Cortney Padua / mbed-dev

fixed drive strength

Dependents:   capstone_i2c

Fork of mbed-dev by mbed official

targets/TARGET_Maxim/TARGET_MAX32620/pinmap.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 "pinmap.h"
<> 149:156823d33999 36 #include "objects.h"
<> 149:156823d33999 37 #include "gpio_regs.h"
<> 149:156823d33999 38 #include "ioman_regs.h"
<> 149:156823d33999 39
<> 149:156823d33999 40 void pin_function(PinName name, int function)
<> 149:156823d33999 41 {
<> 149:156823d33999 42 MBED_ASSERT(name != (PinName)NC);
<> 149:156823d33999 43
<> 149:156823d33999 44 if ((function >= 0) && (function <= 0xF)) {
<> 149:156823d33999 45 unsigned int port = PINNAME_TO_PORT(name);
<> 149:156823d33999 46 unsigned int pin = PINNAME_TO_PIN(name);
<> 149:156823d33999 47 uint32_t temp = MXC_GPIO->func_sel[port] & ~(0xF << (pin*4));
<> 149:156823d33999 48 MXC_GPIO->func_sel[port] = temp | ((uint32_t)function << (pin*4));
<> 149:156823d33999 49 } else {
<> 149:156823d33999 50 /* Assume this is a pointer to a pin function object */
<> 149:156823d33999 51 pin_function_t *obj = (pin_function_t*)function;
<> 149:156823d33999 52
<> 149:156823d33999 53 if ((*obj->reg_ack & obj->ack_mask) != obj->req_val) {
<> 149:156823d33999 54 /* Request pin mapping */
<> 149:156823d33999 55 *obj->reg_req |= obj->req_val;
<> 149:156823d33999 56
<> 149:156823d33999 57 /* Check for acknowledgment */
<> 149:156823d33999 58 MBED_ASSERT((*obj->reg_ack & obj->ack_mask) == obj->req_val);
<> 149:156823d33999 59 }
<> 149:156823d33999 60 }
<> 149:156823d33999 61 }
<> 149:156823d33999 62
<> 149:156823d33999 63 void pin_mode(PinName name, PinMode mode)
<> 149:156823d33999 64 {
<> 149:156823d33999 65 MBED_ASSERT(name != (PinName)NC);
<> 149:156823d33999 66 unsigned int port = PINNAME_TO_PORT(name);
<> 149:156823d33999 67 unsigned int pin = PINNAME_TO_PIN(name);
<> 149:156823d33999 68
<> 149:156823d33999 69 /* Must set mode while retaining direction */
<> 149:156823d33999 70
<> 149:156823d33999 71 /* Get the current direction */
<> 149:156823d33999 72 uint32_t out_mode = MXC_GPIO->out_mode[port];
<> 149:156823d33999 73 uint32_t curr_mode = (out_mode >> (pin * 4)) & 0xF;
<> 149:156823d33999 74 PinDirection dir = PIN_OUTPUT;
<> 149:156823d33999 75 if ((curr_mode == MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP) ||
<> 149:156823d33999 76 (curr_mode == MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN) ||
<> 149:156823d33999 77 (curr_mode == MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z)) {
<> 149:156823d33999 78 dir = PIN_INPUT;
<> 149:156823d33999 79 }
<> 149:156823d33999 80
<> 149:156823d33999 81 /* Set mode based on current direction */
<> 149:156823d33999 82 uint32_t new_mode;
<> 149:156823d33999 83 if (dir == PIN_OUTPUT) {
<> 149:156823d33999 84 // PullUp = not valid,
<> 149:156823d33999 85 // PullDown = not valid,
<> 149:156823d33999 86 // OpenDrain = MXC_V_GPIO_OUT_MODE_OD,
<> 149:156823d33999 87 // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL,
<> 149:156823d33999 88 if (mode == OpenDrain) {
<> 149:156823d33999 89 new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
<> 149:156823d33999 90 } else {
<> 149:156823d33999 91 new_mode = MXC_V_GPIO_OUT_MODE_NORMAL;
<> 149:156823d33999 92 }
<> 149:156823d33999 93 } else {
<> 149:156823d33999 94 // PullUp = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP
<> 149:156823d33999 95 // PullDown = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN
<> 149:156823d33999 96 // OpenDrain = MXC_V_GPIO_OUT_MODE_OD
<> 149:156823d33999 97 // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z
<> 149:156823d33999 98 if (mode == PullUp) {
<> 149:156823d33999 99 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP;
<> 149:156823d33999 100 MXC_GPIO->out_val[port] |= 1 << pin;
<> 149:156823d33999 101 } else if (mode == PullDown) {
<> 149:156823d33999 102 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN;
<> 149:156823d33999 103 MXC_GPIO->out_val[port] &= ~(1 << pin);
<> 149:156823d33999 104 } else if (mode == OpenDrain) {
<> 149:156823d33999 105 new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
<> 149:156823d33999 106 MXC_GPIO->out_val[port] |= 1 << pin;
<> 149:156823d33999 107 } else {
<> 149:156823d33999 108 new_mode = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z;
<> 149:156823d33999 109 MXC_GPIO->out_val[port] &= ~(1 << pin);
<> 149:156823d33999 110 }
<> 149:156823d33999 111 }
<> 149:156823d33999 112
<> 149:156823d33999 113 /* Set new mode */
<> 149:156823d33999 114 out_mode &= ~(0xF << (pin * 4));
<> 149:156823d33999 115 out_mode |= (new_mode << (pin * 4));
<> 149:156823d33999 116 MXC_GPIO->out_mode[port] = out_mode;
<> 149:156823d33999 117 }