dev progess
This commit is contained in:
David Westgate
parent
a20dddb9d0
commit
21e95b8d3a
BIN
cc2500.pdf
Normal file
BIN
cc2500.pdf
Normal file
Binary file not shown.
17
cc2500_init.json
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17
cc2500_init.json
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{
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"IOCFG0" : { "hex":"0x2E", "dec":46},
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"FIFOTHR" : { "hex":"0x47", "dec":71},
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"PKTCTRL0": { "hex":"0x05", "dec":5},
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"FREQ2" : { "hex":"0x5D", "dec":93},
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"FREQ1" : { "hex":"0x93", "dec":147},
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"FREQ0" : { "hex":"0xB1", "dec":177},
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"MDMCFG4" : { "hex":"0x0D", "dec":13},
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"MDMCFG3" : { "hex":"0x3B", "dec":59},
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"MDMCFG2" : { "hex":"0x73", "dec":115},
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"DEVIATN" : { "hex":"0x01", "dec":1},
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"MCSM0" : { "hex":"0x18", "dec":24},
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"FSCAL3" : { "hex":"0xEA", "dec":234},
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"FSCAL1" : { "hex":"0x00", "dec":0},
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"TEST2" : { "hex":"0x00", "dec":0},
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"TEST1" : { "hex":"0x21", "dec":33}
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}
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97
cc2500_regs.json
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97
cc2500_regs.json
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{
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"CONFIG_REGS": {
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"IOCFG2": {"hex": "0x00", "dec": 0},
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"IOCFG1": {"hex": "0x01", "dec": 1},
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"IOCFG0": {"hex": "0x02", "dec": 2},
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"FIFOTHR": {"hex": "0x03", "dec": 3},
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"SYNC1": {"hex": "0x04", "dec": 4},
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"SYNC0": {"hex": "0x05", "dec": 5},
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"PKTLEN": {"hex": "0x06", "dec": 6},
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"PKTCTRL1": {"hex": "0x07", "dec": 7},
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"PKTCTRL0": {"hex": "0x08", "dec": 8},
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"ADDR": {"hex": "0x09", "dec": 9},
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"CHANNR": {"hex": "0x0A", "dec": 10},
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"FSCTRL1": {"hex": "0x0B", "dec": 11},
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"FSCTRL0": {"hex": "0x0C", "dec": 12},
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"FREQ2": {"hex": "0x0D", "dec": 13},
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"FREQ1": {"hex": "0x0E", "dec": 14},
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"FREQ0": {"hex": "0x0F", "dec": 15},
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"MDMCFG4": {"hex": "0x10", "dec": 16},
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"MDMCFG3": {"hex": "0x11", "dec": 17},
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"MDMCFG2": {"hex": "0x12", "dec": 18},
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"MDMCFG1": {"hex": "0x13", "dec": 19},
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"MDMCFG0": {"hex": "0x14", "dec": 20},
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"DEVIATN": {"hex": "0x15", "dec": 21},
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"MCSM2": {"hex": "0x16", "dec": 22},
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"MCSM1": {"hex": "0x17", "dec": 23},
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"MCSM0": {"hex": "0x18", "dec": 24},
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"FOCCFG": {"hex": "0x19", "dec": 25},
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"BSCFG": {"hex": "0x1A", "dec": 26},
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"AGCCTRL2": {"hex": "0x1B", "dec": 27},
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"AGCCTRL1": {"hex": "0x1C", "dec": 28},
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"AGCCTRL0": {"hex": "0x1D", "dec": 29},
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"WOREVT1": {"hex": "0x1E", "dec": 30},
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"WOREVT0": {"hex": "0x1F", "dec": 31},
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"WORCTRL": {"hex": "0x20", "dec": 32},
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"FREND1": {"hex": "0x21", "dec": 33},
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"FREND0": {"hex": "0x22", "dec": 34},
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"FSCAL3": {"hex": "0x23", "dec": 35},
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"FSCAL2": {"hex": "0x24", "dec": 36},
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"FSCAL1": {"hex": "0x25", "dec": 37},
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"FSCAL0": {"hex": "0x26", "dec": 38},
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"RCCTRL1": {"hex": "0x27", "dec": 39},
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"RCCTRL0": {"hex": "0x28", "dec": 40},
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"FSTEST": {"hex": "0x29", "dec": 41},
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"PTEST": {"hex": "0x2A", "dec": 42},
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"AGCTEST": {"hex": "0x2B", "dec": 43},
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"TEST2": {"hex": "0x2C", "dec": 44},
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"TEST1": {"hex": "0x2D", "dec": 45},
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"TEST0": {"hex": "0x2E", "dec": 46}
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},
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"STROBES": {
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"SRES": {"hex": "0x30", "dec": 48},
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"SFSTXON": {"hex": "0x31", "dec": 49},
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"SXOFF": {"hex": "0x32", "dec": 50},
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"SCAL": {"hex": "0x33", "dec": 51},
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"SRX": {"hex": "0x34", "dec": 52},
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"STX": {"hex": "0x35", "dec": 53},
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"SIDLE": {"hex": "0x36", "dec": 54},
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"SAFC": {"hex": "0x37", "dec": 55},
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"SWOR": {"hex": "0x38", "dec": 56},
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"SPWD": {"hex": "0x39", "dec": 57},
