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targets/TARGET_NXP/TARGET_LPC15XX/gpio_api.c
- Committer:
- amithy
- Date:
- 2017-11-09
- Revision:
- 178:c26431f84b0d
- Parent:
- 149:156823d33999
File content as of revision 178:c26431f84b0d:
/* mbed Microcontroller Library * Copyright (c) 2006-2014 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 GPIO0/1/2 and IOCON domain. */ LPC_SYSCON->SYSAHBCLKCTRL0 |= (0xFUL << 13); } uint32_t gpio_set(PinName pin) { MBED_ASSERT(pin != (PinName)NC); if (!gpio_enabled) gpio_enable(); return (1UL << ((int)pin & 0x1f)); } void gpio_init(gpio_t *obj, PinName pin) { obj->pin = pin; if (pin == (PinName)NC) return; obj->mask = gpio_set(pin); unsigned int port = (unsigned int)(pin >> 5); obj->reg_set = &LPC_GPIO_PORT->SET[port]; obj->reg_clr = &LPC_GPIO_PORT->CLR[port]; obj->reg_in = &LPC_GPIO_PORT->PIN[port]; obj->reg_dir = &LPC_GPIO_PORT->DIR[port]; } 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; } }