mbed library sources
Dependents: frdm_kl05z_gpio_test
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Diff: targets/hal/TARGET_NXP/TARGET_LPC11XX_11CXX/gpio_api.c
- Revision:
- 30:91c1d09ada54
- Child:
- 45:70eead282f0a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_NXP/TARGET_LPC11XX_11CXX/gpio_api.c Wed Sep 25 10:30:04 2013 +0100 @@ -0,0 +1,65 @@ +/* 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 "gpio_api.h" +#include "pinmap.h" +#include "reserved_pins.h" + +static const PinName reserved_pins[] = TARGET_RESERVED_PINS; + +uint32_t gpio_set(PinName pin) { + // PIO default value of following ports are not same as others + unsigned i; + int f = 0; + + for (i = 0; i < sizeof(reserved_pins) / sizeof(int); i ++) + if (pin == reserved_pins[i]) { + f = 1; + break; + } + + pin_function(pin, f); + return ((pin & 0x0F00) >> 8); +} + +void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) { + if(pin == NC) return; + + obj->pin = pin; + LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (((pin & 0xF000) >> PORT_SHIFT) * 0x10000))); + + obj->reg_mask_read = &port_reg->MASKED_ACCESS[1 << gpio_set(pin)]; + obj->reg_dir = &port_reg->DIR; + obj->reg_write = &port_reg->DATA; + + 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) { + int pin_number = ((obj->pin & 0x0F00) >> 8); + switch (direction) { + case PIN_INPUT : *obj->reg_dir &= ~(1 << pin_number); break; + case PIN_OUTPUT: *obj->reg_dir |= (1 << pin_number); break; + } +}