diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a136337
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.pdf
diff --git a/datasheet.txt b/datasheet.txt
new file mode 100644
index 0000000..3860979
--- /dev/null
+++ b/datasheet.txt
@@ -0,0 +1 @@
+https://www.st.com/content/ccc/resource/technical/document/reference_manual/group0/f3/60/ca/d2/98/c8/47/88/DM00477635/files/DM00477635.pdf/jcr:content/translations/en.DM00477635.pdf
diff --git a/dma_gpio/src/bin/main.rs b/dma_gpio/src/bin/main.rs
index 0ca109d..8e76301 100644
--- a/dma_gpio/src/bin/main.rs
+++ b/dma_gpio/src/bin/main.rs
@@ -12,6 +12,14 @@ use embassy_sync::{
 use embassy_time::{Duration, Timer};
 use {defmt_rtt as _, panic_probe as _};
 
+use embassy_stm32::{
+    gpio::{Level, Output, Speed},
+    pac::{self, GPDMA1, GPIOB, dmamux},
+    peripherals::TIM6,
+    rcc,
+    timer::low_level::Timer as LlTimer,
+};
+
 static PIPE: Pipe<CriticalSectionRawMutex, 64> = Pipe::new();
 
 #[embassy_executor::main]