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I tried to implement a low pass filter and decimtion using Quatus 4.0 and
FIR compiler 3.1.0
Parameterize - FIR Compiler Megacore Function
Coefficient Specification - (low pass set [1])
Coefficients Scaling: Auto Bit Width: 12
Arichitecture specification:
Device family: Stratix
Structure: Distributed Arithmetic: fully serial filter
Pipeline level: 1
Data storage: Logic cells
Coefficients Storage: Logic cells
Rate Specification:
Decimation Factor 10
Input specifcation:
Number of input channel 1
Input number system: signed binary
Input bit width: 12
Output specification:
full resolution bit width is 24
Based on method: Acual Coefficients
output number system : full resolution
Coefficients generator dialog
Floating coefficient set
Rate specification
Decimation factor 10
filter type: low pass
window type: Hamming
coeffients: 37
Sample rate: 2.0E7
cutoff freq.1: 1.0e6
After Analysis and synthesis in Quatus 4.0, I got two warninngs
Warning: Reduced register
fir:inst|fir_st:fir_st_inst|sadd:Uaddl_0_n_2_n|res[14]~reg0 with stuck
data_in port to stuck value GND
Warning: Reduced register
fir:inst|fir_st:fir_st_inst|sadd:Uaddl_0_n_1_n|res[14]~reg0 with stuck
data_in port to stuck value GND
After simulation in Quatus 4.0, no filter output.
Can anyone help?
FIR compiler 3.1.0
Parameterize - FIR Compiler Megacore Function
Coefficient Specification - (low pass set [1])
Coefficients Scaling: Auto Bit Width: 12
Arichitecture specification:
Device family: Stratix
Structure: Distributed Arithmetic: fully serial filter
Pipeline level: 1
Data storage: Logic cells
Coefficients Storage: Logic cells
Rate Specification:
Decimation Factor 10
Input specifcation:
Number of input channel 1
Input number system: signed binary
Input bit width: 12
Output specification:
full resolution bit width is 24
Based on method: Acual Coefficients
output number system : full resolution
Coefficients generator dialog
Floating coefficient set
Rate specification
Decimation factor 10
filter type: low pass
window type: Hamming
coeffients: 37
Sample rate: 2.0E7
cutoff freq.1: 1.0e6
After Analysis and synthesis in Quatus 4.0, I got two warninngs
Warning: Reduced register
fir:inst|fir_st:fir_st_inst|sadd:Uaddl_0_n_2_n|res[14]~reg0 with stuck
data_in port to stuck value GND
Warning: Reduced register
fir:inst|fir_st:fir_st_inst|sadd:Uaddl_0_n_1_n|res[14]~reg0 with stuck
data_in port to stuck value GND
After simulation in Quatus 4.0, no filter output.
Can anyone help?