Merge branch 'master' of https://gitea.cs.ru.is/RU-V207/rover-pi

lgpio/motor-test.py

@@ -0,0 +1,34 @@
+#!/usr/bin/python
+# This test assumes you are trying to control a motor through a DRV8833 motor
+# controller chip.  This general approach should work for other motors as well.
+import lgpio
+import time
+
+# pin assignments
+gpio_pwm = 18  #MOTA1
+gpio_reverse = 16 #MOTA2
+gpio_notsleep = 24 #MSLEEP
+# parameters
+pwm_freq = 1000
+
+
+h = lgpio.gpiochip_open(0)
+try:
+    lgpio.gpio_claim_output(h, gpio_reverse)
+    lgpio.gpio_claim_output(h, gpio_notsleep)
+    lgpio.gpio_write(h, gpio_reverse, 0)   # low on reverse pin to turn off h-bridge MOTA2
+    lgpio.gpio_write(h, gpio_notsleep, 1)   # high on /sleep to enable both h-bridges
+    
+    while True:
+        for pwm_level in range(0,100):
+            lgpio.tx_pwm(h, gpio_pwm, pwm_freq, pwm_level)
+            pwm_level += 10
+            time.sleep(0.05)
+        for pwm_level in range(100,0,-1):
+            lgpio.tx_pwm(h, gpio_pwm, pwm_freq, pwm_level)
+            pwm_level += 10
+            time.sleep(0.05)
+
+finally:
+    lgpio.gpio_write(h, gpio_notsleep, 1)   # high on /sleep to disable    
+    lgpio.gpiochip_close(h)          # Always close!

lgpio/pwm-test.py

@@ -5,21 +5,21 @@ import time
 
 # Open GPIO chip (0 = /dev/gpiochip0, on Pi 5 gpiochip4 also possible)
 h = lgpio.gpiochip_open(0)
-
+# Hardware PWM on GPIO18 (pin 12) must be PWM-capable
+pwm_pin = 18
+pwm_freq = 1000
 try:
-    lgpio.gpio_claim_output(h, 16)   # GPIO16 as output (MOTA2)
+    while True:
-    lgpio.gpio_write(h, 16, 0)   # LOW
+        for pwm_level in range(0,100):
+            lgpio.tx_pwm(h, pwm_pin, pwm_freq, pwm_level)
+            pwm_level += 10
+            time.sleep(0.05)
+        for pwm_level in range(100,0,-1):
+            lgpio.tx_pwm(h, pwm_pin, pwm_freq, pwm_level)
+            pwm_level += 10
+            time.sleep(0.05)
 
-    # Hardware PWM on GPIO18 (pin 12) must be PWM-capable
-    # Frequency: 1000 Hz, duty cycle: 50%
-    lgpio.tx_pwm(h, 18, 1000, 50)
-    time.sleep(2)
-
-    # Reduce duty cycle to 20%
-    lgpio.tx_pwm(h, 18, 1000, 20)
-    time.sleep(2)
-
-    lgpio.tx_pwm(h, 18, 0, 0)   # Stop PWM
             
 finally:
+    lgpio.tx_pwm(h, pwm_pin, 0, 0)   # Stop PWM
     lgpio.gpiochip_close(h)          # Always close!