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"SFRX": {"hex": "0x3A", "dec": 58},
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"SFTX": {"hex": "0x3B", "dec": 59},
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"SWORRST": {"hex": "0x3C", "dec": 60},
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"SNOP": {"hex": "0x3D", "dec": 61}
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},
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"STATUS": {
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"PARTNUM": {"hex": "0x30", "dec": 48},
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"VERSION": {"hex": "0x31", "dec": 49},
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"FREQEST": {"hex": "0x32", "dec": 50},
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"LQI": {"hex": "0x33", "dec": 51},
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"RSSI": {"hex": "0x34", "dec": 52},
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"MARCSTATE": {"hex": "0x35", "dec": 53},
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"WORTIME1": {"hex": "0x36", "dec": 54},
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"WORTIME0": {"hex": "0x37", "dec": 55},
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"PKTSTATUS": {"hex": "0x38", "dec": 56},
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"VCO_VC_DAC": {"hex": "0x39", "dec": 57},
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"TXBYTES": {"hex": "0x3A", "dec": 58},
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"RXBYTES": {"hex": "0x3B", "dec": 59},
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"NUM_RXBYTES": {"hex": "0x7F", "dec": 127}
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},
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"MEMORY": {
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"PATABLE": {"hex": "0x3E", "dec": 62},
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"TXFIFO": {"hex": "0x3F", "dec": 63},
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"RXFIFO": {"hex": "0x3F", "dec": 63}
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},
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"MASKS": {
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"LQI_RX": {"hex": "0x01", "dec": 1},
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"CRC_OK": {"hex": "0x80", "dec": 128}
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},
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"ACCESS": {
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"WRITE_BURST": {"hex": "0x40", "dec": 64},
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"READ_SINGLE": {"hex": "0x80", "dec": 128},
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"READ_BURST": {"hex": "0xC0", "dec": 192}
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}
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}
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12
freq.txt
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12
freq.txt
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Handheld Init
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2.4312 GHZ (mid)
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2.439 (strong)
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2.447 GHZ (strong)
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2.4632 GHZ (strong)
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2.471 GHZ (weak)
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Test Pts
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2410000.000
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2430000.000
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2450000.000
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2470000.000
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166
read.py
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166
read.py
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import spidev
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import time
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import json
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# Example register to read (e.g., version)
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VERSION_REG = 0xF1 # CC2500 version register (0xF1 is 0x31 | 0xC0 for read + burst)
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# Initialize SPI
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global spi
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global init_data
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# global regs_data
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global CONFIG_REGS
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global STROBES
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global STATUS
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global MEMORY
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global MASKS
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global ACCESS
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def asb (a):
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return int(b,16)
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def strobe(command):
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"""Send a command strobe to CC2500"""
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spi.xfer2([command])
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def write_reg(addr, value):
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"""Write single byte to a register"""
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spi.xfer2([addr, value])
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def burst_write(addr, data):
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"""Write multiple bytes to FIFO or registers"""
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BURST = 0x40
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spi.xfer2([addr | BURST] + data)
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def burst_read(addr, length):
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"""Read multiple bytes"""
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READ_SINGLE = ACCESS["READ_SINGLE"]["dec"]
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READ_BURST = ACCESS["READ_BURST"]["dec"]
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return spi.xfer2([addr | READ_SINGLE | READ_BURST] + [0x00] * length)
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def read_register(addr):
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READ_SINGLE = ACCESS["READ_SINGLE"]["dec"]
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# Send address | 0x80 (read), then 0x00 dummy to clock in response
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response = spi.xfer2([READ_SINGLE | addr, 0x00])
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return response[1]
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def init_cc2500():
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spi.open(0, 0) # Bus 0, CE0 (Pin 24)
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spi.max_speed_hz = 500000 # Safe start speed
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spi.mode = 0b00 # SPI mode 0
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print("Sending SRES (reset)...")
