The Calypso chip in GTM900 is D751949ZHH, which is also HERCROM400 series. The FCDEV3B chip is marked as PD75xx, do we know what is the difference between that and D75xx ?
-Serg On Mon, Jun 10, 2019 at 4:37 PM Mychaela Falconia < mychaela.falco...@gmail.com> wrote: > Hello FreeCalypso community, > > Last week I received a few GTM900 modules from Songbosi, and yesterday > I finally got around to powering one of them up using the included FPC > breakout board. Both Calypso UARTs are indeed brought out on this > module, and both of them work. The original firmware presents an AT > command interface on the MODEM UART and TI's RVTMUX interface on the > IrDA UART just like mainline TI/FreeCalypso firmwares; Huawei's > version of the RVTMUX interface features the same level of trace > verbosity as our TCS211 reference version and supports ETM commands > for reading and writing memory and registers, i.e., fc-tmsh works just > fine against Huawei's fw. > > The current version of fc-loadtool in the freecalypso-tools repository > now supports flash operations on these GTM900 modules. The new target > is -h gtm900, telling the Calypso boot ROM to run the ARM7 core at > 52 MHz and sensibly configuring MEMIF registers, whereas newly added > support for the flash part of the K5L3316CAM MCP (the combined > flash+RAM chip used in these modules) resides in the fc-loadtool > binary itself. The new flash handling architecture in fc-loadtool as > of two weeks ago is based on a hard-coded table of all supported flash > chip types, designed to grow easily as new devices are found, plus an > autodetection mechanism that selects among these supported flash chip > types based on the ID codes read from the chip. > > The next step for me is to put out a new release of FC host tools. I > still need to finish documenting some of my earlier changes (in > particular the documentation for the target-utils suite needs to be > finished), and when I am done with this documentation work and maybe a > few more minor code changes, we'll have the release. > > After we get the next FC host tools release out that includes GTM900 > support and other recent developments (the most interesting is the > manipulation of the undocumented register in the Iota ABB to fix the > erratic behaviour seen in the test reset, then poweroff, then PWON > sequence - see Calypso-test-reset article in freecalypso-docs), before > I go to the next step of adding GTM900 target support to our Magnetite > and Selenite firmwares, there will be an intermediate step of producing > a better breakout board for these GTM900 modem modules. > > The way I see it, the motivation behind providing full FC support for > these GTM900 modems is to allow these very cheap modules to serve as > a much cheaper alternative to our expensive FCDEV3B, making our > FreeCalypso sw/fw offerings accessible to those who cannot afford our > high-end hardware. To make such usage possible, we need a better > breakout board for these FPC-interfaced modems - not just a dumb > breakout board that turns every FPC pin into a 2.54 mm pin 1:1, but a > more purpose-made one. My idea to build a breakout or interface board > that will have the SIM socket, PWON and RESET pushbuttons on the board > itself and provide the same connectors for power and for the dual UART > as on the FCDEV3B. I plan on working on this breakout or interface > board design after the FC host tools release. > > Hasta la Victoria, Siempre, > Mychaela aka The Mother > _______________________________________________ > Community mailing list > Community@freecalypso.org > https://www.freecalypso.org/mailman/listinfo/community > _______________________________________________ Community mailing list Community@freecalypso.org https://www.freecalypso.org/mailman/listinfo/community
