Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

common/CAN.cpp@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 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "CAN.h"
<> 144:ef7eb2e8f9f7 17
<> 144:ef7eb2e8f9f7 18 #if DEVICE_CAN
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 21
<> 144:ef7eb2e8f9f7 22 namespace mbed {
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 CAN::CAN(PinName rd, PinName td) : _can(), _irq() {
<> 144:ef7eb2e8f9f7 25 // No lock needed in constructor
<> 144:ef7eb2e8f9f7 26 can_init(&_can, rd, td);
<> 144:ef7eb2e8f9f7 27 can_irq_init(&_can, (&CAN::_irq_handler), (uint32_t)this);
<> 144:ef7eb2e8f9f7 28 }
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30 CAN::~CAN() {
<> 144:ef7eb2e8f9f7 31 // No lock needed in destructor
<> 144:ef7eb2e8f9f7 32 can_irq_free(&_can);
<> 144:ef7eb2e8f9f7 33 can_free(&_can);
<> 144:ef7eb2e8f9f7 34 }
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 int CAN::frequency(int f) {
<> 144:ef7eb2e8f9f7 37 lock();
<> 144:ef7eb2e8f9f7 38 int ret = can_frequency(&_can, f);
<> 144:ef7eb2e8f9f7 39 unlock();
<> 144:ef7eb2e8f9f7 40 return ret;
<> 144:ef7eb2e8f9f7 41 }
<> 144:ef7eb2e8f9f7 42
<> 144:ef7eb2e8f9f7 43 int CAN::write(CANMessage msg) {
<> 144:ef7eb2e8f9f7 44 lock();
<> 144:ef7eb2e8f9f7 45 int ret = can_write(&_can, msg, 0);
<> 144:ef7eb2e8f9f7 46 unlock();
<> 144:ef7eb2e8f9f7 47 return ret;
<> 144:ef7eb2e8f9f7 48 }
<> 144:ef7eb2e8f9f7 49
<> 144:ef7eb2e8f9f7 50 int CAN::read(CANMessage &msg, int handle) {
<> 144:ef7eb2e8f9f7 51 lock();
<> 144:ef7eb2e8f9f7 52 int ret = can_read(&_can, &msg, handle);
<> 144:ef7eb2e8f9f7 53 unlock();
<> 144:ef7eb2e8f9f7 54 return ret;
<> 144:ef7eb2e8f9f7 55 }
<> 144:ef7eb2e8f9f7 56
<> 144:ef7eb2e8f9f7 57 void CAN::reset() {
<> 144:ef7eb2e8f9f7 58 lock();
<> 144:ef7eb2e8f9f7 59 can_reset(&_can);
<> 144:ef7eb2e8f9f7 60 unlock();
<> 144:ef7eb2e8f9f7 61 }
<> 144:ef7eb2e8f9f7 62
<> 144:ef7eb2e8f9f7 63 unsigned char CAN::rderror() {
<> 144:ef7eb2e8f9f7 64 lock();
<> 144:ef7eb2e8f9f7 65 int ret = can_rderror(&_can);
<> 144:ef7eb2e8f9f7 66 unlock();
<> 144:ef7eb2e8f9f7 67 return ret;
<> 144:ef7eb2e8f9f7 68 }
<> 144:ef7eb2e8f9f7 69
<> 144:ef7eb2e8f9f7 70 unsigned char CAN::tderror() {
<> 144:ef7eb2e8f9f7 71 lock();
<> 144:ef7eb2e8f9f7 72 int ret = can_tderror(&_can);
<> 144:ef7eb2e8f9f7 73 unlock();
<> 144:ef7eb2e8f9f7 74 return ret;
<> 144:ef7eb2e8f9f7 75 }
<> 144:ef7eb2e8f9f7 76
<> 144:ef7eb2e8f9f7 77 void CAN::monitor(bool silent) {
<> 144:ef7eb2e8f9f7 78 lock();
<> 144:ef7eb2e8f9f7 79 can_monitor(&_can, (silent) ? 1 : 0);
<> 144:ef7eb2e8f9f7 80 unlock();
<> 144:ef7eb2e8f9f7 81 }
<> 144:ef7eb2e8f9f7 82
<> 144:ef7eb2e8f9f7 83 int CAN::mode(Mode mode) {
<> 144:ef7eb2e8f9f7 84 lock();
<> 144:ef7eb2e8f9f7 85 int ret = can_mode(&_can, (CanMode)mode);
<> 144:ef7eb2e8f9f7 86 unlock();
<> 144:ef7eb2e8f9f7 87 return ret;
<> 144:ef7eb2e8f9f7 88 }
<> 144:ef7eb2e8f9f7 89
<> 144:ef7eb2e8f9f7 90 int CAN::filter(unsigned int id, unsigned int mask, CANFormat format, int handle) {
<> 144:ef7eb2e8f9f7 91 lock();
<> 144:ef7eb2e8f9f7 92 int ret = can_filter(&_can, id, mask, format, handle);
<> 144:ef7eb2e8f9f7 93 unlock();
<> 144:ef7eb2e8f9f7 94 return ret;
<> 144:ef7eb2e8f9f7 95 }
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97 void CAN::attach(Callback<void()> func, IrqType type) {
<> 144:ef7eb2e8f9f7 98 lock();
<> 144:ef7eb2e8f9f7 99 if (func) {
<> 144:ef7eb2e8f9f7 100 _irq[(CanIrqType)type].attach(func);
<> 144:ef7eb2e8f9f7 101 can_irq_set(&_can, (CanIrqType)type, 1);
<> 144:ef7eb2e8f9f7 102 } else {
<> 144:ef7eb2e8f9f7 103 can_irq_set(&_can, (CanIrqType)type, 0);
<> 144:ef7eb2e8f9f7 104 }
<> 144:ef7eb2e8f9f7 105 unlock();
<> 144:ef7eb2e8f9f7 106 }
<> 144:ef7eb2e8f9f7 107
<> 144:ef7eb2e8f9f7 108 void CAN::_irq_handler(uint32_t id, CanIrqType type) {
<> 144:ef7eb2e8f9f7 109 CAN *handler = (CAN*)id;
<> 144:ef7eb2e8f9f7 110 handler->_irq[type].call();
<> 144:ef7eb2e8f9f7 111 }
<> 144:ef7eb2e8f9f7 112
<> 144:ef7eb2e8f9f7 113 void CAN::lock() {
<> 144:ef7eb2e8f9f7 114 _mutex.lock();
<> 144:ef7eb2e8f9f7 115 }
<> 144:ef7eb2e8f9f7 116
<> 144:ef7eb2e8f9f7 117 void CAN::unlock() {
<> 144:ef7eb2e8f9f7 118 _mutex.unlock();
<> 144:ef7eb2e8f9f7 119 }
<> 144:ef7eb2e8f9f7 120
<> 144:ef7eb2e8f9f7 121 } // namespace mbed
<> 144:ef7eb2e8f9f7 122
<> 144:ef7eb2e8f9f7 123 #endif