11:27 <pedro_a> hi , anyone here could give me some tips on how to configure openocd to read and write an epprom using tumpa device (tiao) on swd header for 24c64 chip ? , there no information available on openocd to use this option or even this epprom , thank you

12:00 <pedro_a> 1

12:14 <PaulFertser> pedro_a: hi

12:14 <pedro_a> hi paul

12:14 <PaulFertser> pedro_a: what is EEPROM connected to? Just TUMPA alone, no CPUs involved?

12:14 <PaulFertser> What's "swd header" then?

12:14 <pedro_a> just to umpa

12:14 <pedro_a> tumpa

12:15 <PaulFertser> pedro_a: ok, so there's no JTAG, no SWD, no microcontrollers, just an I2C EEPROM connected directly to TUMPA and nothing else, right?

12:15 <pedro_a> yes

12:15 <pedro_a> wait

12:16 <pedro_a> http://www.tiaowiki.com/w/TIAO_USB_Multi_Protocol_Adapter_User%27s_Manual

12:16 <pedro_a> look 5.15

12:16 <PaulFertser> Yes, I know what TUMPA is.

12:17 <pedro_a> i have connected eprom 24c24 using that connection on SWD header

12:17 <pedro_a> 24c64 sorry

12:20 <PaulFertser> pedro_a: ok, I do not have a ready made solution for you, what I can suggest is using "libftdi" library and writing your own minimal eeprom flashing implementation using that.

12:24 <pedro_a> do you mean using ftdi_eeprom tool ?

12:27 <PaulFertser> pedro_a: I think that tool is meant for flashing an EEPROM that's connected to certain ftdi pins for ftdi configuration itself, so no.

12:30 <pedro_a> ok , got it

12:33 <pedro_a> i have set this config in my openocd

12:34 <pedro_a> adapter driver ftdi

12:34 <pedro_a> ftdi vid_pid 0x0403 0x8a98 0x0403 0x6010

12:35 <pedro_a> my issue now is set swd communication in config

12:36 <pedro_a> added now transport select swd

12:37 <pedro_a> got this warning from openocd : SWD mode is active but SWD_EN signal is not defined

12:53 <pedro_a> i also added adapter speed to epprom to 100 Khz witch it is according to manufacturer specifications : adapter_khz 100

13:07 <pedro_a> now i am lost , the datasheet of this ic is here https://pdf1.alldatasheet.com/datasheet-pdf/view/22897/STMICROELECTRONICS/24C64.html , any tips ? Memory mapping and how adapter will comunicate to chip configurations in openocd are missing , and i have no idea how to set them up :) .

13:36 <PaulFertser> pedro_a: why are you talking about SWD?

14:14 <pedro_a> because the specific port where i have the chip connected is called swd .

14:15 <PaulFertser> pedro_a: you shouldn't be connecting an i2c eeprom to SWD port, it makes no sense to do that.

14:22 <pedro_a> the reason is because this chip uses the same pin for input and output of data , on other times i used openocd the cips or cpus had specific pins for input and output witch was more easier , i also have tried before this swd option this chematic here https://ao2.it/en/blog/2012/09/23/tumpa , where he uses the jtag port and 2 resistors , however he used ftdi_epprom , the only thing i got from this connection was the FT2232 header , so i am lost in with

14:22 <pedro_a> this chip

14:26 <PaulFertser> pedro_a: reading and writing i2c eeprom has nothing to do with SWD.

14:27 <PaulFertser> pedro_a: you're also misreading the blog post. One thing is external eeprom, another is the one that ftdi uses to store configuration.

14:28 <PaulFertser> The post says libmpsse with a custom app was used to access external eeprom.

15:01 <pedro_a> so , do you advice conecting the chip to jtag port using that schematic ?

15:04 <PaulFertser> pedro_a: it doesn't matter since you have no software that supports it anyway

15:06 <pedro_a> flashcat supports it , sadly my pcb version is the 1.8 and it is only supported after pcb version 2.1 , i will figure it out

15:06 <PaulFertser> pedro_a: if you have SWD connector then your tumpa is the newest version.

15:07 <PaulFertser> pedro_a: where do you see flashcat supports ftdi for talking to i2c eeprom?

15:09 <pedro_a> on their manual

15:10 <PaulFertser> Please give a link

15:12 <pedro_a> https://postimg.cc/gxS0dW8m

15:13 <PaulFertser> pedro_a: but flashcat is for some other hardware, not just ftdi board, right?

15:14 <pedro_a> yes , it is not the tumpa device i have here , i was trying with this one

15:14 <pedro_a> i have here the flashcat 1.8 but it does not work with this eeprom

15:15 <PaulFertser> You can use tumpa but apparently you need to write or find an app.

15:16 <PaulFertser> pedro_a: looks simple https://github.com/devttys0/libmpsse/blob/master/src/examples/i2ceeprom.c

15:17 <PaulFertser> Yeah, I'd just use that.

15:20 <pedro_a> i will have first to compile a little detail from here https://github.com/devttys0/libmpsse

15:20 <PaulFertser> pedro_a: btw, don't you have a raspberrypi?

15:22 <pedro_a> :D yeas i have it , but it is not working and i will not dedicate my time over it , it have a power source issue , if this does not work then i will probably order a new flashcat to get over this issue

15:44 <pedro_a> well i give up , libmpsse-dev is so old and was never updated its code that print all errors on compiling , mostly deprecated instructions no longer used , and even if i install it anyway then i get gcc errors when it tries to compile i2ceeprom , i will go to flashcat hardware , more simple and faster