common.py

@@ -24,17 +24,17 @@ def read_register(spi, addr):
     READ_SINGLE = get_addr("READ_SINGLE")
     # Send address | 0x80 (read), then 0x00 dummy to clock in response
     response = spi.xfer2([READ_SINGLE | addr, 0x00])
-    sleep(0.1)
+    # sleep(0.1)
     return response[1]
 
-def spi_write_burst(spi, addr, data):
+def write_burst(spi, addr, data):
     """Write multiple bytes using burst write"""
     WRITE_BURST = get_addr("WRITE_BURST")
     tbuf = [addr | WRITE_BURST] + data
     spi.xfer2(tbuf)
     sleep(0.1)
 
-def spi_read_burst(spi, addr, length):
+def read_burst(spi, addr, length):
     """Read multiple bytes using burst read"""
     READ_BURST = get_addr("READ_BURST")
     rbuf = [addr | READ_BURST] + [0x00] * length

main.py

@@ -1,18 +1,16 @@
 import spidev
-from util import print_gdo_state, sleep, get_addr, dump_regs
+from util import print_gdo_state, sleep, get_addr, dump_regs, debug, GDO0_PIN, GDO2_PIN
-from receive import receive_packet
+from receive import rx_data_rf
 from common import reset, setup_spi, setup_gpio, read_register, test_read_write_reg, init_cc_2500, write_reg, SRES, SNOP, MARCSTATE, VERSION
 
-debug = True
+
-GDO0_PIN=17
-GDO2_PIN=27
 
 def menu():
     print("\nMenu")
     print("1: Read Reg by name")
     print("2: Write reg hex value by name")
     print("3: Dump registers")
-    print("4: Poll for packets")
+    print("4: rx_data_rf")
     print("5: Run Read+Write test")
     print("6: Print GDO state")
     print("0: Quit")
@@ -51,7 +49,8 @@ if __name__ == "__main__":
             elif cmd == 3:
                 dump_regs(spi, True)
             elif cmd == 4:
-                receive_packet(spi)
+                while(True):
+                    rx_data_rf(spi)
             elif cmd == 5:
                 res = test_read_write_reg(spi, True)
                 print("Test result : "+str(res))

receive.py

@@ -1,45 +1,87 @@
-from util import *
+from util import sleep, get_addr, digital_read, GDO0_PIN, GDO2_PIN, debug, delay
 import time
+from common import strobe, read_register
 
-def burst_read(spi, addr, length):
+SIDLE = get_addr('SIDLE')
-    """Read multiple bytes"""
+SFRX = get_addr('SFRX')
-    READ_SINGLE = get_addr("READ_SINGLE")
+SRX = get_addr('SRX')
-    READ_BURST = get_addr("READ_BURST")
+RXFIFO = get_addr('RXFIFO')
-    return spi.xfer2([addr | READ_SINGLE | READ_BURST] + [0x00] * length)
 
-
+def flush_rx(spi):
-
+    # Make sure that the radio is in IDLE state before flushing the FIFO
-def read_fifo(spi):
+    # (Unless RXOFF_MODE has been changed, the radio should be in IDLE state at this point)
-    # Burst read RX FIFO
+    delay(10)
-    READ_BURST = get_addr("READ_BURST")
+    strobe(spi, SIDLE)
-    RXFIFO = get_addr("RXFIFO")
+    delay(10)
-    fifo = spi.xfer2([RXFIFO | READ_BURST] + [0x00]*64)  # Max 64 bytes
-    return fifo[1:]
-
-
-def receive_packet(spi):
-    SFRX = get_addr("SFRX")
-    RXBYTES = get_addr("RXBYTES")
-    SRX = get_addr("SRX")
-    
     # Flush RX FIFO
     strobe(spi, SFRX)
-    time.sleep(0.5)  # 1 ms delay to allow flush
+    delay(10)
-    # Go into RX mode
-    strobe(spi, SRX) 
 
