RoundV21 (2021-08-09 14:35:41)

Round V21 looks like AFreshTiny Round v2, and has the same hardware peripherals (4 strong lowside NFET outputs, multiple analog inputs, RPM/wheelspeed input and activation inputs, communication port, etc... ) , with more than double memory (flash and SRAM) for new firmware features in the future (theoretically upto about 3 times more software features, or bigger tuning or conversion maps).

The round V21 can be recognized by:

LSU4.9 nernst and pump and heater hardware, EGT, voltage out, boost, PWM0, PWM4 output etc... are tested from VemsTune. There is currently no other firmware released for this HW, for downgrade or upgrade (so only LSU4.9 is supported).

VemsTune "update ini from web" is needed


Use it with 0.7.51 firmware

The price of compatibility with old VemsTune, if attempting upload of an inappropriate fw (the "marker word" is erased before FW upload fails causing round to Stay in boot mode - need serial command to "Leave boot mode" every time after powerup)

The same procedure can be used in case some flash bits are suspected to have been corrupted by powerful X-ray or cosmic rays or strong ionising radiation (eg. beta or gamma). (Or if firmware verify shows "firmware is different").


NOTE: