AFE7900EVM: NCO frequency hopping using GPIO pins

Loot Goblin

Part Number: AFE7900EVM
Other Parts Discussed in Thread: AFE7900, AFE7950

Tool/software:

Hey,

I'm trying to control the 16 NCOs present in each channel of the AFE7900. Below is a part of the Latte script I'm using. However, when I try to execute the code, I'm getting the following error. Could you please advise on what might be going wrong?

#======

#Executing .. AFE79xx/NCO_Hopping/configLMK.py

#Start Time 2024-10-16 18:31:45.275000

In second Nyquist operation of TX NCO, DAC Interleaved mode is not supported.

The External Sysref Frequency should be an integer factor of: 3.84MHz

2T2R1F Number: 0

Valid Configuration: True

laneRateRx: 9830.4

laneRateFb: 9830.4

laneRateTx: 9830.4

2T2R1F Number: 1

Valid Configuration: True

laneRateRx: 9830.4

laneRateFb: 9830.4

laneRateTx: 9830.4

LMK Clock Divider - Device registers reset.

REFCLOCK is used from LMK source, ensure board connections are ok to do the same

#Done executing .. AFE79xx/NCO_Hopping/configLMK.py

#End Time 2024-10-16 18:31:46.215000

#Execution Time = 0.939999818802 s

#================ ERRORS:1, WARNINGS:1 ================#

sysParams.gpioMapping={
		'H8': 'ADC_SYNC0',
		'H7': 'DAC_SYNC0',
		'N8': 'ADC_SYNC2',
		'N7': 'ADC_SYNC3',
		'H9': 'ADC_SYNC1',
		'G9': 'DAC_SYNC1',
		'N9': 'DAC_SYNC2',
		'P9': 'DAC_SYNC3',
		'P14': 'GLOBAL_PDN',
		'K14': 'FBABTDD',
		'R6': 'FBCDTDD',
		'H15': ['TXATDD','TXBTDD'],
		'V5': ['TXCTDD','TXDTDD'],
		'E7': ['RXATDD','RXBTDD'],
		'R15': ['RXCTDD','RXDTDD'],
		'D5': 'TX_NCOSEL_0', 
		'G10': 'TX_NCOSEL_1', 
		'T6': 'TX_NCOSEL_2', 
		'T5': 'TX_NCOSEL_3'}

sysParams.useSpiSysref = False
#setupParams.skipLmk	=	False
#AFE.LMK.lmkConfig()

##############		16 NCO Params		##############
sysParams.ncoFreqMode	= "FCW"

sysStatus.txChainDirectCtrl=True
sysParams.txChainDirectCtrl=True
sysParams.ncoTxMode		=	[3,3]
sysParams.broadcastTxNcoSel = 1
sysParams.numTxNCO		=	2

for i in range(16):
	for j in range(3):
		AFE.updateTxNcoInfiniteNcoMode(j,2000,i)

Thanks in advance,

2 months ago

+1 David Chaparro 2 months ago

TI__Genius 14961 points

Hi LG,

This error is likely caused by one of the NCO settings in the script. Can you check that all of the NCO values are within the AFE7950's supported range, which has a lower limit of 600MHz?

Regards,

David Chaparro

0 Loot Goblin 2 months ago in reply to David Chaparro

Prodigy 20 points

Hi David,

Thank you for your response. The error was successfully corrected. I am currently providing a constant value for the input signal. However, when I switch NCOs and check the output, I receive some output for both NCO0 and NCO1, but it is not at the desired frequency. For the other NCOs, there is no output at all. Attached below is the Latte script I used. Could you please advise on what the issue might be?

Thanks,

'''
Validation :  AFE79xx Library Version 
				v1.67, v1.74
Case			RX					TX						   FB						CLK					Notes
----	-----------------	  -----------------			-----------------			-----------			------------
1		245.76Msps, 24410     491.52Msps, 44210			491.52Msps, 22210			FADC=2949.12M       DAC in interleaved mode
		SerDes=9830.4Mbps     SerDes=9830.4Mbps			SerDes=9830.4Mbps			FDAC=8847.36M
		PLL0, NCO=3500M		  PLL0, NCO=3500M			NCO=3500M                   REF=491.52M
		
2		245.76Msps, 24410     491.52Msps, 44210			491.52Msps, 22210			FADC=2949.12M       DAC in straight mode
		SerDes=9830.4Mbps     SerDes=9830.4Mbps			SerDes=9830.4Mbps			FDAC=8847.36M
		PLL0, NCO=3500M		  PLL0, NCO=3500M			NCO=3500M                   REF=491.52M
'''
setupParams.skipFpga 				= 1
sysParams							=	AFE.systemParams
setupParams.fpgaRefClk 				= 245.76#184.32#
AFE.systemStatus.loadTrims			= 1


sysParams.FRef                    	= 491.52
sysParams.FadcRx                  	= 2949.12
sysParams.FadcFb				  	= 2949.12
sysParams.Fdac                    	= 2949.12*4

sysParams.enableDacInterleavedMode	= True 					#DAC interleave mode to save power consumption. Fs/2 - Fin spur occurs

