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Tasmota/tasmota/xdrv_23_zigbee_9_serial.ino

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EZSP milestone 2
2020-06-19 19:54:37 +01:00
/*
xdrv_23_zigbee_9_serial.ino - zigbee: serial communication with MCU
Copyright (C) 2020 Theo Arends and Stephan Hadinger
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_ZIGBEE
#ifdef USE_ZIGBEE_ZNP
const uint32_t ZIGBEE_BUFFER_SIZE = 256; // Max ZNP frame is SOF+LEN+CMD1+CMD2+250+FCS = 255
const uint8_t ZIGBEE_SOF = 0xFE;
const uint8_t ZIGBEE_SOF_ALT = 0xFF;
#endif // USE_ZIGBEE_ZNP
#ifdef USE_ZIGBEE_EZSP
const uint32_t ZIGBEE_BUFFER_SIZE = 256;
const uint8_t ZIGBEE_EZSP_CANCEL = 0x1A; // cancel byte
const uint8_t ZIGBEE_EZSP_EOF = 0x7E; // end of frame
const uint8_t ZIGBEE_EZSP_ESCAPE = 0x7D; // escape byte
class EZSP_Serial_t {
public:
uint8_t to_ack = 0; // 0..7, frame number of next id to send
uint8_t from_ack = 0; // 0..7, frame to ack
uint8_t ezsp_seq = 0; // 0..255, EZSP sequence number
};
EZSP_Serial_t EZSP_Serial;
#endif // USE_ZIGBEE_EZSP
#include <TasmotaSerial.h>
TasmotaSerial *ZigbeeSerial = nullptr;
/********************************************************************************************/
//
// Called at event loop, checks for incoming data from the CC2530
//
void ZigbeeInputLoop(void) {
#ifdef USE_ZIGBEE_ZNP
static uint32_t zigbee_polling_window = 0; // number of milliseconds since first byte
static uint8_t fcs = ZIGBEE_SOF;
static uint32_t zigbee_frame_len = 5; // minimal zigbee frame length, will be updated when buf[1] is read
// Receive only valid ZNP frames:
// 00 - SOF = 0xFE
// 01 - Length of Data Field - 0..250
// 02 - CMD1 - first byte of command
// 03 - CMD2 - second byte of command
// 04..FD - Data Field
// FE (or last) - FCS Checksum
while (ZigbeeSerial->available()) {
yield();
uint8_t zigbee_in_byte = ZigbeeSerial->read();
//AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZbInput byte=%d len=%d"), zigbee_in_byte, zigbee_buffer->len());
if (0 == zigbee_buffer->len()) { // make sure all variables are correctly initialized
zigbee_frame_len = 5;
fcs = ZIGBEE_SOF;
// there is a rare race condition when an interrupt occurs when receiving the first byte
// in this case the first bit (lsb) is missed and Tasmota receives 0xFF instead of 0xFE
// We forgive this mistake, and next bytes are automatically resynchronized
if (ZIGBEE_SOF_ALT == zigbee_in_byte) {
AddLog_P2(LOG_LEVEL_INFO, PSTR("ZbInput forgiven first byte %02X (only for statistics)"), zigbee_in_byte);
zigbee_in_byte = ZIGBEE_SOF;
}
}
if ((0 == zigbee_buffer->len()) && (ZIGBEE_SOF != zigbee_in_byte)) {
// waiting for SOF (Start Of Frame) byte, discard anything else
AddLog_P2(LOG_LEVEL_INFO, PSTR("ZbInput discarding byte %02X"), zigbee_in_byte);
continue; // discard
}
if (zigbee_buffer->len() < zigbee_frame_len) {
zigbee_buffer->add8(zigbee_in_byte);
zigbee_polling_window = millis(); // Wait for more data
fcs ^= zigbee_in_byte;
}
if (zigbee_buffer->len() >= zigbee_frame_len) {
zigbee_polling_window = 0; // Publish now
break;
}
// recalculate frame length
if (02 == zigbee_buffer->len()) {
// We just received the Lenght byte
uint8_t len_byte = zigbee_buffer->get8(1);
