mbed official / mbed-src

mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_NXP/TARGET_LPC81X/gpio_api.c@13:0645d8841f51, 2013-08-05 (annotated)

Committer:
bogdanm
Date:
Mon Aug 05 14:12:34 2013 +0300
Revision:
13:0645d8841f51
Parent:
vendor/NXP/LPC812/hal/gpio_api.c@10:3bc89ef62ce7 
Update mbed sources to revision 64

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 */
emilmont 10:3bc89ef62ce7 16 #include "gpio_api.h"
emilmont 10:3bc89ef62ce7 17 #include "pinmap.h"
emilmont 10:3bc89ef62ce7 18
emilmont 10:3bc89ef62ce7 19 static int gpio_enabled = 0;
emilmont 10:3bc89ef62ce7 20 static void gpio_enable(void) {
emilmont 10:3bc89ef62ce7 21 gpio_enabled = 1;
emilmont 10:3bc89ef62ce7 22
emilmont 10:3bc89ef62ce7 23 /* Enable AHB clock to the GPIO domain. */
emilmont 10:3bc89ef62ce7 24 LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
emilmont 10:3bc89ef62ce7 25
emilmont 10:3bc89ef62ce7 26 /* Peripheral reset control to GPIO and GPIO INT, a "1" bring it out of reset. */
emilmont 10:3bc89ef62ce7 27 LPC_SYSCON->PRESETCTRL &= ~(0x1<<10);
emilmont 10:3bc89ef62ce7 28 LPC_SYSCON->PRESETCTRL |= (0x1<<10);
emilmont 10:3bc89ef62ce7 29 }
emilmont 10:3bc89ef62ce7 30
emilmont 10:3bc89ef62ce7 31 uint32_t gpio_set(PinName pin) {
emilmont 10:3bc89ef62ce7 32 int f = 0;
emilmont 10:3bc89ef62ce7 33
emilmont 10:3bc89ef62ce7 34 if (!gpio_enabled)
emilmont 10:3bc89ef62ce7 35 gpio_enable();
emilmont 10:3bc89ef62ce7 36
emilmont 10:3bc89ef62ce7 37 pin_function(pin, f);
emilmont 10:3bc89ef62ce7 38
emilmont 10:3bc89ef62ce7 39 return (1 << ((int)pin & 0x1F));
emilmont 10:3bc89ef62ce7 40 }
emilmont 10:3bc89ef62ce7 41
emilmont 10:3bc89ef62ce7 42 void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) {
emilmont 10:3bc89ef62ce7 43 if(pin == NC) return;
emilmont 10:3bc89ef62ce7 44
emilmont 10:3bc89ef62ce7 45 obj->pin = pin;
emilmont 10:3bc89ef62ce7 46 obj->mask = gpio_set(pin);
emilmont 10:3bc89ef62ce7 47
emilmont 10:3bc89ef62ce7 48 obj->reg_set = &LPC_GPIO_PORT->SET0;
emilmont 10:3bc89ef62ce7 49 obj->reg_clr = &LPC_GPIO_PORT->CLR0;
emilmont 10:3bc89ef62ce7 50 obj->reg_in = &LPC_GPIO_PORT->PIN0;
emilmont 10:3bc89ef62ce7 51 obj->reg_dir = &LPC_GPIO_PORT->DIR0;
emilmont 10:3bc89ef62ce7 52
emilmont 10:3bc89ef62ce7 53 gpio_dir(obj, direction);
emilmont 10:3bc89ef62ce7 54 switch (direction) {
emilmont 10:3bc89ef62ce7 55 case PIN_OUTPUT: pin_mode(pin, PullNone); break;
emilmont 10:3bc89ef62ce7 56 case PIN_INPUT : pin_mode(pin, PullDown); break;
emilmont 10:3bc89ef62ce7 57 }
emilmont 10:3bc89ef62ce7 58 }
emilmont 10:3bc89ef62ce7 59
emilmont 10:3bc89ef62ce7 60 void gpio_mode(gpio_t *obj, PinMode mode) {
emilmont 10:3bc89ef62ce7 61 pin_mode(obj->pin, mode);
emilmont 10:3bc89ef62ce7 62 }
emilmont 10:3bc89ef62ce7 63
emilmont 10:3bc89ef62ce7 64 void gpio_dir(gpio_t *obj, PinDirection direction) {
emilmont 10:3bc89ef62ce7 65 switch (direction) {
emilmont 10:3bc89ef62ce7 66 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
emilmont 10:3bc89ef62ce7 67 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
emilmont 10:3bc89ef62ce7 68 }
emilmont 10:3bc89ef62ce7 69 }