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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

cpp/CAN.cpp@0:fd0d7bdfcdc2, 2012-11-20 (annotated)

Committer:
mbed_official
Date:
Tue Nov 20 17:24:08 2012 +0000
Revision:
0:fd0d7bdfcdc2
Child:
2:143cac498751
mbed sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
mbed_official 0:fd0d7bdfcdc2 2 * Copyright (c) 2006-2012 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
mbed_official 0:fd0d7bdfcdc2 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mbed_official 0:fd0d7bdfcdc2 5 * of this software and associated documentation files (the "Software"), to deal
mbed_official 0:fd0d7bdfcdc2 6 * in the Software without restriction, including without limitation the rights
mbed_official 0:fd0d7bdfcdc2 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mbed_official 0:fd0d7bdfcdc2 8 * copies of the Software, and to permit persons to whom the Software is
mbed_official 0:fd0d7bdfcdc2 9 * furnished to do so, subject to the following conditions:
mbed_official 0:fd0d7bdfcdc2 10 *
mbed_official 0:fd0d7bdfcdc2 11 * The above copyright notice and this permission notice shall be included in
mbed_official 0:fd0d7bdfcdc2 12 * all copies or substantial portions of the Software.
mbed_official 0:fd0d7bdfcdc2 13 *
mbed_official 0:fd0d7bdfcdc2 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mbed_official 0:fd0d7bdfcdc2 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mbed_official 0:fd0d7bdfcdc2 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mbed_official 0:fd0d7bdfcdc2 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mbed_official 0:fd0d7bdfcdc2 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mbed_official 0:fd0d7bdfcdc2 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mbed_official 0:fd0d7bdfcdc2 20 * SOFTWARE.
mbed_official 0:fd0d7bdfcdc2 21 */
mbed_official 0:fd0d7bdfcdc2 22 #include "CAN.h"
mbed_official 0:fd0d7bdfcdc2 23
mbed_official 0:fd0d7bdfcdc2 24 #if DEVICE_CAN
mbed_official 0:fd0d7bdfcdc2 25
mbed_official 0:fd0d7bdfcdc2 26 #include "cmsis.h"
mbed_official 0:fd0d7bdfcdc2 27
mbed_official 0:fd0d7bdfcdc2 28 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 29
mbed_official 0:fd0d7bdfcdc2 30 CAN::CAN(PinName rd, PinName td) {
mbed_official 0:fd0d7bdfcdc2 31 can_init(&_can, rd, td);
mbed_official 0:fd0d7bdfcdc2 32 }
mbed_official 0:fd0d7bdfcdc2 33
mbed_official 0:fd0d7bdfcdc2 34 CAN::~CAN() {
mbed_official 0:fd0d7bdfcdc2 35 can_free(&_can);
mbed_official 0:fd0d7bdfcdc2 36 }
mbed_official 0:fd0d7bdfcdc2 37
mbed_official 0:fd0d7bdfcdc2 38 int CAN::frequency(int f) {
mbed_official 0:fd0d7bdfcdc2 39 return can_frequency(&_can, f);
mbed_official 0:fd0d7bdfcdc2 40 }
mbed_official 0:fd0d7bdfcdc2 41
mbed_official 0:fd0d7bdfcdc2 42 int CAN::write(CANMessage msg) {
mbed_official 0:fd0d7bdfcdc2 43 return can_write(&_can, msg, 0);
mbed_official 0:fd0d7bdfcdc2 44 }
mbed_official 0:fd0d7bdfcdc2 45
mbed_official 0:fd0d7bdfcdc2 46 int CAN::read(CANMessage &msg) {
mbed_official 0:fd0d7bdfcdc2 47 return can_read(&_can, &msg);
mbed_official 0:fd0d7bdfcdc2 48 }
mbed_official 0:fd0d7bdfcdc2 49
mbed_official 0:fd0d7bdfcdc2 50 void CAN::reset() {
mbed_official 0:fd0d7bdfcdc2 51 can_reset(&_can);
mbed_official 0:fd0d7bdfcdc2 52 }
mbed_official 0:fd0d7bdfcdc2 53
mbed_official 0:fd0d7bdfcdc2 54 unsigned char CAN::rderror() {
mbed_official 0:fd0d7bdfcdc2 55 return can_rderror(&_can);
mbed_official 0:fd0d7bdfcdc2 56 }
