Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_Maxim/TARGET_MAX32600/gpio_api.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

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elessair 0:f269e3021894 1 /*******************************************************************************
elessair 0:f269e3021894 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Permission is hereby granted, free of charge, to any person obtaining a
elessair 0:f269e3021894 5 * copy of this software and associated documentation files (the "Software"),
elessair 0:f269e3021894 6 * to deal in the Software without restriction, including without limitation
elessair 0:f269e3021894 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
elessair 0:f269e3021894 8 * and/or sell copies of the Software, and to permit persons to whom the
elessair 0:f269e3021894 9 * Software is furnished to do so, subject to the following conditions:
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * The above copyright notice and this permission notice shall be included
elessair 0:f269e3021894 12 * in all copies or substantial portions of the Software.
elessair 0:f269e3021894 13 *
elessair 0:f269e3021894 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
elessair 0:f269e3021894 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
elessair 0:f269e3021894 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
elessair 0:f269e3021894 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
elessair 0:f269e3021894 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
elessair 0:f269e3021894 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
elessair 0:f269e3021894 20 * OTHER DEALINGS IN THE SOFTWARE.
elessair 0:f269e3021894 21 *
elessair 0:f269e3021894 22 * Except as contained in this notice, the name of Maxim Integrated
elessair 0:f269e3021894 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
elessair 0:f269e3021894 24 * Products, Inc. Branding Policy.
elessair 0:f269e3021894 25 *
elessair 0:f269e3021894 26 * The mere transfer of this software does not imply any licenses
elessair 0:f269e3021894 27 * of trade secrets, proprietary technology, copyrights, patents,
elessair 0:f269e3021894 28 * trademarks, maskwork rights, or any other form of intellectual
elessair 0:f269e3021894 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
elessair 0:f269e3021894 30 * ownership rights.
elessair 0:f269e3021894 31 *******************************************************************************
elessair 0:f269e3021894 32 */
elessair 0:f269e3021894 33
elessair 0:f269e3021894 34 #include "mbed_assert.h"
elessair 0:f269e3021894 35 #include "gpio_api.h"
elessair 0:f269e3021894 36 #include "pinmap.h"
elessair 0:f269e3021894 37 #include "gpio_regs.h"
elessair 0:f269e3021894 38 #include "clkman_regs.h"
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 uint32_t gpio_set(PinName name)
elessair 0:f269e3021894 41 {
elessair 0:f269e3021894 42 MBED_ASSERT(name != (PinName)NC);
elessair 0:f269e3021894 43 pin_function(name, 0);
elessair 0:f269e3021894 44 return 1 << PINNAME_TO_PIN(name);
elessair 0:f269e3021894 45 }
elessair 0:f269e3021894 46
elessair 0:f269e3021894 47 void gpio_init(gpio_t *obj, PinName name)
elessair 0:f269e3021894 48 {
elessair 0:f269e3021894 49 obj->name = name;
elessair 0:f269e3021894 50 if (name == (PinName)NC) {
elessair 0:f269e3021894 51 return;
elessair 0:f269e3021894 52 }
elessair 0:f269e3021894 53
elessair 0:f269e3021894 54 unsigned int port = PINNAME_TO_PORT(name);
elessair 0:f269e3021894 55 unsigned int pin = PINNAME_TO_PIN(name);
elessair 0:f269e3021894 56
elessair 0:f269e3021894 57 obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin);
elessair 0:f269e3021894 58 obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin);
elessair 0:f269e3021894 59
elessair 0:f269e3021894 60 /* Ensure that the GPIO clock is enabled */
elessair 0:f269e3021894 61 if (MXC_CLKMAN->clk_ctrl_1_gpio == MXC_E_CLKMAN_CLK_SCALE_DISABLED) {
elessair 0:f269e3021894 62 MXC_CLKMAN->clk_ctrl_1_gpio = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
elessair 0:f269e3021894 63 }
elessair 0:f269e3021894 64 }
elessair 0:f269e3021894 65
elessair 0:f269e3021894 66 void gpio_mode(gpio_t *obj, PinMode mode)
elessair 0:f269e3021894 67 {
elessair 0:f269e3021894 68 pin_mode(obj->name, mode);
elessair 0:f269e3021894 69 }
elessair 0:f269e3021894 70
elessair 0:f269e3021894 71 void pin_dir(PinName name, PinDirection direction)
elessair 0:f269e3021894 72 {
elessair 0:f269e3021894 73 MBED_ASSERT(name != (PinName)NC);
elessair 0:f269e3021894 74
elessair 0:f269e3021894 75 unsigned int port = PINNAME_TO_PORT(name);
elessair 0:f269e3021894 76 unsigned int pin = PINNAME_TO_PIN(name);
elessair 0:f269e3021894 77
elessair 0:f269e3021894 78 /* Set function */
elessair 0:f269e3021894 79 MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin));
elessair 0:f269e3021894 80
elessair 0:f269e3021894 81 /* Normal input is always enabled */
elessair 0:f269e3021894 82 MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin));
elessair 0:f269e3021894 83
elessair 0:f269e3021894 84 /* Set requested output mode */
elessair 0:f269e3021894 85 uint32_t out_mode = MXC_GPIO->out_mode[port];
elessair 0:f269e3021894 86 out_mode &= ~(0xF << (4 * pin));
elessair 0:f269e3021894 87 out_mode |= (direction << (4 * pin));
elessair 0:f269e3021894 88 MXC_GPIO->out_mode[port] = out_mode;
elessair 0:f269e3021894 89 }
elessair 0:f269e3021894 90
elessair 0:f269e3021894 91 void gpio_dir(gpio_t *obj, PinDirection direction)
elessair 0:f269e3021894 92 {
elessair 0:f269e3021894 93 pin_dir(obj->name, direction);
elessair 0:f269e3021894 94 }