gomaomao/DIY-Multiprotocol-TX-Module
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FrSkyX LBT RSSI timing improvement

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This commit is contained in:
pascallanger 2019-10-27 16:44:36 +01:00
parent 9f1bdc901c
commit 400fdb3cc6
2 changed files with 48 additions and 49 deletions
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92
Multiprotocol/FrSkyX_cc2500.ino
View File

@ -297,51 +297,8 @@ uint16_t ReadFrSkyX()
FrSkyX_initialize_data(0);
hopping_frequency_no=0;
BIND_DONE;
state++;
state++; //FRSKY_DATA1
break;
case FRSKY_DATA1:
if ( prev_option != option )
{
CC2500_WriteReg(CC2500_0C_FSCTRL0,option); //Frequency offset hack
prev_option = option ;
}
FrSkyX_set_start(hopping_frequency_no);
transmit=true;
#ifdef FRSKYX_LBT
CC2500_Strobe(CC2500_SIDLE);
state++;
return 210; //Wait for the freq to stabilize
case FRSKY_DATA2:
CC2500_Strobe(CC2500_SRX); //Acquire RSSI
state++;
return 20;
case FRSKY_DATA3:
uint8_t rssi;
rssi = CC2500_ReadReg(CC2500_34_RSSI | CC2500_READ_BURST); // 0.5 db/count, RSSI value read from the RSSI status register is a 2's complement number
if ((sub_protocol & 2) && rssi > 72 && rssi < 128) //LBT and RSSI between -36 to -8.5 dBm
{
transmit=false;
debugln("Busy %d %d",hopping_frequency_no,rssi);
}
#endif
CC2500_SetTxRxMode(TX_EN);
CC2500_SetPower();
CC2500_Strobe(CC2500_SFRX);
hopping_frequency_no = (hopping_frequency_no+FrSkyX_chanskip)%47;
CC2500_Strobe(CC2500_SIDLE);
if(transmit)
CC2500_WriteData(packet, packet[0]+1);
state=FRSKY_DATA4;
return 5200;
case FRSKY_DATA4:
CC2500_SetTxRxMode(RX_EN);
CC2500_Strobe(CC2500_SIDLE);
state++;
return 200;
case FRSKY_DATA5:
CC2500_Strobe(CC2500_SRX);
state++;
return 3100;
case FRSKY_DATA6:
telemetry_set_input_sync(9000);
len = CC2500_ReadReg(CC2500_3B_RXBYTES | CC2500_READ_BURST) & 0x7F;
@ -374,11 +331,52 @@ uint16_t ReadFrSkyX()
}
FrSkyX_build_packet();
state = FRSKY_DATA1;
#ifdef FRSKYX_LBT
return 270;
#else
#if not defined(FRSKYX_LBT)
return 500;
#endif // for LBT just continue to DATA1 right away
case FRSKY_DATA1:
if ( prev_option != option )
{
CC2500_WriteReg(CC2500_0C_FSCTRL0,option); //Frequency offset hack
prev_option = option ;
}
FrSkyX_set_start(hopping_frequency_no);
transmit=true;
#ifdef FRSKYX_LBT
CC2500_Strobe(CC2500_SIDLE);
state++;
return 100; //Wait for the freq to stabilize
case FRSKY_DATA2:
CC2500_Strobe(CC2500_SRX); //Acquire RSSI
state++;
return 400;
case FRSKY_DATA3:
uint8_t rssi;
rssi = CC2500_ReadReg(CC2500_34_RSSI | CC2500_READ_BURST); // 0.5 db/count, RSSI value read from the RSSI status register is a 2's complement number
if ((sub_protocol & 2) && rssi > 72 && rssi < 128) //LBT and RSSI between -36 to -8.5 dBm
{
transmit=false;
debugln("Busy %d %d",hopping_frequency_no,rssi);
}
#endif
CC2500_SetTxRxMode(TX_EN);
CC2500_SetPower();
CC2500_Strobe(CC2500_SFRX);
hopping_frequency_no = (hopping_frequency_no+FrSkyX_chanskip)%47;
CC2500_Strobe(CC2500_SIDLE);
if(transmit)
CC2500_WriteData(packet, packet[0]+1);
state=FRSKY_DATA4;
return 5200;
case FRSKY_DATA4:
CC2500_SetTxRxMode(RX_EN);
CC2500_Strobe(CC2500_SIDLE);
state++;
return 200;
case FRSKY_DATA5:
CC2500_Strobe(CC2500_SRX);
state++;
return 3100;
}
return 1;
}

5
Multiprotocol/_Config.h
View File

@ -224,8 +224,7 @@
//FrSkyX specific setting
//-----------------------
//EU LBT setting
//If commented the TX will not check if a channel is busy before transmitting
//EU LBT setting: if commented the TX will not check if a channel is busy before transmitting.
//#define FRSKYX_LBT
//DSM specific settings
@ -270,6 +269,8 @@
//For er9x it depends if you have an inveter mod or not on the telemetry pin. If you don't have an inverter comment this line.
//=>OpenTX 2.3.2 with a STM32 or OrangeRX module this setting can be ignored.
#define INVERT_TELEMETRY
//For STM32 and OrangeRX modules, comment to prevent the TX from forcing the serial telemetry polarity normal/invert.
#define INVERT_TELEMETRY_TX
//Uncomment if you don't want to send Multi status telemetry frames (Protocol available, Bind in progress, version...)
//Use with er9x/erskyTX, for OpenTX MULTI_TELEMETRY below is preferred instead