raspberrypi-pico: Add link to firmware repo

Since the Raspberry Pi Pico is a programmable device with a myriad of
use-cases, it needs specific firmware to implement the same protocol as
the driver in src/hardware/raspberrypi-pico.

Add a link to make it easier to find the right firmware.

diff --git a/src/hardware/raspberrypi-pico/protocol.h b/src/hardware/raspberrypi-pico/protocol.h
index 45a8a2a3ff94b4c37d87753869ce9a2127f8d50a..10b89cce8eb6d2d5fa9a00b1c94dd41b01389438 100644 (file)
--- a/src/hardware/raspberrypi-pico/protocol.h
+++ b/src/hardware/raspberrypi-pico/protocol.h
@@ -20,6 +20,8 @@
 #ifndef LIBSIGROK_HARDWARE_RASPBERRYPI_PICO_PROTOCOL_H
 #define LIBSIGROK_HARDWARE_RASPBERRYPI_PICO_PROTOCOL_H
 
+/* Firmware: https://github.com/pico-coder/sigrok-pico */
+
 #include <stdint.h>
 #include <glib.h>
 #include <libsigrok/libsigrok.h>