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Pn532 non blocking scan (#5191)

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Alexander Dimitrov 2023-11-28 23:17:16 +02:00 committed by GitHub
parent 087733c2fd
commit 6424f831e2
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 92 additions and 48 deletions
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58
esphome/components/pn532/pn532.cpp
View file

@ -127,8 +127,18 @@ void PN532::loop() {
if (!this->requested_read_)
return;
auto ready = this->read_ready_(false);
if (ready == WOULDBLOCK)
return;
bool success = false;
std::vector<uint8_t> read;
bool success = this->read_response(PN532_COMMAND_INLISTPASSIVETARGET, read);
if (ready == READY) {
success = this->read_response(PN532_COMMAND_INLISTPASSIVETARGET, read);
} else {
this->send_ack_(); // abort still running InListPassiveTarget
}
this->requested_read_ = false;
@ -286,12 +296,58 @@ bool PN532::read_ack_() {
return matches;
}
void PN532::send_ack_() {
ESP_LOGV(TAG, "Sending ACK for abort");
this->write_data({0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00});
delay(10);
}
void PN532::send_nack_() {
ESP_LOGV(TAG, "Sending NACK for retransmit");
this->write_data({0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00});
delay(10);
}
enum PN532ReadReady PN532::read_ready_(bool block) {
if (this->rd_ready_ == READY) {
if (block) {
this->rd_start_time_ = 0;
this->rd_ready_ = WOULDBLOCK;
}
return READY;
}
if (!this->rd_start_time_) {
this->rd_start_time_ = millis();
}
while (true) {
if (this->is_read_ready()) {
this->rd_ready_ = READY;
break;
}
if (millis() - this->rd_start_time_ > 100) {
ESP_LOGV(TAG, "Timed out waiting for readiness from PN532!");
this->rd_ready_ = TIMEOUT;
break;
}
if (!block) {
this->rd_ready_ = WOULDBLOCK;
break;
}
yield();
}
auto rdy = this->rd_ready_;
if (block || rdy == TIMEOUT) {
this->rd_start_time_ = 0;
this->rd_ready_ = WOULDBLOCK;
}
return rdy;
}
void PN532::turn_off_rf_() {
ESP_LOGV(TAG, "Turning RF field OFF");
this->write_command_({

11
esphome/components/pn532/pn532.h
View file

@ -20,6 +20,12 @@ static const uint8_t PN532_COMMAND_INDATAEXCHANGE = 0x40;
static const uint8_t PN532_COMMAND_INLISTPASSIVETARGET = 0x4A;
static const uint8_t PN532_COMMAND_POWERDOWN = 0x16;
enum PN532ReadReady {
WOULDBLOCK = 0,
TIMEOUT,
READY,
};
class PN532BinarySensor;
class PN532 : public PollingComponent {
@ -54,8 +60,11 @@ class PN532 : public PollingComponent {
void turn_off_rf_();
bool write_command_(const std::vector<uint8_t> &data);
bool read_ack_();
void send_ack_();
void send_nack_();
enum PN532ReadReady read_ready_(bool block);
virtual bool is_read_ready() = 0;
virtual bool write_data(const std::vector<uint8_t> &data) = 0;
virtual bool read_data(std::vector<uint8_t> &data, uint8_t len) = 0;
virtual bool read_response(uint8_t command, std::vector<uint8_t> &data) = 0;
@ -91,6 +100,8 @@ class PN532 : public PollingComponent {
std::vector<nfc::NfcOnTagTrigger *> triggers_ontagremoved_;
std::vector<uint8_t> current_uid_;
nfc::NdefMessage *next_task_message_to_write_;
uint32_t rd_start_time_{0};
enum PN532ReadReady rd_ready_ { WOULDBLOCK };
enum NfcTask {
READ = 0,
CLEAN,

