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#![no_std]
#![no_main]
use defmt::{info, unwrap};
use embassy_executor::Spawner;
use embassy_nrf::gpio::{Level, Output, OutputDrive};
use embassy_nrf::{bind_interrupts, peripherals, spim};
use {defmt_rtt as _, panic_probe as _};
bind_interrupts!(struct Irqs {
SPIM3 => spim::InterruptHandler<peripherals::SPI3>;
});
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let p = embassy_nrf::init(Default::default());
info!("running!");
let mut config = spim::Config::default();
config.frequency = spim::Frequency::M16;
let mut spim = spim::Spim::new(p.SPI3, Irqs, p.P0_29, p.P0_28, p.P0_30, config);
let mut ncs = Output::new(p.P0_31, Level::High, OutputDrive::Standard);
// Example on how to talk to an ENC28J60 chip
// softreset
cortex_m::asm::delay(10);
ncs.set_low();
cortex_m::asm::delay(5);
let tx = [0xFF];
unwrap!(spim.transfer(&mut [], &tx).await);
cortex_m::asm::delay(10);
ncs.set_high();
cortex_m::asm::delay(100000);
let mut rx = [0; 2];
// read ESTAT
cortex_m::asm::delay(5000);
ncs.set_low();
cortex_m::asm::delay(5000);
let tx = [0b000_11101, 0];
unwrap!(spim.transfer(&mut rx, &tx).await);
cortex_m::asm::delay(5000);
ncs.set_high();
info!("estat: {=[?]}", rx);
// Switch to bank 3
cortex_m::asm::delay(10);
ncs.set_low();
cortex_m::asm::delay(5);
let tx = [0b100_11111, 0b11];
unwrap!(spim.transfer(&mut rx, &tx).await);
cortex_m::asm::delay(10);
ncs.set_high();
// read EREVID
cortex_m::asm::delay(10);
ncs.set_low();
cortex_m::asm::delay(5);
let tx = [0b000_10010, 0];
unwrap!(spim.transfer(&mut rx, &tx).await);
cortex_m::asm::delay(10);
ncs.set_high();
info!("erevid: {=[?]}", rx);
}
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