Add USB serial stdout for RP2040

Builds on the capabilities of the BSP. Unlike the other hardare-specific
packages, I'm using alloc for conveying stdout messages. Check out the
imxrt stdout package for a different approach.

1 files changed, 3 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 4681439..2d81c96 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,6 +25,9 @@ imxrt1170 = { git = "https://git.mciantyre.dev/imxrt-drivers" }
 
 ral-registers = { version = "0.2" }
 
+usb-device = "0.3"
+usbd-serial = "0.2"
+
 [patch.crates-io]
 cortex-m = { git = "https://github.com/rust-embedded/cortex-m", rev = "8c62cc47314445346851b0d0664f9cc34c50b24d" }
 imxrt-ral = {