//controlleer de CRC
//cursor is op 0 gezet
//process eerst de header
//dan de payload, als die er is
//dan de ontvangen en berekende CRC met elkaar vegelijk
//zijn ze hetzelfde, dan state = PROCESS_PAYLOAD
//anders error
void GPSTP::_processCRC() {
//crc of header part
if (_cursor < HEADER_LENGHT) {
_crcCalculaded = _crc16_update(_crcCalculaded, _header[_cursor]);
//_serial->println("CRC Header proccesing");
}
//crc of payload part
else if (_cursor < HEADER_LENGHT + _payloadLen) {
_crcCalculaded = _crc16_update(_crcCalculaded, _payload[_cursor - HEADER_LENGHT]);
}
//check CRC
else {
if (_crcCalculaded == _crcRecieved) {
_state = PROCESS_PAYLOAD;
}
else {
_errorHandler(CRC_ERROR);
}
}
//de volgende locatie, voor de volgende run
_cursor++;
}
int modbus()
{
if(data[0]!=slave_id) return 2;
uint16_t modbus_crc=0xFFFF;
for(i=0; i<(rx_len-2); i++)
{
modbus_crc=_crc16_update(modbus_crc, data[i]);
}
uint8_t modbus_crc_l=modbus_crc>>8;
uint8_t modbus_crc_h=modbus_crc;
if((modbus_crc_h!=data[rx_len-2]) | (modbus_crc_l!=data[rx_len-1])) return 2; // Error CRC.
function=data[1];
switch(function)
{
case COMMAND_HOLDING_REG: return(read_holding_reg()); break;
case COMMAND_INPUT_REG: return(read_input_reg()); break;
case COMMAND_WRITE_REG: return(write_reg()); break;
}
//Ilegal Function///
char data_err[5]={slave_id, 0x83, 0x01, 0xFF, 0xFF};
modbus_crc=0xFFFF;
for(i=0; i<(sizeof(data_err)-2); i++)
{
modbus_crc=_crc16_update(modbus_crc, data_err[i]);
}
data_err[(sizeof(data_err)-2)]=modbus_crc;
data_err[(sizeof(data_err)-1)]=modbus_crc>>8;
for(i=0; i<sizeof(data_err); i++)
{
usart0_write(data_err[i]);
}
return 1;
}
/// @details
/// Handles a RFM12 interrupt depending on rxstate and the status reported by the RF
/// module.
static void rf12_interrupt() {
uint8_t in;
state = rf12_xferState(&in);
// data received or byte needed for sending
if (state & RF_FIFO_BIT) {
if (rxstate == TXRECV) { // we are receiving
if (rxfill == 0 && group != 0)
rf12_buf[rxfill++] = group;
rf12_buf[rxfill++] = in;
rf12_crc = _crc16_update(rf12_crc, in);
// do drssi binary-tree search
if ( drssi < 3 && ((rxfill-2)%drssi_bytes_per_decision)==0 ) {// not yet final value
// top nibble when going up, bottom one when going down
drssi = bitRead(state,8)
? (drssi_dec_tree[drssi] & B1111)
: (drssi_dec_tree[drssi] >> 4);
if ( drssi < 3 ) { // not yet final destination, set new threshold
rf12_xfer(RF_RECV_CONTROL | drssi*2+1);
}
}
// check if we got all the bytes (or maximum packet length was reached)
if (fixedLength) {
if (rxfill >= fixedLength || rxfill >= RF_MAX) {
rf12_idle();
}
} else if (rxfill >= rf12_len + 5 || rxfill >= RF_MAX) {
rf12_idle();
}
} else { // we are sending
static bool check_crc(void) {
uint8_t *eeprom_addr = (uint8_t *)EEPROM_ADDR;
uint16_t crc = ~0;
for (uint16_t i=0; i<config_sz; i++)
crc = _crc16_update(crc, eeprom_read_byte(eeprom_addr + i));
return crc == 0;
}
static void write_crc(void) {
uint8_t *eeprom_addr = (uint8_t *)EEPROM_ADDR;
uint16_t crc = ~0;
for (uint16_t i=0; i<config_sz-2; i++)
crc = _crc16_update(crc, eeprom_read_byte(eeprom_addr + i));
eeprom_write_word((uint16_t*)(eeprom_addr+config_sz-2), crc);
}
uint8_t Rfm12b::Send (uint8_t* Data, uint8_t Length) {
uint8_t i;
RFM12_INT_OFF();
if ((InputLength > 0) ||
(Rfm12bSpi.GetWord (RFM12B_STATUS_CMD) & RFM12B_STATUS_RSSI_PIN) != 0) {
// either already receiving something or RFM12B detects a
// signal, so don't send now
RFM12_INT_ON();
return 0;
}
