README: Introduce Thermostat GUI

Co-authored-by: topquark12 <aw@m-labs.hk>

README.md

@@ -200,30 +200,31 @@ Testing heat flow direction with a low set current is recommended before install
 
 ### Limits
 
-Each channel has maximum value settings, for setting
+Each MAX1968 TEC driver has analog/PWM inputs for setting
 output limits.
 
-Use the `output` command to see them.
+Use the `output` command to see current settings and maximum values.
 
 | Limit       | Unit    | Description                   |
 | ---         | :---:   | ---                           |
 | `max_v`     | Volts   | Maximum voltage               |
 | `max_i_pos` | Amperes | Maximum positive current      |
 | `max_i_neg` | Amperes | Maximum negative current      |
+| `i_set`     | Amperes | (Not a limit; Open-loop mode) |
 
 Example: set the maximum voltage of channel 0 to 1.5 V.
 ```
 output 0 max_v 1.5
 ```
 
-Example: set the maximum negative current of channel 0 to -2 A.
+Example: set the maximum negative current of channel 0 to -3 A.
 ```
-output 0 max_i_neg 2
+output 0 max_i_neg 3
 ```
 
-Example: set the maximum positive current of channel 1 to 2 A.
+Example: set the maximum positive current of channel 1 to 3 A.
 ```
-output 1 max_i_pos 2
+output 0 max_i_pos 3
 ```
 
 ### Open-loop mode

pytec/plot.py

@@ -1,4 +1,3 @@
-import time
 import numpy as np
 import matplotlib.pyplot as plt
 import matplotlib.animation as animation
@@ -48,8 +47,7 @@ quit = False
 
 def recv_data(tec):
     global last_packet_time
-    while True:
-        data = tec.get_report()
+    for data in tec.report_mode():
         ch0 = data[0]
         series_lock.acquire()
         try:
@@ -63,7 +61,6 @@ def recv_data(tec):
 
         if quit:
             break
-        time.sleep(0.05)
 
 thread = Thread(target=recv_data, args=(tec,))
 thread.start()