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_LPC23XX/gpio_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
227:7bd0639b8911 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 10:3bc89ef62ce7 1 /* mbed Microcontroller Library
emilmont 10:3bc89ef62ce7 2 * Copyright (c) 2006-2013 ARM Limited
emilmont 10:3bc89ef62ce7 3 *
emilmont 10:3bc89ef62ce7 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 10:3bc89ef62ce7 5 * you may not use this file except in compliance with the License.
emilmont 10:3bc89ef62ce7 6 * You may obtain a copy of the License at
emilmont 10:3bc89ef62ce7 7 *
emilmont 10:3bc89ef62ce7 8 * http://www.apache.org/licenses/LICENSE-2.0
emilmont 10:3bc89ef62ce7 9 *
emilmont 10:3bc89ef62ce7 10 * Unless required by applicable law or agreed to in writing, software
emilmont 10:3bc89ef62ce7 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 10:3bc89ef62ce7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 10:3bc89ef62ce7 13 * See the License for the specific language governing permissions and
emilmont 10:3bc89ef62ce7 14 * limitations under the License.
emilmont 10:3bc89ef62ce7 15 */
mbed_official 227:7bd0639b8911 16 #include "mbed_assert.h"
emilmont 10:3bc89ef62ce7 17 #include "gpio_api.h"
emilmont 10:3bc89ef62ce7 18 #include "pinmap.h"
emilmont 10:3bc89ef62ce7 19
emilmont 10:3bc89ef62ce7 20 uint32_t gpio_set(PinName pin) {
emilmont 10:3bc89ef62ce7 21 LPC_SC->SCS |= 1; // High speed GPIO is enabled on ports 0 and 1
emilmont 10:3bc89ef62ce7 22
emilmont 10:3bc89ef62ce7 23 pin_function(pin, 0);
emilmont 10:3bc89ef62ce7 24
emilmont 10:3bc89ef62ce7 25 return (1 << ((int)pin & 0x1F));
emilmont 10:3bc89ef62ce7 26 }
emilmont 10:3bc89ef62ce7 27
mbed_official 113:65a335a675de 28 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 227:7bd0639b8911 29 if (pin == (PinName)NC)
mbed_official 227:7bd0639b8911 30 return;
emilmont 10:3bc89ef62ce7 31 obj->pin = pin;
emilmont 10:3bc89ef62ce7 32 obj->mask = gpio_set(pin);
emilmont 10:3bc89ef62ce7 33
emilmont 10:3bc89ef62ce7 34 LPC_GPIO_TypeDef *port_reg = (LPC_GPIO_TypeDef *) ((int)pin & ~0x1F);
emilmont 10:3bc89ef62ce7 35
emilmont 10:3bc89ef62ce7 36 obj->reg_set = &port_reg->FIOSET;
emilmont 10:3bc89ef62ce7 37 obj->reg_clr = &port_reg->FIOCLR;
emilmont 10:3bc89ef62ce7 38 obj->reg_in = &port_reg->FIOPIN;
emilmont 10:3bc89ef62ce7 39 obj->reg_dir = &port_reg->FIODIR;
emilmont 10:3bc89ef62ce7 40 }
emilmont 10:3bc89ef62ce7 41
emilmont 10:3bc89ef62ce7 42 void gpio_mode(gpio_t *obj, PinMode mode) {
emilmont 10:3bc89ef62ce7 43 pin_mode(obj->pin, mode);
emilmont 10:3bc89ef62ce7 44 }
emilmont 10:3bc89ef62ce7 45
emilmont 10:3bc89ef62ce7 46 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 227:7bd0639b8911 47 if (obj->pin == (PinName)NC)
mbed_official 227:7bd0639b8911 48 return;
emilmont 10:3bc89ef62ce7 49 switch (direction) {
emilmont 10:3bc89ef62ce7 50 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
emilmont 10:3bc89ef62ce7 51 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
emilmont 10:3bc89ef62ce7 52 }
emilmont 10:3bc89ef62ce7 53 }