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targets/hal/TARGET_NXP/TARGET_LPC43XX/gpio_api.c@20:4263a77256ae, 2013-09-10 (annotated)

Committer:
bogdanm
Date:
Tue Sep 10 15:14:19 2013 +0300
Revision:
20:4263a77256ae
Child:
113:65a335a675de
Sync with git revision 171dda705c947bf910926a0b73d6a4797802554d

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 20:4263a77256ae 1 /* mbed Microcontroller Library
bogdanm 20:4263a77256ae 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 20:4263a77256ae 3 *
bogdanm 20:4263a77256ae 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 20:4263a77256ae 5 * you may not use this file except in compliance with the License.
bogdanm 20:4263a77256ae 6 * You may obtain a copy of the License at
bogdanm 20:4263a77256ae 7 *
bogdanm 20:4263a77256ae 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 20:4263a77256ae 9 *
bogdanm 20:4263a77256ae 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 20:4263a77256ae 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 20:4263a77256ae 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 20:4263a77256ae 13 * See the License for the specific language governing permissions and
bogdanm 20:4263a77256ae 14 * limitations under the License.
bogdanm 20:4263a77256ae 15 *
bogdanm 20:4263a77256ae 16 * Ported to NXP LPC43XX by Micromint USA <support@micromint.com>
bogdanm 20:4263a77256ae 17 */
bogdanm 20:4263a77256ae 18 #include "gpio_api.h"
bogdanm 20:4263a77256ae 19 #include "pinmap.h"
bogdanm 20:4263a77256ae 20
bogdanm 20:4263a77256ae 21 uint32_t gpio_set(PinName pin) {
bogdanm 20:4263a77256ae 22 int f = 0;
bogdanm 20:4263a77256ae 23 unsigned int port = (unsigned int)MBED_GPIO_PORT(pin);
bogdanm 20:4263a77256ae 24
bogdanm 20:4263a77256ae 25 f = SCU_PINIO_FAST | ((port > 4) ? (4) : (0));
bogdanm 20:4263a77256ae 26 pin_function(pin, f);
bogdanm 20:4263a77256ae 27
bogdanm 20:4263a77256ae 28 return (1 << ((int)pin & 0x1F));
bogdanm 20:4263a77256ae 29 }
bogdanm 20:4263a77256ae 30
bogdanm 20:4263a77256ae 31 void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) {
bogdanm 20:4263a77256ae 32 if (pin == NC) return;
bogdanm 20:4263a77256ae 33
bogdanm 20:4263a77256ae 34 obj->pin = pin;
bogdanm 20:4263a77256ae 35 obj->mask = gpio_set(pin);
bogdanm 20:4263a77256ae 36
bogdanm 20:4263a77256ae 37 LPC_GPIO_T *port_reg = (LPC_GPIO_T *) (LPC_GPIO_PORT_BASE);
bogdanm 20:4263a77256ae 38 unsigned int port = (unsigned int)MBED_GPIO_PORT(pin);
bogdanm 20:4263a77256ae 39
bogdanm 20:4263a77256ae 40 obj->reg_set = &port_reg->SET[port];
bogdanm 20:4263a77256ae 41 obj->reg_clr = &port_reg->CLR[port];
bogdanm 20:4263a77256ae 42 obj->reg_in = &port_reg->PIN[port];
bogdanm 20:4263a77256ae 43 obj->reg_dir = &port_reg->DIR[port];
bogdanm 20:4263a77256ae 44
bogdanm 20:4263a77256ae 45 gpio_dir(obj, direction);
bogdanm 20:4263a77256ae 46 switch (direction) {
bogdanm 20:4263a77256ae 47 case PIN_OUTPUT: pin_mode(pin, PullNone); break;
bogdanm 20:4263a77256ae 48 case PIN_INPUT : pin_mode(pin, PullDown); break;
bogdanm 20:4263a77256ae 49 }
bogdanm 20:4263a77256ae 50 }
bogdanm 20:4263a77256ae 51
bogdanm 20:4263a77256ae 52 void gpio_mode(gpio_t *obj, PinMode mode) {
bogdanm 20:4263a77256ae 53 pin_mode(obj->pin, mode);
bogdanm 20:4263a77256ae 54 }
bogdanm 20:4263a77256ae 55
bogdanm 20:4263a77256ae 56 void gpio_dir(gpio_t *obj, PinDirection direction) {
bogdanm 20:4263a77256ae 57 switch (direction) {
bogdanm 20:4263a77256ae 58 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
bogdanm 20:4263a77256ae 59 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
bogdanm 20:4263a77256ae 60 }
bogdanm 20:4263a77256ae 61 }