mirror of https://github.com/ARMmbed/mbed-os.git
101 lines
3.6 KiB
C
101 lines
3.6 KiB
C
/*******************************************************************************
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* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of Maxim Integrated
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* Products, Inc. shall not be used except as stated in the Maxim Integrated
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* Products, Inc. Branding Policy.
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*
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* The mere transfer of this software does not imply any licenses
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* of trade secrets, proprietary technology, copyrights, patents,
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* trademarks, maskwork rights, or any other form of intellectual
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* property whatsoever. Maxim Integrated Products, Inc. retains all
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* ownership rights.
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*******************************************************************************
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*/
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#include "mbed_assert.h"
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#include "gpio_api.h"
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#include "pinmap.h"
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#include "gpio_regs.h"
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#include "clkman_regs.h"
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uint32_t gpio_set(PinName name)
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{
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MBED_ASSERT(name != (PinName)NC);
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pin_function(name, 0);
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return 1 << PINNAME_TO_PIN(name);
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}
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void gpio_init(gpio_t *obj, PinName name)
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{
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obj->name = name;
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if (name == (PinName)NC) {
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return;
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}
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unsigned int port = PINNAME_TO_PORT(name);
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unsigned int pin = PINNAME_TO_PIN(name);
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obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin);
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obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin);
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/* Ensure that the GPIO clock is enabled */
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MXC_CLKMAN->clk_gate_ctrl1 |= MXC_F_CLKMAN_CLK_GATE_CTRL1_GPIO_CLK_GATER;
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/* Ensure that the GPIO clock is enabled */
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MXC_CLKMAN->sys_clk_ctrl_6_gpio = MXC_S_CLKMAN_CLK_SCALE_DIV_1;
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}
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void gpio_mode(gpio_t *obj, PinMode mode)
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{
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pin_mode(obj->name, mode);
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}
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void pin_dir(PinName name, PinDirection direction)
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{
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MBED_ASSERT(name != (PinName)NC);
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unsigned int port = PINNAME_TO_PORT(name);
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unsigned int pin = PINNAME_TO_PIN(name);
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/* Set function; Firmware Control (GPIO mode) */
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MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin));
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/* Normal input is always enabled */
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MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin));
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if (direction == PIN_INPUT) {
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/* Set requested output mode */
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MXC_GPIO->out_mode[port] = (MXC_GPIO->out_mode[port] & ~(0xF << (4 * pin))) | (MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP << (4 * pin));
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/* Enable default input weak pull-up by setting corresponding output */
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MXC_GPIO->out_val[port] |= 1 << pin;
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} else {
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/* Set requested output mode */
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MXC_GPIO->out_mode[port] = (MXC_GPIO->out_mode[port] & ~(0xF << (4 * pin))) | (MXC_V_GPIO_OUT_MODE_NORMAL << (4 * pin));
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}
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}
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void gpio_dir(gpio_t *obj, PinDirection direction)
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{
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pin_dir(obj->name, direction);
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}
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