From 8dac7f365648f878b6dddbc51193cb824394ba1b Mon Sep 17 00:00:00 2001
From: "Joseph T. Foley" <foley@ru.is>
Date: Sat, 4 Jul 2026 15:57:49 +0000
Subject: [PATCH] PWM sweep test working

---
 lgpio/pwm-test.py | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/lgpio/pwm-test.py b/lgpio/pwm-test.py
index e44f005..2f05f1d 100755
--- a/lgpio/pwm-test.py
+++ b/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)
-    lgpio.gpio_write(h, 16, 0)   # LOW
+    while True:
+        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!