From 7ed9e29326e42bf286b4f7c5883ef216cfb21531 Mon Sep 17 00:00:00 2001
From: Derek Hageman <hageman@inthat.cloud>
Date: Tue, 25 Jul 2023 15:54:33 -0600
Subject: rp: add async flash

Implement an async flash mode using the XIP background best effort
read interface.  Only reads are actually async, write and erase remain
blocking.
---
 tests/rp/src/bin/flash.rs | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

(limited to 'tests')

diff --git a/tests/rp/src/bin/flash.rs b/tests/rp/src/bin/flash.rs
index cf9b86df5..c31d6decf 100644
--- a/tests/rp/src/bin/flash.rs
+++ b/tests/rp/src/bin/flash.rs
@@ -6,11 +6,11 @@ mod common;
 
 use defmt::*;
 use embassy_executor::Spawner;
-use embassy_rp::flash::{ERASE_SIZE, FLASH_BASE};
+use embassy_rp::flash::{Async, ERASE_SIZE, FLASH_BASE};
 use embassy_time::{Duration, Timer};
 use {defmt_rtt as _, panic_probe as _};
 
-const ADDR_OFFSET: u32 = 0x4000;
+const ADDR_OFFSET: u32 = 0x8000;
 
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
@@ -23,7 +23,7 @@ async fn main(_spawner: Spawner) {
     // https://github.com/knurling-rs/defmt/pull/683
     Timer::after(Duration::from_millis(10)).await;
 
-    let mut flash = embassy_rp::flash::Flash::<_, { 2 * 1024 * 1024 }>::new(p.FLASH);
+    let mut flash = embassy_rp::flash::Flash::<_, Async, { 2 * 1024 * 1024 }>::new(p.FLASH, p.DMA_CH0);
 
     // Get JEDEC id
     let jedec = defmt::unwrap!(flash.jedec_id());
@@ -60,6 +60,14 @@ async fn main(_spawner: Spawner) {
         defmt::panic!("unexpected");
     }
 
+    let mut buf = [0u32; ERASE_SIZE / 4];
+
+    defmt::unwrap!(flash.background_read(ADDR_OFFSET, &mut buf)).await;
+    info!("Contents after write starts with {=u32:x}", buf[0]);
+    if buf.iter().any(|x| *x != 0xDADADADA) {
+        defmt::panic!("unexpected");
+    }
+
     info!("Test OK");
     cortex_m::asm::bkpt();
 }
-- 
cgit