tonton81
Senior Member

you can try a new development flexcan library that mimics mcp_can with advanced features, and perhaps report if it works for you, it’s called IFCT, I have an update comming either today or tomorrow which will allow more...

Good evening everyone. I created a simulation of the mcp_can library on teensy, that mimics the behaviour of how mcp_can works, but redirects config/data to flexcan controller instead. This simulation allows you to use...

you can adjust the timeslices to suit priority needs. you can use volatile but your talking about variables. mutexes are to protect the resources (and optionally variables if you wish...) as 2+ threads cannot access the...

why would you need a timeout? the moment the scope is done the lock is automatically release, including if you do any returns;.

did you try putting a slight delay in startup? void setup() { pinMode(LedPin, OUTPUT); Serial.begin(9600); delay(1000); } I say this because just the serial monitor will work doesnt mean an external...

If he puts the PJRC bootloader on the USB separate unit (if not already done), you wouldn't need bootloader chips on those 30x30 mm boards, this would reduce the cost factor if using 1 programmer for many teensy 3.2...

Would be nice for you to post your arduino sketch so we could see where the actual problem is located, the above code wouldn't really help us see the problem.

Greetings, I've redesigned the reading of mailboxes and FIFO and changed the way read() is used. 2 new methods have been formed, ::readMB() and ::readFIFO(). They will be used to read either mailboxes or FIFO...

Hello all, I fixed a bug which is present in all teensy flexcan libraries, including IFCT, which contain the CAN_message_t struct. The bitfields are not default to 0, and it caused unpredictable behaviour when...

everyone loses the ability to re-edit a post after 2 hours. This was done to prevent some ravage individuals from mass deleting their posts when they were upset

if only we were dealing with a single payload a mesh would be very easy to do, but we need to rebuild ordered payloads of each containing 8 bytes max, which means the library would need to handle several packets per...

yeah been through a few of them, but they only deal with single calls, if two or more nodes chime in things can happen, this why i need a design idea thats based on actually controlling a teensy, not just data layer,...

Yup, your right it was only a test thing to play with that got you too involved :P But between teensies it still makes a good broadcasting communication link. I think we’ll let IFCT go through a few more stability...

Can't tell you which it would reply on, capturing all traffic is good to start with to know for sure, then you can filter id by callback (software filtering) or use flexcan's hardware filter in library (hardware) which...

you can sort in excel and slight to right side to get a better idea but: theres at least 2 or more ID's that can see non-random data, or mostly none, those are most likely status messages for things like climate...

btw, did you try sending to 0x18DB 33F1 as the ecu address (with the msg.ext = 1) ? the identifier is similar to the normal ecu addressing of 8th gen civics

my car uses iso 15765-4 as well, thats normal. also with the key off it does the same thing with the repetitive outputs, i believe they use that to notify the modules that the vehicle is off, usually on mine when...

if you dont want to handle issues with serial out of sync (you need to write a protocol for serial) , i2c is also slow, but the data chunks have hardware crc on canbus so you can rest assured the data you send wont be...

just throwing it out there as an alternative option, you could always use canbus to link up teensies together, youll have the option to control a set of servos or a mass of them depending on how youll handle the IDs,...

without a breakout, how many can the teensy itself run off the gpios directly provided it can achieve that pwm rate smoothly? :)

yes, im sure all transceivers work but i got that one cuz of its nice form factor :) take note that the enable pin of that transceiver should be GND for the tranceiver to work other transceivers i believe are set...

my moms 2015 civic might be similar but i wouldnt have time to devote it for testing use as she needs it :P once im done paying that one off ill get another civic for myself i spent the last week installing 2x...

i currently have a 2007 dxg civic, but the 8th gens are from 2006-2011, dont expect 2014 to have same pids as the modules are different along with the ecu, the best way is to capture the current temp/fuel via ecu...

Michael is right, 3.3V | 2.2K ohm | MCP pin 12 SCL is plugged into pin 19 on the 3.6. MCP...

i googled your car and idatalink, which are bypass modules for remote starters for your car, they usually work off proprietary data over canbus and transponder system :)

Page 36 :)

funny they dont speak CAN yet your receiving data, im not familiar with cross-protocols but the controller wouldnt pick up data if it wasnt supported :o don't believe some people on forums as not everyone could be...

Battery voltage is calculated as follows for pid 42 request: ( A * 256 + B ) / 1000

Have you got any logs of the odbmxtool? I never used the PC end software, I too used the MX with an iPhone 5 and an android phone (Yeah, contrary to the MX supporting Ford and GM but doesn't support the iPhone, where a...

lacking a given diagram of your setup, make sure your address lines are all tied to GND since your using 0x20 in your sketch, also make sure the MCP reset line is tied HIGH, ALSO make sure your running the MCP chip at...

