Search found 9 matches

by tiradedepirate
Mon Oct 07, 2019 5:30 pm
Forum: General Discussion
Topic: ESP32 - JTAG Non-Functional w/ Stock Firmware
Replies: 2
Views: 396

Re: ESP32 - JTAG Non-Functional w/ Stock Firmware

Thanks @krzychb for the quick reply. :)
I found another post which the author said he could erase the firmware via JTAG, and then program.
by tiradedepirate
Sun Oct 06, 2019 8:53 pm
Forum: General Discussion
Topic: ESP32 - JTAG Non-Functional w/ Stock Firmware
Replies: 2
Views: 396

ESP32 - JTAG Non-Functional w/ Stock Firmware

Hello Everyone, I purchased 4 raw ESP32-WROOM-32 modules from Digi-key, soldered them to my hardware, and then attempt to flash them over the JTAG interface. Every attempt of programming the module left me with the dreaded all ones seen blah blah blah error. All of the existing documentation online ...
by tiradedepirate
Wed Jan 30, 2019 5:34 pm
Forum: General Discussion
Topic: DSP coprocessor?
Replies: 3
Views: 2764

Re: DSP coprocessor?

Hello,

I'm curious if anyone successfully completed the port?
by tiradedepirate
Mon Jan 21, 2019 12:29 am
Forum: ESP32 IDF
Topic: ESP32 Cosine Generator to SPI via DMA
Replies: 7
Views: 1383

Re: ESP32 Cosine Generator to SPI via DMA

I did a few experiments and Nyquist seems to be fine based on the outputs of the FFTs post the output of the receiver. Thanks!
by tiradedepirate
Sun Jan 20, 2019 6:43 pm
Forum: ESP32 IDF
Topic: ESP32 Cosine Generator to SPI via DMA
Replies: 7
Views: 1383

Re: ESP32 Cosine Generator to SPI via DMA

Gotcha. Hmm. This means that you almost need a 'streaming' mode for a SPI transaction, like the I2S peripheral has. At the moment, the driver has nothing of that kind, but the hardware supports it; worst case you could hack the driver to get something like this. Okay cool! I'm guessing the I2S driv...
by tiradedepirate
Sat Jan 19, 2019 8:51 pm
Forum: ESP32 IDF
Topic: ESP32 Cosine Generator to SPI via DMA
Replies: 7
Views: 1383

Re: ESP32 Cosine Generator to SPI via DMA

What does the SPI communication you have to do look like? Can you send a number of samples at one time to the chip, and will it 'play them back' at an independent, fixed speed, or do you have to send it a new SPI sample precisely in time with the sample rate? Hello Sprite, Thanks for the response a...
by tiradedepirate
Thu Jan 17, 2019 4:48 am
Forum: ESP32 IDF
Topic: ESP32 Cosine Generator to SPI via DMA
Replies: 7
Views: 1383

Re: ESP32 Cosine Generator to SPI via DMA

Thanks for the quick response! I agree it's not that hard. The real issue is with SPI communications / possibly inexperience. I have to send a large amount of data using tones (BELL202). The tones are emulated via an external DAC over SPI. I end up pushing SPI pretty hard with the current driver (9u...
by tiradedepirate
Tue Jan 15, 2019 5:18 am
Forum: ESP32 IDF
Topic: ESP32 Cosine Generator to SPI via DMA
Replies: 7
Views: 1383

ESP32 Cosine Generator to SPI via DMA

Hello, I'm attempting to utilize the ESP32 with the CC1120 in CFM (custom frequency modulation) mode. This mode requires me to write the deviation required for the modulation scheme require to a register. The issue is obviously SPI comm based. I simply cannot get the speed out of the SPI peripherals...

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