drivers/nrf24l01: Make nRF24L01 test script more portable.

drivers/nrf24l01/nrf24l01test.py

@@ -1,8 +1,8 @@
 """Test for nrf24l01 module."""
 
 import struct
-import pyb
-from pyb import Pin, SPI
+import utime
+from machine import Pin, SPI
 from nrf24l01 import NRF24L01
 
 pipes = (b'\xf0\xf0\xf0\xf0\xe1', b'\xf0\xf0\xf0\xf0\xd2')
@@ -24,7 +24,7 @@ def master():
     while num_successes < num_needed and num_failures < num_needed:
         # stop listening and send packet
         nrf.stop_listening()
-        millis = pyb.millis()
+        millis = utime.ticks_ms()
         led_state = max(1, (led_state << 1) & 0x0f)
         print('sending:', millis, led_state)
         try:
@@ -36,10 +36,10 @@ def master():
         nrf.start_listening()
 
         # wait for response, with 250ms timeout
-        start_time = pyb.millis()
+        start_time = utime.ticks_ms()
         timeout = False
         while not nrf.any() and not timeout:
-            if pyb.elapsed_millis(start_time) > 250:
+            if utime.ticks_diff(utime.ticks_ms(), start_time) > 250:
                 timeout = True
 
         if timeout:
@@ -51,11 +51,11 @@ def master():
             got_millis, = struct.unpack('i', nrf.recv())
 
             # print response and round-trip delay
-            print('got response:', got_millis, '(delay', pyb.millis() - got_millis, 'ms)')
+            print('got response:', got_millis, '(delay', utime.ticks_diff(utime.ticks_ms(), got_millis), 'ms)')
             num_successes += 1
 
         # delay then loop
-        pyb.delay(250)
+        utime.sleep_ms(250)
 
     print('master finished sending; successes=%d, failures=%d' % (num_successes, num_failures))
 
@@ -69,18 +69,19 @@ def slave():
     print('NRF24L01 slave mode, waiting for packets... (ctrl-C to stop)')
 
     while True:
-        pyb.wfi()
+        machine.idle()
         if nrf.any():
             while nrf.any():
                 buf = nrf.recv()
                 millis, led_state = struct.unpack('ii', buf)
                 print('received:', millis, led_state)
-                for i in range(4):
-                    if led_state & (1 << i):
-                        pyb.LED(i + 1).on()
+                for led in leds:
+                    if led_state & 1:
+                        led.on()
                     else:
-                        pyb.LED(i + 1).off()
-                pyb.delay(15)
+                        led.off()
+                    led_state >>= 1
+                utime.sleep_ms(15)
 
             nrf.stop_listening()
             try:
@@ -90,6 +91,12 @@ def slave():
             print('sent response')
             nrf.start_listening()
 
+try:
+    import pyb
+    leds = [pyb.LED(i + 1) for i in range(4)]
+except:
+    leds = []
+
 print('NRF24L01 test module loaded')
 print('NRF24L01 pinout for test:')
 print('    CE on Y4')