Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Maxim/TARGET_MAX32610/pinmap.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /*******************************************************************************
<> 144:ef7eb2e8f9f7 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Permission is hereby granted, free of charge, to any person obtaining a
<> 144:ef7eb2e8f9f7 5 * copy of this software and associated documentation files (the "Software"),
<> 144:ef7eb2e8f9f7 6 * to deal in the Software without restriction, including without limitation
<> 144:ef7eb2e8f9f7 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
<> 144:ef7eb2e8f9f7 8 * and/or sell copies of the Software, and to permit persons to whom the
<> 144:ef7eb2e8f9f7 9 * Software is furnished to do so, subject to the following conditions:
<> 144:ef7eb2e8f9f7 10 *
<> 144:ef7eb2e8f9f7 11 * The above copyright notice and this permission notice shall be included
<> 144:ef7eb2e8f9f7 12 * in all copies or substantial portions of the Software.
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
<> 144:ef7eb2e8f9f7 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
<> 144:ef7eb2e8f9f7 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
<> 144:ef7eb2e8f9f7 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
<> 144:ef7eb2e8f9f7 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
<> 144:ef7eb2e8f9f7 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
<> 144:ef7eb2e8f9f7 20 * OTHER DEALINGS IN THE SOFTWARE.
<> 144:ef7eb2e8f9f7 21 *
<> 144:ef7eb2e8f9f7 22 * Except as contained in this notice, the name of Maxim Integrated
<> 144:ef7eb2e8f9f7 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
<> 144:ef7eb2e8f9f7 24 * Products, Inc. Branding Policy.
<> 144:ef7eb2e8f9f7 25 *
<> 144:ef7eb2e8f9f7 26 * The mere transfer of this software does not imply any licenses
<> 144:ef7eb2e8f9f7 27 * of trade secrets, proprietary technology, copyrights, patents,
<> 144:ef7eb2e8f9f7 28 * trademarks, maskwork rights, or any other form of intellectual
<> 144:ef7eb2e8f9f7 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
<> 144:ef7eb2e8f9f7 30 * ownership rights.
<> 144:ef7eb2e8f9f7 31 *******************************************************************************
<> 144:ef7eb2e8f9f7 32 */
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 35 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 36 #include "objects.h"
<> 144:ef7eb2e8f9f7 37 #include "gpio_regs.h"
<> 144:ef7eb2e8f9f7 38 #include "ioman_regs.h"
<> 144:ef7eb2e8f9f7 39
<> 144:ef7eb2e8f9f7 40 void pin_function(PinName name, int function)
<> 144:ef7eb2e8f9f7 41 {
<> 144:ef7eb2e8f9f7 42 MBED_ASSERT(name != (PinName)NC);
<> 144:ef7eb2e8f9f7 43
<> 144:ef7eb2e8f9f7 44 if ((function >= 0) && (function <= 0xF)) {
<> 144:ef7eb2e8f9f7 45 unsigned int port = PINNAME_TO_PORT(name);
<> 144:ef7eb2e8f9f7 46 unsigned int pin = PINNAME_TO_PIN(name);
<> 144:ef7eb2e8f9f7 47 uint32_t temp = MXC_GPIO->func_sel[port] & ~(0xF << (pin*4));