Rfm12bSpi.SendWord (RF_IDLE_MODE); // switch off receiver
OutputData[LENGTH_BYTE] = Length + 2; // include 2 crc bytes in length
memcpy ((void*) &OutputData[LENGTH_BYTE+1], Data, Length);
OutputLength = Length + LENGTH_BYTE + 1; // include 4 preamble bytes + 1 Length byte
// calculate crc and put it into output buffer
Crc = ~0;
for (i=0; i <= Length; i++)
Crc = _crc16_update(Crc, OutputData[i+4]);
OutputData[OutputLength++] = Crc & 0xFF;
OutputData[OutputLength++] = Crc >> 8;
// add trailer byte to end of packet to ensure last byte of data is transmitted completely
OutputData[OutputLength] = PREAMBLE;
// pre-load preamble byte into transmit buffer to get things going quickly
Rfm12bSpi.SendWord (RFM12B_TX_CMD + PREAMBLE);
// turn on transmitter
Rfm12bSpi.SendWord (RF_XMITTER_ON); // bytes will be fed via interrupts
RFM12_INT_ON();
return Length;
}
/** block-at-once CRC16 calculator
\param *data data to find crc16 for
\param len length of data
\return uint16 crc16 of passed data
uses avr-libc's optimised crc16 routine
*/
uint16_t crc_block(void *data, uint16_t len) {
uint16_t crc = 0;
for (; len; data++, len--) {
crc = _crc16_update(crc, *((uint8_t *) data));
}
return crc;
}
/// @details
/// This calls rf12_initialize() with settings obtained from EEPROM address
/// 0x20 .. 0x3F. These settings can be filled in by the RF12demo sketch in the
/// RFM12B library. If the checksum included in those bytes is not valid,
/// rf12_initialize() will not be called.
///
/// As side effect, rf12_config() also writes the current configuration to the
/// serial port, ending with a newline.
/// @returns the node ID obtained from EEPROM, or 0 if there was none.
uint8_t rf12_config (uint8_t show) {
uint16_t crc = ~0;
for (uint8_t i = 0; i < RF12_EEPROM_SIZE; ++i)
crc = _crc16_update(crc, eeprom_read_byte(RF12_EEPROM_ADDR + i));
if (crc != 0)
return 0;
uint8_t nodeId = 0, group = 0;
for (uint8_t i = 0; i < RF12_EEPROM_SIZE - 2; ++i) {
uint8_t b = eeprom_read_byte(RF12_EEPROM_ADDR + i);
if (i == 0)
nodeId = b;
else if (i == 1)
group = b;
else if (b == 0)
break;
else if (show)
Serial.print((char) b);
}
if (show)
Serial.println();
rf12_initialize(nodeId, nodeId >> 6, group);
return nodeId & RF12_HDR_MASK;
}
void CONFIG_SaveTemporalConfig()
{
uint16_t eeprom_size = sizeof(CONFIG_HEADER_t) + sizeof(NETWORK_CONFIG_t);
uint16_t acc = 0;
runningConfiguration.topConfiguration.configHeader.checkSum = 0;
runningConfiguration.topConfiguration.configHeader.firmVersion = 0xFF;
runningConfiguration.topConfiguration.configHeader.length = eeprom_size;
runningConfiguration.topConfiguration.configHeader.systemFlags.raw = 0;
if(VALID_DATETIME)
{
runningConfiguration.topConfiguration.configHeader.updateDate = currentDate;
runningConfiguration.topConfiguration.configHeader.updateTime = currentTime;
runningConfiguration.topConfiguration.configHeader.updateWeekDay = currentWeek;
}
//Compute checksum
for(int i = 0; i < eeprom_size; i++)
acc = _crc16_update(acc, runningConfiguration.raw[i]);
runningConfiguration.topConfiguration.configHeader.checkSum = acc;
EEPROM_Write_Block(&runningConfiguration, 0x00, eeprom_size);
}
static void rf12_interrupt () {
// a transfer of 2x 16 bits @ 2 MHz over SPI takes 2x 8 us inside this ISR
// correction: now takes 2 + 8 µs, since sending can be done at 8 MHz
rf12_xfer(0x0000);
if (rxstate == TXRECV) {
uint8_t in = rf12_xferSlow(RF_RX_FIFO_READ);
if (rxfill == 0 && group != 0)
rf12_buf[rxfill++] = group;
rf12_buf[rxfill++] = in;
