Innovate MTS to Megasquirt MSCAN
Fork of CANnucleo_Hello by
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
- Committer:
- hudakz
- Date:
- 2015-07-24
- Revision:
- 3:464b06c16d24
- Parent:
- 2:49c9430860d1
- Child:
- 4:ccf4ac2deac8
File content as of revision 3:464b06c16d24:
/* * An example showing how to use the CANnucleo library: * * Two NUCLEO boards are connected to the same CAN bus via CAN transceivers (MCP2551 or TJA1040, or etc.). * Transceivers are not part of the NUCLEO boards, therefore must be added by you. * Remember also that CAN bus must be terminated with 120 Ohm resitors on both ends. * See <https://developer.mbed.org/users/WiredHome/notebook/can---getting-started/> * The same source code is used for both NUCLEO boards, but: * For board #1 compile the example without any change. * For board #2 set BOARD1 to 0 * * Note: * To simplify adding/getting data to/from a CAN message * inserter "<<" and extractor ">>" operators have been defined. * Please be aware that CAN message maximum data length is limited to eight bytes. * To make sure this limitation is not violated I recommend to first compile * your application with DEBUG enabled in "CAN.h" file. * Then run it and check for error messages. */ #include "mbed.h" #include "CAN.h" #define BOARD1 1 // please comment out this line when compiling for board #2 #if defined(BOARD1) #define RX_ID 0x100 #define TX_ID 0x101 #else #define RX_ID 0x101 #define TX_ID 0x100 #endif DigitalOut led(LED1); int ledTarget; Timer timer; CAN can(PA_11, PA_12); // rx, tx CANMessage rxMsg; CANMessage txMsg; long int counter = 0; volatile bool msgAvailable = false; /** * @brief 'CAN receive-complete' interrup handler. * @note Called on arrival of new CAN message. * Keep it as short as possible. * @param * @retval */ void onMsgReceived() { msgAvailable = true; } /** * @brief Main * @note * @param * @retval */ int main() { can.frequency(500000); // Initialize CAN and set bit rate to 500kbs can.attach(&onMsgReceived, CAN::RxIrq); // attach 'CAN receive complete' interrupt handler timer.reset(); #if defined(BOARD1) led = 1; timer.start(); #else led = 0; #endif while(1) { if(timer.read() >= 2.0) { // check for timeout timer.stop(); // stop timer timer.reset(); // reset timer (to avaoid repeated send) counter++; // increment counter txMsg.clear(); // clear Tx message storage txMsg.id = TX_ID; // set ID txMsg << counter; // append first data item (always make sure that CAN message total data lenght <= 8 bytes!) txMsg << led.read(); // append second data item (always make sure that CAN message total data lenght <= 8 bytes!) can.write(txMsg); // transmit message printf("CAN message sent\r\n"); led = 0; // turn off LED } if(msgAvailable) { msgAvailable = false; // reset flag for next use can.read(rxMsg); // read message into Rx message storage printf("CAN message received:\r\n"); printf(" ID = %#x\r\n", rxMsg.id); printf(" Type = %d\r\n", rxMsg.type); printf(" Format = %d\r\n", rxMsg.format); printf(" Length = %d\r\n", rxMsg.len); printf(" Data ="); for(int i = 0; i < rxMsg.len; i++) printf(" %x", rxMsg.data[i]); printf("\r\n"); if(rxMsg.id == RX_ID) { // if ID matches rxMsg >> counter; // extract first data item rxMsg >> ledTarget; // extract second data item led = ledTarget; // set LED printf("counter = %d\r\n", counter); timer.start(); } } } }