那怎么实现通过nrf让openMV无线通信嘞,还是只能用它配套的无线WiFi模块?
2f4h 发布的帖子
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RE: 如何利用NRF24L01实现OPENMV4与主控STM32F1系列单片机的无线通信?
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如何利用NRF24L01实现OPENMV4与主控STM32F1系列单片机的无线通信?
-- coding: UTF-8 --
import time
import RPi.GPIO as GPIO
#一下试一下nrf24l01的C语言宏定义
TX_ADR_WIDTH = 5 # 5 uints TX address width
RX_ADR_WIDTH = 5 # 5 uints RX address width
TX_PLOAD_WIDTH = 32 # 20 uints TX payload
RX_PLOAD_WIDTH = 32 # 20 uints TX payloadTX_ADDRESS = [0x34,0x43,0x10,0x10,0x01] #本地地址
RX_ADDRESS = [0x34,0x43,0x10,0x10,0x01] #接收地址
READ_REG = 0x00 # 读寄存器指令
WRITE_REG = 0x20 # 写寄存器指令
RD_RX_PLOAD = 0x61 # 读取接收数据指令
WR_TX_PLOAD = 0xA0 # 写待发数据指令
FLUSH_TX = 0xE1 # 冲洗发送 FIFO指令
FLUSH_RX = 0xE2 # 冲洗接收 FIFO指令
REUSE_TX_PL = 0xE3 # 定义重复装载数据指令
NOP = 0xFF # 保留
#SPI(nRF24L01)寄存器地址***************
CONFIG = 0x00 # 配置收发状态,CRC校验模式以及收发状态响应方式
EN_AA = 0x01 # 自动应答功能设置
EN_RXADDR = 0x02 # 可用信道设置
SETUP_AW = 0x03 # 收发地址宽度设置
SETUP_RETR = 0x04 # 自动重发功能设置
RF_CH = 0x05 # 工作频率设置
RF_SETUP = 0x06 # 发射速率、功耗功能设置
STATUS = 0x07 # 状态寄存器
OBSERVE_TX = 0x08 # 发送监测功能
CD = 0x09 # 地址检测
RX_ADDR_P0 = 0x0A # 频道0接收数据地址
RX_ADDR_P1 = 0x0B # 频道1接收数据地址
RX_ADDR_P2 = 0x0C # 频道2接收数据地址
RX_ADDR_P3 = 0x0D # 频道3接收数据地址
RX_ADDR_P4 = 0x0E # 频道4接收数据地址
RX_ADDR_P5 = 0x0F # 频道5接收数据地址
TX_ADDR = 0x10 # 发送地址寄存器
RX_PW_P0 = 0x11 # 接收频道0接收数据长度
RX_PW_P1 = 0x12 # 接收频道0接收数据长度
RX_PW_P2 = 0x13 # 接收频道0接收数据长度
RX_PW_P3 = 0x14 # 接收频道0接收数据长度
RX_PW_P4 = 0x15 # 接收频道0接收数据长度
RX_PW_P5 = 0x16 # 接收频道0接收数据长度
FIFO_STATUS = 0x17 # FIFO栈入栈出状态寄存器设置TX_OK = 0x20 #TX发送完成中断
MAX_TX = 0x10 #达到最大发送次数中断#sta = 0
#RX_DR = 0
#树莓派各个引脚的定义
MOSI = 29
CSN = 31
MISO = 33
SCK = 35
CE = 37
IRQ = 32
def GPIO_Init():
GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(False)
Pinlist = [29,31,35,37,11]
GPIO.setup(Pinlist, GPIO.OUT)
Pinlist_Input = [33,32]
GPIO.setup(Pinlist_Input, GPIO.IN)
return 0def LEDH():
GPIO.output(11, GPIO.HIGH)def LEDL():
GPIO.output(11, GPIO.LOW)#****************************************************************************************************
#函数:uint SPI_RW(uint dat)
#功能:NRF24L01的SPI写时序
#**************************************************************************************************
def SPI_RW(dat):
bit_ctr = 8
_MOSI = 0
while(bit_ctr):bit_ctr = bit_ctr - 1 _MOSI = dat & 0x80 #output 'dat', MSB to MOSI if(_MOSI): GPIO.output(MOSI, GPIO.HIGH) else: GPIO.output(MOSI, GPIO.LOW) dat = (dat << 1) #shift next bit into MSB.. GPIO.output(SCK, GPIO.HIGH) #Set SCK GPIO.high.. dat |= GPIO.input(MISO) #capture current MISO bit GPIO.output(SCK, GPIO.LOW) #..then set SCK GPIO.low again return dat #return read dat
#****************************************************************************************************
#函数:uchar SPI_Read(uchar reg)
#功能:NRF24L01的SPI读时序
#***************************************************************************************************
def SPI_Read(reg):
reg_val = 0
GPIO.output(CSN, GPIO.LOW) #CSN GPIO.low, initialize SPI communication...
