Elijah Stanger-Jones / mbed-dev-f303

test

targets/TARGET_Maxim/TARGET_MAX32630/gpio_api.c@2:4364577b5ad8, 2020-11-09 (annotated)

Committer:
elijahsj
Date:
Mon Nov 09 00:33:19 2020 -0500
Revision:
2:4364577b5ad8
Parent:
1:8a094db1347f 
copied mbed library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elijahsj 1:8a094db1347f 1 /*******************************************************************************
elijahsj 1:8a094db1347f 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
elijahsj 1:8a094db1347f 3 *
elijahsj 1:8a094db1347f 4 * Permission is hereby granted, free of charge, to any person obtaining a
elijahsj 1:8a094db1347f 5 * copy of this software and associated documentation files (the "Software"),
elijahsj 1:8a094db1347f 6 * to deal in the Software without restriction, including without limitation
elijahsj 1:8a094db1347f 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
elijahsj 1:8a094db1347f 8 * and/or sell copies of the Software, and to permit persons to whom the
elijahsj 1:8a094db1347f 9 * Software is furnished to do so, subject to the following conditions:
elijahsj 1:8a094db1347f 10 *
elijahsj 1:8a094db1347f 11 * The above copyright notice and this permission notice shall be included
elijahsj 1:8a094db1347f 12 * in all copies or substantial portions of the Software.
elijahsj 1:8a094db1347f 13 *
elijahsj 1:8a094db1347f 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
elijahsj 1:8a094db1347f 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
elijahsj 1:8a094db1347f 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
elijahsj 1:8a094db1347f 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
elijahsj 1:8a094db1347f 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
elijahsj 1:8a094db1347f 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
elijahsj 1:8a094db1347f 20 * OTHER DEALINGS IN THE SOFTWARE.
elijahsj 1:8a094db1347f 21 *
elijahsj 1:8a094db1347f 22 * Except as contained in this notice, the name of Maxim Integrated
elijahsj 1:8a094db1347f 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
elijahsj 1:8a094db1347f 24 * Products, Inc. Branding Policy.
elijahsj 1:8a094db1347f 25 *
elijahsj 1:8a094db1347f 26 * The mere transfer of this software does not imply any licenses
elijahsj 1:8a094db1347f 27 * of trade secrets, proprietary technology, copyrights, patents,
elijahsj 1:8a094db1347f 28 * trademarks, maskwork rights, or any other form of intellectual
elijahsj 1:8a094db1347f 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
elijahsj 1:8a094db1347f 30 * ownership rights.
elijahsj 1:8a094db1347f 31 *******************************************************************************
elijahsj 1:8a094db1347f 32 */
elijahsj 1:8a094db1347f 33
elijahsj 1:8a094db1347f 34 #include "mbed_assert.h"
elijahsj 1:8a094db1347f 35 #include "gpio_api.h"
elijahsj 1:8a094db1347f 36 #include "pinmap.h"
elijahsj 1:8a094db1347f 37 #include "gpio_regs.h"
elijahsj 1:8a094db1347f 38 #include "clkman_regs.h"
elijahsj 1:8a094db1347f 39
elijahsj 1:8a094db1347f 40 uint32_t gpio_set(PinName name)
elijahsj 1:8a094db1347f 41 {
elijahsj 1:8a094db1347f 42 MBED_ASSERT(name != (PinName)NC);
elijahsj 1:8a094db1347f 43 pin_function(name, 0);
elijahsj 1:8a094db1347f 44 return 1 << PINNAME_TO_PIN(name);
elijahsj 1:8a094db1347f 45 }
elijahsj 1:8a094db1347f 46
elijahsj 1:8a094db1347f 47 void gpio_init(gpio_t *obj, PinName name)
elijahsj 1:8a094db1347f 48 {
elijahsj 1:8a094db1347f 49 obj->name = name;
elijahsj 1:8a094db1347f 50 if (name == (PinName)NC) {
elijahsj 1:8a094db1347f 51 return;
elijahsj 1:8a094db1347f 52 }
elijahsj 1:8a094db1347f 53
elijahsj 1:8a094db1347f 54 unsigned int port = PINNAME_TO_PORT(name);
elijahsj 1:8a094db1347f 55 unsigned int pin = PINNAME_TO_PIN(name);
elijahsj 1:8a094db1347f 56
elijahsj 1:8a094db1347f 57 obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin);
elijahsj 1:8a094db1347f 58 obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin);
elijahsj 1:8a094db1347f 59 obj->mode = PullDefault;
elijahsj 1:8a094db1347f 60
elijahsj 1:8a094db1347f 61 /* Ensure that the GPIO clock is enabled */
