diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..22343c8
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "storno_cqp6xx_digital_xtal/si5351_driver"]
+	path = storno_cqp6xx_digital_xtal/si5351_driver
+	url = https://OZ1CM@bitbucket.org/oz1cm/si5351_driver.git
+[submodule "storno_cqp6xx_digital_xtal/avr_i2c_driver"]
+	path = storno_cqp6xx_digital_xtal/avr_i2c_driver
+	url = https://OZ1CM@bitbucket.org/oz1cm/avr_i2c_driver.git
diff --git a/.vs/storno_cqp6xx_digital_xtal/v14/.atsuo b/.vs/storno_cqp6xx_digital_xtal/v14/.atsuo
index 1dec0c1..b3f866f 100644
Binary files a/.vs/storno_cqp6xx_digital_xtal/v14/.atsuo and b/.vs/storno_cqp6xx_digital_xtal/v14/.atsuo differ
diff --git a/storno_cqp6xx_digital_xtal/avr_i2c_driver b/storno_cqp6xx_digital_xtal/avr_i2c_driver
new file mode 160000
index 0000000..2215dc3
--- /dev/null
+++ b/storno_cqp6xx_digital_xtal/avr_i2c_driver
@@ -0,0 +1 @@
+Subproject commit 2215dc3c1f7fbf23c21a20ba422d722431b29d27
diff --git a/storno_cqp6xx_digital_xtal/si5351_driver b/storno_cqp6xx_digital_xtal/si5351_driver
new file mode 160000
index 0000000..ba98f5b
--- /dev/null
+++ b/storno_cqp6xx_digital_xtal/si5351_driver
@@ -0,0 +1 @@
+Subproject commit ba98f5b35e40249168a080ee69d14f82a595b48f