clean up clean up everybody everywhere clean up clean up come on everybody do your share

Grandfatherclock.md

@@ -1,4 +1,4 @@
-# Version 3:
+# Version 3
 
 ## To Figure Out
 
@@ -11,17 +11,18 @@
     6.  Best GPS Antenna+Cable for it
     7.  PPS Settings
     8.  UART Speed settings
-    9.  Any pulse out (32kHz maybe?)
+    9.  Any pulse out (32kHz/ maybe?)
 2.  [Pulsar Clock](Pulsar-Clock.md)
     1.  all daaat shit lmao
 
 ## Hardware
 
 1.  Raspberry Pi 5 16GB
-    
     1.  Raspberry OS Lite
-        
     2.  Will need to carefully use real time priority, maybe even pinned to a core?
+    3.  gpsd, etc?
+    4.  reading pulses/etc
+    5.  uart?
 
 ```bash
 sudo taskset -cp 2 1234 # set task pid 1234 pin to core 2
@@ -30,44 +31,82 @@ sudo taskset -cp 2 1234 # set task pid 1234 pin to core 2
 ```bash
 sudo chrt -f -p 90 1234 # set pid 1234 to priority 90 (1-99  highest)
 ```
-1.  RTC 32khz pulses
+
+1.  RTC 32khz pulses (31.25us period)
+    
 2.  pulsar readings
-3.  RTC set/read
+    
+3.  RTC set/read over i2c
+    
 4.  GPS Module PPS
-    1.  gpsd, etc?
+    
 5.  NVME hat for NVME boot (? IF NOT INTERFERE WITH GPIO SHIT)
     
     1.  NVME SSD (? IF NOT INTERFERE WITH GPIO SHIT)
 6.  **Custom Hat**
     
-    1.  1.  [RTC](https://www.adafruit.com/product/3013#tutorials) x2
+    1.  [Adafruit DS3231 RTC Precision I2C Breakout Module](https://www.adafruit.com/product/3013#tutorials) x1  
-            
+        [CR1220](https://www.adafruit.com/products/380) x1 (Battery)
-            1.  [CR1220](https://www.adafruit.com/products/380) x2 (Battery)
+7.  [Gen 10 Timekeeping Specific GPS Module - NEO-F10T](https://gnss.store/collections/neo-f10t-timing-gnss-modules)
-        1.  Gen 10 Timekeeping Specific GPS Module - NEO-F10T
     
     1.   [Buy Varieties (Europe)](https://gnss.store/collections/neo-f10t-timing-gnss-modules)
         
         1.  Make sure battery TYPE and APPLICATION is figured out
-                    1.  May have to solder in holder or something
-                2.  Make sure GPIO pins are FUCKING 2.54mm AND 3.3v OR 5v
-                    1.  use goldddd ones~
-                3.  Make sure antenna connector is gonna work
-                    1.  GPS cable
-                    2.  GPS antenna
-            2.  [Product Summary](https://content.u-blox.com/sites/default/files/documents/NEO-F10T_ProductSummary_UBX-22025534.pdf)
             
-            3.  [Data Sheet](https://content.u-blox.com/sites/default/files/documents/NEO-F10T_DataSheet_UBX-22022576.pdf)
+        2.  May have to solder in holder or something
+8.  GPS Module  
+    1\. [Gen 10 Timekeeping Specific GPS Module - NEO-F10T](https://gnss.store/collections/neo-f10t-timing-gnss-modules)
     
-            4.  [Hardware Integration Guide](https://content.u-blox.com/sites/default/files/documents/NEO-F10T_IntegrationManual_UBX-22018271.pdf)
+    1.  [Product Summary](https://content.u-blox.com/sites/default/files/documents/NEO-F10T_ProductSummary_UBX-22025534.pdf)
+    2.  [Data Sheet](https://content.u-blox.com/sites/default/files/documents/NEO-F10T_DataSheet_UBX-22022576.pdf)
+    3.  [Hardware Integration Guide](https://content.u-blox.com/sites/default/files/documents/NEO-F10T_IntegrationManual_UBX-22018271.pdf)
+    4.  [Chip Product Page](https://www.u-blox.com/en/product/neo-f10t-module)
 
-            5.  [Chip Product Page](https://www.u-blox.com/en/product/neo-f10t-module)
+```
+2.  Make sure GPIO pins are FUCKING 2.54mm AND 3.3v OR 5v
+	1. use goldddd pinssss~
+3.  GPS cable
+	1.  check connectors
+	2.  check adaptors
+	3.  check variety
+		1.  speed/length
+		2.  check length
+4.  GPS antenna
+	1.  check protos
+	2.  check bands
+	3.  check features
+	4.  check connectors
+```
 
+## RPI5 Wiring
+
+- [GPIO Simple Pinout](https://vilros.com/pages/raspberry-pi-5-pinout)
+- [GPIO Detailed Pinout](https://pinout.xyz/pinout/3v3_power)
+
+### Wiring of Note
+
+- CLK/PCM/GPIO18/PIN12:
+    - CLK in/out up to 10mHz (1ns period)
+    - ![9824306b308e6d2d21274a5bfe933c6b.png](../../_resources/9824306b308e6d2d21274a5bfe933c6b.png)
+    - only one i2c port?
+    - mostly all 3v3?
+    - PCM is kinda like DAC?
+    - GPIO Read?
+    - PWM?
+    - find sum DAC/ADC? sumtin?
+    - **May have to nix double RTC Module**
+
+### Wiring
+
+- UART (GPS Module, tinker with speed)
+- I2C (RTC)
+- CLK/PCM/GPIO READ? (RTC 32khz pulse - 31.25us period)
 
 ## Operation Flow
 
-Both RTCs loaded time over I2C, both inputting 32kHz signal via GPIO
+Both RTCs loaded time over I2C, both inputting 32kHz (31.25us period) signal via GPIO
 
-Dual RTC time, GPS time, system time, GPS PPS, dual 32kHz signals, pulsar readings:
+RTC time, GPS time, system time, GPS PPS, 32kHz (31.25us period) signal, pulsar readings:
 
 - tested off each other
     - deltas per pulse (errors) (add to Grafana)
@@ -75,18 +114,14 @@ Dual RTC time, GPS time, system time, GPS PPS, dual 32kHz signals, pulsar readin
     - stored in histograms, constantly updating (add to Grafana)
         - dial in desired confidence interval over time (add to Grafana)
     - divisor/multiplier for 32kHz pulses to make them ONE BEAT constantly updated (displayed in Grafana)
-        - one 32kHz oscillator (the most reliable) will be dubbed the "master universal beat pulse", made into pulse by divisor/multiplier based on previous calculations
+        - 32kHz oscillator (31.25us period) (or most reliable) will be dubbed the "master universal beat pulse", made into pulse by divisor/multiplier based on previous calculations
         - and will serve as source of truth for UBT web display
 - sanity tested against network sources
 
 1.  Test both RTC times against GPS time
-    
 2.  Test system time against GPS time
-    
 3.  Test system time against network time
-    
 4.  Sanity Checks
-    
     1.  Time reported vs time actual (net)
     2.  Cable/system delay calculated vs delay measured
     3.  Readability check
@@ -97,8 +132,4 @@ Dual RTC time, GPS time, system time, GPS PPS, dual 32kHz signals, pulsar readin
 ## Maybe
 
 1.  Play with PPS (dial faster?)
-    
 2.  Play with UART speed (dial faster?)
-    
-
-