if (len_byte > 250) len_byte = 250; // ZNP spec says len is 250 max
zigbee_frame_len = len_byte + 5; // SOF + LEN + CMD1 + CMD2 + FCS = 5 bytes overhead
}
}
if (zigbee_buffer->len() && (millis() > (zigbee_polling_window + ZIGBEE_POLLING))) {
char hex_char[(zigbee_buffer->len() * 2) + 2];
ToHex_P((unsigned char*)zigbee_buffer->getBuffer(), zigbee_buffer->len(), hex_char, sizeof(hex_char));
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR(D_LOG_ZIGBEE "Bytes follow_read_metric = %0d"), ZigbeeSerial->getLoopReadMetric());
// buffer received, now check integrity
if (zigbee_buffer->len() != zigbee_frame_len) {
// Len is not correct, log and reject frame
AddLog_P2(LOG_LEVEL_INFO, PSTR(D_JSON_ZIGBEEZNPRECEIVED ": received frame of wrong size %s, len %d, expected %d"), hex_char, zigbee_buffer->len(), zigbee_frame_len);
} else if (0x00 != fcs) {
// FCS is wrong, packet is corrupt, log and reject frame
AddLog_P2(LOG_LEVEL_INFO, PSTR(D_JSON_ZIGBEEZNPRECEIVED ": received bad FCS frame %s, %d"), hex_char, fcs);
} else {
// frame is correct
//AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR(D_JSON_ZIGBEEZNPRECEIVED ": received correct frame %s"), hex_char);
SBuffer znp_buffer = zigbee_buffer->subBuffer(2, zigbee_frame_len - 3); // remove SOF, LEN and FCS
ToHex_P((unsigned char*)znp_buffer.getBuffer(), znp_buffer.len(), hex_char, sizeof(hex_char));
Response_P(PSTR("{\"" D_JSON_ZIGBEEZNPRECEIVED "\":\"%s\"}"), hex_char);
if (Settings.flag3.tuya_serial_mqtt_publish) {
MqttPublishPrefixTopic_P(TELE, PSTR(D_RSLT_SENSOR));
XdrvRulesProcess();
} else {
AddLog_P2(LOG_LEVEL_DEBUG, PSTR(D_LOG_ZIGBEE "%s"), mqtt_data);
}
// now process the message
ZigbeeProcessInput(znp_buffer);
}
zigbee_buffer->setLen(0); // empty buffer
}
#endif // USE_ZIGBEE_ZNP
#ifdef USE_ZIGBEE_EZSP
static uint32_t zigbee_polling_window = 0; // number of milliseconds since first byte
static bool escape = false; // was the previous byte an escape?
bool frame_complete = false; // frame is ready and complete
// Receive only valid EZSP frames:
// 1A - Cancel - cancel all previous bytes
// 7D - Escape byte - following byte is escaped
// 7E - end of frame
while (ZigbeeSerial->available()) {
yield();
uint8_t zigbee_in_byte = ZigbeeSerial->read();
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZIG: ZbInput byte=0x%02X len=%d"), zigbee_in_byte, zigbee_buffer->len());
// if (0 == zigbee_buffer->len()) { // make sure all variables are correctly initialized
// escape = false;
// frame_complete = false;
// }
if ((0x11 == zigbee_in_byte) || (0x13 == zigbee_in_byte)) {
continue; // ignore reserved bytes XON/XOFF
}
if (ZIGBEE_EZSP_ESCAPE == zigbee_in_byte) {
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZIG: Escape byte received"));
escape = true;
continue;
}
if (ZIGBEE_EZSP_CANCEL == zigbee_in_byte) {
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZIG: ZbInput byte=0x1A, cancel byte received, discarding %d bytes"), zigbee_buffer->len());
zigbee_buffer->setLen(0); // empty buffer
escape = false;
frame_complete = false;
continue; // re-loop
}
if (ZIGBEE_EZSP_EOF == zigbee_in_byte) {
// end of frame
frame_complete = true;
break;
}
if (zigbee_buffer->len() < ZIGBEE_BUFFER_SIZE) {
if (escape) {
