/******************************************************************************* * Copyright (C) Maxim Integrated Products, Inc., All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of Maxim Integrated * Products, Inc. shall not be used except as stated in the Maxim Integrated * Products, Inc. Branding Policy. * * The mere transfer of this software does not imply any licenses * of trade secrets, proprietary technology, copyrights, patents, * trademarks, maskwork rights, or any other form of intellectual * property whatsoever. Maxim Integrated Products, Inc. retains all * ownership rights. ******************************************************************************* */ #include "mbed_assert.h" #include "gpio_api.h" #include "pinmap.h" #include "gpio_regs.h" uint32_t gpio_set(PinName name) { MBED_ASSERT(name != (PinName)NC); // Set function as GPIO_INPUT (Default) pin_function(name, 0); return 1 << PINNAME_TO_PIN(name); } void gpio_init(gpio_t *obj, PinName name) { obj->name = name; if (name == (PinName)NC) { return; } // Obtain pin number unsigned int pin = PINNAME_TO_PIN(name); // Set register pointers obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO0->out, pin); obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO0->in, pin); obj->mode = PullNone; // Ensure that the GPIO clock is enabled MXC_GCR->pclk_dis0 &= ~MXC_F_GCR_PCLK_DIS0_GPIO0D; } void gpio_mode(gpio_t *obj, PinMode mode) { pin_mode(obj->name, mode); } void pin_dir_mode(PinName name, PinDirection direction, PinMode mode) { MBED_ASSERT(name != (PinName)NC); switch (direction){ case PIN_INPUT: pin_function(name, 0); unsigned int pin = PINNAME_TO_PIN(name); if (mode == PullUp) { MXC_GPIO0->out |= 1 << pin; } else if (mode == PullDown) { MXC_GPIO0->out &= ~(1 << pin); } else { // PullNone MXC_GPIO0->out &= ~(1 << pin); } break; case PIN_OUTPUT: pin_function(name, 1); break; default: break; } pin_mode(name, mode); } void gpio_dir(gpio_t *obj, PinDirection direction) { pin_dir_mode(obj->name, direction, obj->mode); }