Cortney Padua / mbed-dev

fixed drive strength

Dependents:   capstone_i2c

Fork of mbed-dev by mbed official

targets/TARGET_Maxim/TARGET_MAX32620/gpio_api.c@163:1d4c9d0af1e9, 2017-04-11 (annotated)

Committer:
cpadua
Date:
Tue Apr 11 20:39:24 2017 +0000
Revision:
163:1d4c9d0af1e9
Parent:
149:156823d33999 
fixed i2c-api.c

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /*******************************************************************************
<> 149:156823d33999 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
<> 149:156823d33999 3 *
<> 149:156823d33999 4 * Permission is hereby granted, free of charge, to any person obtaining a
<> 149:156823d33999 5 * copy of this software and associated documentation files (the "Software"),
<> 149:156823d33999 6 * to deal in the Software without restriction, including without limitation
<> 149:156823d33999 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
<> 149:156823d33999 8 * and/or sell copies of the Software, and to permit persons to whom the
<> 149:156823d33999 9 * Software is furnished to do so, subject to the following conditions:
<> 149:156823d33999 10 *
<> 149:156823d33999 11 * The above copyright notice and this permission notice shall be included
<> 149:156823d33999 12 * in all copies or substantial portions of the Software.
<> 149:156823d33999 13 *
<> 149:156823d33999 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
<> 149:156823d33999 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
<> 149:156823d33999 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
<> 149:156823d33999 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
<> 149:156823d33999 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
<> 149:156823d33999 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
<> 149:156823d33999 20 * OTHER DEALINGS IN THE SOFTWARE.
<> 149:156823d33999 21 *
<> 149:156823d33999 22 * Except as contained in this notice, the name of Maxim Integrated
<> 149:156823d33999 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
<> 149:156823d33999 24 * Products, Inc. Branding Policy.
<> 149:156823d33999 25 *
<> 149:156823d33999 26 * The mere transfer of this software does not imply any licenses
<> 149:156823d33999 27 * of trade secrets, proprietary technology, copyrights, patents,
<> 149:156823d33999 28 * trademarks, maskwork rights, or any other form of intellectual
<> 149:156823d33999 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
<> 149:156823d33999 30 * ownership rights.
<> 149:156823d33999 31 *******************************************************************************
<> 149:156823d33999 32 */
<> 149:156823d33999 33
<> 149:156823d33999 34 #include "mbed_assert.h"
<> 149:156823d33999 35 #include "gpio_api.h"
<> 149:156823d33999 36 #include "pinmap.h"
<> 149:156823d33999 37 #include "gpio_regs.h"
<> 149:156823d33999 38 #include "clkman_regs.h"
<> 149:156823d33999 39
<> 149:156823d33999 40 uint32_t gpio_set(PinName name)
<> 149:156823d33999 41 {
<> 149:156823d33999 42 MBED_ASSERT(name != (PinName)NC);
<> 149:156823d33999 43 pin_function(name, 0);
<> 149:156823d33999 44 return 1 << PINNAME_TO_PIN(name);
<> 149:156823d33999 45 }
<> 149:156823d33999 46
<> 149:156823d33999 47 void gpio_init(gpio_t *obj, PinName name)
<> 149:156823d33999 48 {
<> 149:156823d33999 49 obj->name = name;
<> 149:156823d33999 50 if (name == (PinName)NC) {
<> 149:156823d33999 51 return;
<> 149:156823d33999 52 }
<> 149:156823d33999 53
<> 149:156823d33999 54 unsigned int port = PINNAME_TO_PORT(name);
<> 149:156823d33999 55 unsigned int pin = PINNAME_TO_PIN(name);
<> 149:156823d33999 56
<> 149:156823d33999 57 obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin);
<> 149:156823d33999 58 obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin);
<> 149:156823d33999 59
<> 149:156823d33999 60 /* Ensure that the GPIO clock is enabled */
<> 149:156823d33999 61 MXC_CLKMAN->clk_gate_ctrl1 |= MXC_F_CLKMAN_CLK_GATE_CTRL1_GPIO_CLK_GATER;
<> 149:156823d33999 62
<> 149:156823d33999 63 /* Ensure that the GPIO clock is enabled */
<> 149:156823d33999 64 MXC_CLKMAN->sys_clk_ctrl_6_gpio = MXC_S_CLKMAN_CLK_SCALE_DIV_1;
<> 149:156823d33999 65 }
<> 149:156823d33999 66
<> 149:156823d33999 67 void gpio_mode(gpio_t *obj, PinMode mode)
<> 149:156823d33999 68 {
<> 149:156823d33999 69 pin_mode(obj->name, mode);
<> 149:156823d33999 70 }
<> 149:156823d33999 71
<> 149:156823d33999 72 void pin_dir(PinName name, PinDirection direction)
<> 149:156823d33999 73 {
<> 149:156823d33999 74 MBED_ASSERT(name != (PinName)NC);
<> 149:156823d33999 75
<> 149:156823d33999 76 unsigned int port = PINNAME_TO_PORT(name);
<> 149:156823d33999 77 unsigned int pin = PINNAME_TO_PIN(name);
<> 149:156823d33999 78
<> 149:156823d33999 79 /* Set function; Firmware Control (GPIO mode) */
<> 149:156823d33999 80 MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin));
<> 149:156823d33999 81
<> 149:156823d33999 82 /* Normal input is always enabled */
<> 149:156823d33999 83 MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin));
<> 149:156823d33999 84
<> 149:156823d33999 85 if (direction == PIN_INPUT) {
<> 149:156823d33999 86 /* Set requested output mode */
<> 149:156823d33999 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));
<> 149:156823d33999 88
<> 149:156823d33999 89 /* Enable default input weak pull-up by setting corresponding output */
<> 149:156823d33999 90 MXC_GPIO->out_val[port] |= 1 << pin;
<> 149:156823d33999 91 } else {
<> 149:156823d33999 92 /* Set requested output mode */
<> 149:156823d33999 93 MXC_GPIO->out_mode[port] = (MXC_GPIO->out_mode[port] & ~(0xF << (4 * pin))) | (MXC_V_GPIO_OUT_MODE_NORMAL << (4 * pin));
<> 149:156823d33999 94 }
<> 149:156823d33999 95 }
<> 149:156823d33999 96
<> 149:156823d33999 97 void gpio_dir(gpio_t *obj, PinDirection direction)
<> 149:156823d33999 98 {
<> 149:156823d33999 99 pin_dir(obj->name, direction);
<> 149:156823d33999 100 }