// invert bit 5
zigbee_in_byte ^= 0x20;
escape = false;
}
zigbee_buffer->add8(zigbee_in_byte);
zigbee_polling_window = millis(); // Wait for more data
} // adding bytes
} // while (ZigbeeSerial->available())
uint32_t frame_len = zigbee_buffer->len();
if (frame_complete || (frame_len && (millis() > (zigbee_polling_window + ZIGBEE_POLLING)))) {
char hex_char[frame_len * 2 + 2];
ToHex_P((unsigned char*)zigbee_buffer->getBuffer(), zigbee_buffer->len(), hex_char, sizeof(hex_char));
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR(D_LOG_ZIGBEE "Bytes follow_read_metric = %0d"), ZigbeeSerial->getLoopReadMetric());
if ((frame_complete) && (frame_len >= 3)) {
// frame received and has at least 3 bytes (without EOF), checking CRC
// AddLog_P2(LOG_LEVEL_INFO, PSTR(D_JSON_ZIGBEE_EZSP_RECEIVED ": received raw frame %s"), hex_char);
uint16_t crc = 0xFFFF; // frame CRC
// compute CRC
for (uint32_t i=0; i<frame_len-2; i++) {
crc = crc ^ ((uint16_t)zigbee_buffer->get8(i) << 8);
for (uint32_t i=0; i<8; i++) {
if (crc & 0x8000) {
crc = (crc << 1) ^ 0x1021; // polynom is x^16 + x^12 + x^5 + 1, CCITT standard
} else {
crc <<= 1;
}
}
}
uint16_t crc_received = zigbee_buffer->get8(frame_len - 2) << 8 | zigbee_buffer->get8(frame_len - 1);
// remove 2 last bytes
if (crc_received != crc) {
AddLog_P2(LOG_LEVEL_INFO, PSTR(D_JSON_ZIGBEE_EZSP_RECEIVED ": bad crc (received 0x%04X, computed 0x%04X) %s"), crc_received, crc, hex_char);
} else {
// copy buffer
SBuffer ezsp_buffer = zigbee_buffer->subBuffer(0, frame_len - 2); // CRC
// CRC is correct, apply de-stuffing if DATA frame
if (0 == (ezsp_buffer.get8(0) & 0x80)) {
// DATA frame
uint8_t rand = 0x42;
for (uint32_t i=1; i<ezsp_buffer.len(); i++) {
ezsp_buffer.set8(i, ezsp_buffer.get8(i) ^ rand);
if (rand & 1) { rand = (rand >> 1) ^ 0xB8; }
else { rand = (rand >> 1); }
}
}
ToHex_P((unsigned char*)ezsp_buffer.getBuffer(), ezsp_buffer.len(), hex_char, sizeof(hex_char));
Response_P(PSTR("{\"" D_JSON_ZIGBEE_EZSP_RECEIVED "2\":\"%s\"}"), hex_char);
if (Settings.flag3.tuya_serial_mqtt_publish) {
MqttPublishPrefixTopic_P(TELE, PSTR(D_RSLT_SENSOR));
XdrvRulesProcess();
} else {
AddLog_P2(LOG_LEVEL_DEBUG, PSTR(D_LOG_ZIGBEE "%s"), mqtt_data); // TODO move to LOG_LEVEL_DEBUG when stable
}
// now process the message
ZigbeeProcessInputRaw(ezsp_buffer);
}
} else {
// the buffer timed-out, print error and discard
AddLog_P2(LOG_LEVEL_INFO, PSTR(D_JSON_ZIGBEE_EZSP_RECEIVED ": time-out, discarding %s, %d"), hex_char);
}
zigbee_buffer->setLen(0); // empty buffer
escape = false;
frame_complete = false;
}
#endif // USE_ZIGBEE_EZSP
}
/********************************************************************************************/
// Initialize internal structures
void ZigbeeInitSerial(void)
{
// AddLog_P2(LOG_LEVEL_INFO, PSTR("ZigbeeInit Mem1 = %d"), ESP_getFreeHeap());
zigbee.active = false;
if (PinUsed(GPIO_ZIGBEE_RX) && PinUsed(GPIO_ZIGBEE_TX)) {
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR(D_LOG_ZIGBEE "GPIOs Rx:%d Tx:%d"), Pin(GPIO_ZIGBEE_RX), Pin(GPIO_ZIGBEE_TX));
// if seriallog_level is 0, we allow GPIO 13/15 to switch to Hardware Serial
ZigbeeSerial = new TasmotaSerial(Pin(GPIO_ZIGBEE_RX), Pin(GPIO_ZIGBEE_TX), seriallog_level ? 1 : 2, 0, 256); // set a receive buffer of 256 bytes
