AFE7906: Dynamic NCO switching

Hi Ramanathan,

The configuration guide is correct that the numRxNco parameter can only support up to 2 NCOs, which is why we mention to set the parameter to a value of '2'. To use the other NCOs you can use the updated parameters listed in both the 'AFE79xx_16_RX_NCOs.pdf' and 'AFE79xx_16_TX_NCOs.pdf' documents. These documents also have the instructions on how to switch between the NCOs. 

Have you had a chance to try the steps outlined these documents? 

Regards,

David Chaparro 

Hi Ramanathan,

In your script I see that you are updating the NCO frequencies correctly, but I do not see any switching of the NCOs happening in your script. Are you doing this in another script? 

Please note that as mentioned in section 3 "Switching NCOs" of the 'AFE79xx_16_TX_NCOs.pdf' document the RX_CHOSEL_x inputs are used to switch between the NCOs.

You can use the AFE.IOWRAP.overrideFunction('RX_NCOSEL_x', override_enable, override_value) function to override the GPIO inputs to a certain value. 

The below script is an example of how this can be done. To switch to NCO 1 you can use 'AFE.IOWRAP.overrideFunction('RX_NCOSEL_0',1,1)'. 

##############		Read me			##############
#In HSDC Pro ADC tab, Select AFE79xx_6RX_24410; Data Rate = 245.76M ---> To capture 4 RX and 2 FB channels

sysParams=AFE.systemParams
sysParams.__init__();sysParams.chipVersion=chipVersion

setupParams.skipFpga = 0 # setup FPGA (TSW14J56) using HSDC Pro 

##############		Top Level			##############
sysParams.FRef			= 307.2
sysParams.FadcRx		= 2457.6
sysParams.FadcFb		= 2457.6
sysParams.Fdac			= 2457.6*3
sysParams.externalClockRx=False
sysParams.externalClockTx=False
													
##############		Digital Chain		##############

		#####	RX	#####
sysParams.ddcFactorRx	=	[8,8,8,8]			#DDC decimation factor for RX A, B, C and D
sysParams.rxNco0		= 	[[614.4,5400],			#Band0, Band1 for RXA 
							[614.4,500],        	#Band0, Band1 for RXB 
							[614.4,2500],        	#Band0, Band1 for RXC 
							[614.4,1800]]        	#Band0, Band1 for RXD 

		#####	FB	#####
sysParams.ddcFactorFb	=	[8,8]					#DDC decimation factor for FB 1 and 2
sysParams.fbNco0		= 	[614.4,1800]				#Band0 for FB1 and FB2 

		#####	TX	#####
sysParams.txEnable = [False,False,False,False]
sysParams.ducFactorTx	=	[24,24,24,24]			#DDC decimation factor for TX A, B, C and D
sysParams.txNco0		= 	[[5400,5400],			#Band0, Band1 for TXA 
							[500,500],        	#Band0, Band1 for TXB 
							[2500,2500],        	#Band0, Band1 for TXC 
							[1800,1800]]        	#Band0, Band1 for TXD 


##############		JESD		##############

		#####	ADC-JESD	#####
sysParams.jesdSystemMode= [1,1]
													#SystemMode 0:	2R1F-FDD						; rx1-rx2-fb -fb
													#SystemMode 1:	1R1F-FDD						; rx -rx -fb -fb
													#SystemMode 2:	2R-FDD							; rx1-rx1-rx2-rx2
													#SystemMode 3:	1R								; rx -rx -rx -rx
													#SystemMode 4:	1F								; fb -fb- fb -fb
													#SystemMode 5:	1R1F-TDD						; rx/fb-rx/fb-rx/fb-rx/fb
													
sysParams.jesdTxProtocol= [0,0]						# 0 - 8b/10b encoding; 2 - 64b/66b encoding 
sysParams.LMFSHdRx		= ["24410","24410","24410","24410"]
													# The 2nd and 4th are valid only for jesdSystemMode values in (0,2).
													# For other modes, select 4 converter modes for 1st and 3rd.
sysParams.LMFSHdFb		= ["12410","12410"]

sysParams.rxJesdTxScr	= [True,True,True,True]
sysParams.fbJesdTxScr	= [True,True]

sysParams.rxJesdTxK		= [16,16,16,16]
sysParams.fbJesdTxK		= [16,16]

sysParams.jesdTxLaneMux	= [0,1,2,3,4,5,6,7]			# Enter which lanes you want in each location. 
													# 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]]

		#####	DAC-JESD	#####
sysParams.jesdRxProtocol= [0,0]
sysParams.LMFSHdTx		= ["44210","44210","44210","44210"]
sysParams.jesdRxLaneMux	= [0,1,2,3,4,5,6,7]			# Enter which lanes you want in each location.
													# 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.jesdRxRbd		= [4, 4]
sysParams.jesdRxScr		= [True,True,True,True]
sysParams.jesdRxK		= [16,16,16,16]

		#####	JESD Common	#####
	
sysParams.jesdABLvdsSync= True
sysParams.jesdCDLvdsSync= True
sysParams.syncLoopBack	= False	#JESD Sync signal is connected to FPGA

##############		GPIO		##############
sysParams.gpioMapping	= {
						'H8': 'ADC_SYNC0',
						'H7': 'ADC_SYNC1',
						'N8': 'ADC_SYNC2',
						'N7': 'ADC_SYNC3',
						'H9': 'DAC_SYNC0',
						'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'],
						'G6': 'RX_NCOSEL_0', 
						'G7': 'RX_NCOSEL_1', 
						'G8': 'RX_NCOSEL_2', 
						'R5': 'RX_NCOSEL_3'}

##############		LMK Params		##############
lmkParams.pllEn			= False
lmkParams.inputClk		= 614.4 # Valid only when lmkParams.pllEn = False
lmkParams.lmkFrefClk	= True
setupParams.fpgaRefClk	= 307.2 # Should be equal to LaneRate/40 for TSW14J56

##############		Logging		##############
logDumpInst.setFileName(ASTERIX_DIR+DEVICES_DIR+r"\Afe79xxPg1.txt")
logDumpInst.logFormat=0x0 #Modify to 0x1 to save register scequence to log file. Script takes more time to execute.
logDumpInst.rewriteFile=1
logDumpInst.rewriteFileFormat4=1
device.optimizeWrites=0
device.rawWriteLogEn=1

device.delay_time = 0

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

sysParams.ncoRxMode		=	[6,6]
sysParams.broadcastRxNcoSel = 1
sysParams.numRxNCO		=	2

#-------------------------------------------------------------------------------------------------#
AFE.deviceBringup()

AFE.TOP.overrideTdd(15,3,0)	# bit-wise; 4R,2F,4T

##############		Update NCOs		##############
freqList= [614.4,1843.2,921.6,1228.8]
for i in range(4):
	for j in range(4):
		AFE.updateRxNcoMultiNcoMode(j,freqList[i],i)
		AFE.updateTxNcoMultiNcoMode(j,freqList[i],i)
		
##############		Switch NCOs		##############
AFE.IOWRAP.overrideFunction('RX_NCOSEL_0',1,1) 
AFE.IOWRAP.overrideFunction('RX_NCOSEL_1',1,1)
# AFE.IOWRAP.overrideFunction('RX_NCOSEL_2',0,0)
# AFE.IOWRAP.overrideFunction('RX_NCOSEL_3',0,0)

Regards,

David Chaparro