rf12_crc = _crc16_update(rf12_crc, in);
if (rxfill >= rf12_len + 5 || rxfill >= RF_MAX)
rf12_xfer(RF_IDLE_MODE);
} else {
uint8_t out;
if (rxstate < 0) {
uint8_t pos = 3 + rf12_len + rxstate++;
out = rf12_buf[pos];
rf12_crc = _crc16_update(rf12_crc, out);
} else
switch (rxstate++) {
case TXSYN1:
out = 0x2D;
break;
case TXSYN2:
out = group;
rxstate = - (2 + rf12_len);
break;
case TXCRC1:
out = rf12_crc;
break;
case TXCRC2:
out = rf12_crc >> 8;
break;
case TXDONE:
rf12_xfer(RF_IDLE_MODE); // fall through
default:
out = 0xAA;
}
rf12_xfer(RF_TXREG_WRITE + out);
}
}
uint16_t EnduranceEeprom::memCrc16(uint16_t addr, size_t len)
{
uint16_t crc = 0xFFFF;
for (uint16_t i=0; i<len; i++) {
crc = _crc16_update(crc, m_eeprom.read_byte(addr++));
}
return crc;
}
void sserial_sendbyte(byte bt)
{
uart_send(sserial_portindex,bt);sserial_crc16=_crc16_update(sserial_crc16,bt);
if (bt==0x98)
{
uart_send(sserial_portindex,0);
}
}
static uint16_t calcCRCrom (const void* ptr, uint16_t len) {
// init 0xFFFF
uint16_t crc = ~0;
for (uint16_t i = 0; i < len; i++) {
crc = _crc16_update(crc, pgm_read_byte((uint16_t) ptr + i));
}
return crc;
}
static void rf12_interrupt() {
// a transfer of 2x 16 bits @ 2 MHz over SPI takes 2x 8 us inside this ISR
rf12_xfer(0x0000);
if (rxstate == TXRECV) {
uint8_t in = rf12_xfer(RF_RX_FIFO_READ);
//if (rxfill == 0 && group != 0)
// rf12_buf[rxfill++] = group;
rf12_buf[rxfill++] = in;
rf12_crc = _crc16_update(rf12_crc, in);
if (rxfill >= rf12_len + 2 || rxfill >= RF_MAX) {
rf12_xfer(RF_IDLE_MODE); // receiver abschalten
rxstate = TXIDLE;
if (rf12_len > RF12_MAXDATA)
rf12_crc = 1; // force bad crc if packet length is invalid
if(receive_callback != NULL) {
(*receive_callback)();
}
}
} else {
uint8_t out;
if (rxstate < 0) {
uint8_t pos = rf12_len + rxstate++;
out = rf12_buf[pos];
rf12_crc = _crc16_update(rf12_crc, out);
} else
switch (rxstate++) {
case TXSYN1: out = 0x2D; break;
case TXSYN2: out = 0xD4; rxstate = - (rf12_len); break;
case TXCRC1: out = rf12_crc; break;
case TXCRC2: out = rf12_crc >> 8; break;
case TXDONE: rf12_xfer(RF_IDLE_MODE);
//Serial.println(micros(), DEC);// fall through
default: out = 0xAA;
}
rf12_xfer(RF_TXREG_WRITE + out);
}
}
uint16_t checkcrc(unsigned char *data, unsigned char len) {
uint16_t crc = 0x00;
for (int16_t i = 0; i<len; i++) {
crc = _crc16_update(crc, buffer[i]);
}
return crc;
}
uint16_t
modbus_crc_calc(uint8_t *data, uint8_t len)
{
uint16_t crc = 0xffff;
uint8_t i = 0;
while(i < len)
crc = _crc16_update(crc, data[i++]);
return crc;
}
void MultidropMaster::sendByte(uint8_t b, uint8_t directionCntrl, uint8_t updateCRC) {
if (directionCntrl) serial->enable_write();
serial->write(b);
if (directionCntrl) serial->enable_read();
if (updateCRC) {
messageCRC = _crc16_update(messageCRC, b);
}
}
void send_msg(uint8_t dirs, char *data, uint8_t dataLength, uint8_t hpFlag){
if(dataLength>IR_BUFFER_SIZE) printf_P(PSTR("ERROR: Message exceeds IR_BUFFER_SIZE.\r\n"));
uint16_t crc = getDropletID();
for(uint8_t dir=0; dir<6; dir++){
if(dirs&(1<<dir)){
uint8_t lengthAndStatusByte = dataLength;
lengthAndStatusByte |= (ir_rxtx[dir].status & IR_STATUS_COMMAND_bm);
lengthAndStatusByte |= (ir_rxtx[dir].status & IR_STATUS_TIMED_bm);
crc = _crc16_update(crc, lengthAndStatusByte);
if(!(ir_rxtx[dir].status&IR_STATUS_TIMED_bm)){
crc = _crc16_update(crc, ir_rxtx[dir].targetID);
}
break;
}
}
for(uint8_t i=0; i<dataLength; i++) crc = _crc16_update(crc, data[i]); //Calculate CRC of outbound message.