ZigbeeSerial->begin(115200);
if (ZigbeeSerial->hardwareSerial()) {
ClaimSerial();
uint32_t aligned_buffer = ((uint32_t)serial_in_buffer + 3) & ~3;
zigbee_buffer = new PreAllocatedSBuffer(sizeof(serial_in_buffer) - 3, (char*) aligned_buffer);
} else {
// AddLog_P2(LOG_LEVEL_INFO, PSTR("ZigbeeInit Mem2 = %d"), ESP_getFreeHeap());
zigbee_buffer = new SBuffer(ZIGBEE_BUFFER_SIZE);
// AddLog_P2(LOG_LEVEL_INFO, PSTR("ZigbeeInit Mem3 = %d"), ESP_getFreeHeap());
}
zigbee.active = true;
zigbee.init_phase = true; // start the state machine
zigbee.state_machine = true; // start the state machine
ZigbeeSerial->flush();
}
// AddLog_P2(LOG_LEVEL_INFO, PSTR("ZigbeeInit Mem9 = %d"), ESP_getFreeHeap());
}
#ifdef USE_ZIGBEE_ZNP
void ZigbeeZNPSend(const uint8_t *msg, size_t len) {
if ((len < 2) || (len > 252)) {
// abort, message cannot be less than 2 bytes for CMD1 and CMD2
AddLog_P2(LOG_LEVEL_DEBUG, PSTR(D_JSON_ZIGBEEZNPSENT ": bad message len %d"), len);
return;
}
uint8_t data_len = len - 2; // removing CMD1 and CMD2
if (ZigbeeSerial) {
uint8_t fcs = data_len;
ZigbeeSerial->write(ZIGBEE_SOF); // 0xFE
//AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZNPSend SOF %02X"), ZIGBEE_SOF);
ZigbeeSerial->write(data_len);
//AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZNPSend LEN %02X"), data_len);
for (uint32_t i = 0; i < len; i++) {
uint8_t b = pgm_read_byte(msg + i);
ZigbeeSerial->write(b);
fcs ^= b;
//AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZNPSend byt %02X"), b);
}
ZigbeeSerial->write(fcs); // finally send fcs checksum byte
//AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZNPSend FCS %02X"), fcs);
}
// Now send a MQTT message to report the sent message
char hex_char[(len * 2) + 2];
AddLog_P2(LOG_LEVEL_DEBUG, PSTR(D_LOG_ZIGBEE D_JSON_ZIGBEEZNPSENT " %s"),
ToHex_P(msg, len, hex_char, sizeof(hex_char)));
}
//
// Same code for `ZbZNPSend` and `ZbZNPReceive`
// building the complete message (intro, length)
//
void CmndZbZNPSendOrReceive(bool send)
{
if (ZigbeeSerial && (XdrvMailbox.data_len > 0)) {
uint8_t code;
char *codes = RemoveSpace(XdrvMailbox.data);
int32_t size = strlen(XdrvMailbox.data);
SBuffer buf((size+1)/2);
while (size > 1) {
char stemp[3];
strlcpy(stemp, codes, sizeof(stemp));
code = strtol(stemp, nullptr, 16);
buf.add8(code);
size -= 2;
codes += 2;
}
if (send) {
// Command was `ZbZNPSend`
ZigbeeZNPSend(buf.getBuffer(), buf.len());
} else {
// Command was `ZbZNPReceive`
ZigbeeProcessInput(buf);
}
}
ResponseCmndDone();
}
// For debug purposes only, simulates a message received
void CmndZbZNPReceive(void)
{
CmndZbZNPSendOrReceive(false);
}
void CmndZbZNPSend(void)
{
CmndZbZNPSendOrReceive(true);
}
#endif // USE_ZIGBEE_ZNP
#ifdef USE_ZIGBEE_EZSP
// internal function to output a byte, and escape it (stuffing) if needed
void ZigbeeEZSPSend_Out(uint8_t out_byte) {
switch (out_byte) {
case 0x7E: // Flag byte
case 0x11: // XON
case 0x13: // XOFF
case 0x18: // Substitute byte
case 0x1A: // Cancel byte
case 0x7D: // Escape byte
// case 0xFF: // special wake-up
ZigbeeSerial->write(ZIGBEE_EZSP_ESCAPE); // send Escape byte 0x7D
ZigbeeSerial->write(out_byte ^ 0x20); // send with bit 5 inverted
