![]() Performance boards with only a single I2C port, the blocking Wire Of course, I'm sure someone reading this is thinking "why do this atĪll, the Wire library has worked well for 10 years". Or maybe there's some better non-blocking API than event callback functions? Non-blocking if the user has set up a completion callback function? Maybe 2 more of these could be added for master mode,Īnd the traditional requestFrom and endTransmission would become The library already has onReceive(function) and onRequest(function) usedįor slave mode. Or maybe a complete function would be giving with something like: Later when the transfer completes, the function would be called. When given a function to call, requestFrom would immediately return. Wire.requestFrom(address, length, true, myfunction) Perhaps another optional parameter could beĪdded for a function to be called? Such as: ![]() The 2 blocking functions are Wire.endTransmission() and Wire.requestFrom().Įach of these currently accepts an optional parameter for whether or not We developers work together for API compatibility. I believe everyone benefits in the long term when Ideally I would like to see this adopted by the officialĪrduino Wire library. You should check that is what you expect.One of my many goals this year is a non-blocking extension to the Wire Wire.requestFrom returns the number of bytes obtained. Wire.requestFrom does not return until it has the data, so you don't need to "wait for response". Void thermo_read(byte start, byte adrStep, byte num) // Wait for response Thermo_read(0x00,0x01,0x40) //Start at 0th sensor, step by 1, read 40 sensors The code I'm using is below: #include ĭelay(15) // Ensure initialization is complete Where the '^' are START and the '-' are ACK. ^SLAVEWRT-OPCODE-STARTADR-STEPADR-NUM-^SLAVERD-BYTE-BYTE-.-STOP The datasheet for the MLX90620 shows that the I2C communications for a read should go like this: However my code doesn't seem to work and I think it might be because the Wire library doesn't support the type of communication I need. ![]() I'm very new to Arduino and had originally attempted to code this using the built-in Wire library. In one thread there was some sample code that used an external I2C library called I2CMaster. I read through 4-5 threads where people were connecting MLX90620 thermopile arrays to their arduino's. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |