I am trying to use Neopixels on the ESP32. I need to lock out all interrupts during the high period too insure accurate timing. It look like the Ardunio function nointerrupts does not work. I have tried to use different methods to do this but have ran into issues or they did nothing noInterrupts(); ...

I would like to add an external SPI SRAM but I still need the external SPI FLASH
I under stand they map to different address but are there different SPI chip select for SRAM and FLASH?
Is there a single SPI memory that has large SRAM and FLASH? If so how would you map the address?

For a $6.50 part with all the I/O and WIFI and BT and a crappy FP unit I can not complain

There are several things to be considered on the floating point test. 1. The ESP runs out of FLASH + 64K of CACHED RAM. The RAM runs at full speed. The FLASH is clocked at 80MHz and is running in DUAL mode (2 bits per clock cycle) 200ns for a 32 bit word and 150ns for a 24bit word. The ESP32 has bot...