Chapter 6 code

2022-01-28 21:10:14 +00:00
parent fd4b0cb544
commit 881355daaa
23 changed files with 723 additions and 33 deletions
@@ -0,0 +1,40 @@
+"""Shift and reverse"""
+import rp2pio
+import adafruit_pioasm
+import array
+
+
+program = """
+.program debug_register    
+    set y, 2       ; set a value in y
+
+
+; send it to be printed
+    mov isr, y
+    push noblock    ; and use PUSH to put it on the receive FIFO
+
+; shift and reverse
+    in y, 1         ; get bits
+    mov isr, :: isr ; reverse it
+
+; print again
+    push noblock    ; and use PUSH to put it on the receive FIFO
+"""
+
+assembled = adafruit_pioasm.assemble(program)
+
+## set up a statemachine
+sm = rp2pio.StateMachine(
+    assembled,
+    frequency=2000,
+)
+
+buffer = array.array('I', [0])
+
+# read the data
+sm.readinto(buffer)
+print("{0} 0b{0:032b} 0x{0:x}".format(buffer[0]))
+
+# read the data
+sm.readinto(buffer)
+print("{0} 0b{0:032b} 0x{0:x}".format(buffer[0]))