break;
default:
ZigbeeSerial->write(out_byte); // send unchanged
break;
}
}
// Send low-level EZSP frames
//
// The frame should contain the Control Byte and Data Field
// The frame shouldn't be escaped, nor randomized
//
// Before sending:
// - send Cancel byte (0x1A) if requested
// - randomize Data Field if DATA Frame
// - compute CRC16
// - escape (stuff) reserved bytes
// - add EOF (0x7E)
// - send frame
// send_cancel: should we first send a EZSP_CANCEL (0x1A) before the message to clear any leftover
void ZigbeeEZSPSendRaw(const uint8_t *msg, size_t len, bool send_cancel) {
if ((len < 1) || (len > 252)) {
// abort, message cannot be less than 2 bytes for CMD1 and CMD2
AddLog_P2(LOG_LEVEL_DEBUG, PSTR(D_JSON_ZIGBEE_EZSP_SENT ": bad message len %d"), len);
return;
}
uint8_t data_len = len - 2; // removing CMD1 and CMD2
if (ZigbeeSerial) {
if (send_cancel) {
ZigbeeSerial->write(ZIGBEE_EZSP_CANCEL); // 0x1A
}
bool data_frame = (0 == (msg[0] & 0x80));
uint8_t rand = 0x42; // pseudo-randomizer initial value
uint16_t crc = 0xFFFF; // CRC16 CCITT initialization
for (uint32_t i=0; i<len; i++) {
uint8_t out_byte = msg[i];
// apply randomization if DATA field
if (data_frame && (i > 0)) {
out_byte ^= rand;
if (rand & 1) { rand = (rand >> 1) ^ 0xB8; }
else { rand = (rand >> 1); }
}
// compute CRC
crc = crc ^ ((uint16_t)out_byte << 8);
for (uint32_t i=0; i<8; i++) {
if (crc & 0x8000) {
crc = (crc << 1) ^ 0x1021; // polynom is x^16 + x^12 + x^5 + 1, CCITT standard
} else {
crc <<= 1;
}
}
// output byte
ZigbeeEZSPSend_Out(out_byte);
}
// send CRC16 in big-endian
ZigbeeEZSPSend_Out(crc >> 8);
ZigbeeEZSPSend_Out(crc & 0xFF);
// finally send End of Frame
ZigbeeSerial->write(ZIGBEE_EZSP_EOF); // 0x1A
}
// Now send a MQTT message to report the sent message
char hex_char[(len * 2) + 2];
AddLog_P2(LOG_LEVEL_DEBUG, PSTR(D_LOG_ZIGBEE D_JSON_ZIGBEE_EZSP_SENT_RAW " %s"),
ToHex_P(msg, len, hex_char, sizeof(hex_char)));
}
// Send an EZSP command and data
// Ex: Version with min v8 = 000008
void ZigbeeEZSPSendCmd(const uint8_t *msg, size_t len, bool send_cancel) {
char hex_char[len*2 + 2];
ToHex_P(msg, len, hex_char, sizeof(hex_char));
AddLog_P2(LOG_LEVEL_INFO, PSTR(D_LOG_ZIGBEE "ZbEZSPSend %s"), hex_char);
SBuffer cmd(len+3); // prefix with seq number (1 byte) and frame control bytes (2 bytes)
cmd.add8(EZSP_Serial.ezsp_seq++);
cmd.add8(0x00); // Low byte of Frame Control
cmd.add8(0x01); // High byte of Frame Control, frameFormatVersion = 1
cmd.addBuffer(msg, len);
// send
ZigbeeEZSPSendDATA(cmd.getBuffer(), cmd.len(), send_cancel);
}
// Send an EZSP DATA frame, automatically calculating the correct frame numbers
void ZigbeeEZSPSendDATA(const uint8_t *msg, size_t len, bool send_cancel) {
uint8_t control_byte = ((EZSP_Serial.to_ack & 0x07) << 4) + (EZSP_Serial.from_ack & 0x07);
// increment to_ack
EZSP_Serial.to_ack = (EZSP_Serial.to_ack + 1) & 0x07;
// build complete frame
SBuffer buf(len+1);
buf.add8(control_byte);
buf.addBuffer(msg, len);
// send
ZigbeeEZSPSendRaw(buf.getBuffer(), buf.len(), send_cancel);
}
// Receive a high-level EZSP command/response, starting with 16-bits frame ID
int32_t ZigbeeProcessInputEZSP(class SBuffer &buf) {
// verify errors in first 2 bytes.
