I am trying to get my BBB to talk to an SSD1803a based LCD (specifically a Midas MCCOG42005A6W) and I'm failing miserably at the moment. :-(
I bought the MCCOG42005A6W because it's 3.3 volt and I2C bus so thought it would be simple. I'm fairly certain I have the connections correct etc. but I can't get the i2cdetect command to 'see' the MCCOG42005A6W. Presumably until it can see the device I'm not going to get any further. However I'm not absolutely sure that the MCCOG42005A6W works in a way that i2cdetect will understand, I'll try and explain. The MCCOG42005A6W only brings out the I2C interface from the underlying SSD1803a, each 'command' to the SSD1803a comprises a control byte (of which only two bits are significant) and an 8-bit command (which is a superset of the HD4478OU command set). Thus the SSD1803a (and in turn the MCCOG42005A6W) *always* needs 16-bits to be sent to it before it will respond with anything useful. Hence any detection program that tries sending an I2C address followed by an 8-bit 'command' will not get any sort of response, will this confuse i2cdetect? I do have a 'scope but not a logic analyser, I can't detect anything useful happening on the clock or data lines with the 'scope but that may simply be because it happens for too short a period for me to see anything. Can anyone suggest how I can progress this? -- Chris Green ยท -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
