129 lines
4.9 KiB
Rust
129 lines
4.9 KiB
Rust
#![no_std]
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extern crate alloc;
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extern crate lang_items;
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use core::fmt::Write;
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use libtock_drivers::console::Console;
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use libtock_drivers::nfc::NfcTag;
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use libtock_drivers::nfc::RecvOp;
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#[allow(dead_code)]
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/// Helper function to write a slice into a fixed
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/// length transmission buffer.
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fn write_tx_buffer(buf: &mut [u8], slice: &[u8]) {
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for (i, &byte) in slice.iter().enumerate() {
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buf[i] = byte;
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}
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}
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#[derive(PartialEq, Eq)]
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enum State {
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Enabled,
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Disabled,
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}
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fn main() {
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let mut console = Console::new();
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writeln!(console, "****************************************").unwrap();
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writeln!(console, "nfct_test application is installed").unwrap();
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let mut state = State::Disabled;
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let mut state_change_cntr = 0;
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loop {
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match state {
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State::Enabled => {
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let mut rx_buf = [0; 256];
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loop {
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match NfcTag::receive(&mut rx_buf) {
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Ok(RecvOp {
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recv_amount: amount,
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..
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}) => match amount {
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1 => writeln!(console, " -- RX Packet: {:02x?}", rx_buf[0],).unwrap(),
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2 => writeln!(
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console,
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" -- RX Packet: {:02x?} {:02x?}",
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rx_buf[0], rx_buf[1],
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)
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.unwrap(),
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3 => writeln!(
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console,
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" -- RX Packet: {:02x?} {:02x?} {:02x?}",
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rx_buf[0], rx_buf[1], rx_buf[2],
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)
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.unwrap(),
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_ => writeln!(
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console,
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" -- RX Packet: {:02x?} {:02x?} {:02x?} {:02x?}",
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rx_buf[0], rx_buf[1], rx_buf[2], rx_buf[3],
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)
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.unwrap(),
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},
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Err(_) => writeln!(console, " -- rx error!").unwrap(),
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}
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match rx_buf[0] {
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0xe0 /* RATS */=> {
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let mut answer_to_select = [0x05, 0x78, 0x80, 0xB1, 0x00];
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let amount = answer_to_select.len();
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match NfcTag::transmit(&mut answer_to_select, amount) {
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Ok(_) => (),
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Err(_) => writeln!(console, " -- tx error!").unwrap(),
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}
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}
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0xc2 /* DESELECT */ => {
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// Ignore the request
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let mut command_error = [0x6A, 0x81];
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let amount = command_error.len();
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match NfcTag::transmit(&mut command_error, amount) {
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Ok(_) => (),
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Err(_) => writeln!(console, " -- tx error!").unwrap(),
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}
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}
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0x02 | 0x03 /* APDU Prefix */ => {
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let mut reply = [rx_buf[0], 0x90, 0x00];
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let amount = reply.len();
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match NfcTag::transmit(&mut reply, amount) {
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Ok(_) => (),
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Err(_) => writeln!(console, " -- tx error!").unwrap(),
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}
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}
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0x52 | 0x50 /* WUPA | Halt */ => {
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if NfcTag::disable_emulation() {
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writeln!(console, " -- TAG DISABLED").unwrap();
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}
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state = State::Disabled;
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break;
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}
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_ => {
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}
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}
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}
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}
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State::Disabled => {
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if NfcTag::enable_emulation() {
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writeln!(console, " -- TAG ENABLED").unwrap();
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}
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// 1. Configure Type 4 tag
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if NfcTag::configure(4) {
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writeln!(console, " -- TAG CONFIGURED").unwrap();
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}
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// 2. Subscribe to a SELECTED CALLBACK
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if NfcTag::selected() {
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writeln!(console, " -- TAG SELECTED").unwrap();
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// 0xfffff results in 1048575 / 13.56e6 = 77ms
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NfcTag::set_framedelaymax(0xfffff);
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}
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state = State::Enabled;
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}
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}
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state_change_cntr += 1;
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if state_change_cntr > 10 && state == State::Disabled {
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break;
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}
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}
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writeln!(console, "****************************************").unwrap();
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}
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