You mean the alternate pins? Yes they can be dynamically changed via setSCL and setSDA (provided the library doesnt reset anything else in the process of course) for i2c_t3: inline void setSCL(uint8_t pin) {...

you could try overriding yield with a blank one added anywhere in your sketch: void yield(void) {};

orbitronics, How many of those servos could you control off a single teensy 3.6 given it's capable of low latency controlling them? (not using adafruit board)

Probably the termination on your receiver needs to be removed, the bus on a vehicle is already terminated so extra terminations may cause issues. Also The data from the ECU requests like RPM can be ever so slightly off...

Try "1U" for specifying it's an unsigned type? Also, which Wire library is this? I2C_T3 is commented out of your sketch mcp1_address must be of uint8_t type as well

Hello all, I've updated the library to support FIFO filtering tables B & C, auto masking is done with Tables A & B, I omitted to include auto masking for TableC as since all extended and standard IDs are partial, it...

Yup, thats normal. The groupings and repetitive broadcasts are normal, this shows your connections are fine. The data you see is the traffic scrolling off the multiple modules on the car, not just the ECU. You could...

indeed, but it’s the pads that help expose the more pins on teensy which keeps its slim form factor. Even the 4.0 if it were to break out all the pins you would probably have a big form factor, ive been using the quad...

i honestly dont think its a good idea to solder wires directly to the pads if it means the device/teensy will not be solid, if your going to do that you should do so safely and make sure both objects don’t stretch in...

straight headers combining the pads with the holes are good for support, i usually solder 4 rows of headers to cover the pads and pins, 2 rows each side

yes events() will enable the queue system to clear the mailbox faster in case your callbacks take too long in processing, the design might change a bit but events() most likely will stay.

setMB wont work on FIFO unless the MB’s are above or equal to MB8, FIFO takes over the first 8 mailboxes your write will actually be going out MB8 since its first transmit mailbox, MB0 wasnt set because its owned by...

Update: Added FIFO filtering support, with automatic masking capability as well. Usage: (by default you have 8 filters for FIFO) Can0.setFIFOFilter(REJECT_ALL); /* initially, we set all the filters to ignore...

the read() function doesnt goto callback but you should check the id field of return before running sprintf as it could be any id, or the engine which is sending other data not just rpm (in case you did multiple...

my theory is the mouse in teensy MoveTo uses absolute positioning in single monitor use. To assign the pointer accross a field of 2+ monitors you can't really assign absolute positions a regular mouse doesnt use...

check your monitor settings in desktop, often times primary/secondary doesnt mean right and left. your primary could be the second monitor in windows, check your display settings page for info

Updates added this week and posted on github: 1) Can0.read(msg) has been updated to only pull messages from non-interrupt enabled mailboxes. 2) Can0.events() changes the way the interrupts work when directly...

no idea, i only worked on teensy registers so im not fluent in avr registers :)

Sorry buddy but the slave is hardcoded to work only on the 3.x series

it depends on how fast your handling the MB interrupt, remember your asking for IDs 1-3, so when you send all 3 to a multi-id mailbox, you catch the first, but maybe your not done “processing it” before 2 comes, and no...

i didnt want to spam/advertise, im not affiliated with them i just ordered off their ebay page ...

i got a few of these that i played with in past, sure theyre for the PI, but after tracing the lines on the connector i had it working in teensy. they have both spi &i2c variety, but spi is faster, i dont bother with...

You could also use a union, this doesn't freeze: void convert2Float(const CAN_message_t &frame) { union ifct { float val; uint8_t b; }; ifct data, data1; Serial.print("C2F_FRAME: ");

You could do it this way: convert2Float(msg); void convert2Float(const CAN_message_t &frame) { uint8_t data; uint8_t data1; Serial.print("C2F_FRAME: "); for (uint8_t i = 0; i < 8; i++) { if ( i...

you can pass only if you add "const" to the overload void func(const CAN_message_t &msg) {}

T3.5 seems to be "locking" up in your last function, probably an overflow, i put a "return" at the top so it never runs and i can reprogram it fine. If i let it as-is i have to push program button on t3.5 so there must...

Your MB0/MB1 callbacks seem to be processing on default variable initialization (0) myMSG seems like it supposed to update those vars, because I see the data printout from myMSG being intact, I don't think your...