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spi.xfer2([SRES])
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time.sleep(0.1)
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print("Sending SNOP (no-op)...")
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status = spi.xfer2([SNOP])[0]
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print(f"Status byte: 0x{status:02X}")
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print("Reading VERSION register...")
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version = read_register(0x31)
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print(f"CC2500 VERSION register: 0x{version:02X}")
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spi.close()
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def send_packet(data):
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# Flush TX FIFO
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strobe(0x3B) # SFTX
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# Load data to TX FIFO (fixed length)
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burst_write(0x3F, data) # 0x3F = TX FIFO
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# Strobe STX to transmit
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strobe(0x35) # STX
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print(f"Sent: {data}")
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def receive_packet():
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# Flush RX FIFO
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SFRX = STROBES["SFRX"]["dec"]
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strobe(SFRX) # SFRX
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SRX = STROBES["SRX"]["dec"]
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# Go into RX mode
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strobe(SRX) # SRX
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# Wait for data (use GDO0 in real app)
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time.sleep(0.1)
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# Check RXBYTES
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RXBYTES = STATUS["RXBYTES"]["dec"]
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rx_bytes = read_register(RXBYTES) & 0x7F
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if rx_bytes == 0:
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print("No data received.")
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return None
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# Read data
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data = burst_read(0x3F, rx_bytes) # 0x3F = RX FIFO
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print(f"Received: {data}")
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return data
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def test_read_write_reg():
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# FIFOTHR = CONFIG_REGS["FIFOTHR"]["dec"]
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FIFOTHR = 0x03
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print("reg ", hex(FIFOTHR))
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initial_val = read_register(FIFOTHR)
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test_value = initial_val + 1
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write_reg(FIFOTHR, test_value)
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check = read_register(FIFOTHR)
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write_reg(FIFOTHR, initial_val)
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print("initial value ", initial_val)
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print("test value ", test_value)
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print("check ",check)
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return check == test_value
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if __name__ == "__main__":
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spi = spidev.SpiDev()
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spi.open(0, 0) # Bus 0, CE0 (Pin 24)
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spi.max_speed_hz = 2000000 # Safe start speed
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spi.mode = 0b00 # SPI mode 0
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with open("cc2500_init.json", "r") as f:
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init_data = json.load(f)
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with open("cc2500_regs.json", "r") as f:
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regs_data = json.load(f)
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CONFIG_REGS = regs_data["CONFIG_REGS"]
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STROBES = regs_data["STROBES"]
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STATUS = regs_data["STATUS"]
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MEMORY = regs_data["MEMORY"]
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MASKS = regs_data["MASKS"]
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ACCESS = regs_data["ACCESS"]
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SRES = STROBES["SRES"]["dec"]
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SNOP = STROBES["SNOP"]["dec"]
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VERSION = STATUS["VERSION"]["dec"]
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print("Sending SRES (reset)...")
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spi.xfer2([SRES])
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time.sleep(0.1)
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print("Sending SNOP (no-op)...")
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status = spi.xfer2([SNOP])[0]
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print(f"Status byte: 0x{status:02X}")
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print("Reading VERSION register...")
