Mouse code for the MacroRat
mbed-dev/targets/TARGET_NXP/TARGET_LPC81X/gpio_api.c
- Committer:
- sahilmgandhi
- Date:
- 2017-05-14
- Revision:
- 18:6a4db94011d3
File content as of revision 18:6a4db94011d3:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbed_assert.h" #include "gpio_api.h" #include "pinmap.h" static int gpio_enabled = 0; static void gpio_enable(void) { gpio_enabled = 1; /* Enable AHB clock to the GPIO domain. */ LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6); /* Peripheral reset control to GPIO and GPIO INT, a "1" bring it out of reset. */ LPC_SYSCON->PRESETCTRL &= ~(0x1<<10); LPC_SYSCON->PRESETCTRL |= (0x1<<10); } uint32_t gpio_set(PinName pin) { int f = 0; if (!gpio_enabled) gpio_enable(); pin_function(pin, f); return (1 << ((int)pin & 0x1F)); } void gpio_init(gpio_t *obj, PinName pin) { obj->pin = pin; if (pin == (PinName)NC) return; obj->mask = gpio_set(pin); obj->reg_set = &LPC_GPIO_PORT->SET0; obj->reg_clr = &LPC_GPIO_PORT->CLR0; obj->reg_in = &LPC_GPIO_PORT->PIN0; obj->reg_dir = &LPC_GPIO_PORT->DIR0; } void gpio_mode(gpio_t *obj, PinMode mode) { pin_mode(obj->pin, mode); } void gpio_dir(gpio_t *obj, PinDirection direction) { MBED_ASSERT(obj->pin != (PinName)NC); switch (direction) { case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break; case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break; } }