
mbed_official 107:414e9c822e99 33 MBED_ASSERT(pin != (PinName)NC);
mbed_official 107:414e9c822e99 34 if (g_sys_init == 0) {
mbed_official 107:414e9c822e99 35 sysclk_init();
mbed_official 107:414e9c822e99 36 system_board_init();
mbed_official 107:414e9c822e99 37 g_sys_init = 1;
mbed_official 107:414e9c822e99 38 }
mbed_official 107:414e9c822e99 39 obj->pin = pin;
mbed_official 107:414e9c822e99 40
mbed_official 107:414e9c822e99 41 ioport_set_pin_dir(pin, IOPORT_DIR_INPUT);
mbed_official 107:414e9c822e99 42 ioport_set_pin_mode(pin, IOPORT_MODE_PULLUP);
mbed_official 107:414e9c822e99 43 }
mbed_official 107:414e9c822e99 44
mbed_official 107:414e9c822e99 45 void gpio_mode(gpio_t *obj, PinMode mode)
mbed_official 107:414e9c822e99 46 {
mbed_official 107:414e9c822e99 47 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 107:414e9c822e99 48 obj->mode = mode;
mbed_official 107:414e9c822e99 49 switch (mode) {
mbed_official 107:414e9c822e99 50 case PullNone :
mbed_official 107:414e9c822e99 51 ioport_set_pin_mode(obj->pin, IOPORT_MODE_OPEN_DRAIN);
mbed_official 107:414e9c822e99 52 break;
mbed_official 107:414e9c822e99 53 case PullUp:
mbed_official 107:414e9c822e99 54 ioport_set_pin_mode(obj->pin, IOPORT_MODE_PULLUP);
mbed_official 107:414e9c822e99 55 break;
mbed_official 107:414e9c822e99 56 case PullDown:
mbed_official 107:414e9c822e99 57 ioport_set_pin_mode(obj->pin, IOPORT_MODE_PULLDOWN);
mbed_official 107:414e9c822e99 58 break;
mbed_official 107:414e9c822e99 59 }
mbed_official 107:414e9c822e99 60 }
mbed_official 107:414e9c822e99 61
mbed_official 107:414e9c822e99 62 void gpio_dir(gpio_t *obj, PinDirection direction)
mbed_official 107:414e9c822e99 63 {
mbed_official 107:414e9c822e99 64 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 107:414e9c822e99 65 obj->direction = direction;
mbed_official 107:414e9c822e99 66 switch (direction) {
mbed_official 107:414e9c822e99 67 case PIN_INPUT :
mbed_official 107:414e9c822e99 68 ioport_set_pin_dir(obj->pin, IOPORT_DIR_INPUT);
mbed_official 107:414e9c822e99 69 break;
mbed_official 107:414e9c822e99 70 case PIN_OUTPUT:
mbed_official 107:414e9c822e99 71 ioport_set_pin_dir(obj->pin, IOPORT_DIR_OUTPUT);
mbed_official 107:414e9c822e99 72 break;
mbed_official 107:414e9c822e99 73 case PIN_INPUT_OUTPUT:
mbed_official 107:414e9c822e99 74 ioport_set_pin_dir(obj->pin, IOPORT_DIR_OUTPUT);
mbed_official 107:414e9c822e99 75 break;
mbed_official 107:414e9c822e99 76 }
mbed_official 107:414e9c822e99 77 }