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#apertus IRC Channel Logs

2021/03/25

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Bertl_oO
off to bed now ... have a good one everyone!
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se6ast1an
good day
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BAndiT1983
hi
08:49
satacker[m]
Hello
08:50
se6ast1an
just approved your lab account satacker[m]
08:51
satacker[m]
Thank you
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Bertl_zZ
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Bertl
morning folks!
13:04
satacker[m]
morning :)
13:05
satacker[m]
I have an esp32 dev board which has a cp2102 usb-ttl conv. how do you suggest i do bit-banging ?
13:07
satacker[m]
I have some experience with esp-idf toolchain and api
13:09
Bertl
what bits do you want to bang and why?
13:10
satacker[m]
To test the SPI bus driver that uses bit banging
13:10
satacker[m]
as per the task
13:11
satacker[m]
Task 2 of kernel challenge
13:20
Bertl
ah, well, yes, you can certainly use the CP2102 for that
13:21
satacker[m]
but its baked iin
13:22
Bertl
got a schematic of that dev board?
13:28
satacker[m]
https://www.espressif.com/sites/default/files/documentation/esp32-devkitc-v4_reference_design.zip
13:34
Bertl
well, that is going to be tricky ... from the 8 modem lines only four seem to be connected (RXD, TXD, DTR and RTS)
13:35
Bertl
one (RTS) is also used to enable/disable the entire thing
13:36
Bertl
ah, no DTR is tied to EN
13:36
Bertl
this leaves you with RXD, TXD and RTS
13:36
Bertl
still possible to work with that as SPI can work with three wires
13:38
Bertl
you can either disable the ESP (SW2) and connect the pins somewhere else, or write some ESP code to act like an SPI device
13:38
Bertl
(using RXD, TXD and IO0/RTS)
13:44
satacker[m]
https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/spi_master.html
13:46
Bertl
yes, you can try that if you connect the correct I/O pins
14:31
Bertl
off for now ... bbl
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Bertl
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Topic
apertus° - open source cinema | www.apertus.org | join the apertus° Lab: http://lab.apertus.org/ | IRC Logs available at: http://irc.apertus.org | Weekly IRC meeting: Monday 18:00 CET/CEST
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se6ast1an
off to bed, good night
21:47
Bertl_oO
nn
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