mbed library sources. Supersedes mbed-src.
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Diff: targets/TARGET_ARM_SSG/TARGET_BEETLE/gpio_api.c
- Revision:
- 149:156823d33999
- Parent:
- 144:ef7eb2e8f9f7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/TARGET_ARM_SSG/TARGET_BEETLE/gpio_api.c Fri Oct 28 11:17:30 2016 +0100 @@ -0,0 +1,92 @@ +/* mbed Microcontroller Library + * Copyright (c) 2015 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" + +// function to enable the GPIO pin +uint32_t gpio_set(PinName pin) { + uint32_t pin_value = 0; + + if(pin <= 15) { + pin_value = pin; + } else if (pin >= 16 && pin <= 31) { + pin_value = pin-16; + } else if (pin >= 1001 && pin <= 1004) { + /* Emulated LEDs */ + return (1); + } + + pin_function(pin, 0); + + return (1 << pin_value); +} + +//function to initialise the gpio pin +// this links the board control bits for each pin +// with the object created for the pin +void gpio_init(gpio_t *obj, PinName pin) { + if (pin == NC) { + return; + } else { + int pin_value = 0; + obj->pin = pin; + if (pin <=15) { + pin_value = pin; + } else if (pin >= 16 && pin <= 31) { + pin_value = pin-16; + } else if (pin >= 1001 && pin <= 1004) { + /* Emulated LEDs */ + return; + } + + obj->mask = 0x1 << pin_value; + obj->pin_number = pin; + if (pin <=15) { + obj->reg_data = &CMSDK_GPIO0->DATAOUT; + obj->reg_in = &CMSDK_GPIO0->DATA; + obj->reg_dir = &CMSDK_GPIO0->OUTENABLESET; + obj->reg_dirclr = &CMSDK_GPIO0->OUTENABLECLR; + } else if (pin >= 16 && pin <= 31) { + obj->reg_data = &CMSDK_GPIO1->DATAOUT; + obj->reg_in = &CMSDK_GPIO1->DATA; + obj->reg_dir = &CMSDK_GPIO1->OUTENABLESET; + obj->reg_dirclr = &CMSDK_GPIO1->OUTENABLECLR; + } + } +} + +void gpio_mode(gpio_t *obj, PinMode mode) { + pin_mode(obj->pin, mode); +} + +void gpio_dir(gpio_t *obj, PinDirection direction) { + if(obj->pin >= 0 && obj->pin <= 31) { + switch (direction) { + case PIN_INPUT : *obj->reg_dirclr = obj->mask; break; + case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break; + } + } else { + return; + } +} + +int gpio_is_connected(const gpio_t *obj){ + if(obj->pin != (PinName)NC){ + return 1; + } else { + return 0; + } +}