SUServo: apply bit masks to servo memory writes to prevent overflows

Signed-off-by: TPH <thomas.harty@physics.ox.ac.uk>
2019-02-07 15:43:18 +00:00 · 2019-02-07 15:43:18 +00:00 · 0ebff04ad7
commit 0ebff04ad7
parent f6142816b8
1 changed files with 1 additions and 0 deletions
--- a/artiq/coredevice/suservo.py
+++ b/artiq/coredevice/suservo.py
@ -130,6 +130,7 @@ class SUServo:
        :param value: Data to be written.
        """
        addr |= WE
+        value &= (1 << COEFF_WIDTH) - 1
        value |= (addr >> 8) << COEFF_WIDTH
        addr = addr & 0xff
        rtio_output((self.channel << 8) | addr, value)