-    # Wait for data (use GDO0 in real app)
+def rx_data_rf(spi):
-    sleep(0.5)
+    strobe(spi, SRX)
+    gdo2_state = False
+    count = 0
+    while(gdo2_state == False):
+        gdo2_state = digital_read(GDO2_PIN)
+        delay(1)
+        count = count+1
+        if count > 1000:
+            flush_rx(spi)
+            print("ERR NO DATA")
+            return
+    while(gdo2_state == True):
+        gdo2_state = digital_read(GDO2_PIN)
+        delay(100)
+    packet_length: int = read_register(spi, RXFIFO)
+    print("Packet Length {0}".format(packet_length))
+    for i in range(packet_length):
+        print(f", byte: {0}: 0x{1}", i, read_register(spi, RXFIFO))
 
-    # Check RXBYTES
+    # Make sure that the radio is in IDLE state before flushing the FIFO
+    # (Unless RXOFF_MODE has been changed, the radio should be in IDLE state at this point)
+    strobe(spi, SIDLE)
+    # Flush RX FIFO
+    strobe(spi, SFRX)
+
+# def burst_read(spi, addr, length):
+#     """Read multiple bytes"""
+#     READ_SINGLE = get_addr("READ_SINGLE")
+#     READ_BURST = get_addr("READ_BURST")
+#     return spi.xfer2([addr | READ_SINGLE | READ_BURST] + [0x00] * length)
+
+
+
+# def read_fifo(spi):
+#     # Burst read RX FIFO
+#     READ_BURST = get_addr("READ_BURST")
+#     RXFIFO = get_addr("RXFIFO")
+#     fifo = spi.xfer2([RXFIFO | READ_BURST] + [0x00]*64)  # Max 64 bytes
+#     return fifo[1:]
+
+
+# def receive_packet(spi):
+#     SFRX = get_addr("SFRX")
+#     RXBYTES = get_addr("RXBYTES")
+#     SRX = get_addr("SRX")
     
-    timeout = time.time() + 2  # 2-second timeout
+#     # Flush RX FIFO
-    while time.time() < timeout:
+#     strobe(spi, SFRX)
-        rx_bytes = read_register(spi, RXBYTES) & 0x7F
+#     time.sleep(0.5)  # 1 ms delay to allow flush
-        if rx_bytes > 0:
+#     # Go into RX mode
-            data = read_fifo(spi)
+#     strobe(spi, SRX) 
-            print(f"Received: {data}")
-            return data
-        time.sleep(0.01)
 
-print("Timeout: no data received.")
+#     # Wait for data (use GDO0 in real app)
+#     sleep(0.5)
+
+#     # Check RXBYTES
+    
+#     timeout = time.time() + 2  # 2-second timeout
+#     while time.time() < timeout:
+#         rx_bytes = read_register(spi, RXBYTES) & 0x7F
+#         if rx_bytes > 0:
+#             data = read_fifo(spi)
+#             print(f"Received: {data}")
+#             return data
+#         time.sleep(0.01)
+
+# print("Timeout: no data received.")

util.py

@@ -1,6 +1,9 @@
 from regs_addr import regs_addr
 import RPi.GPIO as GPIO
 import time
+debug = True
+GDO0_PIN=17
+GDO2_PIN=27
 
 def rr(spi, addr):
     READ_SINGLE = get_addr("READ_SINGLE")
@@ -15,6 +18,16 @@ def print_gdo_state(GDO0_PIN=17, GDO2_PIN=27):
     print(f"GDO0 (GPIO{GDO0_PIN}): {gdo0}, GDO2 (GPIO{GDO2_PIN}): {gdo2}")
     sleep(0.1) 
 
+def digital_read(GDO_PIN: int):
+    bit = GPIO.input(GDO_PIN)
+    # print("bit " + str(bit))
+    if bit == 1:
+        return True
+    elif bit == 0:
+        return False
+    else:
+        raise Exception("Unexpected digital read GDO_PIN{GDO_PIN} {bit}")
+
 def get_addr(name):
     addr = ""
     stop = False
@@ -44,4 +57,12 @@ def dump_regs(spi, cfgonly = False):
 #     spi.xfer2([CONFIG_REGS["PKTCTRL0"], 0x01])
 
 def sleep(t):
-    return time.sleep(t)
+    return time.sleep(t)
+
+def delay(t):
+    """Delay for t milliseconds."""
+    time.sleep(t / 1000.0)
+
+def delayMicroseconds(t):
+    """Delay for t microseconds."""
+    time.sleep(t / 1_000_000.0)