Amit Gandhi / mbed-dev

test

Fork of mbed-dev by mbed official

targets/hal/TARGET_Maxim/TARGET_MAX32600/pinmap.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /*******************************************************************************
bogdanm 0:9b334a45a8ff 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Permission is hereby granted, free of charge, to any person obtaining a
bogdanm 0:9b334a45a8ff 5 * copy of this software and associated documentation files (the "Software"),
bogdanm 0:9b334a45a8ff 6 * to deal in the Software without restriction, including without limitation
bogdanm 0:9b334a45a8ff 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
bogdanm 0:9b334a45a8ff 8 * and/or sell copies of the Software, and to permit persons to whom the
bogdanm 0:9b334a45a8ff 9 * Software is furnished to do so, subject to the following conditions:
bogdanm 0:9b334a45a8ff 10 *
bogdanm 0:9b334a45a8ff 11 * The above copyright notice and this permission notice shall be included
bogdanm 0:9b334a45a8ff 12 * in all copies or substantial portions of the Software.
bogdanm 0:9b334a45a8ff 13 *
bogdanm 0:9b334a45a8ff 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
bogdanm 0:9b334a45a8ff 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
bogdanm 0:9b334a45a8ff 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
bogdanm 0:9b334a45a8ff 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
bogdanm 0:9b334a45a8ff 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
bogdanm 0:9b334a45a8ff 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
bogdanm 0:9b334a45a8ff 20 * OTHER DEALINGS IN THE SOFTWARE.
bogdanm 0:9b334a45a8ff 21 *
bogdanm 0:9b334a45a8ff 22 * Except as contained in this notice, the name of Maxim Integrated
bogdanm 0:9b334a45a8ff 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
bogdanm 0:9b334a45a8ff 24 * Products, Inc. Branding Policy.
bogdanm 0:9b334a45a8ff 25 *
bogdanm 0:9b334a45a8ff 26 * The mere transfer of this software does not imply any licenses
bogdanm 0:9b334a45a8ff 27 * of trade secrets, proprietary technology, copyrights, patents,
bogdanm 0:9b334a45a8ff 28 * trademarks, maskwork rights, or any other form of intellectual
bogdanm 0:9b334a45a8ff 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
bogdanm 0:9b334a45a8ff 30 * ownership rights.
bogdanm 0:9b334a45a8ff 31 *******************************************************************************
bogdanm 0:9b334a45a8ff 32 */
bogdanm 0:9b334a45a8ff 33
bogdanm 0:9b334a45a8ff 34 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 35 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 36 #include "objects.h"
bogdanm 0:9b334a45a8ff 37 #include "gpio_regs.h"
bogdanm 0:9b334a45a8ff 38 #include "ioman_regs.h"
bogdanm 0:9b334a45a8ff 39
bogdanm 0:9b334a45a8ff 40 void pin_function(PinName name, int function)
bogdanm 0:9b334a45a8ff 41 {
bogdanm 0:9b334a45a8ff 42 MBED_ASSERT(name != (PinName)NC);
bogdanm 0:9b334a45a8ff 43
bogdanm 0:9b334a45a8ff 44 if ((function >= 0) && (function <= 0xF)) {
bogdanm 0:9b334a45a8ff 45 unsigned int port = PINNAME_TO_PORT(name);
bogdanm 0:9b334a45a8ff 46 unsigned int pin = PINNAME_TO_PIN(name);
