Search found 25 matches
- Wed May 15, 2024 9:49 pm
- Forum: General Discussion
- Topic: Defective chip or broken software?
- Replies: 0
- Views: 730
Defective chip or broken software?
i have 3 wemos s2 mini boards and all of them can scan for wifi networks but only 1 can connect to wifi in the three. I have tested the resistors and capacitors around the chip of the good one and measured the others and they all are the same. Is the chip just defective? because it seems like abit w...
- Mon Apr 01, 2024 6:22 pm
- Forum: General Discussion
- Topic: L32R instruction with xtensa-esp32-elf-as assembler
- Replies: 2
- Views: 1034
L32R instruction with xtensa-esp32-elf-as assembler
Im using xtensa-esp32-elf-as compiler to compile asm code but if i use the L32R instruction it compiles to 0x410000. Which means the address i specified isnt actual included in the instruction. If i use L32I it works as expected. Am i missing something? in the code im just doing this [code]L32R a4, ...
- Mon Apr 01, 2024 2:19 am
- Forum: General Discussion
- Topic: USB on esp32-s3 wroom
- Replies: 2
- Views: 1152
Re: USB on esp32-s3 wroom
Since USB Signaling is indeed 3.3v then It makes sense that it wouldn't need level shifting. Also it makes sense why if VBus shorts to data pins it can damage the usb controllers on electronics. Its kinda funny how I've written host/device drivers for baremetal but i didnt know usb signaling was act...
- Sun Mar 31, 2024 5:04 pm
- Forum: General Discussion
- Topic: USB on esp32-s3 wroom
- Replies: 2
- Views: 1152
USB on esp32-s3 wroom
I have some esp32-s3-wroom-1u modules and was wondering if its okay to connect esp32s usb data (dp and dm) pins directly to hosts data pins. Since esp32 is 3.3v device while host pc is a 5v device doesnt esp32 need a level shifter? I have seen online that others have just connected them directly to ...
- Tue Mar 19, 2024 1:49 am
- Forum: General Discussion
- Topic: Help with function pointers and xTaskCreate & xTaskCreatePinnedToCore
- Replies: 3
- Views: 1116
Re: Help with function pointers and xTaskCreate & xTaskCreatePinnedToCore
It doesn't return its a loop. Apparently if i change the priority from 1 to 2 it works.
- Sun Mar 17, 2024 2:24 am
- Forum: General Discussion
- Topic: Help with function pointers and xTaskCreate & xTaskCreatePinnedToCore
- Replies: 3
- Views: 1116
Help with function pointers and xTaskCreate & xTaskCreatePinnedToCore
I want to run a task on a specific core. The code is loaded from external source. The external code just does some register moves and then an ILL instruction which causes the Illegal Instruction Exception as i intended it to. Code is loaded in IRAM btw. This works but it dispaches it to wrong core b...
- Sun Mar 17, 2024 1:53 am
- Forum: General Discussion
- Topic: How to set up Exception handler for Syscall
- Replies: 9
- Views: 1802
Re: How to set up Exception handler for Syscall
Yeh its really hard to find stuff for xtensa architecture. btw I solved the issue of restarting on illegal exception by changing the pc register. So syscalls via the ILL instruction works now. Right now it checks the value of certain registers to determine if its done by the ILL instruction intentio...
- Sat Mar 16, 2024 6:16 pm
- Forum: General Discussion
- Topic: How to set up Exception handler for Syscall
- Replies: 9
- Views: 1802
Re: How to set up Exception handler for Syscall
If its in use then oh well but is it possible to use software interrupt. On x86 you can define a software interrupt then just use int [irq number] to trigger it. Idk if thats possible on esp32. Theres an instruction ILL which always generates exception, i used that but it reboots esp32 after process...
- Fri Mar 15, 2024 6:54 pm
- Forum: General Discussion
- Topic: How to set up Exception handler for Syscall
- Replies: 9
- Views: 1802
Re: How to set up Exception handler for Syscall
I dont need a interpreter. My code runs natively on esp32 ,no translation layer. My question wasnt about Running code its about setting up an exception handler for syscall. Syscall generates an exception interrupt by design like esp32s illegal instruction or loadstoreerr cpu exceptions. I just want ...
- Fri Mar 15, 2024 11:58 am
- Forum: General Discussion
- Topic: How to set up Exception handler for Syscall
- Replies: 9
- Views: 1802
Re: How to set up Exception handler for Syscall
its an external app which gets loaded later on and is compiled on its own( Not from arduino ide but directly from assembler). I believe the syscall instruction was made for that purpose. Basically its an app calling functions from main "kernel". Think of it like how any operating system loads an exe...