mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_Maxim/TARGET_MAX32620C/gpio_api.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
186:707f6e361f3e 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Anna Bridge 186:707f6e361f3e 1 /*******************************************************************************
Anna Bridge 186:707f6e361f3e 2 * Copyright (C) 2018 Maxim Integrated Products, Inc., All Rights Reserved.
Anna Bridge 186:707f6e361f3e 3 *
Anna Bridge 186:707f6e361f3e 4 * Permission is hereby granted, free of charge, to any person obtaining a
Anna Bridge 186:707f6e361f3e 5 * copy of this software and associated documentation files (the "Software"),
Anna Bridge 186:707f6e361f3e 6 * to deal in the Software without restriction, including without limitation
Anna Bridge 186:707f6e361f3e 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
Anna Bridge 186:707f6e361f3e 8 * and/or sell copies of the Software, and to permit persons to whom the
Anna Bridge 186:707f6e361f3e 9 * Software is furnished to do so, subject to the following conditions:
Anna Bridge 186:707f6e361f3e 10 *
Anna Bridge 186:707f6e361f3e 11 * The above copyright notice and this permission notice shall be included
Anna Bridge 186:707f6e361f3e 12 * in all copies or substantial portions of the Software.
Anna Bridge 186:707f6e361f3e 13 *
Anna Bridge 186:707f6e361f3e 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
Anna Bridge 186:707f6e361f3e 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
Anna Bridge 186:707f6e361f3e 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
Anna Bridge 186:707f6e361f3e 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
Anna Bridge 186:707f6e361f3e 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
Anna Bridge 186:707f6e361f3e 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
Anna Bridge 186:707f6e361f3e 20 * OTHER DEALINGS IN THE SOFTWARE.
Anna Bridge 186:707f6e361f3e 21 *
Anna Bridge 186:707f6e361f3e 22 * Except as contained in this notice, the name of Maxim Integrated
Anna Bridge 186:707f6e361f3e 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
Anna Bridge 186:707f6e361f3e 24 * Products, Inc. Branding Policy.
Anna Bridge 186:707f6e361f3e 25 *
Anna Bridge 186:707f6e361f3e 26 * The mere transfer of this software does not imply any licenses
Anna Bridge 186:707f6e361f3e 27 * of trade secrets, proprietary technology, copyrights, patents,
Anna Bridge 186:707f6e361f3e 28 * trademarks, maskwork rights, or any other form of intellectual
Anna Bridge 186:707f6e361f3e 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
Anna Bridge 186:707f6e361f3e 30 * ownership rights.
Anna Bridge 186:707f6e361f3e 31 *******************************************************************************
Anna Bridge 186:707f6e361f3e 32 */
Anna Bridge 186:707f6e361f3e 33
Anna Bridge 186:707f6e361f3e 34 #include "mbed_assert.h"
Anna Bridge 186:707f6e361f3e 35 #include "gpio_api.h"
Anna Bridge 186:707f6e361f3e 36 #include "pinmap.h"
Anna Bridge 186:707f6e361f3e 37 #include "gpio_regs.h"
Anna Bridge 186:707f6e361f3e 38 #include "clkman_regs.h"
Anna Bridge 186:707f6e361f3e 39
