Umar Naeem / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by Umar Naeem

targets/TARGET_NXP/TARGET_LPC23XX/gpio_api.c@165:2dd56e6daeec, 2017-05-23 (annotated)

Committer:
ranaumarnaeem
Date:
Tue May 23 12:54:50 2017 +0000
Revision:
165:2dd56e6daeec
Parent:
149:156823d33999 
jhjg

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 17 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 18 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 uint32_t gpio_set(PinName pin) {
<> 144:ef7eb2e8f9f7 21 LPC_SC->SCS |= 1; // High speed GPIO is enabled on ports 0 and 1
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 pin_function(pin, 0);
<> 144:ef7eb2e8f9f7 24
<> 144:ef7eb2e8f9f7 25 return (1 << ((int)pin & 0x1F));
<> 144:ef7eb2e8f9f7 26 }
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 void gpio_init(gpio_t *obj, PinName pin) {
<> 144:ef7eb2e8f9f7 29 if (pin == (PinName)NC)
<> 144:ef7eb2e8f9f7 30 return;
<> 144:ef7eb2e8f9f7 31 obj->pin = pin;
<> 144:ef7eb2e8f9f7 32 obj->mask = gpio_set(pin);
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 LPC_GPIO_TypeDef *port_reg = (LPC_GPIO_TypeDef *) ((int)pin & ~0x1F);
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 obj->reg_set = &port_reg->FIOSET;
<> 144:ef7eb2e8f9f7 37 obj->reg_clr = &port_reg->FIOCLR;
<> 144:ef7eb2e8f9f7 38 obj->reg_in = &port_reg->FIOPIN;
<> 144:ef7eb2e8f9f7 39 obj->reg_dir = &port_reg->FIODIR;
<> 144:ef7eb2e8f9f7 40 }
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42 void gpio_mode(gpio_t *obj, PinMode mode) {
<> 144:ef7eb2e8f9f7 43 pin_mode(obj->pin, mode);
<> 144:ef7eb2e8f9f7 44 }
<> 144:ef7eb2e8f9f7 45
<> 144:ef7eb2e8f9f7 46 void gpio_dir(gpio_t *obj, PinDirection direction) {
<> 144:ef7eb2e8f9f7 47 if (obj->pin == (PinName)NC)
<> 144:ef7eb2e8f9f7 48 return;
<> 144:ef7eb2e8f9f7 49 switch (direction) {
<> 144:ef7eb2e8f9f7 50 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
<> 144:ef7eb2e8f9f7 51 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
<> 144:ef7eb2e8f9f7 52 }
<> 144:ef7eb2e8f9f7 53 }