Hello!
Raspberry Pi Zero 2 W.
I'm outputting data via SPI using spidev and encountered strange behavior.
When I transmit between 2 and 95 bytes, the bytes are sent with a gap of one clock pulse between them.
When I transmit 96 bytes or more, the bytes are sent without any gap.
Any ideas why this happens and how to control it?
Here are SCLK oscilloscope screenshots and the Python source code.
Raspberry Pi Zero 2 W.
I'm outputting data via SPI using spidev and encountered strange behavior.
When I transmit between 2 and 95 bytes, the bytes are sent with a gap of one clock pulse between them.
When I transmit 96 bytes or more, the bytes are sent without any gap.
Any ideas why this happens and how to control it?
Here are SCLK oscilloscope screenshots and the Python source code.
Code:
import spidevimport timespi = spidev.SpiDev()spi.open(0, 0)spi.max_speed_hz = int(2.4*1000000)dat = [0x92]*95try: while True: spi.writebytes(dat) time.sleep(0.2)except KeyboardInterrupt: print("Exit")finally: spi.close()Statistics: Posted by kapachinskij — Tue Sep 02, 2025 7:27 pm