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#apertus IRC Channel Logs

2021/03/25

Timezone: UTC


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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
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satacker[m]
Hello
07:50
se6ast1an
just approved your lab account satacker[m]
07:51
satacker[m]
Thank you
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Bertl_zZ
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Bertl
morning folks!
12:04
satacker[m]
morning :)
12:05
satacker[m]
I have an esp32 dev board which has a cp2102 usb-ttl conv. how do you suggest i do bit-banging ?
12:07
satacker[m]
I have some experience with esp-idf toolchain and api
12:09
Bertl
what bits do you want to bang and why?
12:10
satacker[m]
To test the SPI bus driver that uses bit banging
12:10
satacker[m]
as per the task
12:11
satacker[m]
Task 2 of kernel challenge
12:20
Bertl
ah, well, yes, you can certainly use the CP2102 for that
12:21
satacker[m]
but its baked iin
12:22
Bertl
got a schematic of that dev board?
12:28
satacker[m]
https://www.espressif.com/sites/default/files/documentation/esp32-devkitc-v4_reference_design.zip
12:34
Bertl
well, that is going to be tricky ... from the 8 modem lines only four seem to be connected (RXD, TXD, DTR and RTS)
12:35
Bertl
one (RTS) is also used to enable/disable the entire thing
12:36
Bertl
ah, no DTR is tied to EN
12:36
Bertl
this leaves you with RXD, TXD and RTS
12:36
Bertl
still possible to work with that as SPI can work with three wires
12:38
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
12:38
Bertl
(using RXD, TXD and IO0/RTS)
12:44
satacker[m]
https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/spi_master.html
12:46
Bertl
yes, you can try that if you connect the correct I/O pins
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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
20:47
Bertl_oO
nn
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