Hi Harald,
On 5/28/21 11:15 AM, Harald Welte wrote:
Hi Katharina,
thanks for your follow-up.
Can you please share which phone / modem models you have reproduced this with?
I am testing with a OnePlus 6T with a Qualcomm SDM845 Snapdragon 845
Maybe I can find the same in my collection.
I will try to run cardem on simtrace on a variety of different phones here and see which ones work or don't work.
On Wed, May 26, 2021 at 03:03:38PM +0200, Katharina Kohls wrote:
BTW while debugging this I realized that the pin layout might be documented in the wrong order: The wiki says TX is on 4 (pin 1 = GND, pin 4 = TX, pin 5 = RX), however, for me it only worked when hooking up pin 5 with the RX of my UART to USB. Is that a typo?
I've always using the 2.5mm stereo jack, as those are used in a lot of Osmocom projects starting with OsmocomBB more than a decade ago.
tHe 5-pin UART header was designed to match the FTDI USB-UART cable pin-out.
The schematics are available, they should definitely be the definitive source to answer those kind of questions.
It states: 1 GND 2 CTS 3 VCC 4 DRXD (SAM3) = TXD of your UART cable 5 DRXD (SAM3) = RXD of your UART 6 CTS
Maybe the wiki could be further clarified?
I think this already is a good explanation: The Wiki reads like pin 5 *is* the RX of the simtrace, but looking at the documentation above it *should be connected to* the RX of the UART adapter. I can clarify that in the Wiki.
Best, Katharina