// TODO
// uint8_t sequence_num = buf.get8(0);
uint16_t frame_control = buf.get16(1);
bool truncated = frame_control & 0x02;
bool overflow = frame_control & 0x01;
bool callbackPending = frame_control & 0x04;
bool security_enabled = frame_control & 0x8000;
Zigbee EZSP milestone 3
2020-06-29 21:21:32 +01:00
if (truncated || overflow || security_enabled) {
EZSP milestone 2
2020-06-19 19:54:37 +01:00
AddLog_P2(LOG_LEVEL_INFO, PSTR("ZIG: specific frame_control 0x%04X"), frame_control);
}
// remove first 2 bytes, be
for (uint32_t i=0; i<buf.len()-3; i++) {
buf.set8(i, buf.get8(i+3));
}
buf.setLen(buf.len() - 3);
char hex_char[buf.len()*2 + 2];
// log message
ToHex_P((unsigned char*)buf.getBuffer(), buf.len(), hex_char, sizeof(hex_char));
Response_P(PSTR("{\"" D_JSON_ZIGBEE_EZSP_RECEIVED "\":\"%s\"}"), hex_char);
if (Settings.flag3.tuya_serial_mqtt_publish) {
MqttPublishPrefixTopic_P(TELE, PSTR(D_RSLT_SENSOR));
XdrvRulesProcess();
} else {
AddLog_P2(LOG_LEVEL_INFO, PSTR(D_LOG_ZIGBEE "%s"), mqtt_data); // TODO move to LOG_LEVEL_DEBUG when stable
}
// Pass message to state machine
ZigbeeProcessInput(buf);
}
// Receive raw ASH frame (CRC was removed, data unstuffed) but still contains frame numbers
int32_t ZigbeeProcessInputRaw(class SBuffer &buf) {
uint8_t control_byte = buf.get8(0);
uint8_t ack_num = control_byte & 0x07; // keep 3 LSB
if (control_byte & 0x80) {
// non DATA frame
uint8_t frame_type = control_byte & 0xE0; // keep 3 MSB
if (frame_type == 0x80) {
// ACK
EZSP_Serial.from_ack = ack_num; // update ack num
} else if (frame_type == 0xA0) {
// NAK
AddLog_P2(LOG_LEVEL_INFO, PSTR("ZIG: Received NAK %d, resending not implemented"), ack_num);
} else if (control_byte == 0xC1) {
// RSTACK
// received just after boot, either because of Power up, hardware reset or RST
Z_EZSP_RSTACK(buf.get8(2));
EZSP_Serial.from_ack = 0;
EZSP_Serial.to_ack = 0;
// pass it to state machine with a special 0xFFFE frame code (EZSP_RSTACK_ID)
buf.set8(0, Z_B0(EZSP_rstAck));
buf.set8(1, Z_B1(EZSP_rstAck));
// keep byte #2 with code
buf.setLen(3);
ZigbeeProcessInput(buf);
} else if (control_byte == 0xC2) {
// ERROR
Z_EZSP_ERROR(buf.get8(2));
zigbee.active = false; // stop all zigbee activities
} else {
// Unknown
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("ZIG: Received unknown control byte 0x%02X"), control_byte);
}
} else {
// DATA Frame
// check the frame number, and send ACK or NAK
if ((control_byte & 0x07) != EZSP_Serial.to_ack) {
AddLog_P2(LOG_LEVEL_INFO, PSTR("ZIG: wrong ack, received %d, expected %d"), control_byte & 0x07, EZSP_Serial.to_ack);
//EZSP_Serial.to_ack = control_byte & 0x07;
}
// MCU acknowledged the correct frame
// we acknowledge the frame too
EZSP_Serial.from_ack = ((control_byte >> 4) + 1) & 0x07;
uint8_t ack_byte = 0x80 | EZSP_Serial.from_ack;
ZigbeeEZSPSendRaw(&ack_byte, 1, false); // send a 1-byte ACK
// build the EZSP frame
// remove first byte
for (uint8_t i=0; i<buf.len()-1; i++) {
buf.set8(i, buf.get8(i+1));
}
buf.setLen(buf.len()-1);
// pass to next level
ZigbeeProcessInputEZSP(buf);
}
}
//
// Same code for `ZbEZSPSend` and `ZbEZSPReceive`
// building the complete message (intro, length)
//
// ZbEZSPSend1 = high level EZSP command
// ZbEZSPSend2 = low level EZSP DATA frame (with sequence numbers)
// ZbEZSPSend3 = low level ASH frame
//
void CmndZbEZSPSendOrReceive(bool send)
{
if (ZigbeeSerial && (XdrvMailbox.data_len > 0)) {
