siva surendar / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/TARGET_Maxim/TARGET_MAX32600/gpio_api.c@150:da61ba4e9755, 2016-11-25 (annotated)

Committer:
sivasuren
Date:
Fri Nov 25 07:57:40 2016 +0000
Revision:
150:da61ba4e9755
Parent:
149:156823d33999 
surendar changes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /*******************************************************************************
<> 144:ef7eb2e8f9f7 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Permission is hereby granted, free of charge, to any person obtaining a
<> 144:ef7eb2e8f9f7 5 * copy of this software and associated documentation files (the "Software"),
<> 144:ef7eb2e8f9f7 6 * to deal in the Software without restriction, including without limitation
<> 144:ef7eb2e8f9f7 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
<> 144:ef7eb2e8f9f7 8 * and/or sell copies of the Software, and to permit persons to whom the
<> 144:ef7eb2e8f9f7 9 * Software is furnished to do so, subject to the following conditions:
<> 144:ef7eb2e8f9f7 10 *
<> 144:ef7eb2e8f9f7 11 * The above copyright notice and this permission notice shall be included
<> 144:ef7eb2e8f9f7 12 * in all copies or substantial portions of the Software.
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
<> 144:ef7eb2e8f9f7 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
<> 144:ef7eb2e8f9f7 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
<> 144:ef7eb2e8f9f7 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
<> 144:ef7eb2e8f9f7 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
<> 144:ef7eb2e8f9f7 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
<> 144:ef7eb2e8f9f7 20 * OTHER DEALINGS IN THE SOFTWARE.
<> 144:ef7eb2e8f9f7 21 *
<> 144:ef7eb2e8f9f7 22 * Except as contained in this notice, the name of Maxim Integrated
<> 144:ef7eb2e8f9f7 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
<> 144:ef7eb2e8f9f7 24 * Products, Inc. Branding Policy.
<> 144:ef7eb2e8f9f7 25 *
<> 144:ef7eb2e8f9f7 26 * The mere transfer of this software does not imply any licenses
<> 144:ef7eb2e8f9f7 27 * of trade secrets, proprietary technology, copyrights, patents,
<> 144:ef7eb2e8f9f7 28 * trademarks, maskwork rights, or any other form of intellectual
<> 144:ef7eb2e8f9f7 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
<> 144:ef7eb2e8f9f7 30 * ownership rights.
<> 144:ef7eb2e8f9f7 31 *******************************************************************************
<> 144:ef7eb2e8f9f7 32 */
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 35 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 36 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 37 #include "gpio_regs.h"
<> 144:ef7eb2e8f9f7 38 #include "clkman_regs.h"
<> 144:ef7eb2e8f9f7 39
<> 144:ef7eb2e8f9f7 40 uint32_t gpio_set(PinName name)
<> 144:ef7eb2e8f9f7 41 {
<> 144:ef7eb2e8f9f7 42 MBED_ASSERT(name != (PinName)NC);
<> 144:ef7eb2e8f9f7 43 pin_function(name, 0);
<> 144:ef7eb2e8f9f7 44 return 1 << PINNAME_TO_PIN(name);
<> 144:ef7eb2e8f9f7 45 }
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47 void gpio_init(gpio_t *obj, PinName name)
<> 144:ef7eb2e8f9f7 48 {
<> 144:ef7eb2e8f9f7 49 obj->name = name;
<> 144:ef7eb2e8f9f7 50 if (name == (PinName)NC) {
<> 144:ef7eb2e8f9f7 51 return;
<> 144:ef7eb2e8f9f7 52 }
<> 144:ef7eb2e8f9f7 53
<> 144:ef7eb2e8f9f7 54 unsigned int port = PINNAME_TO_PORT(name);
<> 144:ef7eb2e8f9f7 55 unsigned int pin = PINNAME_TO_PIN(name);
<> 144:ef7eb2e8f9f7 56
<> 144:ef7eb2e8f9f7 57 obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin);
<> 144:ef7eb2e8f9f7 58 obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin);
<> 144:ef7eb2e8f9f7 59
<> 144:ef7eb2e8f9f7 60 /* Ensure that the GPIO clock is enabled */
<> 144:ef7eb2e8f9f7 61 if (MXC_CLKMAN->clk_ctrl_1_gpio == MXC_E_CLKMAN_CLK_SCALE_DISABLED) {
<> 144:ef7eb2e8f9f7 62 MXC_CLKMAN->clk_ctrl_1_gpio = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
<> 144:ef7eb2e8f9f7 63 }
<> 144:ef7eb2e8f9f7 64 }
<> 144:ef7eb2e8f9f7 65
<> 144:ef7eb2e8f9f7 66 void gpio_mode(gpio_t *obj, PinMode mode)
<> 144:ef7eb2e8f9f7 67 {
<> 144:ef7eb2e8f9f7 68 pin_mode(obj->name, mode);
<> 144:ef7eb2e8f9f7 69 }
<> 144:ef7eb2e8f9f7 70
<> 144:ef7eb2e8f9f7 71 void pin_dir(PinName name, PinDirection direction)
<> 144:ef7eb2e8f9f7 72 {
<> 144:ef7eb2e8f9f7 73 MBED_ASSERT(name != (PinName)NC);
<> 144:ef7eb2e8f9f7 74
<> 144:ef7eb2e8f9f7 75 unsigned int port = PINNAME_TO_PORT(name);
<> 144:ef7eb2e8f9f7 76 unsigned int pin = PINNAME_TO_PIN(name);
<> 144:ef7eb2e8f9f7 77
<> 144:ef7eb2e8f9f7 78 /* Set function */
<> 144:ef7eb2e8f9f7 79 MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin));
<> 144:ef7eb2e8f9f7 80
<> 144:ef7eb2e8f9f7 81 /* Normal input is always enabled */
<> 144:ef7eb2e8f9f7 82 MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin));
<> 144:ef7eb2e8f9f7 83
<> 144:ef7eb2e8f9f7 84 /* Set requested output mode */
<> 144:ef7eb2e8f9f7 85 uint32_t out_mode = MXC_GPIO->out_mode[port];
<> 144:ef7eb2e8f9f7 86 out_mode &= ~(0xF << (4 * pin));
<> 144:ef7eb2e8f9f7 87 out_mode |= (direction << (4 * pin));
<> 144:ef7eb2e8f9f7 88 MXC_GPIO->out_mode[port] = out_mode;
<> 144:ef7eb2e8f9f7 89 }
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 void gpio_dir(gpio_t *obj, PinDirection direction)
<> 144:ef7eb2e8f9f7 92 {
<> 144:ef7eb2e8f9f7 93 pin_dir(obj->name, direction);
<> 144:ef7eb2e8f9f7 94 }