mbed library sources
Dependents: frdm_kl05z_gpio_test
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Diff: targets/hal/TARGET_NXP/TARGET_LPC15XX/gpio_api.c
- Revision:
- 103:9b881da47c92
- Child:
- 113:65a335a675de
diff -r df370e11fcad -r 9b881da47c92 targets/hal/TARGET_NXP/TARGET_LPC15XX/gpio_api.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_NXP/TARGET_LPC15XX/gpio_api.c Thu Feb 20 23:00:08 2014 +0000 @@ -0,0 +1,65 @@ +/* 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 "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) { + + if (!gpio_enabled) + gpio_enable(); + + return (1UL << ((int)pin & 0x1f)); +} + +void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) { + if(pin == NC) return; + + obj->pin = pin; + 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]; + + gpio_dir(obj, direction); + switch (direction) { + case PIN_OUTPUT: pin_mode(pin, PullNone); break; + case PIN_INPUT : pin_mode(pin, PullDown); break; + } +} + +void gpio_mode(gpio_t *obj, PinMode mode) { + pin_mode(obj->pin, mode); +} + +void gpio_dir(gpio_t *obj, PinDirection direction) { + switch (direction) { + case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break; + case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break; + } +}