Two things come to mind:
a) You can memory-map a partition from flash memory and then treat it as one big read-only byte array.
b) Not sure what "needs to be transmitted in a single transmission without interruption" means exactly in this case, but you can of course generate the SPI-SS signal from ...

I'm trying to use Lattice FPGA (ICE40HX8K) as peripheral to ESP32-S3 in my project, and the FPGA needs to be programmed through SPI every time at boot.

The most convenient way to program the FPGA seems to be using SPI slave configuration, where ESP32 is connected to the FPGA through SPI and ...

Same problem, timer interrupt will fail to fire in time when ESP-NOW is active, any solutions?

Here's a piece of random code I wrote to achieve bi-directional DShot:

https://github.com/wjxway/ESP32-Bidirectional-DShot

I agree that a simple 'send' option should be added, together with simple ways of registering one's own interrupts.
A lot of times it's much simpler and faster for the user to directly generate rmt_item32_t instead of writing a encoder. Not to mention registering custom interrupts could be much more ...

Hi! I'm also faced with the issue of using bi-directional Dshot on esp32, is it possible at all? Thanks!

Maybe your ISR is being mugged by another ISR? Working out of IRAM/cache will also hurt.
I have seen similar with big 2mS hits on I2C transactions to the extant that someone starting producing I2C corruptions. My guess was that Ethernet caused the ISR/bus block but not sure if device or ESP caused ...

Maybe your ISR is being mugged by another ISR? Working out of IRAM/cache will also hurt.
I have seen similar with big 2mS hits on I2C transactions to the extant that someone starting producing I2C corruptions. My guess was that Ethernet caused the ISR/bus block but not sure if device or ESP caused ...

@ESP_Sprite Thanks for your reply, now the polarity is correct and ready to go. There's just one issue left regarding timing.

I'm transferring nine 16bits data at a time, and I would like it to happen immediately after I execute the code (or after a fixed, short time delay). If no data is feed in ...

Whooo, I have managed to get it working at BCK@40MHz, that is 1.25M@16bits transfers/sec!
That is when I'm using a DAC with SPI interface, if someone is using a DAC with I2S interface, the number could ramp up to 2.5M@16bits transfers/sec!

The trick is just as described in https://esp32.com ...