From 0434798439b9037a4fa5f30165879292e388f042 Mon Sep 17 00:00:00 2001 From: Caleb Jamison Date: Thu, 29 Aug 2024 12:28:23 -0400 Subject: Import otp from rp-hal, helper fns for chipid and randid Again, credit to @thejpster for doing the hard part and figuring out the otp. --- examples/rp23/src/bin/otp.rs | 46 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 examples/rp23/src/bin/otp.rs (limited to 'examples') diff --git a/examples/rp23/src/bin/otp.rs b/examples/rp23/src/bin/otp.rs new file mode 100644 index 000000000..c4d79c6ea --- /dev/null +++ b/examples/rp23/src/bin/otp.rs @@ -0,0 +1,46 @@ +//! This example shows reading the OTP constants on the RP235x. + +#![no_std] +#![no_main] + +use defmt::*; +use embassy_executor::Spawner; +use embassy_rp::block::ImageDef; +use embassy_rp::otp; +use embassy_time::Timer; +use {defmt_rtt as _, panic_probe as _}; + +#[link_section = ".start_block"] +#[used] +pub static IMAGE_DEF: ImageDef = ImageDef::secure_exe(); + +// Program metadata for `picotool info` +#[link_section = ".bi_entries"] +#[used] +pub static PICOTOOL_ENTRIES: [embassy_rp::binary_info::EntryAddr; 4] = [ + embassy_rp::binary_info::rp_program_name!(c"OTP Read Example"), + embassy_rp::binary_info::rp_cargo_version!(), + embassy_rp::binary_info::rp_program_description!(c"OTP Read Example"), + embassy_rp::binary_info::rp_program_build_attribute!(), +]; + +#[embassy_executor::main] +async fn main(_spawner: Spawner) { + let _ = embassy_rp::init(Default::default()); + // + // add some delay to give an attached debug probe time to parse the + // defmt RTT header. Reading that header might touch flash memory, which + // interferes with flash write operations. + // https://github.com/knurling-rs/defmt/pull/683 + Timer::after_millis(10).await; + + let unique_id = unwrap!(otp::get_unique_id()); + info!("Unique id:{:X}", unique_id); + + let private_rand = unwrap!(otp::get_private_random_number()); + info!("Private Rand:{:X}", private_rand); + + loop { + Timer::after_secs(1).await; + } +} -- cgit