Arduino 3.x tracks which peripheral owns each pin and logs when a pin the
SPI bus owns is used through digitalRead()/digitalWrite(). The vendored
SmartRC-CC1101 driver does both:
- Every register access waits for CHIP_RDYn with digitalRead(MISO): one
"IO 19 is not set as GPIO" warning per access, about one every 4 s from
the RSSI read in decodeFrame(). It now reads the pad with gpio_get_level(),
which returns the same level without the ownership check.
- Init() set SCK and MOSI with digitalWrite() after SpiStart(), which the core
refused with an error each boot. The writes are gone; the bus idles them.
The MISO wait also had no bound, so a missing or dead module hung the caller.
It now gives up after 10 ms.
No native test: the driver only builds for the ESP32. To check on hardware:
the serial log should have no "is not set as GPIO" lines, and frames should
still decode with an RSSI.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Copied from the registry package lsatan/SmartRC-CC1101-Driver-Lib@2.5.7
(upstream unmaintained since 2021) so it can be fixed for Arduino 3.x in
the next commit. This commit is the untouched copy, so that diff shows
every change. Licence: LICENSE.txt ("permission to modify and publish").
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
