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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_LPC11XX/gpio_api.c@19:398f4c622e1b, 2013-08-19 (annotated)

Committer:
bogdanm
Date:
Mon Aug 19 18:17:02 2013 +0300
Revision:
19:398f4c622e1b
Sync with official mbed library release 66

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 19:398f4c622e1b 1 /* mbed Microcontroller Library
bogdanm 19:398f4c622e1b 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 19:398f4c622e1b 3 *
bogdanm 19:398f4c622e1b 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 19:398f4c622e1b 5 * you may not use this file except in compliance with the License.
bogdanm 19:398f4c622e1b 6 * You may obtain a copy of the License at
bogdanm 19:398f4c622e1b 7 *
bogdanm 19:398f4c622e1b 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 19:398f4c622e1b 9 *
bogdanm 19:398f4c622e1b 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 19:398f4c622e1b 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 19:398f4c622e1b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 19:398f4c622e1b 13 * See the License for the specific language governing permissions and
bogdanm 19:398f4c622e1b 14 * limitations under the License.
bogdanm 19:398f4c622e1b 15 */
bogdanm 19:398f4c622e1b 16 #include "gpio_api.h"
bogdanm 19:398f4c622e1b 17 #include "pinmap.h"
bogdanm 19:398f4c622e1b 18
bogdanm 19:398f4c622e1b 19 uint32_t gpio_set(PinName pin) {
bogdanm 19:398f4c622e1b 20 // PIO default value of following ports are not same as others
bogdanm 19:398f4c622e1b 21 int f = ((pin == P0_0 ) || // RESET
bogdanm 19:398f4c622e1b 22 (pin == P0_11) || // R
bogdanm 19:398f4c622e1b 23 (pin == P1_0 ) || // R
bogdanm 19:398f4c622e1b 24 (pin == P1_1 ) || // R
bogdanm 19:398f4c622e1b 25 (pin == P1_2 )) ? // R
bogdanm 19:398f4c622e1b 26 (1) : (0);
bogdanm 19:398f4c622e1b 27
bogdanm 19:398f4c622e1b 28 pin_function(pin, f);
bogdanm 19:398f4c622e1b 29 return ((pin & 0x0F00) >> 8);
bogdanm 19:398f4c622e1b 30 }
bogdanm 19:398f4c622e1b 31
bogdanm 19:398f4c622e1b 32 void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) {
bogdanm 19:398f4c622e1b 33 if(pin == NC) return;
bogdanm 19:398f4c622e1b 34
bogdanm 19:398f4c622e1b 35 obj->pin = pin;
bogdanm 19:398f4c622e1b 36 LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (((pin & 0xF000) >> PORT_SHIFT) * 0x10000)));
bogdanm 19:398f4c622e1b 37
bogdanm 19:398f4c622e1b 38 obj->reg_mask_read = &port_reg->MASKED_ACCESS[1 << gpio_set(pin)];
bogdanm 19:398f4c622e1b 39 obj->reg_dir = &port_reg->DIR;
bogdanm 19:398f4c622e1b 40 obj->reg_write = &port_reg->DATA;
bogdanm 19:398f4c622e1b 41
bogdanm 19:398f4c622e1b 42 gpio_dir(obj, direction);
bogdanm 19:398f4c622e1b 43
bogdanm 19:398f4c622e1b 44 switch (direction) {
bogdanm 19:398f4c622e1b 45 case PIN_OUTPUT: pin_mode(pin, PullNone); break;
bogdanm 19:398f4c622e1b 46 case PIN_INPUT : pin_mode(pin, PullDown); break;
bogdanm 19:398f4c622e1b 47 }
bogdanm 19:398f4c622e1b 48 }
bogdanm 19:398f4c622e1b 49
bogdanm 19:398f4c622e1b 50 void gpio_mode(gpio_t *obj, PinMode mode) {
bogdanm 19:398f4c622e1b 51 pin_mode(obj->pin, mode);
bogdanm 19:398f4c622e1b 52 }
bogdanm 19:398f4c622e1b 53
bogdanm 19:398f4c622e1b 54 void gpio_dir(gpio_t *obj, PinDirection direction) {
bogdanm 19:398f4c622e1b 55 int pin_number = ((obj->pin & 0x0F00) >> 8);
bogdanm 19:398f4c622e1b 56 switch (direction) {
bogdanm 19:398f4c622e1b 57 case PIN_INPUT : *obj->reg_dir &= ~(1 << pin_number); break;
bogdanm 19:398f4c622e1b 58 case PIN_OUTPUT: *obj->reg_dir |= (1 << pin_number); break;
bogdanm 19:398f4c622e1b 59 }
bogdanm 19:398f4c622e1b 60 }