2 Commits

Author	SHA1	Message	Date
robert-hh	72e67f0f02	samd/machine_bitstream: Tune ticks for SAMD51 and set pin to output. ... Changes in this commit: - Change ticks overhead value for SAMD51. The value was too large and thus timing was quite bad. At 120Mhz it's now within +/- 30ns. - Set the pin to output mode. That way, all Pin identifiers are accepted as argument, not only Pin objects. Tested with ItsyBitsy M4 and M0 boards. Signed-off-by: robert-hh <robert@hammelrath.com>	2025-10-25 22:56:47 +11:00
robert-hh	a415752173	samd/machine_bitstream: Add the machine.bitstream() function. ... The SAMD21 implementation is an adaption of @jimmo's code for STM32Lxx. The only changes are the addresses and names of the port registers and the timing parameters. SAMD21: The precision is about +/-25ns at 48MHz clock frequency. The first two cycles are about 40-60 ns longer than set. But still good enough to drive a neopixel device. SAMD51: The precision is about +/-30ns at 120MHz clock frequency. Good enough to drive a neopixel device.	2022-10-06 23:00:00 +11:00