If (Serial.available() > 0) Serial.println(Serial. #include "AccelStepper.h"ĪccelStepper m1(AccelStepper::DRIVER, 24, 25) ĪccelStepper m2(AccelStepper::DRIVER, 26, 27) ĪccelStepper m3(AccelStepper::DRIVER, 28, 29) I attached an exemplary code which with which the arduino cannot receive longer texts without missing bytes. But before I put all the effort in it, I wanted to discuss this with you and ask you, if you have another, better solution that for me. Solution would be to switch to interrupts when sending data, else use the main loop (sending data with interrupt works, receiving has the issue). However, if I want that arduino to confirm the new settings to the main arduino, then I will get short pauses again. Using a second arduino which only runs the steppers in the loop so the timing is no problem and serial data can be received. Because of the datatype, char, the Serial.print function chooses to output this value, by the serial monitor translated to the letter 1. My fear is that the time demand for the calculations would be quite high, if not too high, so that the arduino gets stuck in interrupts and does not execute other code anymore.Ģ. Please tell me if I'm wrong: Because of the quotes, '1', the compiler loads the value 0x49 (1 in ASCII). Of course the interrupt has to be adjusted after every step of any motor. Make the timer interrupt at exactly that time. Means: Track alls steps on every motor and calculate when a motor has to do the next step. Works like a charm except for the 0.5 s stepper pause inbetween. Right now I am sending a notification byte that data will be transfered, the arduino answers and stops the interrupt, receives the command and starts the interrupt again. I want to send commands to the arduino but with the interrupt being active some bytes never reach the arduino. This works very good with the steppers and the rest of the code except for the serial communication. I now use Timer5 of the Mega to run a function that does nothing but call all runSpeed functions every 200 µs or so. It is very important that the steppers run as smooth as possible.įirst I simply put the runSpeed function for every stepper in the main loop, resulting in stuttering when data was written to the serial by the arduino. I use AccelStepper for non blocking functions to run the steppers. Meanwhile other calculations and data transfer is to be done.Īll Steppers have their own driver with dir/step pin. All with a constant but individual speed. The interrupt routines run fine in my testing and perform read values from pins A0-A5, which will be stored into global variables (declared as volatile. As of right now, the Output Compare Registers are set to a static value (max 255) with the pre-scaler set as the clock speed. I want to drive up to 10 stepper motors at the same. I have code that has enabled all 3 timers on the arduino (0, 1, and 2) for Fast 8-bit PWM mode.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |