add gptimer python

2019-05-27 10:24:43 +08:00
parent 9c4794c868
commit bb7e609665
1 changed files with 22 additions and 0 deletions
@@ -0,0 +1,22 @@
+CPU_FREQUENCY = 48e6
+
+
+def headstage_gptimer_get_frequency_load_value(frequency: float) -> int:
+    load = int(CPU_FREQUENCY / frequency) - 1
+
+    if load < 0xFFFF:
+        return load
+    else:
+        return 0xFA0000 | int(load / 250) - 1
+
+
+def headstage_gptimer_get_timeout_load_value(timeout_us: int) -> int:
+    load = int(timeout_us * CPU_FREQUENCY / 1e6) - 1
+
+    if load < 0xFFFF:
+        return load
+    else:
+        return 0xFA0000 | int(load / 250) - 1
+
+
+print('0x%06X' % headstage_gptimer_get_frequency_load_value(0.8))