shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC15XX/gpio_api.c@113:65a335a675de, 2014-03-10 (annotated)

Committer:
mbed_official
Date:
Mon Mar 10 11:30:07 2014 +0000
Revision:
113:65a335a675de
Parent:
103:9b881da47c92
Child:
227:7bd0639b8911
Synchronized with git revision 423ddcb86e83e2e0d599ca7106d436eb3c47e6dd



Full URL: https://github.com/mbedmicro/mbed/commit/423ddcb86e83e2e0d599ca7106d436eb3c47e6dd/



proposed change of gpio_api (new update pull request)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 103:9b881da47c92 1 /* mbed Microcontroller Library
mbed_official 103:9b881da47c92 2 * Copyright (c) 2006-2014 ARM Limited
mbed_official 103:9b881da47c92 3 *
mbed_official 103:9b881da47c92 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 103:9b881da47c92 5 * you may not use this file except in compliance with the License.
mbed_official 103:9b881da47c92 6 * You may obtain a copy of the License at
mbed_official 103:9b881da47c92 7 *
mbed_official 103:9b881da47c92 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 103:9b881da47c92 9 *
mbed_official 103:9b881da47c92 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 103:9b881da47c92 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 103:9b881da47c92 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 103:9b881da47c92 13 * See the License for the specific language governing permissions and
mbed_official 103:9b881da47c92 14 * limitations under the License.
mbed_official 103:9b881da47c92 15 */
mbed_official 103:9b881da47c92 16 #include "gpio_api.h"
mbed_official 103:9b881da47c92 17 #include "pinmap.h"
mbed_official 103:9b881da47c92 18
mbed_official 103:9b881da47c92 19 static int gpio_enabled = 0;
mbed_official 103:9b881da47c92 20
mbed_official 103:9b881da47c92 21 static void gpio_enable(void) {
mbed_official 103:9b881da47c92 22 gpio_enabled = 1;
mbed_official 103:9b881da47c92 23
mbed_official 103:9b881da47c92 24 /* Enable AHB clock to the GPIO0/1/2 and IOCON domain. */
mbed_official 103:9b881da47c92 25 LPC_SYSCON->SYSAHBCLKCTRL0 |= (0xFUL << 13);
mbed_official 103:9b881da47c92 26 }
mbed_official 103:9b881da47c92 27
mbed_official 103:9b881da47c92 28 uint32_t gpio_set(PinName pin) {
mbed_official 103:9b881da47c92 29
mbed_official 103:9b881da47c92 30 if (!gpio_enabled)
mbed_official 103:9b881da47c92 31 gpio_enable();
mbed_official 103:9b881da47c92 32
mbed_official 103:9b881da47c92 33 return (1UL << ((int)pin & 0x1f));
mbed_official 103:9b881da47c92 34 }
mbed_official 103:9b881da47c92 35
mbed_official 113:65a335a675de 36 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 103:9b881da47c92 37 if(pin == NC) return;
mbed_official 103:9b881da47c92 38
mbed_official 103:9b881da47c92 39 obj->pin = pin;
mbed_official 103:9b881da47c92 40 obj->mask = gpio_set(pin);
mbed_official 103:9b881da47c92 41
mbed_official 103:9b881da47c92 42 unsigned int port = (unsigned int)(pin >> 5);
mbed_official 103:9b881da47c92 43
mbed_official 103:9b881da47c92 44 obj->reg_set = &LPC_GPIO_PORT->SET[port];
mbed_official 103:9b881da47c92 45 obj->reg_clr = &LPC_GPIO_PORT->CLR[port];
mbed_official 103:9b881da47c92 46 obj->reg_in = &LPC_GPIO_PORT->PIN[port];
mbed_official 103:9b881da47c92 47 obj->reg_dir = &LPC_GPIO_PORT->DIR[port];
mbed_official 103:9b881da47c92 48 }
mbed_official 103:9b881da47c92 49
mbed_official 103:9b881da47c92 50 void gpio_mode(gpio_t *obj, PinMode mode) {
mbed_official 103:9b881da47c92 51 pin_mode(obj->pin, mode);
mbed_official 103:9b881da47c92 52 }
mbed_official 103:9b881da47c92 53
mbed_official 103:9b881da47c92 54 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 103:9b881da47c92 55 switch (direction) {
mbed_official 103:9b881da47c92 56 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
mbed_official 103:9b881da47c92 57 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
mbed_official 103:9b881da47c92 58 }
mbed_official 103:9b881da47c92 59 }