Take a look at Minix it should fit and does not need an mmu.

updating to esp32 1.0.4 in board manager fixed that issue

nvs would be an ideal solution if it would only return a const char * to the value.

problem: I need to attach to different AP's so the requirement for const char * for ssid and password is making using the Arduino ide impossible. Later I will move to the IDF but the Arduino IDE is much faster than the IDF. does anyone have any suggestions? I have already tried different ways of cas...

see https://www.mikronauts.com/raspberry-pi/raspberry-pi-analog-to-digital-conversion-experiments-and-howto/ I used a 74HC138N to generate eight chip selects from three digital output. use CS0 as /EN, use three gpio's for the channel select inputs. I am trying to control 3 SPI slaves from one SPI co...

Very unfortunate. I was thinking of writing an assembly language virtual machine for my compiler... on other 32 bit risc processors an optimized assembly vm ran 4x+ faster than a C version, in anout 1/10 the space. I don't think we have any update to what is shown here: https://www.esp32.com/viewtop...

15us intervals do seem excessive. Perhaps there is a configurable parameter in the spi master library or the rtos for minimum cs enable/disable periods? If not, maybe you could use the ulp to handle the spi transactions? Or use interrupts for spi receive and handle them on the other core? Worst case...

Any luck with gpio16?

I just got my modules a few days ago.

That code sets the spi clock to 1.5Mhz, whereas the mcp3002 spec allows for 3.2mhz at 5vdc. Run the adc at 5v, use a voltage divider on miso, and increase the spi clock. Hi. I want to sample from an MCP3002 SPI ADC 100K times per second. I'm currently using the following code and only archiving abou...

Just use a timer interrupt Hi WiFive, This was the other option I was thinking of doing. I was hoping that maybe the ledc module could do this. I'd say if the timer has a period of 20 mins with a 10% duty, then a variation of 5% or less would be preferred. I'm not too familiar with the esp32's timer...