DEPFET Q2M1 Power Procedure

Description

This MR offers a validated power up and down procedure for the DSSC2 for a single module (Q2M1).

How Has This Been Tested?

The MPOD is powered through Karabo using the DETLAB_DSSC2/PSC/MPOD2, DETLAB_DSSC2/PSC/TAG_GROUP_Q2, and Manual Powering Instructions. Only a single module, M1 was powered up and down.

Shutdown order matters.

Validation of channel order done while powering up:

import requests
from time import monotonic                      
def power_all_on():                              
     tstart = monotonic()                         
     print(requests.get("http://192.168.140.67/power?group=AON&output=on"))  # Group does not exist, validate that error handled, expect HTTP 406                                   
     print(requests.get("http://192.168.140.67/power?group=ASICS&output=on"))                                 
     print(requests.get("http://192.168.140.67/power?group=HV&output=on"))                                    
     print(requests.get("http://192.168.140.67/power?group=ISVOLTAGE&output=on"))                             
     print(requests.get("http://192.168.140.67/power?group=PLCSOURCE&output=on"))                             
     print("Took ", monotonic() - tstart) 

Command used for triggering power down from microcontroller:

import requests
from time import monotonic
def off():
     tstart = monotonic()
     print(requests.get("http://192.168.140.67/alloff?token=CWH").json()['groups'])
     print("Took ", monotonic() - tstart)

Test Protocol:

• Power auto-on from Karabo, trigger complete shutdown from microcontroller: AON channels go down.
• Power auto-on, ASICs from Karabo, trigger complete shutdown from microcontroller: IOBA, IOB, RB, MBJT, AON channels go down.
• Power auto-on, ASICs, HV from Karabo, trigger complete shutdown from microcontroller: BACK, RING2, RING1, IS, IOBA, IOB, RB, MBJT, AON channels go down.
• Power all on: auto-on, ASICs, HV, PLC, SG from Karabo, trigger complete shutdown from microcontroller: SG, PLC, IS (set to 2.5v), BACK, RING2, RING1, IS (off), IOBA, IOB, RB, MBJT, AON channels go down.

TODOs:

• Implement voltage check on power up (is sense voltage == target voltage?):
  Not strictly needed as channel goes from RAMPING to ON when setting voltage, but would not hurt. A feature on its own, better handled in separate MR.
• Implement way to trigger power down from serial interface to testing purposes:
  Outside of scope of this MR. Will be done in subsequent MR.

mpod.cpp

@@ -23,6 +23,10 @@ SNMP::Message *MPOD::read(uint16_t channel) {
     snmp_cmd += channel;
     message->add(snmp_cmd.c_str());
 
+    snmp_cmd = OID::NAMES[OID::OUTPUTVOLTAGE];
+    snmp_cmd += channel;
+    message->add(snmp_cmd.c_str());
+
     snmp_cmd = OID::NAMES[OID::OUTPUTMEASUREMENTSENSEVOLTAGE];
     snmp_cmd += channel;
     message->add(snmp_cmd.c_str());
@@ -31,6 +35,10 @@ SNMP::Message *MPOD::read(uint16_t channel) {
     snmp_cmd += channel;
     message->add(snmp_cmd.c_str());
 
+    snmp_cmd = OID::NAMES[OID::OUTPUTCURRENT];
+    snmp_cmd += channel;
+    message->add(snmp_cmd.c_str());
+
     return message;
 }
 
@@ -202,9 +210,6 @@ void initializeSNMP() {
     Serial.println("SNMP Server Started");
 }
 
-/* setChannelAndWait
- * Set a channel's parameters and wait until it's settled.
- */
 void setChannelStateAndWait(const IPAddress *ipAddr, const uint16_t channel, const uint8_t output) {
     // Send set command
     SNMP::Message *snmp_msg = mpod.setChannelState(channel, output);
@@ -244,6 +249,5 @@ void setChannelVoltageAndWait(const IPAddress *ipAddr, const uint16_t channel,
         delete snmp_msg;
         delay(MPOD_UPDATE_LATENCY);
         snmp.loop();
-    } while (mpod.isRampingDown() ||
-             mpod.isRampingUp());  // TODO check applied voltage close to target voltage
+    } while (mpod.isRampingDown() || mpod.isRampingUp());
 }