bogdanm 0:9b334a45a8ff 47 uint32_t temp = MXC_GPIO->func_sel[port] & ~(0xF << (pin*4));
bogdanm 0:9b334a45a8ff 48 MXC_GPIO->func_sel[port] = temp | ((uint32_t)function << (pin*4));
bogdanm 0:9b334a45a8ff 49 } else {
bogdanm 0:9b334a45a8ff 50 /* Assume this is a pointer to a pin function object */
bogdanm 0:9b334a45a8ff 51 pin_function_t *obj = (pin_function_t*)function;
bogdanm 0:9b334a45a8ff 52
bogdanm 0:9b334a45a8ff 53 if ((*obj->reg_ack & obj->ack_mask) != obj->req_val) {
bogdanm 0:9b334a45a8ff 54 /* Request pin mapping */
bogdanm 0:9b334a45a8ff 55 *obj->reg_req |= obj->req_val;
bogdanm 0:9b334a45a8ff 56
bogdanm 0:9b334a45a8ff 57 /* Check for acknowledgment */
bogdanm 0:9b334a45a8ff 58 MBED_ASSERT((*obj->reg_ack & obj->ack_mask) == obj->req_val);
bogdanm 0:9b334a45a8ff 59 }
bogdanm 0:9b334a45a8ff 60 }
bogdanm 0:9b334a45a8ff 61 }
bogdanm 0:9b334a45a8ff 62
bogdanm 0:9b334a45a8ff 63 void pin_mode(PinName name, PinMode mode)
bogdanm 0:9b334a45a8ff 64 {
bogdanm 0:9b334a45a8ff 65 MBED_ASSERT(name != (PinName)NC);
bogdanm 0:9b334a45a8ff 66 unsigned int port = PINNAME_TO_PORT(name);
bogdanm 0:9b334a45a8ff 67 unsigned int pin = PINNAME_TO_PIN(name);
bogdanm 0:9b334a45a8ff 68
bogdanm 0:9b334a45a8ff 69 /* Must set mode while retaining direction */
bogdanm 0:9b334a45a8ff 70
bogdanm 0:9b334a45a8ff 71 /* Get the current direction */
bogdanm 0:9b334a45a8ff 72 uint32_t out_mode = MXC_GPIO->out_mode[port];
bogdanm 0:9b334a45a8ff 73 uint32_t curr_mode = (out_mode >> (pin*4)) & 0xF;
bogdanm 0:9b334a45a8ff 74 PinDirection dir = PIN_OUTPUT;
bogdanm 0:9b334a45a8ff 75 if ((curr_mode == MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP) || (curr_mode == MXC_V_GPIO_OUT_MODE_HIGH_Z)) {
bogdanm 0:9b334a45a8ff 76 dir = PIN_INPUT;
bogdanm 0:9b334a45a8ff 77 }
bogdanm 0:9b334a45a8ff 78
bogdanm 0:9b334a45a8ff 79 /* Set mode based on current direction */
bogdanm 0:9b334a45a8ff 80 uint32_t new_mode;
bogdanm 0:9b334a45a8ff 81 if (dir == PIN_OUTPUT) {
bogdanm 0:9b334a45a8ff 82 // PullUp = not valid,
bogdanm 0:9b334a45a8ff 83 // OpenDrain = MXC_V_GPIO_OUT_MODE_OD,
bogdanm 0:9b334a45a8ff 84 // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL,
bogdanm 0:9b334a45a8ff 85 if (mode == OpenDrain) {
bogdanm 0:9b334a45a8ff 86 new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
bogdanm 0:9b334a45a8ff 87 } else {
bogdanm 0:9b334a45a8ff 88 new_mode = MXC_V_GPIO_OUT_MODE_NORMAL_DRIVE;
bogdanm 0:9b334a45a8ff 89 }
bogdanm 0:9b334a45a8ff 90 } else {
bogdanm 0:9b334a45a8ff 91 // PullUp = MXC_V_GPIO_OUT_MODE_HIZPU,
bogdanm 0:9b334a45a8ff 92 // OpenDrain = not valid,
bogdanm 0:9b334a45a8ff 93 // PullNone = MXC_V_GPIO_OUT_MODE_HIZ,
bogdanm 0:9b334a45a8ff 94 if (mode == PullUp) {
bogdanm 0:9b334a45a8ff 95 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP;
bogdanm 0:9b334a45a8ff 96 } else {
bogdanm 0:9b334a45a8ff 97 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z;
bogdanm 0:9b334a45a8ff 98 }
bogdanm 0:9b334a45a8ff 99 }
bogdanm 0:9b334a45a8ff 100
bogdanm 0:9b334a45a8ff 101 /* Set new mode */
bogdanm 0:9b334a45a8ff 102 out_mode &= ~(0xF << (pin*4));
bogdanm 0:9b334a45a8ff 103 out_mode |= (new_mode << (pin*4));
bogdanm 0:9b334a45a8ff 104 MXC_GPIO->out_mode[port] = out_mode;
bogdanm 0:9b334a45a8ff 105 }