Mouse code for the MacroRat
Diff: mbed-dev/targets/TARGET_NXP/TARGET_LPC82X/gpio_api.c
- Revision:
- 18:6a4db94011d3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-dev/targets/TARGET_NXP/TARGET_LPC82X/gpio_api.c Sun May 14 23:18:57 2017 +0000 @@ -0,0 +1,72 @@ +/* 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 &= ~(1 << 10); + LPC_SYSCON->PRESETCTRL |= (1 << 10); +} + +uint32_t gpio_set(PinName pin) +{ + if (!gpio_enabled) + gpio_enable(); + + return (1 << ((int)pin >> PIN_SHIFT)); +} + +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; + } +}