Search found 425 matches
- Tue Jun 11, 2019 12:11 pm
- Forum: General Discussion
- Topic: espressif's "Chip7 2-2-A" spotted in the wild
- Replies: 55
- Views: 80830
Re: espressif's "Chip7 2-2-A" spotted in the wild
Any dates yet we could expect the final announcement?
- Mon Jun 03, 2019 11:52 am
- Forum: Hardware
- Topic: Driving an 8-bit parallel 8080 bus using I2S
- Replies: 25
- Views: 38071
Re: Driving an 8-bit parallel 8080 bus using I2S
I've already tried the GPIO w1ts/w1tc byte permutation trick with a lookup table that some YouTuber made and it's not really fast. It goes up to 38FPS and the tearing is very significant and ugly. It also doesn't utilize DMA, but it's all just bitbanging. I don't think that assembly would help ther...
- Mon Jun 03, 2019 1:27 am
- Forum: Hardware
- Topic: Driving an 8-bit parallel 8080 bus using I2S
- Replies: 25
- Views: 38071
Re: Driving an 8-bit parallel 8080 bus using I2S
I heard on some hacker forums Bituni simple ripped that code off of someone else's project. Not sure but this code looks a bit sloppy and it is heavy mixed with Arduino. If you look at I2S technical reference info there are a lot of functionalities that are untouched by most of the code out there. I...
- Sat May 25, 2019 4:19 pm
- Forum: Hardware
- Topic: Writing to GPIO_OUT_REG to only specific pins
- Replies: 4
- Views: 6430
Re: Writing to GPIO_OUT_REG to only specific pins
Thanks. Well I use whole word only with needed bits so masking is not necessary.
Actually XOR operation might not be needed and data will be precalculated ready to write)
I want to use assembler instructions to repeat inline few times for speeding execution.
Actually XOR operation might not be needed and data will be precalculated ready to write)
I want to use assembler instructions to repeat inline few times for speeding execution.
- Fri May 24, 2019 2:10 pm
- Forum: Hardware
- Topic: Writing to GPIO_OUT_REG to only specific pins
- Replies: 4
- Views: 6430
Re: Writing to GPIO_OUT_REG to only specific pins
So operations steps would be:
val => W1TS
val ~= val
val => W1TC
How that would look in asm ?
val => W1TS
val ~= val
val => W1TC
How that would look in asm ?
- Fri May 24, 2019 1:40 pm
- Forum: General Discussion
- Topic: espressif's "Chip7 2-2-A" spotted in the wild
- Replies: 55
- Views: 80830
Re: espressif's "Chip7 2-2-A" spotted in the wild
May I ask - why not 2 cores?
- Thu May 23, 2019 4:23 pm
- Forum: Hardware
- Topic: Writing to GPIO_OUT_REG to only specific pins
- Replies: 4
- Views: 6430
Writing to GPIO_OUT_REG to only specific pins
Let's say I want to set 12 bits/pins simultaneously with specific values 0/1 to gpio output register but I do not want to change other bits - must be done with one 32bit word write and possibly one write instruction. Do I have to disable/enable bits with mask first? I don't want to change settings o...
- Tue May 21, 2019 3:05 am
- Forum: General Discussion
- Topic: New Chip ESP32-S2
- Replies: 42
- Views: 59102
Re: New Chip ESP32-S2
I have a feeling there will be also same chip with 2 cores and maybe BT
LCD and camera support looks great - I hope it is not through I2S only.
Also if all that extra 128MB spiram is fully addressable in continuous blocks this is a huge hardware improvement.
LCD and camera support looks great - I hope it is not through I2S only.
Also if all that extra 128MB spiram is fully addressable in continuous blocks this is a huge hardware improvement.
- Fri May 17, 2019 11:27 pm
- Forum: General Discussion
- Topic: Two Esp32 modules sharing same memory
- Replies: 1
- Views: 3444
Two Esp32 modules sharing same memory
Is it possible to connect two separate Esp32 modules in a way that they could share and access same memory?
If so - how? And would it be easy to implement in SDK?
If so - how? And would it be easy to implement in SDK?
- Thu May 09, 2019 3:25 pm
- Forum: Showcase
- Topic: I2S-parallel example: Drive a 64x32 display
- Replies: 61
- Views: 313358
Re: I2S-parallel example: Drive a 64x32 display
I wonder if the display process can be done only by CPU. I tried to drive it without I2S and it worked however my panel seems to have very strange behavior. There is something related to OE pin - must be triggered after every row or I am doing something wrong. They specify OE as active low so it act...