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XN297EMU: allows to send and receive 0 payload length in enhanced mode

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This commit is contained in:
Pascal Langer 2021-08-25 19:07:36 +02:00
parent 4f1e5d2452
commit 9356e7654e
2 changed files with 58 additions and 24 deletions
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35
Multiprotocol/XN297Dump_nrf24l01.ino
View File

@ -258,6 +258,26 @@ static uint16_t XN297Dump_callback()
debug(" %02X",packet[i]);
}
debugln("");
/*******/
packet_sent++;
//if(packet_sent==0)
{
delayMicroseconds(3000);
debug("TX");
memcpy(packet,(uint8_t *)"\x11\x1A\x35\x43\x01\x00\x00\x00\x00\x1A",10);
//memcpy(packet,(uint8_t *)"\x10\x00\x35\x43\x01\x00\x00\x00\x00\x1A",10);
XN297_Configure(XN297_CRCEN, XN297_SCRAMBLED, XN297_1M);
XN297_SetTXAddr((uint8_t *)"\x56\x06\x23\x00\x13", 5); // Bind address
XN297_SetTxRxMode(TXRX_OFF);
XN297_SetTxRxMode(TX_EN);
XN297_WriteEnhancedPayload(packet, 0, 0);
delayMicroseconds(1000);
XN297_WriteEnhancedPayload(packet, 10, 0);
delayMicroseconds(1000);
NRF24L01_WriteReg(NRF24L01_03_SETUP_AW, 0x01); // 3 bytes RX/TX address
NRF24L01_WriteRegisterMulti(NRF24L01_0A_RX_ADDR_P0, (uint8_t*)"\x55\x0F\x71", 3); // set up RX address to xn297 preamble
}
/*******/
}
else
{
@ -431,9 +451,12 @@ static uint16_t XN297Dump_callback()
{ // RX fifo data ready
// if(NRF24L01_ReadReg(NRF24L01_09_CD))
{
boolean res;
uint8_t res;
if(enhanced)
{
res=XN297_ReadEnhancedPayload(packet, packet_length);
res++;
}
else
res=XN297_ReadPayload(packet, packet_length);
if(res)
@ -526,9 +549,12 @@ static uint16_t XN297Dump_callback()
{ // RX fifo data ready
//if(NRF24L01_ReadReg(NRF24L01_09_CD))
{
boolean res;
uint8_t res;
if(enhanced)
{
res=XN297_ReadEnhancedPayload(packet, packet_length);
res++;
}
else
res=XN297_ReadPayload(packet, packet_length);
if(res)
@ -572,9 +598,12 @@ static uint16_t XN297Dump_callback()
{ // RX fifo data ready
//if(NRF24L01_ReadReg(NRF24L01_09_CD))
{
boolean res;
uint8_t res;
if(enhanced)
{
res=XN297_ReadEnhancedPayload(packet, packet_length);
res++;
}
else
res=XN297_ReadPayload(packet, packet_length);
if(res)

21
Multiprotocol/XN297_EMU.ino
View File

@ -292,7 +292,7 @@ static void __attribute__((unused)) XN297_WriteEnhancedPayload(uint8_t* msg, uin
uint8_t last = 0;
static uint8_t pid=0;
if (xn297_rf == XN297_NRF && xn297_addr_len < 4 && xn297_rf == XN297_NRF)
if (xn297_rf == XN297_NRF && xn297_addr_len < 4)
{ // If address length (which is defined by receiver address length) is less than 4 the TX address can't fit the preamble, so the last byte goes here
buf[last++] = 0x55;
}
@ -314,6 +314,8 @@ static void __attribute__((unused)) XN297_WriteEnhancedPayload(uint8_t* msg, uin
buf[last] = (pid << 7) | (noack << 6);
// payload
if(len)
{
buf[last]|= bit_reverse(msg[0]) >> 2; // first 6 bit of payload
if(xn297_scramble_enabled)
buf[last] ^= xn297_scramble[scramble_index++];
@ -330,6 +332,7 @@ static void __attribute__((unused)) XN297_WriteEnhancedPayload(uint8_t* msg, uin
buf[last] = bit_reverse(msg[len-1]) << 6; // last 2 bit of payload
if(xn297_scramble_enabled)
buf[last] ^= xn297_scramble[scramble_index++] & 0xc0;
}
// crc
if (xn297_crc)
@ -444,7 +447,9 @@ static uint8_t __attribute__((unused)) XN297_ReadEnhancedPayload(uint8_t* msg, u
if(xn297_scramble_enabled)
pcf_size ^= xn297_scramble[xn297_addr_len];
pcf_size = pcf_size >> 1;
for(int i=0; i<len; i++)
if(pcf_size>32)
return 255; // Error
for(int i=0; i< pcf_size; i++)
{
msg[i] = bit_reverse((buffer[i+1] << 2) | (buffer[i+2] >> 6));
if(xn297_scramble_enabled)
@ -461,20 +466,20 @@ static uint8_t __attribute__((unused)) XN297_ReadEnhancedPayload(uint8_t* msg, u
for (uint8_t i = 0; i < xn297_addr_len; ++i)
crc16_update( xn297_rx_addr[xn297_addr_len-i-1], 8);
//process payload
for (uint8_t i = 0; i < len+1; ++i)
for (uint8_t i = 0; i < pcf_size+1; ++i)
crc16_update( buffer[i], 8);
crc16_update( buffer[len+1] & 0xc0, 2);
crc16_update( buffer[pcf_size+1] & 0xc0, 2);
//xorout
if (xn297_scramble_enabled)
crc ^= pgm_read_word(&xn297_crc_xorout_scrambled_enhanced[xn297_addr_len-3+len]);
crc ^= pgm_read_word(&xn297_crc_xorout_scrambled_enhanced[xn297_addr_len-3+pcf_size]);
#ifdef XN297DUMP_NRF24L01_INO
else
crc ^= pgm_read_word(&xn297_crc_xorout_enhanced[xn297_addr_len - 3 + len]);
crc ^= pgm_read_word(&xn297_crc_xorout_enhanced[xn297_addr_len - 3 + pcf_size]);
#endif
uint16_t crcxored=(buffer[len+1]<<10)|(buffer[len+2]<<2)|(buffer[len+3]>>6) ;
uint16_t crcxored=(buffer[pcf_size+1]<<10)|(buffer[pcf_size+2]<<2)|(buffer[pcf_size+3]>>6) ;
if( crc == crcxored)
return pcf_size; // CRC OK
return 0; // CRC NOK
return 255; // CRC NOK
}
static bool __attribute__((unused)) XN297_IsPacketSent()