Arran SHORT / Mbed 2 deprecated MTS_TO_MSCAN

Innovate MTS to Megasquirt MSCAN

Dependencies:   CANnucleo mbed

Fork of CANnucleo_Hello by Zoltan Hudak

INNOVATE MTS SERIAL STREAM TO MEGASQUIRT MSCAN ANALOG

This was tested on the olimex olimexino-stm32. code comes with no warrenty, always confirm AFR readings at the device.

I haven't tested this on an ECU or with an LM2 yet this has all been done with simulations, so there may be real world bugs.

code was based off http://developer.mbed.org/users/hudakz/code/CAN_Nucleo_Hello/ mts datasheet http://www.innovatemotorsports.com/support/downloads/Seriallog-2.pdf MSCAN http://www.msextra.com/doc/pdf/Megasquirt_CAN_Broadcast.pdf

** PLEASE NOTE ** MSCAN has table and data offsets to choose what data it requires, this code hasn't implimented any of that so regardless of them it just sends lambda for the first analog value and the mts function value in the second

MTS Serial is RS232 not ttl so you will need an RS-232 Transceiver

main.cpp@4:ccf4ac2deac8, 2015-07-25 (annotated)

Committer:
hudakz
Date:
Sat Jul 25 19:43:00 2015 +0000
Revision:
4:ccf4ac2deac8
Parent:
3:464b06c16d24
Child:
5:c6503b7ae971
updated

