MacroRat / MouseCode

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Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_Maxim/TARGET_MAX32620/gpio_api.c@18:6a4db94011d3, 2017-05-14 (annotated)

Committer:
sahilmgandhi
Date:
Sun May 14 23:18:57 2017 +0000
Revision:
18:6a4db94011d3
Publishing again

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /*******************************************************************************
sahilmgandhi 18:6a4db94011d3 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
sahilmgandhi 18:6a4db94011d3 3 *
sahilmgandhi 18:6a4db94011d3 4 * Permission is hereby granted, free of charge, to any person obtaining a
sahilmgandhi 18:6a4db94011d3 5 * copy of this software and associated documentation files (the "Software"),
sahilmgandhi 18:6a4db94011d3 6 * to deal in the Software without restriction, including without limitation
sahilmgandhi 18:6a4db94011d3 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
sahilmgandhi 18:6a4db94011d3 8 * and/or sell copies of the Software, and to permit persons to whom the
sahilmgandhi 18:6a4db94011d3 9 * Software is furnished to do so, subject to the following conditions:
sahilmgandhi 18:6a4db94011d3 10 *
sahilmgandhi 18:6a4db94011d3 11 * The above copyright notice and this permission notice shall be included
sahilmgandhi 18:6a4db94011d3 12 * in all copies or substantial portions of the Software.
sahilmgandhi 18:6a4db94011d3 13 *
sahilmgandhi 18:6a4db94011d3 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
sahilmgandhi 18:6a4db94011d3 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
sahilmgandhi 18:6a4db94011d3 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
sahilmgandhi 18:6a4db94011d3 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
sahilmgandhi 18:6a4db94011d3 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
sahilmgandhi 18:6a4db94011d3 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
sahilmgandhi 18:6a4db94011d3 20 * OTHER DEALINGS IN THE SOFTWARE.
sahilmgandhi 18:6a4db94011d3 21 *
sahilmgandhi 18:6a4db94011d3 22 * Except as contained in this notice, the name of Maxim Integrated
sahilmgandhi 18:6a4db94011d3 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
sahilmgandhi 18:6a4db94011d3 24 * Products, Inc. Branding Policy.
sahilmgandhi 18:6a4db94011d3 25 *
sahilmgandhi 18:6a4db94011d3 26 * The mere transfer of this software does not imply any licenses
sahilmgandhi 18:6a4db94011d3 27 * of trade secrets, proprietary technology, copyrights, patents,
sahilmgandhi 18:6a4db94011d3 28 * trademarks, maskwork rights, or any other form of intellectual
sahilmgandhi 18:6a4db94011d3 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
sahilmgandhi 18:6a4db94011d3 30 * ownership rights.
sahilmgandhi 18:6a4db94011d3 31 *******************************************************************************
sahilmgandhi 18:6a4db94011d3 32 */
sahilmgandhi 18:6a4db94011d3 33
sahilmgandhi 18:6a4db94011d3 34 #include "mbed_assert.h"
sahilmgandhi 18:6a4db94011d3 35 #include "gpio_api.h"
sahilmgandhi 18:6a4db94011d3 36 #include "pinmap.h"
sahilmgandhi 18:6a4db94011d3 37 #include "gpio_regs.h"
sahilmgandhi 18:6a4db94011d3 38 #include "clkman_regs.h"
sahilmgandhi 18:6a4db94011d3 39
sahilmgandhi 18:6a4db94011d3 40 uint32_t gpio_set(PinName name)
sahilmgandhi 18:6a4db94011d3 41 {
sahilmgandhi 18:6a4db94011d3 42 MBED_ASSERT(name != (PinName)NC);
sahilmgandhi 18:6a4db94011d3 43 pin_function(name, 0);
