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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::{assert_eq, info, unwrap};
use embassy_executor::executor::Spawner;
use embassy_nrf::{interrupt, qspi};
use {defmt_rtt as _, panic_probe as _};
const PAGE_SIZE: usize = 4096;
// Workaround for alignment requirements.
// Nicer API will probably come in the future.
#[repr(C, align(4))]
struct AlignedBuf([u8; 4096]);
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let p = embassy_nrf::init(Default::default());
// Config for the MX25R64 present in the nRF52840 DK
let mut config = qspi::Config::default();
config.read_opcode = qspi::ReadOpcode::READ4IO;
config.write_opcode = qspi::WriteOpcode::PP4IO;
config.write_page_size = qspi::WritePageSize::_256BYTES;
let irq = interrupt::take!(QSPI);
let mut q: qspi::Qspi<_, 67108864> = qspi::Qspi::new(
p.QSPI, irq, p.P0_19, p.P0_17, p.P0_20, p.P0_21, p.P0_22, p.P0_23, config,
);
let mut id = [1; 3];
unwrap!(q.custom_instruction(0x9F, &[], &mut id).await);
info!("id: {}", id);
// Read status register
let mut status = [4; 1];
unwrap!(q.custom_instruction(0x05, &[], &mut status).await);
info!("status: {:?}", status[0]);
if status[0] & 0x40 == 0 {
status[0] |= 0x40;
unwrap!(q.custom_instruction(0x01, &status, &mut []).await);
info!("enabled quad in status");
}
let mut buf = AlignedBuf([0u8; PAGE_SIZE]);
let pattern = |a: u32| (a ^ (a >> 8) ^ (a >> 16) ^ (a >> 24)) as u8;
for i in 0..8 {
info!("page {:?}: erasing... ", i);
unwrap!(q.erase(i * PAGE_SIZE).await);
for j in 0..PAGE_SIZE {
buf.0[j] = pattern((j + i * PAGE_SIZE) as u32);
}
info!("programming...");
unwrap!(q.write(i * PAGE_SIZE, &buf.0).await);
}
for i in 0..8 {
info!("page {:?}: reading... ", i);
unwrap!(q.read(i * PAGE_SIZE, &mut buf.0).await);
info!("verifying...");
for j in 0..PAGE_SIZE {
assert_eq!(buf.0[j], pattern((j + i * PAGE_SIZE) as u32));
}
}
info!("done!")
}
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