Anna Bridge 186:707f6e361f3e 40 uint32_t gpio_set(PinName name)
Anna Bridge 186:707f6e361f3e 41 {
Anna Bridge 186:707f6e361f3e 42 MBED_ASSERT(name != (PinName)NC);
Anna Bridge 186:707f6e361f3e 43 pin_function(name, 0);
Anna Bridge 186:707f6e361f3e 44 return 1 << PINNAME_TO_PIN(name);
Anna Bridge 186:707f6e361f3e 45 }
Anna Bridge 186:707f6e361f3e 46
Anna Bridge 186:707f6e361f3e 47 void gpio_init(gpio_t *obj, PinName name)
Anna Bridge 186:707f6e361f3e 48 {
Anna Bridge 186:707f6e361f3e 49 obj->name = name;
Anna Bridge 186:707f6e361f3e 50 if (name == (PinName)NC) {
Anna Bridge 186:707f6e361f3e 51 return;
Anna Bridge 186:707f6e361f3e 52 }
Anna Bridge 186:707f6e361f3e 53
Anna Bridge 186:707f6e361f3e 54 unsigned int port = PINNAME_TO_PORT(name);
Anna Bridge 186:707f6e361f3e 55 unsigned int pin = PINNAME_TO_PIN(name);
Anna Bridge 186:707f6e361f3e 56
Anna Bridge 186:707f6e361f3e 57 obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin);
Anna Bridge 186:707f6e361f3e 58 obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin);
Anna Bridge 186:707f6e361f3e 59 obj->mode = PullDefault;
Anna Bridge 186:707f6e361f3e 60
Anna Bridge 186:707f6e361f3e 61 /* Ensure that the GPIO clock is enabled */
Anna Bridge 186:707f6e361f3e 62 MXC_CLKMAN->clk_gate_ctrl1 |= MXC_F_CLKMAN_CLK_GATE_CTRL1_GPIO_CLK_GATER;
Anna Bridge 186:707f6e361f3e 63
Anna Bridge 186:707f6e361f3e 64 /* Ensure that the GPIO clock is enabled */
Anna Bridge 186:707f6e361f3e 65 MXC_CLKMAN->sys_clk_ctrl_6_gpio = MXC_S_CLKMAN_CLK_SCALE_DIV_1;
Anna Bridge 186:707f6e361f3e 66 }
Anna Bridge 186:707f6e361f3e 67
Anna Bridge 186:707f6e361f3e 68 void gpio_mode(gpio_t *obj, PinMode mode)
Anna Bridge 186:707f6e361f3e 69 {
Anna Bridge 186:707f6e361f3e 70 #ifdef OPEN_DRAIN_LEDS
Anna Bridge 186:707f6e361f3e 71 if ((obj->name == LED1) || (obj->name == LED2) ||
Anna Bridge 186:707f6e361f3e 72 (obj->name == LED3) || (obj->name == LED4)) {
Anna Bridge 186:707f6e361f3e 73 mode = OpenDrain;
Anna Bridge 186:707f6e361f3e 74 #ifdef TARGET_MAX32620FTHR
Anna Bridge 186:707f6e361f3e 75 unsigned int port = PINNAME_TO_PORT(obj->name);
Anna Bridge 186:707f6e361f3e 76 unsigned int pin = PINNAME_TO_PIN(obj->name);
Anna Bridge 186:707f6e361f3e 77 if (port < 4) {
Anna Bridge 186:707f6e361f3e 78 MXC_IOMAN->use_vddioh_0 |= (1 << ((port * 8) + pin));
Anna Bridge 186:707f6e361f3e 79 } else if (port < 7) {
Anna Bridge 186:707f6e361f3e 80 MXC_IOMAN->use_vddioh_1 |= (1 << (((port - 4) * 8) + pin));
Anna Bridge 186:707f6e361f3e 81 }
Anna Bridge 186:707f6e361f3e 82 #endif
Anna Bridge 186:707f6e361f3e 83 }
Anna Bridge 186:707f6e361f3e 84 #endif
Anna Bridge 186:707f6e361f3e 85
Anna Bridge 186:707f6e361f3e 86 obj->mode = mode;
Anna Bridge 186:707f6e361f3e 87 pin_mode(obj->name, mode);
Anna Bridge 186:707f6e361f3e 88 }
Anna Bridge 186:707f6e361f3e 89
Anna Bridge 186:707f6e361f3e 90 void pin_dir_mode(PinName name, PinDirection direction, PinMode mode)
Anna Bridge 186:707f6e361f3e 91 {
Anna Bridge 186:707f6e361f3e 92 MBED_ASSERT(name != (PinName)NC);
Anna Bridge 186:707f6e361f3e 93
Anna Bridge 186:707f6e361f3e 94 unsigned int port = PINNAME_TO_PORT(name);
Anna Bridge 186:707f6e361f3e 95 unsigned int pin = PINNAME_TO_PIN(name);