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hudakz 0:c5e5d0df6f2a 1 /*
hudakz 0:c5e5d0df6f2a 2 * An example showing how to use the CANnucleo library:
hudakz 0:c5e5d0df6f2a 3 *
hudakz 2:49c9430860d1 4 * Two NUCLEO boards are connected to the same CAN bus via CAN transceivers (MCP2551 or TJA1040, or etc.).
hudakz 0:c5e5d0df6f2a 5 * Transceivers are not part of the NUCLEO boards, therefore must be added by you.
hudakz 0:c5e5d0df6f2a 6 * Remember also that CAN bus must be terminated with 120 Ohm resitors on both ends.
hudakz 0:c5e5d0df6f2a 7 * See <https://developer.mbed.org/users/WiredHome/notebook/can---getting-started/>
hudakz 0:c5e5d0df6f2a 8 * The same source code is used for both NUCLEO boards, but:
hudakz 0:c5e5d0df6f2a 9 * For board #1 compile the example without any change.
hudakz 4:ccf4ac2deac8 10 * For board #2 comment out the line #define BOARD1 1 before compiling
hudakz 4:ccf4ac2deac8 11 *
hudakz 4:ccf4ac2deac8 12 * Once compiled, download the binaries to the boards.
hudakz 4:ccf4ac2deac8 13 * To start ping/ponging messages reset both boards at the same time.
hudakz 0:c5e5d0df6f2a 14 *
hudakz 0:c5e5d0df6f2a 15 * Note:
hudakz 0:c5e5d0df6f2a 16 * To simplify adding/getting data to/from a CAN message
hudakz 0:c5e5d0df6f2a 17 * inserter "<<" and extractor ">>" operators have been defined.
hudakz 0:c5e5d0df6f2a 18 * Please be aware that CAN message maximum data length is limited to eight bytes.
hudakz 0:c5e5d0df6f2a 19 * To make sure this limitation is not violated I recommend to first compile
hudakz 0:c5e5d0df6f2a 20 * your application with DEBUG enabled in "CAN.h" file.
hudakz 0:c5e5d0df6f2a 21 * Then run it and check for error messages.
hudakz 0:c5e5d0df6f2a 22 */
hudakz 0:c5e5d0df6f2a 23
hudakz 0:c5e5d0df6f2a 24 #include "mbed.h"
hudakz 0:c5e5d0df6f2a 25 #include "CAN.h"
hudakz 0:c5e5d0df6f2a 26
hudakz 3:464b06c16d24 27 #define BOARD1 1 // please comment out this line when compiling for board #2
hudakz 0:c5e5d0df6f2a 28
hudakz 0:c5e5d0df6f2a 29 #if defined(BOARD1)
hudakz 0:c5e5d0df6f2a 30 #define RX_ID 0x100
hudakz 0:c5e5d0df6f2a 31 #define TX_ID 0x101
hudakz 0:c5e5d0df6f2a 32 #else
hudakz 0:c5e5d0df6f2a 33 #define RX_ID 0x101
hudakz 0:c5e5d0df6f2a 34 #define TX_ID 0x100
hudakz 0:c5e5d0df6f2a 35 #endif
hudakz 0:c5e5d0df6f2a 36
hudakz 0:c5e5d0df6f2a 37 DigitalOut led(LED1);
hudakz 3:464b06c16d24 38 int ledTarget;
hudakz 0:c5e5d0df6f2a 39 Timer timer;
hudakz 0:c5e5d0df6f2a 40 CAN can(PA_11, PA_12); // rx, tx
hudakz 0:c5e5d0df6f2a 41 CANMessage rxMsg;
hudakz 0:c5e5d0df6f2a 42 CANMessage txMsg;
hudakz 2:49c9430860d1 43 long int counter = 0;
hudakz 0:c5e5d0df6f2a 44 volatile bool msgAvailable = false;
hudakz 0:c5e5d0df6f2a 45
hudakz 0:c5e5d0df6f2a 46 /**
hudakz 0:c5e5d0df6f2a 47 * @brief 'CAN receive-complete' interrup handler.
hudakz 0:c5e5d0df6f2a 48 * @note Called on arrival of new CAN message.
hudakz 0:c5e5d0df6f2a 49 * Keep it as short as possible.
hudakz 0:c5e5d0df6f2a 50 * @param
hudakz 0:c5e5d0df6f2a 51 * @retval
hudakz 0:c5e5d0df6f2a 52 */
hudakz 0:c5e5d0df6f2a 53 void onMsgReceived() {
hudakz 0:c5e5d0df6f2a 54 msgAvailable = true;
hudakz 0:c5e5d0df6f2a 55 }
hudakz 0:c5e5d0df6f2a 56
hudakz 0:c5e5d0df6f2a 57 /**
hudakz 0:c5e5d0df6f2a 58 * @brief Main
hudakz 0:c5e5d0df6f2a 59 * @note
hudakz 0:c5e5d0df6f2a 60 * @param
hudakz 0:c5e5d0df6f2a 61 * @retval
hudakz 0:c5e5d0df6f2a 62 */
hudakz 0:c5e5d0df6f2a 63 int main() {
hudakz 4:ccf4ac2deac8 64 can.frequency(1000000); // Initialize CAN and set bit rate to 1Mbps
hudakz 0:c5e5d0df6f2a 65 can.attach(&onMsgReceived, CAN::RxIrq); // attach 'CAN receive complete' interrupt handler
hudakz 0:c5e5d0df6f2a 66 timer.reset();
hudakz 0:c5e5d0df6f2a 67 #if defined(BOARD1)
hudakz 2:49c9430860d1 68 led = 1;
hudakz 2:49c9430860d1 69 timer.start();
hudakz 0:c5e5d0df6f2a 70 #else
hudakz 2:49c9430860d1 71 led = 0;
hudakz 0:c5e5d0df6f2a 72 #endif
hudakz 0:c5e5d0df6f2a 73
hudakz 0:c5e5d0df6f2a 74 while(1) {
hudakz 4:ccf4ac2deac8 75 if(timer.read() >= 1.0) { // check for timeout
hudakz 0:c5e5d0df6f2a 76 timer.stop(); // stop timer
hudakz 0:c5e5d0df6f2a 77 timer.reset(); // reset timer (to avaoid repeated send)
hudakz 0:c5e5d0df6f2a 78 counter++; // increment counter
hudakz 0:c5e5d0df6f2a 79 txMsg.clear(); // clear Tx message storage
hudakz 0:c5e5d0df6f2a 80 txMsg.id = TX_ID; // set ID
hudakz 0:c5e5d0df6f2a 81 txMsg << counter; // append first data item (always make sure that CAN message total data lenght <= 8 bytes!)
hudakz 0:c5e5d0df6f2a 82 txMsg << led.read(); // append second data item (always make sure that CAN message total data lenght <= 8 bytes!)
hudakz 0:c5e5d0df6f2a 83 can.write(txMsg); // transmit message
hudakz 0:c5e5d0df6f2a 84 printf("CAN message sent\r\n");
hudakz 2:49c9430860d1 85 led = 0; // turn off LED
hudakz 0:c5e5d0df6f2a 86 }
hudakz 0:c5e5d0df6f2a 87 if(msgAvailable) {
hudakz 0:c5e5d0df6f2a 88 msgAvailable = false; // reset flag for next use
hudakz 0:c5e5d0df6f2a 89 can.read(rxMsg); // read message into Rx message storage
hudakz 2:49c9430860d1 90 printf("CAN message received:\r\n");
hudakz 2:49c9430860d1 91 printf(" ID = %#x\r\n", rxMsg.id);
hudakz 2:49c9430860d1 92 printf(" Type = %d\r\n", rxMsg.type);
hudakz 2:49c9430860d1 93 printf(" Format = %d\r\n", rxMsg.format);
hudakz 2:49c9430860d1 94 printf(" Length = %d\r\n", rxMsg.len);
hudakz 2:49c9430860d1 95 printf(" Data =");
hudakz 2:49c9430860d1 96 for(int i = 0; i < rxMsg.len; i++)
hudakz 2:49c9430860d1 97 printf(" %x", rxMsg.data[i]);
hudakz 2:49c9430860d1 98 printf("\r\n");
hudakz 0:c5e5d0df6f2a 99 if(rxMsg.id == RX_ID) { // if ID matches
hudakz 0:c5e5d0df6f2a 100 rxMsg >> counter; // extract first data item
hudakz 3:464b06c16d24 101 rxMsg >> ledTarget; // extract second data item
hudakz 3:464b06c16d24 102 led = ledTarget; // set LED
hudakz 1:267d6288df33 103 printf("counter = %d\r\n", counter);
hudakz 0:c5e5d0df6f2a 104 timer.start();
hudakz 0:c5e5d0df6f2a 105 }
hudakz 0:c5e5d0df6f2a 106 }
hudakz 0:c5e5d0df6f2a 107 }
hudakz 0:c5e5d0df6f2a 108 }
hudakz 0:c5e5d0df6f2a 109
hudakz 0:c5e5d0df6f2a 110