The DaqMux component of the FPGA in the application board of the ATCA allows the user to stream upto four streams of chosen data from each AMC daughter board to the IOC. Each application card is configured to have 2 DaqMuxes; one for each AMC daughter board. The main graphical user interface for configuring the DaqMux is quite simple and masks a lot of the DaqMux configurations. It only allows the user to choose the basic: the source of each of the 4 streams of each DaqMux and to stimulate a trigger in any of the two DaqMuxes. The Graphical user interface of a DaqMux is shown in the figure 1.
Figure 1: DaqMux Graphical user interface
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Updated table extracted from the DaqMux.yaml (incomplete)
| Register name | Address | Access | Bits | PV Name | Sub-name | Description |
|---|---|---|---|---|---|---|
Control | 0x0 | RW | 0 | Software Trigger Enable | Triggers DAQ on all enabled channels | |
| 1 | Cascade Sw Trigger mask | Mask for enabling/disabling cascaded trigger
| ||||
| 2 | Auto Rearm Hw Trigger | Mask for enabling/disabling hardware trigger. If disabled it has to be rearmed by ArmHwTrigger.
| ||||
| 3 | bit3: Arm Hardware Trigger (Arms the trigger on rising edge) | |||||
| 4 | bit4: Clear status | |||||
| 5 | bit5: DAQ Mode '0' - Triggered - Normal DAQ mode - Has to be triggered to start (Other reqs. to start: Enabled, dataValid, tReady, pause). - Stream stops if Error occurs. '1' - Continuous - The data is framed and continuously streamed out after enabled. - Has to be triggered to start (Other reqs. to start: Enabled, dataValid, tReady, pause). - Disable the stream to stop. - Freeze buffers inserts flag into the tUser bit at tLast - Stream stops if Error occurs. | |||||
| 6 | bit6: Add 128-bit header (otherwise data will be inserted) '0' - Disabled '1' - Enabled | |||||
| 7 | bit7: Software freeze buffer (Freezes all enabled circular buffers) | |||||
| 8 | bit8: Hardware freeze buffer mask | |||||
| Status | 0x1 | RO | bit0: Software Trigger Status (Registered on first trigger until cleared by Control(4)) bit1: Cascade Trigger Status (Registered on first trigger until cleared by Control(4)) bit2: Hardware Trigger Status (Registered on first trigger until cleared by Control(4)) bit3: Hardware Trigger Armed Status (Registered on rising edge Control(3) and cleared when Hw trigger occurs) bit4: Combined Trigger Status (Registered when trigger condition is met until cleared by Control(4)) bit5: Freeze buffer occurred (Registered on first freeze until cleared by Control(4)) | |||
| Decimation | 0x2 | RW | bit 15-0 Sample rate divider (Decimator): Only powers of two allowed if Averaging is enabled (DataFormat(7) = '1'): 1,2,4,8,16,etc (max 2^15) Comment: If only powers of two allowed: why not encode this way? 0..16 (bit 4..0) A: We will also have an option to disable averaging (Steve needs data without averaging). If the Averaging will be disabled also other decimation factors will be allowed DataFormat(7) Comment: Do we need to set decimation per channel? The samples will be averaged (running average filter with powers of 2 window size). | |||
| DataSize | 0x3 | RW | Data buffer size. - Number of 32-bit words (if enabled header will be included in the first 14 words of data). - Minimum size is 14 (the size of the header). Comment: Not sure this is more confusing than beneficial. IMO we should just use one of these. A: Agree we will use number of 32-bit words as in old version. | |||
| TimeStamp[31:0] | 0x4 | RO | Timestamp [31:0] - secPastEpoch | |||
| TimeStamp[63:32] | 0x5 | RO | Timestamp [63:32] - nsec | |||
| Multiplexer | 0x10-0x1F | RW | 0x1x: Stream x: Channel select Multiplexer 0 - Disabled, 1 - Test, 2 - Ch0, 3 - Ch1, 4 - Ch2 etc.(up to Ch29) Comment: Fw implementation wise I still think this format is optimal? Will use enums in YAML to make it more user friendly Test mode will output counter data | |||
| DaqStatus | 0x20-0x2F | RO | 0x2x: Stream x DaqStatus: bit 0: Raw diagnostic stream control Pause bit 1: Raw diagnostic stream control Ready bit 2: Raw diagnostic stream control Overflow bit 3: Error during last Acquisition (Raw diagnostic stream control Ready or incoming data valid dropped) bit 4: Incoming data lane valid bit 5: DAQ Enabled bit 31-6: Number of packets (4k byte frames) sent | |||
| DataFormat | 0x30-0x3F | RW | 0x3x: Stream x DataFormat: bit 4-0: DataWidth (Zero inclusive). Selects the sign extension bit. Note: The sign extension is active if "'1'- Signed" is selected. The DataWidth should point to the bit number for example: 16-bit data -> DataWidth = 0xF, 32-bit data -> DataWidth = 0x1F bit 5: '0' - 32-bit, '1'- 16-bit bit 6: '0' - Unsigned, '1'- Signed bit 7: Decimation Averaging '0' - Disabled, '1'- Enabled | |||
| TBD | ||||||
| TBD |
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