sahilmgandhi 18:6a4db94011d3 44 return 1 << PINNAME_TO_PIN(name);
sahilmgandhi 18:6a4db94011d3 45 }
sahilmgandhi 18:6a4db94011d3 46
sahilmgandhi 18:6a4db94011d3 47 void gpio_init(gpio_t *obj, PinName name)
sahilmgandhi 18:6a4db94011d3 48 {
sahilmgandhi 18:6a4db94011d3 49 obj->name = name;
sahilmgandhi 18:6a4db94011d3 50 if (name == (PinName)NC) {
sahilmgandhi 18:6a4db94011d3 51 return;
sahilmgandhi 18:6a4db94011d3 52 }
sahilmgandhi 18:6a4db94011d3 53
sahilmgandhi 18:6a4db94011d3 54 unsigned int port = PINNAME_TO_PORT(name);
sahilmgandhi 18:6a4db94011d3 55 unsigned int pin = PINNAME_TO_PIN(name);
sahilmgandhi 18:6a4db94011d3 56
sahilmgandhi 18:6a4db94011d3 57 obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin);
sahilmgandhi 18:6a4db94011d3 58 obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin);
sahilmgandhi 18:6a4db94011d3 59
sahilmgandhi 18:6a4db94011d3 60 /* Ensure that the GPIO clock is enabled */
sahilmgandhi 18:6a4db94011d3 61 MXC_CLKMAN->clk_gate_ctrl1 |= MXC_F_CLKMAN_CLK_GATE_CTRL1_GPIO_CLK_GATER;
sahilmgandhi 18:6a4db94011d3 62
sahilmgandhi 18:6a4db94011d3 63 /* Ensure that the GPIO clock is enabled */
sahilmgandhi 18:6a4db94011d3 64 MXC_CLKMAN->sys_clk_ctrl_6_gpio = MXC_S_CLKMAN_CLK_SCALE_DIV_1;
sahilmgandhi 18:6a4db94011d3 65 }
sahilmgandhi 18:6a4db94011d3 66
sahilmgandhi 18:6a4db94011d3 67 void gpio_mode(gpio_t *obj, PinMode mode)
sahilmgandhi 18:6a4db94011d3 68 {
sahilmgandhi 18:6a4db94011d3 69 pin_mode(obj->name, mode);
sahilmgandhi 18:6a4db94011d3 70 }
sahilmgandhi 18:6a4db94011d3 71
sahilmgandhi 18:6a4db94011d3 72 void pin_dir(PinName name, PinDirection direction)
sahilmgandhi 18:6a4db94011d3 73 {
sahilmgandhi 18:6a4db94011d3 74 MBED_ASSERT(name != (PinName)NC);
sahilmgandhi 18:6a4db94011d3 75
sahilmgandhi 18:6a4db94011d3 76 unsigned int port = PINNAME_TO_PORT(name);
sahilmgandhi 18:6a4db94011d3 77 unsigned int pin = PINNAME_TO_PIN(name);
sahilmgandhi 18:6a4db94011d3 78
sahilmgandhi 18:6a4db94011d3 79 /* Set function; Firmware Control (GPIO mode) */
sahilmgandhi 18:6a4db94011d3 80 MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin));
sahilmgandhi 18:6a4db94011d3 81
sahilmgandhi 18:6a4db94011d3 82 /* Normal input is always enabled */
sahilmgandhi 18:6a4db94011d3 83 MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin));
sahilmgandhi 18:6a4db94011d3 84
sahilmgandhi 18:6a4db94011d3 85 if (direction == PIN_INPUT) {
sahilmgandhi 18:6a4db94011d3 86 /* Set requested output mode */
sahilmgandhi 18:6a4db94011d3 87 MXC_GPIO->out_mode[port] = (MXC_GPIO->out_mode[port] & ~(0xF << (4 * pin))) | (MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP << (4 * pin));
sahilmgandhi 18:6a4db94011d3 88
sahilmgandhi 18:6a4db94011d3 89 /* Enable default input weak pull-up by setting corresponding output */
sahilmgandhi 18:6a4db94011d3 90 MXC_GPIO->out_val[port] |= 1 << pin;
sahilmgandhi 18:6a4db94011d3 91 } else {
sahilmgandhi 18:6a4db94011d3 92 /* Set requested output mode */
sahilmgandhi 18:6a4db94011d3 93 MXC_GPIO->out_mode[port] = (MXC_GPIO->out_mode[port] & ~(0xF << (4 * pin))) | (MXC_V_GPIO_OUT_MODE_NORMAL << (4 * pin));
sahilmgandhi 18:6a4db94011d3 94 }
sahilmgandhi 18:6a4db94011d3 95 }
sahilmgandhi 18:6a4db94011d3 96
sahilmgandhi 18:6a4db94011d3 97 void gpio_dir(gpio_t *obj, PinDirection direction)
sahilmgandhi 18:6a4db94011d3 98 {
sahilmgandhi 18:6a4db94011d3 99 pin_dir(obj->name, direction);
sahilmgandhi 18:6a4db94011d3 100 }