Hi eng, I improved the system:
i added more inputs and outputs as well as pwm option.
GPIO 2 -> OUT-00 or PWM-00
GPIO 4 -> OUT-01 or PWM-01
GPIO 25 -> OUT-02 or PWM-02
GPIO 1 -> OUT-03 or PWM-03
GPIO 14 -> OUT-04 or PWM-04
GPIO 15 -> OUT-05 or PWM-05
GPIO 26 <- IN-00 {pullup}
GPIO 27 <- IN-01 {pullup}
GPIO 32 <- IN-02 {pullup}
GPIO 33 <- IN-03 {pullup}
GPIO 34 <- IN-04 {no pullup}
GPIO 35 <- IN-05 {no pullup}
GPIO 36 <- IN-06 {no pullup}
GPIO 39 <- IN-07 {no pullup}
GPIO 12 -> step-0
GPIO 13 -> dir-0
GPIO 16 -> step-1
GPIO 17 -> dir-1
GPIO 21 -> step-2
GPIO 22 -> dir-2
GPIO 5 -> W5500 SCS
GPIO 18 -> W5500 SCLK
GPIO 19 <- W5500 MISO
GPIO 23 -> W5500 MOSI
In the ethernet library, I modified the SPI frequency in the w5500.h file because sometimes the data transfer was faulty.
I used a new method to calculate the step period time, which is faster. So the step frequency may be higher, but I can't control it because my machine can't do more than 40 kHz.
pwm can be activated on the outputs by setting the value of the parameter udp.pwm.xx.freq (1...65000 Hz)
The pwm duty ratio can be set on pin udp.pwm.xx (0 ... 1)
