Bonjour, Le Fri, 17 Mar 2017 07:23:27 +0000 Luke Kenneth Casson Leighton <[email protected]> a écrit:
> --- > crowd-funded eco-conscious hardware: > https://www.crowdsupply.com/eoma68 > > > On Thu, Mar 16, 2017 at 3:40 PM, Albert ARIBAUD > <[email protected]> wrote: > > Hi Luke, > > > > Le Tue, 14 Mar 2017 07:32:17 +0000 > > Luke Kenneth Casson Leighton <[email protected]> a écrit: > > > >> sorry albert just checked the schematics and also watterott's > >> HDMI_Display schematic - it's HDMI DDC that the STM32F072 needs to > >> emulate! but looking at the watterott schematics that's just an > >> EEPROM (again). > >> > >> l. > > > > OK, I'm lost :) and not really familiar with the passthrough card > > so let me try to find my bearings back; just stop me when I'm > > wrong. The goal is that the passthrough card advertise on its HDMI > > connector's I2C the display capabilities of the microdesktop it is > > slotted into. Correct? > > > > So at the interface level, it should behave as an I2C slave EEPROM > > wrt DDC_SDA and DDC_SCL (that's I2C1 on the STM32) and as an I2C > > master wrt the EOM68 connector's I2C. Right? > > no, ignore the EOMA68 connector entirely - that has nothing to do > with this. > > the pins are the ones i listed. which is *NOT* the EOMA68 I2C pins. > it's two *SEPARATE* pins which is why it really should be done as > bit-banging. > > > Now, what I am not sure about yet is whether there are any > > conversion to be made between the I2C data read from the > > microdesktop(s I2C and the data to be provided on the HDMI DCC > > IC2. > > nnnope! i would have said. it's very very simple. just straight > "read EDID data from EEPROM then replay EDID data from EEPROM.". > > that's all that's needed. OK, got it now. There is no firmware started yet for the passthrough card at [email protected]:eoma-firmware, right ? So I'll start from scratch. > l. Amicalement, -- Albert. _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
