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_LPC81X/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:
46:bebbbd80dd87
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 46:bebbbd80dd87 1 /* mbed Microcontroller Library
mbed_official 46:bebbbd80dd87 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 46:bebbbd80dd87 3 *
mbed_official 46:bebbbd80dd87 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 46:bebbbd80dd87 5 * you may not use this file except in compliance with the License.
mbed_official 46:bebbbd80dd87 6 * You may obtain a copy of the License at
mbed_official 46:bebbbd80dd87 7 *
mbed_official 46:bebbbd80dd87 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 46:bebbbd80dd87 9 *
mbed_official 46:bebbbd80dd87 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 46:bebbbd80dd87 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 46:bebbbd80dd87 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 46:bebbbd80dd87 13 * See the License for the specific language governing permissions and
mbed_official 46:bebbbd80dd87 14 * limitations under the License.
mbed_official 46:bebbbd80dd87 15 */
mbed_official 46:bebbbd80dd87 16 #include "gpio_api.h"
mbed_official 46:bebbbd80dd87 17 #include "pinmap.h"
mbed_official 46:bebbbd80dd87 18
mbed_official 46:bebbbd80dd87 19 static int gpio_enabled = 0;
mbed_official 46:bebbbd80dd87 20 static void gpio_enable(void) {
mbed_official 46:bebbbd80dd87 21 gpio_enabled = 1;
mbed_official 46:bebbbd80dd87 22
mbed_official 46:bebbbd80dd87 23 /* Enable AHB clock to the GPIO domain. */
mbed_official 46:bebbbd80dd87 24 LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
mbed_official 46:bebbbd80dd87 25
mbed_official 46:bebbbd80dd87 26 /* Peripheral reset control to GPIO and GPIO INT, a "1" bring it out of reset. */
mbed_official 46:bebbbd80dd87 27 LPC_SYSCON->PRESETCTRL &= ~(0x1<<10);
mbed_official 46:bebbbd80dd87 28 LPC_SYSCON->PRESETCTRL |= (0x1<<10);
mbed_official 46:bebbbd80dd87 29 }
mbed_official 46:bebbbd80dd87 30
mbed_official 46:bebbbd80dd87 31 uint32_t gpio_set(PinName pin) {
mbed_official 46:bebbbd80dd87 32 int f = 0;
mbed_official 46:bebbbd80dd87 33
mbed_official 46:bebbbd80dd87 34 if (!gpio_enabled)
mbed_official 46:bebbbd80dd87 35 gpio_enable();
mbed_official 46:bebbbd80dd87 36
mbed_official 46:bebbbd80dd87 37 pin_function(pin, f);
mbed_official 46:bebbbd80dd87 38
mbed_official 46:bebbbd80dd87 39 return (1 << ((int)pin & 0x1F));
mbed_official 46:bebbbd80dd87 40 }
mbed_official 46:bebbbd80dd87 41
mbed_official 113:65a335a675de 42 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 46:bebbbd80dd87 43 if(pin == NC) return;
mbed_official 46:bebbbd80dd87 44
mbed_official 46:bebbbd80dd87 45 obj->pin = pin;
mbed_official 46:bebbbd80dd87 46 obj->mask = gpio_set(pin);
mbed_official 46:bebbbd80dd87 47
mbed_official 46:bebbbd80dd87 48 obj->reg_set = &LPC_GPIO_PORT->SET0;
mbed_official 46:bebbbd80dd87 49 obj->reg_clr = &LPC_GPIO_PORT->CLR0;
mbed_official 46:bebbbd80dd87 50 obj->reg_in = &LPC_GPIO_PORT->PIN0;
mbed_official 46:bebbbd80dd87 51 obj->reg_dir = &LPC_GPIO_PORT->DIR0;
mbed_official 46:bebbbd80dd87 52 }
mbed_official 46:bebbbd80dd87 53
mbed_official 46:bebbbd80dd87 54 void gpio_mode(gpio_t *obj, PinMode mode) {
mbed_official 46:bebbbd80dd87 55 pin_mode(obj->pin, mode);
mbed_official 46:bebbbd80dd87 56 }
mbed_official 46:bebbbd80dd87 57
mbed_official 46:bebbbd80dd87 58 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 46:bebbbd80dd87 59 switch (direction) {
mbed_official 46:bebbbd80dd87 60 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
mbed_official 46:bebbbd80dd87 61 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
mbed_official 46:bebbbd80dd87 62 }
mbed_official 46:bebbbd80dd87 63 }