Anna Bridge 186:707f6e361f3e 96
Anna Bridge 186:707f6e361f3e 97 /* Set function; Firmware Control (GPIO mode) */
Anna Bridge 186:707f6e361f3e 98 MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin));
Anna Bridge 186:707f6e361f3e 99
Anna Bridge 186:707f6e361f3e 100 /* Normal input is always enabled */
Anna Bridge 186:707f6e361f3e 101 MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin));
Anna Bridge 186:707f6e361f3e 102
Anna Bridge 186:707f6e361f3e 103 uint32_t new_mode;
Anna Bridge 186:707f6e361f3e 104 if (direction == PIN_OUTPUT) {
Anna Bridge 186:707f6e361f3e 105 // PullUp = not valid,
Anna Bridge 186:707f6e361f3e 106 // PullDown = not valid,
Anna Bridge 186:707f6e361f3e 107 // OpenDrain = MXC_V_GPIO_OUT_MODE_OD,
Anna Bridge 186:707f6e361f3e 108 // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL,
Anna Bridge 186:707f6e361f3e 109 if (mode == OpenDrain) {
Anna Bridge 186:707f6e361f3e 110 new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
Anna Bridge 186:707f6e361f3e 111 } else {
Anna Bridge 186:707f6e361f3e 112 new_mode = MXC_V_GPIO_OUT_MODE_NORMAL;
Anna Bridge 186:707f6e361f3e 113 }
Anna Bridge 186:707f6e361f3e 114 } else {
Anna Bridge 186:707f6e361f3e 115 // PullUp = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP
Anna Bridge 186:707f6e361f3e 116 // PullDown = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN
Anna Bridge 186:707f6e361f3e 117 // OpenDrain = MXC_V_GPIO_OUT_MODE_OD
Anna Bridge 186:707f6e361f3e 118 // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z
Anna Bridge 186:707f6e361f3e 119 if (mode == PullUp) {
Anna Bridge 186:707f6e361f3e 120 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP;
Anna Bridge 186:707f6e361f3e 121 MXC_GPIO->out_val[port] |= 1 << pin;
Anna Bridge 186:707f6e361f3e 122 } else if (mode == PullDown) {
Anna Bridge 186:707f6e361f3e 123 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN;
Anna Bridge 186:707f6e361f3e 124 MXC_GPIO->out_val[port] &= ~(1 << pin);
Anna Bridge 186:707f6e361f3e 125 } else if (mode == OpenDrain) {
Anna Bridge 186:707f6e361f3e 126 new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
Anna Bridge 186:707f6e361f3e 127 MXC_GPIO->out_val[port] |= 1 << pin;
Anna Bridge 186:707f6e361f3e 128 } else {
Anna Bridge 186:707f6e361f3e 129 new_mode = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z;
Anna Bridge 186:707f6e361f3e 130 MXC_GPIO->out_val[port] &= ~(1 << pin);
Anna Bridge 186:707f6e361f3e 131 }
Anna Bridge 186:707f6e361f3e 132 }
Anna Bridge 186:707f6e361f3e 133
Anna Bridge 186:707f6e361f3e 134 /* Set new mode */
Anna Bridge 186:707f6e361f3e 135 uint32_t out_mode = MXC_GPIO->out_mode[port];
Anna Bridge 186:707f6e361f3e 136 out_mode &= ~(0xF << (pin * 4));
Anna Bridge 186:707f6e361f3e 137 out_mode |= (new_mode << (pin * 4));
Anna Bridge 186:707f6e361f3e 138 MXC_GPIO->out_mode[port] = out_mode;
Anna Bridge 186:707f6e361f3e 139 }
Anna Bridge 186:707f6e361f3e 140
Anna Bridge 186:707f6e361f3e 141 void gpio_dir(gpio_t *obj, PinDirection direction)
Anna Bridge 186:707f6e361f3e 142 {
Anna Bridge 186:707f6e361f3e 143 pin_dir_mode(obj->name, direction, obj->mode);
Anna Bridge 186:707f6e361f3e 144 }