Umar Naeem / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by Umar Naeem

targets/TARGET_Maxim/TARGET_MAX32630/gpio_api.c@157:ff67d9f36b67, 2017-02-02 (annotated)

Committer:
<>
Date:
Thu Feb 02 17:01:33 2017 +0000
Revision:
157:ff67d9f36b67
This updates the lib to the mbed lib v135

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 157:ff67d9f36b67 1 /*******************************************************************************
<> 157:ff67d9f36b67 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
<> 157:ff67d9f36b67 3 *
<> 157:ff67d9f36b67 4 * Permission is hereby granted, free of charge, to any person obtaining a
<> 157:ff67d9f36b67 5 * copy of this software and associated documentation files (the "Software"),
<> 157:ff67d9f36b67 6 * to deal in the Software without restriction, including without limitation
<> 157:ff67d9f36b67 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
<> 157:ff67d9f36b67 8 * and/or sell copies of the Software, and to permit persons to whom the
<> 157:ff67d9f36b67 9 * Software is furnished to do so, subject to the following conditions:
<> 157:ff67d9f36b67 10 *
<> 157:ff67d9f36b67 11 * The above copyright notice and this permission notice shall be included
<> 157:ff67d9f36b67 12 * in all copies or substantial portions of the Software.
<> 157:ff67d9f36b67 13 *
<> 157:ff67d9f36b67 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
<> 157:ff67d9f36b67 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
<> 157:ff67d9f36b67 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
<> 157:ff67d9f36b67 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
<> 157:ff67d9f36b67 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
<> 157:ff67d9f36b67 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
<> 157:ff67d9f36b67 20 * OTHER DEALINGS IN THE SOFTWARE.
<> 157:ff67d9f36b67 21 *
<> 157:ff67d9f36b67 22 * Except as contained in this notice, the name of Maxim Integrated
<> 157:ff67d9f36b67 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
<> 157:ff67d9f36b67 24 * Products, Inc. Branding Policy.
<> 157:ff67d9f36b67 25 *
<> 157:ff67d9f36b67 26 * The mere transfer of this software does not imply any licenses
<> 157:ff67d9f36b67 27 * of trade secrets, proprietary technology, copyrights, patents,
<> 157:ff67d9f36b67 28 * trademarks, maskwork rights, or any other form of intellectual
<> 157:ff67d9f36b67 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
<> 157:ff67d9f36b67 30 * ownership rights.
<> 157:ff67d9f36b67 31 *******************************************************************************
<> 157:ff67d9f36b67 32 */
<> 157:ff67d9f36b67 33
<> 157:ff67d9f36b67 34 #include "mbed_assert.h"
<> 157:ff67d9f36b67 35 #include "gpio_api.h"
<> 157:ff67d9f36b67 36 #include "pinmap.h"
<> 157:ff67d9f36b67 37 #include "gpio_regs.h"
<> 157:ff67d9f36b67 38 #include "clkman_regs.h"
<> 157:ff67d9f36b67 39
<> 157:ff67d9f36b67 40 uint32_t gpio_set(PinName name)
<> 157:ff67d9f36b67 41 {
<> 157:ff67d9f36b67 42 MBED_ASSERT(name != (PinName)NC);
<> 157:ff67d9f36b67 43 pin_function(name, 0);
<> 157:ff67d9f36b67 44 return 1 << PINNAME_TO_PIN(name);
<> 157:ff67d9f36b67 45 }
<> 157:ff67d9f36b67 46
<> 157:ff67d9f36b67 47 void gpio_init(gpio_t *obj, PinName name)
<> 157:ff67d9f36b67 48 {
<> 157:ff67d9f36b67 49 obj->name = name;
<> 157:ff67d9f36b67 50 if (name == (PinName)NC) {
<> 157:ff67d9f36b67 51 return;
<> 157:ff67d9f36b67 52 }
<> 157:ff67d9f36b67 53
<> 157:ff67d9f36b67 54 unsigned int port = PINNAME_TO_PORT(name);
<> 157:ff67d9f36b67 55 unsigned int pin = PINNAME_TO_PIN(name);
<> 157:ff67d9f36b67 56
<> 157:ff67d9f36b67 57 obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin);
<> 157:ff67d9f36b67 58 obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin);