elijahsj 1:8a094db1347f 62 MXC_CLKMAN->clk_gate_ctrl1 |= MXC_F_CLKMAN_CLK_GATE_CTRL1_GPIO_CLK_GATER;
elijahsj 1:8a094db1347f 63
elijahsj 1:8a094db1347f 64 /* Ensure that the GPIO clock is enabled */
elijahsj 1:8a094db1347f 65 MXC_CLKMAN->sys_clk_ctrl_6_gpio = MXC_S_CLKMAN_CLK_SCALE_DIV_1;
elijahsj 1:8a094db1347f 66 }
elijahsj 1:8a094db1347f 67
elijahsj 1:8a094db1347f 68 void gpio_mode(gpio_t *obj, PinMode mode)
elijahsj 1:8a094db1347f 69 {
elijahsj 1:8a094db1347f 70 #ifdef OPEN_DRAIN_LEDS
elijahsj 1:8a094db1347f 71 if ((obj->name == LED1) || (obj->name == LED2) ||
elijahsj 1:8a094db1347f 72 (obj->name == LED3) || (obj->name == LED4)) {
elijahsj 1:8a094db1347f 73 mode = OpenDrain;
elijahsj 1:8a094db1347f 74 }
elijahsj 1:8a094db1347f 75 #endif
elijahsj 1:8a094db1347f 76
elijahsj 1:8a094db1347f 77 obj->mode = mode;
elijahsj 1:8a094db1347f 78 pin_mode(obj->name, mode);
elijahsj 1:8a094db1347f 79 }
elijahsj 1:8a094db1347f 80
elijahsj 1:8a094db1347f 81 void pin_dir_mode(PinName name, PinDirection direction, PinMode mode)
elijahsj 1:8a094db1347f 82 {
elijahsj 1:8a094db1347f 83 MBED_ASSERT(name != (PinName)NC);
elijahsj 1:8a094db1347f 84
elijahsj 1:8a094db1347f 85 unsigned int port = PINNAME_TO_PORT(name);
elijahsj 1:8a094db1347f 86 unsigned int pin = PINNAME_TO_PIN(name);
elijahsj 1:8a094db1347f 87
elijahsj 1:8a094db1347f 88 /* Set function; Firmware Control (GPIO mode) */
elijahsj 1:8a094db1347f 89 MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin));
elijahsj 1:8a094db1347f 90
elijahsj 1:8a094db1347f 91 /* Normal input is always enabled */
elijahsj 1:8a094db1347f 92 MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin));
elijahsj 1:8a094db1347f 93
elijahsj 1:8a094db1347f 94 uint32_t new_mode;
elijahsj 1:8a094db1347f 95 if (direction == PIN_OUTPUT) {
elijahsj 1:8a094db1347f 96 // PullUp = not valid,
elijahsj 1:8a094db1347f 97 // PullDown = not valid,
elijahsj 1:8a094db1347f 98 // OpenDrain = MXC_V_GPIO_OUT_MODE_OD,
elijahsj 1:8a094db1347f 99 // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL,
elijahsj 1:8a094db1347f 100 if (mode == OpenDrain) {
elijahsj 1:8a094db1347f 101 new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
elijahsj 1:8a094db1347f 102 } else {
elijahsj 1:8a094db1347f 103 new_mode = MXC_V_GPIO_OUT_MODE_NORMAL;
elijahsj 1:8a094db1347f 104 }
elijahsj 1:8a094db1347f 105 } else {
elijahsj 1:8a094db1347f 106 // PullUp = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP
elijahsj 1:8a094db1347f 107 // PullDown = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN
elijahsj 1:8a094db1347f 108 // OpenDrain = MXC_V_GPIO_OUT_MODE_OD
elijahsj 1:8a094db1347f 109 // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z
elijahsj 1:8a094db1347f 110 if (mode == PullUp) {
elijahsj 1:8a094db1347f 111 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP;
elijahsj 1:8a094db1347f 112 MXC_GPIO->out_val[port] |= 1 << pin;
elijahsj 1:8a094db1347f 113 } else if (mode == PullDown) {
elijahsj 1:8a094db1347f 114 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN;
elijahsj 1:8a094db1347f 115 MXC_GPIO->out_val[port] &= ~(1 << pin);
elijahsj 1:8a094db1347f 116 } else if (mode == OpenDrain) {
elijahsj 1:8a094db1347f 117 new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
elijahsj 1:8a094db1347f 118 MXC_GPIO->out_val[port] |= 1 << pin;
elijahsj 1:8a094db1347f 119 } else {
elijahsj 1:8a094db1347f 120 new_mode = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z;
elijahsj 1:8a094db1347f 121 MXC_GPIO->out_val[port] &= ~(1 << pin);
elijahsj 1:8a094db1347f 122 }
elijahsj 1:8a094db1347f 123 }
elijahsj 1:8a094db1347f 124
elijahsj 1:8a094db1347f 125 /* Set new mode */
elijahsj 1:8a094db1347f 126 uint32_t out_mode = MXC_GPIO->out_mode[port];
elijahsj 1:8a094db1347f 127 out_mode &= ~(0xF << (pin * 4));
elijahsj 1:8a094db1347f 128 out_mode |= (new_mode << (pin * 4));
elijahsj 1:8a094db1347f 129 MXC_GPIO->out_mode[port] = out_mode;
elijahsj 1:8a094db1347f 130 }
elijahsj 1:8a094db1347f 131
elijahsj 1:8a094db1347f 132 void gpio_dir(gpio_t *obj, PinDirection direction)
elijahsj 1:8a094db1347f 133 {
elijahsj 1:8a094db1347f 134 pin_dir_mode(obj->name, direction, obj->mode);
elijahsj 1:8a094db1347f 135 }