part 1: PST.. Experimental event / trigger support for Pico SCPI labTool - 1: investigate 
part 2: PST.. Experimental event / trigger support for Pico SCPI labTool - 2: design the registers 
part 3: PST.. Experimental event / trigger support for Pico SCPI labTool - 3: Instrument Specific Registers Test
part 4: PST.. Experimental event / trigger support for Pico SCPI labTool - 4: let TinyUSB USBTMC code use SCPI-LIB's Status Byte register 
part 5:  PST.. Experimental event / trigger support for Pico SCPI labTool - 5: Propagation to IEEE488.2 SCPI Registers Test 
part 6: PST.. Experimental event / trigger support for Pico SCPI labTool - 6: Service Request from Instrument to LabVIEW flow 
part 7: PST.. Experimental event / trigger support for Pico SCPI labTool - 7: Test Service Request from Instrument to LabVIEW flow 

Test Setup

I continue from post 3  PST.. Experimental event / trigger support for Pico SCPI labTool - 3: Instrument Specific Registers Test. 

We managed to fan a negative transition on Digital In PIN 2 (a button connected to GPI27), to the standard Operation Status register. Let's now test the upstream up to STB and SRE

Tests will systematically test

• can I propagate an event from the Operation Status register to the Status Byte register?
• did I land in the SCPI-LIB and USBTMC Service Request invocation code?

Test IEEE488.2 Standard Registers

Let's first bring the device in the condition that button presses fan out to OPERATION STATUS EVENT register.

STATus:OPERation:DIGItal:INPut:NTRansition 4\n
STATus:OPERation:DIGItal:INPut:ENABle 4\n
*CLS\n

Do this before each of the test cases. This will take care that the next button push will propagate to that bit.

test 1: OPERATION STATUS ENABLE and STB registers

condition:

1. When OPERATION STATUS EVENT register Bit 0 is set (see part 3 on how to do that), STB OPS bit (Bit 7) should not be set (we have not enabled it)
2. Set OPERATION STATUS ENABLE register bit 0 to 1. Query it back.
3. STB OPS bit (Bit 7) should still be 0,  because we did not generate an OPERATION STATUS event
4. Push the button to make OPERATION STATUS EVENT Bit 0 go to 1. STB Pin 7 should now be 1

result;

1:Query STB by pressing the VI VISA tool's Read Status Byte button (this does not clear bits)

0

2: Enable the fan-out, and check back

STATus:OPERation:ENABle 1
STATus:OPERation:ENABle?
1

3: Query STB by pressing the VI VISA tool's Read Status Byte button (this does not clear bits)

0

4: Push the button. Push the button STB Bit 7 should be 1

128

pass

test 2: SERVICE REQUEST ENABLE register (and do we land in the Service Request code?)

condition:

1. Start the firmware in a debugger. Set a breakpoint in first line of SCPI lib source file ieee488.c, function writeControl(). Run the test case initialisation commands.
   Enable the Operation Status propagation too.
   Debugger should not break yet.
2. Set SERVICE REQUEST ENABLE register OPER Bit 7 to 1. Query it back.
   Push the button to make OPERATION STATUS EVENT Bit 0 go to 1. The debugger should break

result;

1: I use VSCode. Started the firmware in debug mode with the breakpoint set. Executed the 3 initialisation SCPI commands

2: Enable propagation by setting SRE Bit 7 (OPER Bit) to 1, and control if it is set

*SRE 128
*SRE?
128
#push
code breaks :)

pass

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