mbed_official 0:fd0d7bdfcdc2 57
mbed_official 0:fd0d7bdfcdc2 58 unsigned char CAN::tderror() {
mbed_official 0:fd0d7bdfcdc2 59 return can_tderror(&_can);
mbed_official 0:fd0d7bdfcdc2 60 }
mbed_official 0:fd0d7bdfcdc2 61
mbed_official 0:fd0d7bdfcdc2 62 void CAN::monitor(bool silent) {
mbed_official 0:fd0d7bdfcdc2 63 can_monitor(&_can, (silent) ? 1 : 0);
mbed_official 0:fd0d7bdfcdc2 64 }
mbed_official 0:fd0d7bdfcdc2 65
mbed_official 0:fd0d7bdfcdc2 66 static FunctionPointer* can_obj[2] = { NULL };
mbed_official 0:fd0d7bdfcdc2 67
mbed_official 0:fd0d7bdfcdc2 68 // Have to check that the CAN block is active before reading the Interrupt
mbed_official 0:fd0d7bdfcdc2 69 // Control Register, or the mbed hangs
mbed_official 0:fd0d7bdfcdc2 70 void can_irq(void) {
mbed_official 0:fd0d7bdfcdc2 71 uint32_t icr;
mbed_official 0:fd0d7bdfcdc2 72
mbed_official 0:fd0d7bdfcdc2 73 if(LPC_SC->PCONP & (1 << 13)) {
mbed_official 0:fd0d7bdfcdc2 74 icr = LPC_CAN1->ICR;
mbed_official 0:fd0d7bdfcdc2 75
mbed_official 0:fd0d7bdfcdc2 76 if(icr && (can_obj[0] != NULL)) {
mbed_official 0:fd0d7bdfcdc2 77 can_obj[0]->call();
mbed_official 0:fd0d7bdfcdc2 78 }
mbed_official 0:fd0d7bdfcdc2 79 }
mbed_official 0:fd0d7bdfcdc2 80
mbed_official 0:fd0d7bdfcdc2 81 if(LPC_SC->PCONP & (1 << 14)) {
mbed_official 0:fd0d7bdfcdc2 82 icr = LPC_CAN2->ICR;
mbed_official 0:fd0d7bdfcdc2 83 if(icr && (can_obj[1] != NULL)) {
mbed_official 0:fd0d7bdfcdc2 84 can_obj[1]->call();
mbed_official 0:fd0d7bdfcdc2 85 }
mbed_official 0:fd0d7bdfcdc2 86 }
mbed_official 0:fd0d7bdfcdc2 87
mbed_official 0:fd0d7bdfcdc2 88 }
mbed_official 0:fd0d7bdfcdc2 89
mbed_official 0:fd0d7bdfcdc2 90 void CAN::setup_interrupt(void) {
mbed_official 0:fd0d7bdfcdc2 91 switch ((int)_can.dev) {
mbed_official 0:fd0d7bdfcdc2 92 case CAN_1: can_obj[0] = &_rxirq; break;
mbed_official 0:fd0d7bdfcdc2 93 case CAN_2: can_obj[1] = &_rxirq; break;
mbed_official 0:fd0d7bdfcdc2 94 }
mbed_official 0:fd0d7bdfcdc2 95 _can.dev->MOD |= 1;
mbed_official 0:fd0d7bdfcdc2 96 _can.dev->IER |= 1;
mbed_official 0:fd0d7bdfcdc2 97 _can.dev->MOD &= ~1;
mbed_official 0:fd0d7bdfcdc2 98 NVIC_SetVector(CAN_IRQn, (uint32_t) &can_irq);
mbed_official 0:fd0d7bdfcdc2 99 NVIC_EnableIRQ(CAN_IRQn);
mbed_official 0:fd0d7bdfcdc2 100 }
mbed_official 0:fd0d7bdfcdc2 101
mbed_official 0:fd0d7bdfcdc2 102 void CAN::remove_interrupt(void) {
mbed_official 0:fd0d7bdfcdc2 103 switch ((int)_can.dev) {
mbed_official 0:fd0d7bdfcdc2 104 case CAN_1: can_obj[0] = NULL; break;
mbed_official 0:fd0d7bdfcdc2 105 case CAN_2: can_obj[1] = NULL; break;
mbed_official 0:fd0d7bdfcdc2 106 }
mbed_official 0:fd0d7bdfcdc2 107
mbed_official 0:fd0d7bdfcdc2 108 _can.dev->IER &= ~(1);
mbed_official 0:fd0d7bdfcdc2 109 if ((can_obj[0] == NULL) && (can_obj[1] == NULL)) {
mbed_official 0:fd0d7bdfcdc2 110 NVIC_DisableIRQ(CAN_IRQn);
mbed_official 0:fd0d7bdfcdc2 111 }
mbed_official 0:fd0d7bdfcdc2 112 }
mbed_official 0:fd0d7bdfcdc2 113
mbed_official 0:fd0d7bdfcdc2 114 void CAN::attach(void (*fptr)(void)) {
mbed_official 0:fd0d7bdfcdc2 115 if (fptr != NULL) {
mbed_official 0:fd0d7bdfcdc2 116 _rxirq.attach(fptr);
mbed_official 0:fd0d7bdfcdc2 117 setup_interrupt();
mbed_official 0:fd0d7bdfcdc2 118 } else {
mbed_official 0:fd0d7bdfcdc2 119 remove_interrupt();
mbed_official 0:fd0d7bdfcdc2 120 }
mbed_official 0:fd0d7bdfcdc2 121 }
mbed_official 0:fd0d7bdfcdc2 122
mbed_official 0:fd0d7bdfcdc2 123 } // namespace mbed
mbed_official 0:fd0d7bdfcdc2 124
mbed_official 0:fd0d7bdfcdc2 125 #endif