23
esphome/components/pn532_i2c/pn532_i2c.cpp
View file

@ -12,6 +12,14 @@ namespace pn532_i2c {
static const char *const TAG = "pn532_i2c";
bool PN532I2C::is_read_ready() {
uint8_t ready;
if (!this->read_bytes_raw(&ready, 1)) {
return false;
}
return ready == 0x01;
}
bool PN532I2C::write_data(const std::vector<uint8_t> &data) {
return this->write(data.data(), data.size()) == i2c::ERROR_OK;
}
@ -19,19 +27,8 @@ bool PN532I2C::write_data(const std::vector<uint8_t> &data) {
bool PN532I2C::read_data(std::vector<uint8_t> &data, uint8_t len) {
delay(1);
std::vector<uint8_t> ready;
ready.resize(1);
uint32_t start_time = millis();
while (true) {
if (this->read_bytes_raw(ready.data(), 1)) {
if (ready[0] == 0x01)
break;
}
if (millis() - start_time > 100) {
ESP_LOGV(TAG, "Timed out waiting for readiness from PN532!");
return false;
}
if (this->read_ready_(true) != pn532::PN532ReadReady::READY) {
return false;
}
data.resize(len + 1);

1
esphome/components/pn532_i2c/pn532_i2c.h
View file

@ -14,6 +14,7 @@ class PN532I2C : public pn532::PN532, public i2c::I2CDevice {
void dump_config() override;
protected:
bool is_read_ready() override;
bool write_data(const std::vector<uint8_t> &data) override;
bool read_data(std::vector<uint8_t> &data, uint8_t len) override;
bool read_response(uint8_t command, std::vector<uint8_t> &data) override;

46
esphome/components/pn532_spi/pn532_spi.cpp
View file

@ -21,6 +21,14 @@ void PN532Spi::setup() {
PN532::setup();
}
bool PN532Spi::is_read_ready() {
this->enable();
this->write_byte(0x02);
bool ready = this->read_byte() == 0x01;
this->disable();
return ready;
}
bool PN532Spi::write_data(const std::vector<uint8_t> &data) {
this->enable();
delay(2);
@ -34,24 +42,8 @@ bool PN532Spi::write_data(const std::vector<uint8_t> &data) {
}
bool PN532Spi::read_data(std::vector<uint8_t> &data, uint8_t len) {
ESP_LOGV(TAG, "Waiting for ready byte...");
uint32_t start_time = millis();
while (true) {
this->enable();
// First byte, communication mode: Read state
this->write_byte(0x02);
bool ready = this->read_byte() == 0x01;
this->disable();
if (ready)
break;
ESP_LOGV(TAG, "Not ready yet...");
if (millis() - start_time > 100) {
ESP_LOGV(TAG, "Timed out waiting for readiness from PN532!");
return false;
}
yield();
if (this->read_ready_(true) != pn532::PN532ReadReady::READY) {
return false;
}
// Read data (transmission from the PN532 to the host)
@ -72,22 +64,8 @@ bool PN532Spi::read_data(std::vector<uint8_t> &data, uint8_t len) {
bool PN532Spi::read_response(uint8_t command, std::vector<uint8_t> &data) {
ESP_LOGV(TAG, "Reading response");
uint32_t start_time = millis();
while (true) {
this->enable();
// First byte, communication mode: Read state
this->write_byte(0x02);
bool ready = this->read_byte() == 0x01;
this->disable();
if (ready)
break;
ESP_LOGV(TAG, "Not ready yet...");
if (millis() - start_time > 100) {
ESP_LOGV(TAG, "Timed out waiting for readiness from PN532!");
return false;
}
yield();
if (this->read_ready_(true) != pn532::PN532ReadReady::READY) {
return false;
}
this->enable();

1
esphome/components/pn532_spi/pn532_spi.h
View file

@ -18,6 +18,7 @@ class PN532Spi : public pn532::PN532,
void dump_config() override;
protected:
bool is_read_ready() override;
bool write_data(const std::vector<uint8_t> &data) override;
bool read_data(std::vector<uint8_t> &data, uint8_t len) override;
bool read_response(uint8_t command, std::vector<uint8_t> &data) override;