<> 157:ff67d9f36b67 59 obj->mode = PullDefault;
<> 157:ff67d9f36b67 60
<> 157:ff67d9f36b67 61 /* Ensure that the GPIO clock is enabled */
<> 157:ff67d9f36b67 62 MXC_CLKMAN->clk_gate_ctrl1 |= MXC_F_CLKMAN_CLK_GATE_CTRL1_GPIO_CLK_GATER;
<> 157:ff67d9f36b67 63
<> 157:ff67d9f36b67 64 /* Ensure that the GPIO clock is enabled */
<> 157:ff67d9f36b67 65 MXC_CLKMAN->sys_clk_ctrl_6_gpio = MXC_S_CLKMAN_CLK_SCALE_DIV_1;
<> 157:ff67d9f36b67 66 }
<> 157:ff67d9f36b67 67
<> 157:ff67d9f36b67 68 void gpio_mode(gpio_t *obj, PinMode mode)
<> 157:ff67d9f36b67 69 {
<> 157:ff67d9f36b67 70 obj->mode = mode;
<> 157:ff67d9f36b67 71 pin_mode(obj->name, mode);
<> 157:ff67d9f36b67 72 }
<> 157:ff67d9f36b67 73
<> 157:ff67d9f36b67 74 void pin_dir_mode(PinName name, PinDirection direction, PinMode mode)
<> 157:ff67d9f36b67 75 {
<> 157:ff67d9f36b67 76 MBED_ASSERT(name != (PinName)NC);
<> 157:ff67d9f36b67 77
<> 157:ff67d9f36b67 78 unsigned int port = PINNAME_TO_PORT(name);
<> 157:ff67d9f36b67 79 unsigned int pin = PINNAME_TO_PIN(name);
<> 157:ff67d9f36b67 80
<> 157:ff67d9f36b67 81 /* Set function; Firmware Control (GPIO mode) */
<> 157:ff67d9f36b67 82 MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin));
<> 157:ff67d9f36b67 83
<> 157:ff67d9f36b67 84 /* Normal input is always enabled */
<> 157:ff67d9f36b67 85 MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin));
<> 157:ff67d9f36b67 86
<> 157:ff67d9f36b67 87 uint32_t new_mode;
<> 157:ff67d9f36b67 88 if (direction == PIN_OUTPUT) {
<> 157:ff67d9f36b67 89 // PullUp = not valid,
<> 157:ff67d9f36b67 90 // PullDown = not valid,
<> 157:ff67d9f36b67 91 // OpenDrain = MXC_V_GPIO_OUT_MODE_OD,
<> 157:ff67d9f36b67 92 // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL,
<> 157:ff67d9f36b67 93 if (mode == OpenDrain) {
<> 157:ff67d9f36b67 94 new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
<> 157:ff67d9f36b67 95 } else {
<> 157:ff67d9f36b67 96 new_mode = MXC_V_GPIO_OUT_MODE_NORMAL;
<> 157:ff67d9f36b67 97 }
<> 157:ff67d9f36b67 98 } else {
<> 157:ff67d9f36b67 99 // PullUp = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP
<> 157:ff67d9f36b67 100 // PullDown = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN
<> 157:ff67d9f36b67 101 // OpenDrain = MXC_V_GPIO_OUT_MODE_OD
<> 157:ff67d9f36b67 102 // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z
<> 157:ff67d9f36b67 103 if (mode == PullUp) {
<> 157:ff67d9f36b67 104 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP;
<> 157:ff67d9f36b67 105 MXC_GPIO->out_val[port] |= 1 << pin;
<> 157:ff67d9f36b67 106 } else if (mode == PullDown) {
<> 157:ff67d9f36b67 107 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN;
<> 157:ff67d9f36b67 108 MXC_GPIO->out_val[port] &= ~(1 << pin);
<> 157:ff67d9f36b67 109 } else if (mode == OpenDrain) {
<> 157:ff67d9f36b67 110 new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
<> 157:ff67d9f36b67 111 MXC_GPIO->out_val[port] |= 1 << pin;
<> 157:ff67d9f36b67 112 } else {
<> 157:ff67d9f36b67 113 new_mode = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z;
<> 157:ff67d9f36b67 114 MXC_GPIO->out_val[port] &= ~(1 << pin);
<> 157:ff67d9f36b67 115 }
<> 157:ff67d9f36b67 116 }
<> 157:ff67d9f36b67 117
<> 157:ff67d9f36b67 118 /* Set new mode */
<> 157:ff67d9f36b67 119 uint32_t out_mode = MXC_GPIO->out_mode[port];
<> 157:ff67d9f36b67 120 out_mode &= ~(0xF << (pin * 4));
<> 157:ff67d9f36b67 121 out_mode |= (new_mode << (pin * 4));
<> 157:ff67d9f36b67 122 MXC_GPIO->out_mode[port] = out_mode;
<> 157:ff67d9f36b67 123 }
<> 157:ff67d9f36b67 124
<> 157:ff67d9f36b67 125 void gpio_dir(gpio_t *obj, PinDirection direction)
<> 157:ff67d9f36b67 126 {
<> 157:ff67d9f36b67 127 pin_dir_mode(obj->name, direction, obj->mode);
<> 157:ff67d9f36b67 128 }