uint8_t code;
char *codes = RemoveSpace(XdrvMailbox.data);
int32_t size = strlen(XdrvMailbox.data);
SBuffer buf((size+1)/2);
while (size > 1) {
char stemp[3];
strlcpy(stemp, codes, sizeof(stemp));
code = strtol(stemp, nullptr, 16);
buf.add8(code);
size -= 2;
codes += 2;
}
if (send) {
// Command was `ZbEZSPSend`
if (2 == XdrvMailbox.index) { ZigbeeEZSPSendDATA(buf.getBuffer(), buf.len(), true); }
else if (3 == XdrvMailbox.index) { ZigbeeEZSPSendRaw(buf.getBuffer(), buf.len(), true); }
else { ZigbeeEZSPSendCmd(buf.getBuffer(), buf.len(), true); }
} else {
// Command was `ZbEZSPReceive`
if (2 == XdrvMailbox.index) { ZigbeeProcessInput(buf); }
else if (3 == XdrvMailbox.index) { ZigbeeProcessInputRaw(buf); }
else { ZigbeeProcessInputEZSP(buf); } // TODO
}
}
ResponseCmndDone();
}
// Variants with managed ASH frame numbers
// For debug purposes only, simulates a message received
void CmndZbEZSPReceive(void)
{
CmndZbEZSPSendOrReceive(false);
}
void CmndZbEZSPSend(void)
{
CmndZbEZSPSendOrReceive(true);
}
#endif // USE_ZIGBEE_EZSP
//
// Internal function, send the low-level frame
// Input:
// - shortaddr: 16-bits short address, or 0x0000 if group address
// - groupaddr: 16-bits group address, or 0x0000 if unicast using shortaddr
// - clusterIf: 16-bits cluster number
// - endpoint: 8-bits target endpoint (source is always 0x01), unused for group addresses. Should not be 0x00 except when sending to group address.
// - cmdId: 8-bits ZCL command number
// - clusterSpecific: boolean, is the message general cluster or cluster specific, used to create the FC byte of ZCL
// - msg: pointer to byte array, payload of ZCL message (len is following), ignored if nullptr
// - len: length of the 'msg' payload
// - needResponse: boolean, true = we ask the target to respond, false = the target should not respond
// - transacId: 8-bits, transation id of message (should be incremented at each message), used both for Zigbee message number and ZCL message number
// Returns: None
//
void ZigbeeZCLSend_Raw(uint16_t shortaddr, uint16_t groupaddr, uint16_t clusterId, uint8_t endpoint, uint8_t cmdId, bool clusterSpecific, uint16_t manuf, const uint8_t *msg, size_t len, bool needResponse, uint8_t transacId) {
#ifdef USE_ZIGBEE_ZNP
SBuffer buf(32+len);
buf.add8(Z_SREQ | Z_AF); // 24
buf.add8(AF_DATA_REQUEST_EXT); // 02
if (BAD_SHORTADDR == shortaddr) { // if no shortaddr we assume group address
buf.add8(Z_Addr_Group); // 01
buf.add64(groupaddr); // group address, only 2 LSB, upper 6 MSB are discarded
buf.add8(0xFF); // dest endpoint is not used for group addresses
} else {
buf.add8(Z_Addr_ShortAddress); // 02
buf.add64(shortaddr); // dest address, only 2 LSB, upper 6 MSB are discarded
buf.add8(endpoint); // dest endpoint
}
buf.add16(0x0000); // dest Pan ID, 0x0000 = intra-pan
buf.add8(0x01); // source endpoint
buf.add16(clusterId);
buf.add8(transacId); // transacId
buf.add8(0x30); // 30 options
buf.add8(0x1E); // 1E radius
buf.add16(3 + len + (manuf ? 2 : 0));
buf.add8((needResponse ? 0x00 : 0x10) | (clusterSpecific ? 0x01 : 0x00) | (manuf ? 0x04 : 0x00)); // Frame Control Field
if (manuf) {
buf.add16(manuf); // add Manuf Id if not null
}
buf.add8(transacId); // Transaction Sequance Number
buf.add8(cmdId);
if (len > 0) {
buf.addBuffer(msg, len); // add the payload
}
ZigbeeZNPSend(buf.getBuffer(), buf.len());
#endif // USE_ZIGBEE_ZNP
}
#endif // USE_ZIGBEE