Hi Jerry, 1 millisecond is probably asking too much of LC. It doesn’t give an LC processor enough time to do much of anything else and I can see why just moving the mouse would affect the speed of the motor. I’m assuming that what you really want is a steady rate for the motor rather than a variable one.
Try some experiments with increasing the amount of time in-between motor steps if you can. You may find a balance somewhere that is acceptable. I also found this comparison of Banana Pi Vs. Raspberry Pi 3 which you may also find useful. Good luck! Rick Banana Pi M3 Vs Raspberry Pi 3 Benchmark Aspects Banana Pi M3 Raspberry Pi 3 Processor ARM V7 Cortex A7 ARM V8 Cortex A53 Frequency 1.8GHz 1.2GHz CPU Cores 8 4 RAM 2GB DDR3 1GB DDR2 SoC A83T BCM2837 Storage Micro SD/USB SATA 2.0 Micro SD <https://www.raspberrypistarterkits.com/accessories/top-micro-sd-cards-raspberry-pi/> Onboard Storage 8GB eMMC No GPU PowerVR SGX544MP Broadcom VideoCore IV GPU Speed 700MHz 400MHz GPIO Pins 40 40 USB 2.0 2 + 1 OTG 4 Power <https://www.raspberrypistarterkits.com/accessories/best-raspberry-pi-power-supply/> 5V 2A 5V 2.5A > On Jan 1, 2021, at 11:20 AM, JeeJeeStudio via use-livecode > <use-livecode@lists.runrev.com> wrote: > > Hi Rick, > > thanks fo responding. > > It's a Pi 3 model B+, should be fast enough for this simple task. > > on clockWise > -------------------------steps between pos and wait---------------- > repeat for sStp times --clockwise > Pi_gpio_output 20, 0 --dir > Pi_gpio_output 21, 1 --step > wait sSpd milliseconds with messages > Pi_gpio_output 21, 0 > wait sSpd milliseconds with messages > if the mouse is down > then > Pi_gpio_output 21, 0 --step > set the label of me to "Start" > exit repeat > end if > end repeat > end clockWise > > The time between a 1 and a 0 on the output is 1ms. I can lower the speed and > thus increase time, but that does not matter. > > I think I tried it once with send in time, not a succes. So maybe i have to > rewrite that with a different mindsetting. I don't have all stack with me at > the moment. > > The above piece is from an older stack, but the last is similar. > > Also the wait shall not be the most convenient wait to handle this. > > It also has of course an counterClockwise handler which is similar, but then > output 20 is a 1. > > it should run for so many steps, then wait a few seconds and then return. If > there is one position. If there are more positions, it should go to those > positions too with eqaul steps, then wait on each position, then return those > same positions to the start. > > It all works, but due to the single thread, moving the mouse, it interferes. > So in fact LC is to heavy for a single thread. Guess we would win speed if we > got multi-thread. Not just for Raspberry. > > Then there is still max LC7.0 for Rasp, so a port to that should also be made. > > Thanks. > > Jerry > > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
