Umar Naeem / mbed-dev

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Fork of mbed-dev by Umar Naeem

targets/hal/TARGET_NXP/TARGET_LPC2460/gpio_api.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2015 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 17 #include "gpio_api.h"
bogdanm 0:9b334a45a8ff 18 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 uint32_t gpio_set(PinName pin) {
bogdanm 0:9b334a45a8ff 21 LPC_SC->SCS |= 1; // High speed GPIO is enabled on ports 0 and 1
bogdanm 0:9b334a45a8ff 22
bogdanm 0:9b334a45a8ff 23 pin_function(pin, 0);
bogdanm 0:9b334a45a8ff 24
bogdanm 0:9b334a45a8ff 25 return (1 << ((int)pin & 0x1F));
bogdanm 0:9b334a45a8ff 26 }
bogdanm 0:9b334a45a8ff 27
bogdanm 0:9b334a45a8ff 28 void gpio_init(gpio_t *obj, PinName pin) {
bogdanm 0:9b334a45a8ff 29 if (pin == (PinName)NC)
bogdanm 0:9b334a45a8ff 30 return;
bogdanm 0:9b334a45a8ff 31 obj->pin = pin;
bogdanm 0:9b334a45a8ff 32 if (pin == (PinName)NC)
bogdanm 0:9b334a45a8ff 33 return;
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 obj->mask = gpio_set(pin);
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 LPC_GPIO_TypeDef *port_reg = (LPC_GPIO_TypeDef *) ((int)pin & ~0x1F);
bogdanm 0:9b334a45a8ff 38
bogdanm 0:9b334a45a8ff 39 obj->reg_set = &port_reg->FIOSET;
bogdanm 0:9b334a45a8ff 40 obj->reg_mask = &port_reg->FIOMASK;
bogdanm 0:9b334a45a8ff 41 obj->reg_clr = &port_reg->FIOCLR;
bogdanm 0:9b334a45a8ff 42 obj->reg_in = &port_reg->FIOPIN;
bogdanm 0:9b334a45a8ff 43 obj->reg_dir = &port_reg->FIODIR;
bogdanm 0:9b334a45a8ff 44 }
bogdanm 0:9b334a45a8ff 45
bogdanm 0:9b334a45a8ff 46 void gpio_mode(gpio_t *obj, PinMode mode) {
bogdanm 0:9b334a45a8ff 47 pin_mode(obj->pin, mode);
bogdanm 0:9b334a45a8ff 48 }
bogdanm 0:9b334a45a8ff 49
bogdanm 0:9b334a45a8ff 50 void gpio_dir(gpio_t *obj, PinDirection direction) {
bogdanm 0:9b334a45a8ff 51 if (obj->pin == (PinName)NC)
bogdanm 0:9b334a45a8ff 52 return;
bogdanm 0:9b334a45a8ff 53 switch (direction) {
bogdanm 0:9b334a45a8ff 54 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
bogdanm 0:9b334a45a8ff 55 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
bogdanm 0:9b334a45a8ff 56 }
bogdanm 0:9b334a45a8ff 57 }