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Power Supply Controller Generator


MODULE ID
0x507E1712
(1350440722)


Description


This module can generate sine waveform for multiple power supplies.
It is built to work in association with ComCorr IP.


The module outputs waveform as signed values on its TDATA output.
The TUSER output carries the Identifier of the waveform.


It is possible to generate up to 2**C_W_TIDX (default 255) Identifiers.
Each waveform has independents parameters:


Phase increment


Phase offset


Scaling value


Offset value


Reset phase


The module generate data values every TICKER_RATE clock period.
At each of this tick, the phase of all waveform is incremented and a new wave value is computed for each waveform.
The values are output via the AXI-Stream Output, one value transaction by transfer.


Runtime configuration


The generator will compute and ouput values for Identifier from TABLE_DEPTH downto 0.
Entries in the TABLE_PHASE and TABLE_SCALE for these Identifier shall be configured by the user.
These two tables are addressed by the Identifier number.
Data values pack configuration, as described below.


Table 1. TABLE_PHASE_INCR data pack.


32-C_W_PHASE bits
C_W_PHASE bits


unused
Phase increment


Table 2. TABLE_PHASE_OFFS data pack.


31-*C_W_PHASE bits
1 bit
C_W_PHASE bits


unused
Reset accumulator
Phase offset


Table 3. TABLE_SCALE data pack.


32-C_W_OFFSET-C_W_SCALE bits
C_W_OFFSET bits
C_W_SCALE bits


unused
Signal Offset
Signal Scale Factor


The DDS contained in the module receive the phase value, computed from the sum of the accumulator and the Phase Offset configuration.
The accumulator is incremented by the Phase Increment at each tick.
The result roll over the max value.


The output of the DDS is multiplied by the Signal Scale Factor, which is considered as a fixed point value, containing only decimals.
(The DDS is configured to genrate full scale sine values).
The Signal Offset is then applied, aligned on the fixed point (no decimals).
The final result is scrapped of decimals values.


AXIS output format


The generator produces AXIS packets with a compatible format for COMCORR IP module.


The AXIS contains:


TDATA: the sine waveform value (signed integer).


TUSER: the PSCID.


TVALID: data strobe.


The AXIS does not contain TREADY input on this module.
The COMCORR IP module does not either.


Registers map


Table 4. Register


Name
N
bits
type
RW
Description


ID
1
32
uint
RO
Module Identification Number


VERSION
1
32
uint
RO
Module Version Number


CONTROL
1
1
uint
RW
Control register


TICKER_RATE
1
32
uint
RW
Ticker rate register


TABLE_DEPTH
1
8
uint
RW
Table scan depth register


Table 5. Memories


Name
N
bits
type
RW
Description


TABLE_PHASE_INCR
256
31
uint
RW
Phase increment table


TABLE_PHASE_OFFS
256
31
uint
RW
Phase offset and reset table


TABLE_SCALE
256
32
uint
RW
Signal scale and offset table


TODO / Future devs


The PSCID is now a simple count down from TABLE_DEPTH to 0.
A table to translate from this count to a proper PSCID will be implemented.
In the meantime, a correct configuration of the COMCORR module shall suffice.