The code i just posted is working fine here, doesnt freeze. Is your transceiver working / setup and driven to be enabled? Output: *HEARTBEAT* 397399 FIFO Disabled Mailboxes: MB0 code: RX_EMPTY (Standard...

This is working for me, red is where I modified, blue is requirement to enable my transceiver chip #include <IFCT.h> float pressure, temp; float lat, lon, head, spd, fType, nSV; CAN_message_t msg; // setup a...

simple, your settting the filter in setup, but your setMB’ing in the loop. assigning setMB clears the setMBFilter remove the setMB in loop, and put it before setMBFilter line1: setMB(...) line2: setMBFilter(...) ...

Today I added another feature, it was Mike's idea :) It's actually a good idea to implement it as well. If a user wishes to send data sequentially to another node, it is recommended not using any available transmit...

just pickup a dht22, they have a wide temp range which wont affect humidity/temp values (much)

https://forum.pjrc.com/threads/35585-std-map-error-undefined-reference-to-std-_Rb_tree_decrement

Another update for today, I added mailbox provisioning for ID ranges. To allow mailbox MB2, for example, to accept ID ranges from 0x20 to 0x2A, do this: Can0.setMBFilterRange(MB2, 0x20, 0x2A); This will setup...

Perfect, don't forget to add pullup resistors for the I2C lines as well, and you should be fine (pull the lines to 3.3V via a 4.7 or 2k resistors (u need 2 resistors)) you can use the illustration of SDA/SCL line of...

about 2 pins down t3.6’s Vin pin, youll see 3.3v you can use that for the mcp, that way it can be wired safely to teensy as 3.3v chi. use any GND pin. Take care when adding the 4 expanders that they consume less than...

Vin is the voltage input which should be no higher than 6V MAX!!!!! Teensy's on-board regulator will handle the conversion from 5V to 3.3V and everything on the T3.6 will be 3.3V only mode. Vin is just a source of...

Good evening, oh silent ones :) Today I worked on filtering support, and for those individuals who are uncertain on how masking is done, don't worry, the library will take care of that calculation for you...

Set your setMB’s once, not in a tight loop. MB1&2 properly changed to transmit but you can’t control which mailbox its sent to as now you have 10 transmit buffers and write() chooses the one that isn’t busy...

Can0.setMB(MB8, TX); //Add ,IDE for extended frames. Can0.setMB(MB9, TX); //Add ,IDE for extended frames. you set the mailboxes as transmit, so MB8 & 9 are transmit interrupts by default when fifo enabled...

Update release for this morning: 1) Added max mailbox support for non-FIFO mode, allows you to set, instead of the default 16 hardware mailboxes offered, to a lower limit, which, in some cases, depending on...

Just tested it: void setup() { Serial.begin(115200); delay(1000); pinMode(2, OUTPUT); digitalWrite(2, 0); char data; Serial.print("Data buffer size: "); Serial.println(sizeof(data));

i found this off stack overflow site char data; float f = 0.6f; memcpy(data, &f, sizeof f); // send data float g; memcpy(&g, data, sizeof g); // receive data

I've updated the library to support 3.2,3.5, and 3.6 with alternate pins Updates: 1) Can0 and Can1 are initialized (for Teensy 3.6, otherwise Can0 can be used on teensy 3.5 and 3.2 devices) 2) Alternate pins, 3.6...

you dont need to “always” set it via serial. you can upload a sketch that would write whatever bytes you want to the eeprom, then load your normal sketch which would read it fine.

Thanks Mike :) The library has been posted on github: https://github.com/tonton81/IFCT If anyone has feedback, suggestions, or requested features to be implemented, I'll be taking notes :) Enjoy

Thanks, I'm not a linux expert tho, but all these details you can give will help Paul if there indeed is an issue

void setup() { Serial.begin(38400); delay(1000); // try as a test? } void loop() { Serial.println("Hello World"); delay(1000); }

do you need all that buffer? #define GRANULAR_MEMORY_SIZE 12800 int16_t granularMemory; theres no way to save 50K of ram your overflowing on teensy 3.2, you need a teensy 3.5 or 3.6 upgrade

yup, and we get -20 temps here in winter, still running with t3.5 :), and boiling temps in summer

I'm using a Teensy 3.5 for automotive use. I suggest you don't use buck converters and just go straight to a voltage stabilizer that survives cranking while maintaining steady voltage, the one I use works between 8-40 V...

NVIC_SET_PRIORITY(IRQ_CAN0_MESSAGE,0); NVIC_ENABLE_PRIORITY(IRQ_CAN0_MESSAGE); try adding that AFTER can0.begin... i havnt check the display library, but if its disabling interrupts that can be a different issue