RD Controls Hardware Release Note 25.0

CAMAC C1005 Module

Steven's Silly Serial Module (SSSM)

R. West

August 30, 1989

Introduction

The C1005 CAMAC module transmits the command V (trigger a field measurement) to a Group3 Model DTM-100 Series Hall Effect Teslameter connected via an RS232 interface whenever an external signal is input to the module. The teslameter is connected to the module's rear I/O connector and the external signal is input to the module on this same rear I/O connector. In addition, the C1005 module will pass to the teslameter any input received via the module's front panel RS232 I/O connector.

Module Configuration

• Zilog 8002 16-bit processor
• Zilog 8036 Counter/Timer
• up to 32K of RAM
• up to 32K of ROM
• CMCSLV - CAMAC functions are handled by an ALTERA EP1800 EPLD chip
• DUART - RS232 communication functions are handled by a dual power MAX232 and Signetics SCN2681 communications chip
  • 8 data bits
  • 1 stop bit
  • no parity
  • baud rate selectable from 300 to 19200
  • no echo
  • no RTS
  • no CTS

On the front panel of the module are the following buttons and indicators:

• N LED - indicates when the crate controller has initiated a dataway cycle addressed to the module's slot
• LAM LED - indicates the module is asserting its slot's dataway LAM signal
• LAMEN LED - indicates unmasked bits in the LAM source register will cause module LAM to be asserted
• HB LED - indicates failure of the processor. The Heart Beat is generated by software via the Counter/Timer circuit (2 second one shot).
• RESET Button - resets the processor, peripheral chips, and other circuits
• ST LEDs - eight status LEDs which may be used by application software

RS232 Interface Configuration

• 9600 baud
• 8 data bits
• no parity
• 1 stop bit

Group3 Model DTM-100 Series Hall Effect Teslameter

The DTM-100 may be configured by use of DIP switches to transmit each new reading on the serial line in a known format at a maximum rate of 2.34 Hz.

Switch Settings

• switch S1-6 = 1 - one stop bit
• switch S1-7 = 0 - no parity
• switch S1-8 = 1 - 8 transmission/reception data bits

The RS232 jumpers on the processor board must be connected in the following manner:

• options pins: single device system
• handshake pins: +5 volts for both CTS and DCD
• t/m pins: terminal mode

Teslameter Initialization

• CTRL-X - reset the system, reinstating all default values and returning the message RESET

CAMAC Functions

• Identify
  • F6 A0 - Read module number
  • F6 A1 - Read software version
• Hardware
  • F8 A0 - Test LAM
  • F9 A0 - Reset module
• LAM
  • F1 A13 - Read LAM mask register
  • F1 A14 - Read LAM source register
  • F10 A0 - Clear LAM source register
  • F17 A0 - Clear selected LAM source register bits
  • F17 A13 - Write LAM mask register
  • F17 A14 - Write LAM source register
  • F24 A0 - Disable LAM
  • F26 A0 - Enable LAM
• Fast On-line Protocol (FOP) for software diagnostics
  • F6 A3 - Read FOP status
  • F6 A4 - Read FOP reply data
  • F19 A2 - Write FOP command
  • F19 A3 - Write FOP data
• Data
  • F6 A2 - Read selected options

Function Code Descriptions

F1 A13 - Read LAM mask register

F1 A14 - Read LAM source register

F6 A0 - Read module number

This function always returns the decimal value 1005.

F6 A1 - Read software version

A sixteen-bit value is returned with the major version number (release) in the most significant byte and the revision level number in the least significant byte.

F6 A2 - Read selected options

This function returns a reading of the switch settings on the I/O connector used to indicate the type of the attached meter. Only the low 8 bits are significant. Any value but 00 indicates a 9600 baud teslameter is connected.

F6 A3 - Read FOP status

F6 A4 - Read FOP reply data

F8 A0 - Test LAM

This function indicates if the module has requested LAM, independent of whether or not LAM is enabled. If the module has requested LAM, Q is returned. Otherwise, no Q is returned. This function is totally implemented in hardware and does not interrupt the embedded processor.

F9 A0 - Reset module

This function is totally implemented in hardware. It is equivalent to pressing the reset button on the module's front panel, causing the embedded processor to be reset. Q is always returned. However, trying to communicate with the module before the reset is complete results in no Q.

F10 A0 - Clear LAM source register

This function clears the entire LAM source register.

F17 A0 - Clear selected LAM source register bits

This functions clears selected bits in the LAM source register. The user must supply a 16-bit word which has a bit set for each corresponding LAM bit which is to be cleared.

F17 A13 - Write LAM mask register

This functions writes the accompanying 16-bit word to the LAM mask register.

F17 A14 - Write LAM source register

This function sets selected bits in the LAM source register. The user must supply a 16-bit word which has a bit set for each corresponding LAM bit which is to be set.

F19 A2 - Write FOP command

F19 A3 - Write FOP data

F24 A0 - Disable LAM

This function disables the assertion of LAM to the crate controller.

F26 A0 - Enable LAM

This function enables the assertion of LAM to the crate controller. Any LAM request made while LAM was disabled is immediately asserted.

Status LEDs

All status LEDs are cleared whenever a carriage return is received.

• ST 0 - receiving ASCII character input
• ST 1 - receiving CAMAC commands
• ST 3 - trigger pulse latched on
• ST 7 - RS232 interface error (framing, parity, overrun)