sysParams.modeTdd 					= 0		
										# 0- Single TDD Pin for all Channels
										# 1- Separate Control for 2T/2R/1F
										# 2- Separate Control for 1T/1R/1F			

sysParams.topLevelSystemMode		= 'StaticTDDMode'
sysParams.RRFMode 					= 0   #4T4R2F FDD mode
sysParams.jesdSystemMode			= [3,3]
										#SystemMode 0:	2R1F-FDD						; rx1-rx2-fb-fb
										#SystemMode 1:	1R1F-FDD						; rx1-rx1-fb-fb
										#SystemMode 2:	2R-FDD							; rx1-rx1-rx2-rx2
										#SystemMode 3:	1R								; rx1-rx1-rx1-rx1
										#SystemMode 4:	1F								; fb-fb-fb-fb
										#SystemMode 5:	1R1F-TDD						; rx1/fb-rx1/fb-rx1/fb-rx1/fb
										#SystemMode 8:	1R1F-TDD 1R-FDD	(FB-2Lanes)(RX1 RX2 interchanged)		; rx2/fb-rx2/fb-rx1-rx1


sysParams.jesdLoopbackEn			= 0 #Make it 1 to Enable the JESDTX to JESDRX internal loopback
sysParams.LMFSHdRx                	= ["44210","44210","44210","44210"]	
										# The 2nd and 4th are valid only for jesdSystemMode values in (2,6,7,8). For other modes, select 4 converter modes for 1st and 3rd.
sysParams.LMFSHdFb                	= ["22210","22210"]
sysParams.LMFSHdTx                	= ["44210","44210","44210","44210"]
sysParams.jesdTxProtocol            = [0,0]
sysParams.jesdRxProtocol            = [0,0]
sysParams.serdesFirmware			= True 		# If you want to lead any firmware, please speify the path here. Otherwise it will not write any firmware
sysParams.jesdTxLaneMux				= [0,1,2,3,4,5,6,7]	
												# Enter which lanes you want in each location. 
												# Note that across 2T Mux is not possible in 0.5.
												# For example, if you want to exchange the first two lines of each 2T, this should be [[1,0,2,3],[5,4,6,7]]
sysParams.serdesTxLanePolarity		= [True, True, False, False, True, True, False, False]
sysParams.jesdRxLaneMux				= [0,1,2,3,4,5,7,6]	
												# Enter which lanes you want in each location.
												# Note that across 2R Mux is not possible in 0.5.
												# For example, if you want to exchange the first two lines of each 2R, this should be [[1,0,2,3],[5,4,6,7]]
sysParams.serdesRxLanePolarity		= [True, True, True, True, False, False, False, False]
sysParams.jesdRxRbd					= [4, 4]

sysParams.rxJesdTxScr				= [False]*4
sysParams.fbJesdTxScr				= [False]*2
sysParams.jesdRxScr					= [False]*4

sysParams.rxJesdTxK					= [32]*4
sysParams.fbJesdTxK					= [32]*2
sysParams.jesdRxK					= [16]*4 #[32]*4


	
#sysParams.txNco0					= 	[[5000,5000],
#										[5000,5000],
#										[5000,5000],
#										[5000,5000]]

sysParams.rxNco0					= 	[[9500,9500],
										[9500,9500],
										[9500,9500],
										[9500,9500]]

sysParams.fbNco0					= 	[2500,2500] #[1800,1800]			#FBA, FBC for NCO0
sysParams.fbNco1					= 	[2500,2500] #[1800,1800]			#FBA, FBC for NCO1
sysParams.fbNco2					= 	[2500,2500] #[1800,1800]			#FBA, FBC for NCO2
sysParams.fbNco3					= 	[2500,2500] #[1800,1800]			#FBA, FBC for NCO3

sysParams.numBandsRx				= [0]*4					# 0 for single, 1 for dual
sysParams.numBandsFb				= [0,0]				
sysParams.numBandsTx				= [0,0,0,0]

sysParams.ddcFactorRx             	= [6]*4			# DDC decimation factor for RX A, B, C and D
sysParams.ddcFactorFb             	= [6]*2
sysParams.ducFactorTx             	= [24]*4

AFE.systemStatus.loadTrims			=1

## The following parameters sets up the LMK04828 clocking schemes
lmkParams.pllEn						=	True#False
lmkParams.inputClk					=	1474.56#737.28
lmkParams.sysrefFreq				=	2949.12/1024
lmkParams.lmkFrefClk				=	True

## The following parameters sets up the register and macro dumps
logDumpInst.setFileName(ASTERIX_DIR+DEVICES_DIR+r"\Afe79xxPg1.txt")
logDumpInst.logFormat				= 0x0f
logDumpInst.rewriteFile				= 1
logDumpInst.rewriteFileFormat4		= 1
device.optimizeWrites				= 0
device.rawWriteLogEn				= 1
lmk.rawWriteLogEn					= 1