for(uint8_t dir=0; dir<6; dir++){
if(dirs&(1<<dir)){
ir_rxtx[dir].status |= IR_STATUS_TRANSMITTING_bm;
ir_rxtx[dir].data_length = dataLength;
ir_rxtx[dir].data_crc = crc;
ir_rxtx[dir].curr_pos = 0;
ir_rxtx[dir].senderID = getDropletID();
memcpy((char*)ir_rxtx[dir].buf, data, dataLength);
TCF2.CTRLB |= ir_carrier_bm[dir]; // Turn on carrier wave on port dir
}
}
for(uint8_t dir=0; dir<6; dir++){
if(dirs&(1<<dir)){
ir_rxtx[dir].last_byte = 0;
if(hpFlag){
channel[dir]->CTRLA |= USART_DREINTLVL_HI_gc;
}else{
channel[dir]->CTRLA |= USART_DREINTLVL_MED_gc;
}
}
}
/* The whole transmission will now occur in interrupts. */
}
static void rf12_recvStart () {
rxfill = rf12_len = 0;
rf12_crc = ~0;
#if RF12_VERSION >= 2
if (group != 0)
rf12_crc = _crc16_update(~0, group);
#endif
rxstate = TXRECV;
rf12_xfer(RF_RECEIVER_ON);
}
int16_t
parse_cmd_crc_calc(char *cmd, char *output, uint16_t len)
{
uint8_t *p;
uint16_t crc = 0xffff;
for (p = 0; p < (uint8_t *) CRC_BYTE_POS; p++)
crc = _crc16_update(crc, pgm_read_byte(p));
return ECMD_FINAL(sprintf_P(output, PSTR("%.4X"), crc));
}
static uint16_t crc16_block_update(uint16_t crc, const void *_data, uint16_t size)
{
const uint8_t *data = _data;
while (size) {
crc = _crc16_update(crc, *data);
data++;
size--;
}
return crc;
}
void send_message(const void *message, size_t len) {
uint8_t *ptr = (uint8_t *)message;
uint16_t crc16 = 0;
int i;
for(i=0; i < len; i++) {
TX_USART_vSendByte(*ptr);
crc16 = _crc16_update(crc16, *ptr);
ptr++;
}
// pad with zeros
for(i=len; i < MESSAGE_LENGTH; i++) {
TX_USART_vSendByte(0);
crc16 = _crc16_update(crc16, 0);
}
// send crc16 low byte first
TX_USART_vSendByte((uint8_t)crc16);
crc16 = crc16 >> 8;
TX_USART_vSendByte((uint8_t)crc16);
}
static uint16_t calculate_crc(const configuration_type* configuration) {
uint16_t calculated_crc = 0;
uint8_t i = 0;
uint8_t length = sizeof(configuration_type) - 2;
while (i < length) {
_crc16_update(calculated_crc, *((uint8_t*)configuration + i));
i++;
}
return calculated_crc;
}
void rf12_sendStart (uint8_t hdr) {
rf12_hdr = hdr & RF12_HDR_DST ? hdr :
(hdr & ~RF12_HDR_MASK) + (nodeid & NODE_ID);
if (crypter != 0)
crypter(1);
rf12_crc = ~0;
#if RF12_VERSION >= 2
rf12_crc = _crc16_update(rf12_crc, group);
#endif
rxstate = TXPRE1;
rf12_xfer(RF_XMITTER_ON); // bytes will be fed via interrupts
}
void send_packet(const struct data_packet *message) {
uint8_t *ptr = (uint8_t *)message;
uint16_t crc16 = 0;
int i;
for(i=0; i < MESSAGE_LENGTH; i++) {
TX_USART_vSendByte(*ptr);
crc16 = _crc16_update(crc16, *ptr);
ptr++;
}
// send crc16 low byte first
TX_USART_vSendByte((uint8_t)crc16);
crc16 = crc16 >> 8;
TX_USART_vSendByte((uint8_t)crc16);
}
uint8_t MultidropMaster::checkForResponses(uint32_t time) {
uint8_t b, i;
if (dontTimeout) {
timeoutTime = time + timeoutDuration;
}
dontTimeout = false;
// Received all responses
if (waitingOnNodes == 0) {
finishMessage();
return true;
}
// Get more responses
while (serial->available()) {
b = serial->read();
responseBuff[responseIndex] = b;
messageCRC = _crc16_update(messageCRC, b);
responseIndex++;
dontTimeout = true;
// Have we received all the data for this node?
