This worked for toggling the CS automatically SPI.begin(SPI_SCK, SPI_MISO, SPI_MOSI, SPI_SS); // SCK, MISO, MOSI, SS SPI.setHwCs(true); However, it didn't result in a speedup of the overall SPI process. I measured 3uS before the SPI transfer and 6uS after the SPI transfer worth of delay when the SPI...

I’ll test it out and see if that speeds anything up. I found some docs that discussed a 1us delay acquiring a bus but I’m seeing a much larger delay.

That’s what the example code did. Is there a faster way?

https://previews.dropbox.com/p/thumb/ACHqZ7Fbn9pHOj3AmNwI3_XGYisd-u_ivTBdktcYmZhL-cviEUketfyo7R-2xnnpjcMFnt-Rq6m6aWcK539zdjBGE0Q4SbV_gsj9J6oiCRfczgKYPPHfJodeVG3mG7vEPfZdeu5oNV6hO5Tgj2vMUGngE6dEV_v00B5uX3PP-mJButK4BGYibBJHBWWXeUJKBF2Ix9MhPYuPQZ8rVzxyxf5NXrt5rpQwF9A91fDs7BUVZxWBGjU0RyCCJ8B0aVjsNTY_OV...

Although the sparkfun schematic might have those components in it, they only populate a small cap on the PCB, which is strange. Also, the sparkfun uses the 6x6 package and we use the 5x5 which has a different rated output impedance. There are references for the components used to match the 6x6 but n...

According to the datasheet, the smaller 5x5 QFN (ESP32-D2WD) part the output impedance is 35+j10 which is different than the larger 6x6 package. What matching components would be recommended that part vs the old part (which has a different output impedance)? Also, I noticed that there are no matchin...

I will have an ESP32 and an STM32 on my PCB. I need to be able to perform OTA upgrades to both. Wondering if there is a C port of the esptool that will allow me to reflash the ESP32 from the STM32? The ESP32 that I'm using only has 16mbit of flash (internal) but the STM32 has 64mbit. Planning on hav...

I'm planning on using the ESP32 along with an STM32. Is it possible to do JTAG daisy-chaining? And would both ICs need to be powered up for JTAG to work for either IC?

Thnx,
Reza

I've been able to use a 26Mhz and 40Mhz xtal in testing, but for production if 40Mhz is more supported, that's what I would like to design in. I'm considering this XTAL: http://datasheet.octopart.com/FA-128-40.0000MF10Z-K3-Epson-datasheet-86700903.pdf For other designs, I typically double the capaci...

I'm asking everyone - spent 3 days on this so far so I'm looking for all the help I can get. :) I just got a reply from visualGDB saying that they were previously using their own version of openOCD with their own flashing stubs in it. The latest beta version supports the esp32 version of openOCD and...