Hi Mychaela,
>The fact that you were able to get in with fc-loadtool indicates that >the boot ROM must be enabled. Can you please explicitly confirm that >you can run tools like fc-loadtool or osmocon -m romload against the >GTM900-B without needing to do anything via JTAG first? The reason I >am asking is because your very first introductory post about this >module showed JTAG test pad locations, giving the impression that JTAG >is required in order to work with this module. I confirm that you can run fc tools or osmocon without using JTAG first. That 4 test point, have no label, I break down some modules to figure it out That was JTAG For testing, using an USB to UART adapter with pc, connect pin 18/19 PIN 18 <-->usb-uart RX PIN 19 <-->usb-uart TX running osmocon -m romload PIN 31(reset) (as C118's pow key, pull down to GND shortly) the module will load the FW >Your code indicates that on this module TSPACT1 is the low band Tx >enable and TSPACT2 is the high band Tx enable, both active low - is >that correct? If so, then Huawei must have reversed these two control >signals relative to TI's Leonardo reference design, where they go the >other way around: TSPACT1 to enable high band Tx and TSPACT2 to enable >low band Tx, plus TSPACT4 to control the GSM850 Rx switch which is >only present on quadband boards. Openmoko's design permutes these 3 >RFFE control signals in yet another way. I checked the voltage of RF switch by changing TSPACT(1) TSPACT(2), it should be correct. >Aside from this little TSPACT RFFE control signal permutation, I find >it very remarkable that this Huawei modem is so close to TI's reference >design! Up until now it seemed to me that Openmoko was literally the >only Calypso-based modem manufacturer in the world who kept TI's >reference design (both hw and fw) with absolutely minimal changes, >while every other phone (Compal, Chi-Mei, Foxconn) and modem (BenQ M32) >manufacturer changed both the hardware and the firmware beyond all >recognition. I am glad to see Huawei stand next to Openmoko in this >regard! >As far as Huawei's firmware design goes, looking at your flash dump, >I was just as delighted to see a classic TIFFS file system structure >in the same flash location as on OM's modem (looking at your pictures, >it looks like this module uses the same Samsung flash chip as was used >by OM), and examining that file system content with my tiffs tool (I >can even use the same mokoffs user-friendly wrapper!), I see that it >contains TI's classic RF calibration tables! Getting FC Magnetite and >Selenite firmwares to run on this modem hw is promising to be a >breeze. :-) > 3) I would ship this module to US with fpc connector, you can just using > an USB to UART adapter to get it work with PC > https://app.2sim.cn/gsm/fpc.jpg >OK, I would like to buy 3 pieces from you - please email me off-list >to work out payment and shipping. M~ _______________________________________________ Community mailing list Community@freecalypso.org https://www.freecalypso.org/mailman/listinfo/community