if (responseIndex % dataLength == 0) {
waitingOnNodes--;
}
}
// Node timeout, send default response
if (time > timeoutTime) {
// It's possible the node sent a partial response, so send whatever is left
for (i = responseIndex % dataLength; i < dataLength; i++) {
sendByte(defaultResponseValues[i], true);
responseBuff[responseIndex] = defaultResponseValues[i];
responseIndex++;
}
dontTimeout = true;
waitingOnNodes--;
}
if (waitingOnNodes == 0) {
finishMessage();
return true;
}
return false;
}
static void rf12_recvStart () {
if (rf12_fixed_pkt_len) {
rf12_len = rf12_fixed_pkt_len;
rf12_grp = rf12_hdr = 0;
rxfill = 3;
} else
rxfill = rf12_len = 0;
rf12_crc = ~0;
#if RF12_VERSION >= 2
if (group != 0)
rf12_crc = _crc16_update(~0, group);
#endif
rxstate = TXRECV;
rf12_xfer(RF_RECEIVER_ON);
}
void error_data_value()
{
char data_err[5]={slave_id, 0x83, 0x03, 0xFF, 0xFF};
uint16_t modbus_crc=0xFFFF;
for(i=0; i<(sizeof(data_err)-2); i++)
{
modbus_crc=_crc16_update(modbus_crc, data_err[i]);
}
data_err[(sizeof(data_err)-2)]=modbus_crc;
data_err[(sizeof(data_err)-1)]=modbus_crc>>8;
for(i=0; i<sizeof(data_err); i++)
{
usart0_write(data_err[i]);
}
}
/// @details
/// This calls rf12_initialize() with settings obtained from EEPROM address
/// 0x20 .. 0x3F. These settings can be filled in by the RF12demo sketch in the
/// RFM12B library. If the checksum included in those bytes is not valid,
/// rf12_initialize() will not be called.
///
/// As side effect, rf12_config() also writes the current configuration to the
/// serial port, ending with a newline. Use rf12_configSilent() to avoid this.
/// @returns the node ID obtained from EEPROM, or 0 if there was none.
uint8_t rf12_configSilent () {
uint16_t crc = ~0;
for (uint8_t i = 0; i < RF12_EEPROM_SIZE; ++i) {
byte e = eeprom_read_byte(RF12_EEPROM_ADDR + i);
crc = _crc16_update(crc, e);
}
if (crc || eeprom_read_byte(RF12_EEPROM_ADDR + 2) != RF12_EEPROM_VERSION)
return 0;
uint8_t nodeId = 0, group = 0;
uint16_t frequency = 0;
nodeId = eeprom_read_byte(RF12_EEPROM_ADDR + 0);
group = eeprom_read_byte(RF12_EEPROM_ADDR + 1);
frequency = eeprom_read_word((uint16_t*) (RF12_EEPROM_ADDR + 4));
rf12_initialize(nodeId, nodeId >> 6, group, frequency);
return nodeId & RF12_HDR_MASK;
}
bool RF12Module::SaveConfig() {
// Variables used by the macros...
byte pos, len;
int remainder;
memset(msg, 0, sizeof msg);
strcpy(msg, " ");
byte id = nodeId & 0x1F;
strcat(msg, " i");
ADD_INT(msg, id);
if (nodeId & COLLECT)
ADD_CHAR(msg, '*');
strcat(msg, " g");
ADD_INT(msg, group);
strcat(msg, " @ ");
static word bands[4] = { 315, 433, 868, 915 };
word band = nodeId >> 6;
ADD_INT(msg, bands[band]);
strcat(msg, " MHz ");
crc = ~0;
for (byte i = 0; i < sizeof(*this) - 2; ++i)
crc = _crc16_update(crc, ((byte*) this)[i]);
// save to EEPROM
for (byte i = 0; i < sizeof(*this); ++i) {
byte b = ((byte*) this)[i];
eeprom_write_byte(RF12_EEPROM_ADDR + i, b);
}
if (!rf12_config()) {
Serial.print(RF12_EEPROM_SIZE);
Serial.print( " vs ");
Serial.println(sizeof(*this));
return false;
}
return true;
}
