Remora - Rpi Software Stepping Using External Microcontroller via SPI

Remora was originally called spiPRU and was first operational back in 2017 running with a RPi 3B which had so so real-time capabilities. Hence offloading the real time stuff to the "PRU".

Even though Remora is built on the Mbed framework there is no RTOS involved. It's still hard interrupt driven for most accurate timing. An RTOS on the LPC1768 can't even switch a thread at the frequencies we need for step generation.

Hey scotta has there been any more Hal work for the skr1.4 so the home inputs and bed output work?
thanks

has anyone pocked at the new RPI microcontroller? i heard a rumor the next pi will have it onboard so if it has any legs it might be worth looking at now for a more powerful solution of the allwinner

Cncninja wrote:

has anyone poked at the new RPI microcontroller? i heard a rumor the next pi will have it onboard so if it has any legs it might be worth looking at now for a more powerful solution of the allwinner

 

The beaglebone pru can do more than just pwm.

Bari wrote:

I wish that the PRU's were actual FPGA's since we could do much more with them if they were.

have you looked into any of the altera/xilinx SoC boards? they have an arm core inside the fpga. machinekit guys wrote an hm2 firmware for a few boards already

Cncninja wrote:

Hey scotta has there been any more Hal work for the skr1.4 so the home inputs and bed output work?
thanks

The SKR v1.4 has been working for some time. I completed a 17hr print with it during the week. 

What issues are you having?