tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32610/gpio_api.c

   1 /*******************************************************************************
   2  * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
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  11  * The above copyright notice and this permission notice shall be included
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  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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  23  * Products, Inc. shall not be used except as stated in the Maxim Integrated
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  26  * The mere transfer of this software does not imply any licenses
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  32  */
  33
  34 #include "mbed_assert.h"
  35 #include "gpio_api.h"
  36 #include "pinmap.h"
  37 #include "gpio_regs.h"
  38 #include "clkman_regs.h"
  39
  40 uint32_t gpio_set(PinName name)
  41 {
  42     MBED_ASSERT(name != (PinName)NC);
  43     pin_function(name, 0);
  44     return 1 << PINNAME_TO_PIN(name);
  45 }
  46
  47 void gpio_init(gpio_t *obj, PinName name)
  48 {
  49     obj->name = name;
  50     if (name == (PinName)NC) {
  51         return;
  52     }
  53
  54     unsigned int port = PINNAME_TO_PORT(name);
  55     unsigned int pin = PINNAME_TO_PIN(name);
  56
  57     obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin);
  58     obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin);
  59
  60     /* Ensure that the GPIO clock is enabled */
  61     if (MXC_CLKMAN->clk_ctrl_1_gpio == MXC_E_CLKMAN_CLK_SCALE_DISABLED) {
  62         MXC_CLKMAN->clk_ctrl_1_gpio = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
  63     }
  64 }
  65
  66 void gpio_mode(gpio_t *obj, PinMode mode)
  67 {
  68     pin_mode(obj->name, mode);
  69 }
  70
  71 void pin_dir(PinName name, PinDirection direction)
  72 {
  73     MBED_ASSERT(name != (PinName)NC);
  74
  75     unsigned int port = PINNAME_TO_PORT(name);
  76     unsigned int pin = PINNAME_TO_PIN(name);
  77
  78     /* Set function */
  79     MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin));
  80
  81     /* Normal input is always enabled */
  82     MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin));
  83
  84     /* Set requested output mode */
  85     uint32_t out_mode = MXC_GPIO->out_mode[port];
  86     out_mode &= ~(0xF << (4 * pin));
  87     out_mode |= (direction << (4 * pin));
  88     MXC_GPIO->out_mode[port] = out_mode;
  89 }
  90
  91 void gpio_dir(gpio_t *obj, PinDirection direction)
  92 {
  93     pin_dir(obj->name, direction);
  94 }