This problem is likely the FTDI not being configured to tristate the IIC pins on reset, hence they are likely driven. This may be weakly enough that IIC open drain might work, or possibly some are configured to tristate and other aren't, or the config is random - just a thought.
- [casper] Roach2 i2c read/write failures Andrea Mattana
- Re: [casper] Roach2 i2c read/write failures John Ford
- Re: [casper] Roach2 i2c read/write failures Andrea Mattana
- Re: [casper] Roach2 i2c read/write failures John Ford
- Re: [casper] Roach2 i2c read/write failure... Andrea Mattana
- Re: [casper] Roach2 i2c read/write fa... John Ford
- Re: [casper] Roach2 i2c read/writ... David George
- Re: [casper] Roach2 i2c read/... Andrea Mattana
- Re: [casper] Roach2 i2c read/... Andrea Mattana
- Re: [casper] Roach2 i2c read/... Andrea Mattana