## The following parameters sets up the SYNCIN and SYNCOUT to interface with the TSW14J57
sysParams.jesdABLvdsSync			= 0
sysParams.jesdCDLvdsSync			= 0
sysParams.rxJesdTxSyncMux			= [0,0,0,0]
sysParams.fbJesdTxSyncMux			= [0,0]
sysParams.jesdRxSyncMux				= [0,0,0,0]		#[0,0,1,1]
sysParams.syncLoopBack				= True

# ## The following parameters sets up the AGC
# sysParams.agcParams[0].agcMode = 1 ##internal AGC
# sysParams.agcParams[0].gpioRstEnable = 0 ##disable GPIO based reset to AGC detector 
# sysParams.agcParams[0].atken = [0, 1, 0] ##enable big and small step attack
# sysParams.agcParams[0].decayen = [0,1,0] ##enable big and small step decay
# sysParams.agcParams[0].atksize = [2,1,0] ## bigs step = 2dB, small step = 1dB
# sysParams.agcParams[0].decaysize = [2,1,0] ##big step = 2dB, small step = 1dB
# sysParams.agcParams[0].atkthreshold = [-1, -2, -14] ##attack threshold
# sysParams.agcParams[0].decaythreshold = [-14, -6, -20] ##decay threshold
# sysParams.agcParams[0].atkwinlength = [170, 170] ## detector time constant expressed inn absolute time in ns. 
# sysParams.agcParams[0].decaywinlength = 87380 ##detector time constant expressed in absolute time in ns. All detectors use the same value for decay time constant
# sysParams.agcParams[0].atkNumHitsAbs = [8,8] ##absolute number of times signal crosses threshold. These crossing are with respect to the FADC/8 clock
# sysParams.agcParams[0].decayNumHitsAbs = [100,100] ##absolute number of times signal crosses threshold. These crossing are with respect to the FADC/8 clock
# sysParams.agcParams[0].minDsaAttn = 0 ##minimum DSA attenuation used by AGC
# sysParams.agcParams[0].maxDsaAttn = 22 ##maximum DSA attenuation used by AGC
# sysParams.agcParams[0].totalGainRange = 22 ##total gain range used by ALC for gain compensation
# sysParams.agcParams[0].minAttnAlc = 0 ##minimum attenuation used by ALC for compensation when useMinAttnAgc = 0
# sysParams.agcParams[0].useMinAttnAgc = 1 ##enable ALC to use minimum attenuation from AGC for which compensation is required.
# sysParams.agcParams[0].alcEn = 1
# sysParams.agcParams[0].alcMode = 0 ##floating point DGC
# sysParams.agcParams[0].fltPtMode = 0 ##if exponent > 0, dont send MSB
# sysParams.agcParams[0].fltPtFmt = 1 ##3 bit exponent


## The following parameters sets up the GPIOs
sysParams.gpioMapping={
		'H8': 'ADC_SYNC0',
		'H7': 'DAC_SYNC0',
		'N8': 'ADC_SYNC2',
		'N7': 'ADC_SYNC3',
		'H9': 'ADC_SYNC1',
		'G9': 'DAC_SYNC1',
		'N9': 'DAC_SYNC2',
		'P9': 'DAC_SYNC3',
		'P14': 'GLOBAL_PDN',
		'K14': 'FBABTDD',
		'R6': 'FBCDTDD',
		'H15': ['TXATDD','TXBTDD'],
		'V5': ['TXCTDD','TXDTDD'],
		'E7': ['RXATDD','RXBTDD'],
		'R15': ['RXCTDD','RXDTDD'],
		'D5': 'TX_NCOSEL_0', 
		'G10': 'TX_NCOSEL_1', 
		'T6': 'TX_NCOSEL_2', 
		'T5': 'TX_NCOSEL_3'}

#AFE.systemParams.papParams[0]['enable'] = True
#AFE.systemParams.papParams[1]['enable'] = True
#AFE.systemParams.papParams[2]['enable'] = True
#AFE.systemParams.papParams[3]['enable'] = True

sysParams.useSpiSysref = False
#setupParams.skipLmk	=	False
#AFE.LMK.lmkConfig()

##############		16 NCO Params		##############
sysParams.ncoFreqMode	= "FCW"

sysStatus.txChainDirectCtrl=True
sysParams.txChainDirectCtrl=True
sysParams.ncoTxMode		=	[3,3]
sysParams.broadcastTxNcoSel = 1
sysParams.numTxNCO		=	2

for i in range(16):
	for j in range(4):
		AFE.updateTxNcoInfiniteNcoMode(j,3200 + 75*i,i)



		
## Initiates LMK04828 and AFE79xx Bring-up 

setupParams.skipLmk	=	False
AFE.initializeConfig()
lmkParams.sysrefFreq = AFE.systemStatus.sysrefFreq
lmkParams.lmkPulseSysrefMode = False
AFE.LMK.lmkConfig()

0 David Chaparro 1 month ago in reply to Loot Goblin

TI__Genius 14961 points

Hi LG,

Just to confirm, are you using the latest version of the AFE79xx GUI? If not I would recommend updating to the latest and see if that fixes the issues as older versions may not support it.

Can you share the output frequency of the two NCOs that are outputting a tone?

Regards,

David Chaparro

RF & microwave

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AFE7900EVM: NCO frequency hopping using GPIO pins