<> 144:ef7eb2e8f9f7 48 MXC_GPIO->func_sel[port] = temp | ((uint32_t)function << (pin*4));
<> 144:ef7eb2e8f9f7 49 } else {
<> 144:ef7eb2e8f9f7 50 /* Assume this is a pointer to a pin function object */
<> 144:ef7eb2e8f9f7 51 pin_function_t *obj = (pin_function_t*)function;
<> 144:ef7eb2e8f9f7 52
<> 144:ef7eb2e8f9f7 53 if ((*obj->reg_ack & obj->ack_mask) != obj->req_val) {
<> 144:ef7eb2e8f9f7 54 /* Request pin mapping */
<> 144:ef7eb2e8f9f7 55 *obj->reg_req |= obj->req_val;
<> 144:ef7eb2e8f9f7 56
<> 144:ef7eb2e8f9f7 57 /* Check for acknowledgment */
<> 144:ef7eb2e8f9f7 58 MBED_ASSERT((*obj->reg_ack & obj->ack_mask) == obj->req_val);
<> 144:ef7eb2e8f9f7 59 }
<> 144:ef7eb2e8f9f7 60 }
<> 144:ef7eb2e8f9f7 61 }
<> 144:ef7eb2e8f9f7 62
<> 144:ef7eb2e8f9f7 63 void pin_mode(PinName name, PinMode mode)
<> 144:ef7eb2e8f9f7 64 {
<> 144:ef7eb2e8f9f7 65 MBED_ASSERT(name != (PinName)NC);
<> 144:ef7eb2e8f9f7 66 unsigned int port = PINNAME_TO_PORT(name);
<> 144:ef7eb2e8f9f7 67 unsigned int pin = PINNAME_TO_PIN(name);
<> 144:ef7eb2e8f9f7 68
<> 144:ef7eb2e8f9f7 69 /* Must set mode while retaining direction */
<> 144:ef7eb2e8f9f7 70
<> 144:ef7eb2e8f9f7 71 /* Get the current direction */
<> 144:ef7eb2e8f9f7 72 uint32_t out_mode = MXC_GPIO->out_mode[port];
<> 144:ef7eb2e8f9f7 73 uint32_t curr_mode = (out_mode >> (pin*4)) & 0xF;
<> 144:ef7eb2e8f9f7 74 PinDirection dir = PIN_OUTPUT;
<> 144:ef7eb2e8f9f7 75 if ((curr_mode == MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP) || (curr_mode == MXC_V_GPIO_OUT_MODE_HIGH_Z)) {
<> 144:ef7eb2e8f9f7 76 dir = PIN_INPUT;
<> 144:ef7eb2e8f9f7 77 }
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79 /* Set mode based on current direction */
<> 144:ef7eb2e8f9f7 80 uint32_t new_mode;
<> 144:ef7eb2e8f9f7 81 if (dir == PIN_OUTPUT) {
<> 144:ef7eb2e8f9f7 82 // PullUp = not valid,
<> 144:ef7eb2e8f9f7 83 // OpenDrain = MXC_V_GPIO_OUT_MODE_OD,
<> 144:ef7eb2e8f9f7 84 // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL,
<> 144:ef7eb2e8f9f7 85 if (mode == OpenDrain) {
<> 144:ef7eb2e8f9f7 86 new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
<> 144:ef7eb2e8f9f7 87 } else {
<> 144:ef7eb2e8f9f7 88 new_mode = MXC_V_GPIO_OUT_MODE_NORMAL_DRIVE;
<> 144:ef7eb2e8f9f7 89 }
<> 144:ef7eb2e8f9f7 90 } else {
<> 144:ef7eb2e8f9f7 91 // PullUp = MXC_V_GPIO_OUT_MODE_HIZPU,
<> 144:ef7eb2e8f9f7 92 // OpenDrain = not valid,
<> 144:ef7eb2e8f9f7 93 // PullNone = MXC_V_GPIO_OUT_MODE_HIZ,
<> 144:ef7eb2e8f9f7 94 if (mode == PullUp) {
<> 144:ef7eb2e8f9f7 95 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP;
<> 144:ef7eb2e8f9f7 96 } else {
<> 144:ef7eb2e8f9f7 97 new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z;
<> 144:ef7eb2e8f9f7 98 }
<> 144:ef7eb2e8f9f7 99 }
<> 144:ef7eb2e8f9f7 100
<> 144:ef7eb2e8f9f7 101 /* Set new mode */
<> 144:ef7eb2e8f9f7 102 out_mode &= ~(0xF << (pin*4));
<> 144:ef7eb2e8f9f7 103 out_mode |= (new_mode << (pin*4));
<> 144:ef7eb2e8f9f7 104 MXC_GPIO->out_mode[port] = out_mode;
<> 144:ef7eb2e8f9f7 105 }