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Support #12824

Milestone #12944: New DCCT V2.1 Firmware Driver

MIDCCT Initialize Registers

Added by Roger Tokarek almost 3 years ago. Updated almost 3 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Roger Tokarek
Category:
DCCT
Start date:
06/01/2016
Due date:
% Done:

20%

Estimated time:
24.00 h
Duration:

Description

Register default values need to be set on startup. See Wiki MIRR DCCTs.

History

#1 Updated by Roger Tokarek almost 3 years ago

  • Estimated time changed from 16.00 h to 24.00 h
Steps:
  1. Translate handwritten Engineering request into Excel spreadsheet.
  2. Create a Wiki entry.
  3. Find and gather references, notes and Excel into Wiki. Create Defaults Table.
  4. Identify missing components: eg register sizes, missing default values, coefficients.
  5. Identify and understand software implementation requirements.
  6. Create and implement code.

#2 Updated by Roger Tokarek almost 3 years ago

  • % Done changed from 0 to 20
Status:

#3 Updated by Roger Tokarek almost 3 years ago

Notes:

  1. There are 64 FIR coefficients to be transferred for each FIR Filter.
  2. Nios requires a wait period during FIR coefficients transfer. Check HW_Busy register 0x008c (D8) before reading data.
  3. The vme_a32_qsys_pointer is at 0x0088 (D32).

#4 Updated by Roger Tokarek almost 3 years ago

Because we are temporarily supporting two different DCCTs (ANUB - old firmware, MIDCCT new firmware) with the same class DcctDrv, and because there are register conflicts between them, we can use the "m-command" to set the MIDCCT regsiters for now. This is a hack and is temporary.

The following is added to midcctstartup in git branch midcct_12824.

# set the MIDCCT default startup values (hack for now!)
# set in order as presented by engineering:
# see Redmine Support #12824

m 0xfbff2000+0xDC,4
0X00001FD8
.
m 0xfbff2000+0xE2,2
0X105B
.
m 0xfbff2000+0xE0,2
0X0000
.
m 0xfbff2000+0xE6,2
0X147B
.
m 0xfbff2000+0xE4,2
0X0000
.
m 0xfbff2000+0xEA,2
0X0000
.
m 0xfbff2000+0xF2,2
0X2028
.
m 0xfbff2000+0xED,1
0X01
.
m 0xfbff2000+0xEC,1
0X05
.
m 0xfbff2000+0xFE,1
0X04
.
m 0xfbff2000+0xF6,2
0X0000
.
m 0xfbff2000+0xF0,2
0X5333
.
m 0xfbff2000+0xFA,2
0X0000
.
m 0xfbff2000+0xF4,2
0X0001
.
m 0xfbff2000+0xF8,2
0X7FFF
.
m 0xfbff2000+0xFF,1
0X00
.
m 0xfbff2000+0xFC,2
0X0728
.
m 0xfbff2000+0x103,1
0X00
.
m 0xfbff2000+0x102,1
0X0A
.

#5 Updated by Roger Tokarek almost 3 years ago

Fir Filter Coefficients

Three FIR that need to the initialized, two of the three are identical.
DC and DAC0 FIR Coefficients = first 64 taps set to 32767 (x7FFF); all others = 0
AC FIR Coefficients = first tap set to 32767 (x7FFF); all others = 0

#6 Updated by Roger Tokarek almost 3 years ago

  • Parent task set to #12944

#7 Updated by Roger Tokarek almost 3 years ago

Additional MIDCCT initialization

DAC2 CIC decimation rate = 1176.
DAC0 CIC decimation rate = 8232
DAC0 CIC gain = 0
DAC0 FIR gain = 3
DAC0 FIR has 64 coefficients whose values are all 9.

Not yet implemented June 17, 2016

#8 Updated by Roger Tokarek almost 3 years ago

  • Status changed from New to Closed

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