我目前正在尝试使用我的 arduino uno 设备运行 HCE，该设备安装有 Seeed NFC Shield V 2.0
我正在使用来自https://github.com/Seeed-Studio/PN532/blob/master/PN532/examples/android_hce/android_hce.ino的示例代码
#include <SPI.h>
#include <PN532_SPI.h>
#include <PN532Interface.h>
#include <PN532.h>
PN532_SPI pn532spi(SPI, 10);
PN532 nfc(pn532spi);
void setup()
{
Serial.begin(115200);
Serial.println("-------Peer to Peer HCE--------");
nfc.begin();
uint32_t versiondata = nfc.getFirmwareVersion();
if (! versiondata) {
Serial.print("Didn't find PN53x board");
while (1); // halt
}
// Got ok data, print it out!
Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX);
Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC);
Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
// Set the max number of retry attempts to read from a card
// This prevents us from waiting forever for a card, which is
// the default behaviour of the PN532.
//nfc.setPassiveActivationRetries(0xFF);
// configure board to read RFID tags
nfc.SAMConfig();
}
void loop()
{
bool success;
uint8_t responseLength = 32;
Serial.println("Waiting for an ISO14443A card");
// set shield to inListPassiveTarget
success = nfc.inListPassiveTarget();
if(success) {
Serial.println("Found something!");
uint8_t selectApdu[] = { 0x00, /* CLA */
0xA4, /* INS */
0x04, /* P1 */
0x00, /* P2 */
0x07, /* Length of AID */
0xF0, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* AID defined on Android App */
0x00 /* Le */ };
uint8_t response[32];
success = nfc.inDataExchange(selectApdu, sizeof(selectApdu), response, &responseLength);
if(success) {
Serial.print("responseLength: "); Serial.println(responseLength);
nfc.PrintHexChar(response, responseLength);
do {
uint8_t apdu[] = "Hello from Arduino";
uint8_t back[32];
uint8_t length = 32;
success = nfc.inDataExchange(apdu, sizeof(apdu), back, &length);
if(success) {
Serial.print("responseLength: "); Serial.println(length);
nfc.PrintHexChar(back, length);
}
else {
Serial.println("Broken connection?");
}
}
while(success);
}
else {
Serial.println("Failed sending SELECT AID");
}
}
else {
Serial.println("Didn't find anything!");
}
delay(1000);
}
void printResponse(uint8_t *response, uint8_t responseLength) {
String respBuffer;
for (int i = 0; i < responseLength; i++) {
if (response[i] < 0x10)
respBuffer = respBuffer + "0"; //Adds leading zeros if hex value is smaller than 0x10
respBuffer = respBuffer + String(response[i], HEX) + " ";
}
Serial.print("response: "); Serial.println(respBuffer);
}
void setupNFC() {
nfc.begin();
uint32_t versiondata = nfc.getFirmwareVersion();
if (! versiondata) {
Serial.print("Didn't find PN53x board");
while (1); // halt
}
// Got ok data, print it out!
Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX);
Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC);
Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
// configure board to read RFID tags
nfc.SAMConfig();
}
我的 android 代码取自 HCE 开发指南，我还尝试了代码形式https://github.com/grundid/host-card-emulation-sample
我的问题是，arduino 代码甚至无法识别标签。所以我得到的是：
Waiting for an ISO14443A card
Didn't find anything!
Waiting for an ISO14443A card
Didn't find anything!
Waiting for an ISO14443A card
事实上，在 Android 端，我没有收到任何数据包，也没有播放花哨的 NFC 声音，这通常表明至少发生了一些事情。所以我的问题是，是否有人尝试将 Galaxy S3 与 cyanogenmod 10 以及 HCE 支持一起使用。我真的没有任何想法，我对我的代码进行了三次检查，在这里阅读了很多关于 SO 的问题，但所有人都至少从 NFC Shield 收到了一些东西。
我知道常见的 NFC 模式可以正常工作，因为我有一个在“正常”模式下使用 NFC 的应用程序。当我在我的 arduino 上运行这个 NFC 协议时，所有应用程序都会收到一个数据包，（尽管它们无法正确路由它们，因为它们不是 adpu 数据包）