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version = read_register(0x31)
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print(f"CC2500 VERSION register: 0x{version:02X}")
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for reg_name, values in init_data.items():
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addr_dec = regs_data["CONFIG_REGS"][reg_name]["dec"]
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addr_hex = regs_data["CONFIG_REGS"][reg_name]["dec"]
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value_hex = values["hex"]
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value_dec = values["dec"]
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# print(addr)
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# print(values["hex"])
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# print("writing "+str(addr_hex) + " to "+str(addr_dec))
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write_reg(addr_dec, value_dec)
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print("Read + Write test ", test_read_write_reg())
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while True:
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receive_packet()
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time.sleep(1)
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spi.close()
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50
test.py
Executable file
50
test.py
Executable file
@ -0,0 +1,50 @@
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import spidev
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import time
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cc2500_config = {
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0x00: 0x0B, # IOCFG2
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0x02: 0x06, # IOCFG0
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0x03: 0x00, # FIFOTHR
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0x07: 0x08, # FSCTRL1
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0x08: 0x00, # FSCTRL0
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0x0B: 0x06, # IOCFG0 (repeating correct setting)
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0x0C: 0x00, # FIFOTHR
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0x0D: 0x5D, # FREQ2
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0x0E: 0x93, # FREQ1
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0x0F: 0xB1, # FREQ0
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0x10: 0x2D, # MDMCFG4
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0x11: 0x3B, # MDMCFG3
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0x12: 0x73, # MDMCFG2
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0x15: 0x00, # DEVIATN
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0x18: 0x18, # MCSM0
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0x19: 0x1D, # FOCCFG
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0x1A: 0x1C, # BSCFG
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0x1B: 0xC7, # AGCCTRL2
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0x22: 0x11, # FREND0
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0x23: 0xE9, # FSCAL3
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0x24: 0x2A, # FSCAL2
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0x25: 0x00, # FSCAL1
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0x26: 0x1F, # FSCAL0
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0x2C: 0x81, # TEST2
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0x2D: 0x35, # TEST1
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0x2E: 0x09, # TEST0
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0x06: 0x00, # ADDR (only once)
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0x1E: 0x05, # PKTCTRL0
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0x07: 0x00, # CHANNR
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}
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|
|
||||||
|
spi = spidev.SpiDev()
|
||||||
|
spi.open(0, 0) # Bus 0, CE0
|
||||||
|
spi.max_speed_hz = 500000 # Adjust if needed
|
||||||
|
spi.mode = 0 # CC2500 usually works in SPI mode 0
|
||||||
|
|
||||||
|
def cc2500_strobe(command):
|
||||||
|
resp = spi.xfer2([command])
|
||||||
|
return resp[0]
|
||||||
|
|
||||||
|
SRES = 0x30 # Reset strobe command
|
||||||
|
|
||||||
|
print("Sending reset to CC2500...")
|
||||||
|
status = cc2500_strobe(SRES)
|
||||||
|
print(f"Status byte: 0x{status:02X}")
|
||||||
31
wiring.txt
Normal file
31
wiring.txt
Normal file
@ -0,0 +1,31 @@
|
|||||||
|
CC2500 Pins to Raspberry Pi GPIO Pins
|
||||||
|
GND (CC2500) → Ground (Pin 6 on Raspberry Pi GPIO header)
|
||||||
|
|
||||||
|
VCC (CC2500) → 3.3V Power (Pin 1 or Pin 17 on Raspberry Pi GPIO header)
|
||||||
|
|
||||||
|
Ensure the CC2500 module operates at 3.3V. Connecting it to 5V may damage it.
|
||||||
|
|
||||||
|
SPI Pins:
|
||||||
|
SI (CC2500) → MOSI (GPIO 10) (Pin 19 on Raspberry Pi GPIO header)
|
||||||
|
|
||||||
|
SCK (CC2500) → SCLK (GPIO 11) (Pin 23 on Raspberry Pi GPIO header)
|
||||||
|
|
||||||
|
CSN (CC2500) → CE0 (GPIO 8) (Pin 24 on Raspberry Pi GPIO header)
|
||||||
|
|
||||||
|
This is the Chip Select line.
|
||||||
|
|
||||||
|
SO (CC2500) → MISO (GPIO 9) (Pin 21 on Raspberry Pi GPIO header)
|
||||||
|
|
||||||
|
Optional Pins:
|
||||||
|
GDO0 (CC2500) → Any GPIO Pin (e.g., GPIO 18) (Pin 12 on Raspberry Pi GPIO header)
|
||||||
|
|
||||||
|
Use this for interrupt handling or data-ready signals if required.
|
||||||
|
|
||||||
|
GDO2 (CC2500) → Any GPIO Pin (e.g., GPIO 25) (Pin 22 on Raspberry Pi GPIO header)
|
||||||
|
|
||||||
|
Additional interrupt or data pin.
|
||||||
|
|
||||||
|
Power Amplifier Pins (If Applicable):
|
||||||
|
PA_EN (CC2500) → Any GPIO Pin (Optional, depending on whether you control the amplifier externally or not).
|
||||||
|
|
||||||
|
PA_EX (CC2500) → Not Connected (unless needed for a specific configuration)
|
||||||
Loading…
Reference in New Issue
Block a user