Hi Wolfram, thanks for your answer. > > I'm currently writing a driver for a cheap usb-to-i2c master device, > > which unfortunately can only write 31 bytes (+slave addr) and read 32 > > bytes. > > Which one? CH341 based ones like this one http://wch-ic.com/download/down.asp?id=114 They go for about ~12 USD on ebay so quite affordable. lsusb shows it as ID 1a86:5512 QinHeng Electronics CH341 in EPP/MEM/I2C mode, EPP/I2C adapter > If you have control over sending start/stop bits, you could omit the > stop condition unless you transfered all of the 32 byte chunks and issue > the stop at the end. This should be possible - I'll give it a try. Once I've finished my testing I'll post it here for review. Thanks, Peter -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html