SPI_RW(reg) #Select register to read from..
reg_val = SPI_RW(0) #..then read registervalue
GPIO.output(CSN, GPIO.HIGH) #CSN GPIO.high, terminate SPI communication
return reg_val #return register value#*#
#功能:NRF24L01读写寄存器函数
##
def SPI_RW_Reg(reg,value):
status = 0
GPIO.output(CSN, GPIO.LOW) #CSN GPIO.low, init SPI transaction
status = SPI_RW(reg) #select register
SPI_RW(value) #..and write value to it..
GPIO.output(CSN, GPIO.HIGH) #CSN GPIO.high again
return status #return nRF24L01 status uchar#***#
#函数:uint SPI_Read_Buf(uchar reg, uchar pBuf, uchar uchars)
#功能: 用于读数据,reg:为寄存器地址,pBuf:为待读出数据地址,uchars:读出数据的个数
##
def SPI_Read_Buf(reg, pBuf, uchars):
status = 0
uchar_ctr = 0
GPIO.output(CSN, GPIO.LOW) # Set CSN GPIO.low, init SPI tranaction
status = SPI_RW(reg) # Select register to write to and read status uchar
while(uchar_ctr < uchars):
pBuf[uchar_ctr] = SPI_RW(0) #
uchar_ctr = uchar_ctr + 1
GPIO.output(CSN, GPIO.HIGH)
return(status) #return nRF24L01 status uchar#*********************************************************************************************************
#函数:uint SPI_Write_Buf(uchar reg, uchar pBuf, uchar uchars)
#功能: 用于写数据:为寄存器地址,pBuf:为待写入数据地址,uchars:写入数据的个数
#******************************************************************************************************#
def SPI_Write_Buf(reg, pBuf, uchars):
status = 0
uchar_ctr = 0
GPIO.output(CSN, GPIO.LOW) #SPI使能
status = SPI_RW(reg)
while(uchar_ctr < uchars): #
SPI_RW(pBuf[uchar_ctr])
uchar_ctr = uchar_ctr + 1
GPIO.output(CSN, GPIO.HIGH) #关闭SPI
return(status)#**#
#函数:void SetRX_Mode(void)
#功能:数据接收配置
##
def SetRX_Mode():
GPIO.output(CE, GPIO.LOW)
SPI_RW_Reg(WRITE_REG + CONFIG, 0x0f) # IRQ收发完成中断响应,16位CRC ,主接收
GPIO.output(CE, GPIO.HIGH)#*#
#函数:unsigned char nRF24L01_RxPacket(unsigned char rx_buf)
#功能:数据读取后放如rx_buf接收缓冲区中
##
def nRF24L01_RxPacket(rx_buf):revale = 0 sta = 0 RX_DR = 0 sta = SPI_Read(STATUS) # 读取状态寄存其来判断数据接收状况 RX_DR = sta&0x40 if(RX_DR): # 判断是否接收到数据 GPIO.output(CE, GPIO.LOW) #SPI使能 SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH) # read receive payload from RX_FIFO buffer revale =1 #读取数据完成标志 SPI_RW_Reg(WRITE_REG+STATUS,sta) #接收到数据后RX_DR,TX_DS,MAX_PT都置高为1,通过写1来清楚中断标志 return revale
#***********************************************************************************************************
#函数:void nRF24L01_TxPacket(unsigned char * tx_buf)
#功能:发送 tx_buf中数据
#********************************************************************************************************#
def nRF24L01_TxPacket(tx_buf):
sta = 0
GPIO.output(CE, GPIO.LOW)
SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e)
GPIO.output(CE, GPIO.HIGH)
time.sleep(0.00001)
GPIO.output(CE, GPIO.LOW) #StandBy I模式
SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH) # 装载数据
GPIO.output(CE, GPIO.HIGH) #置高CE,激发数据发送
# while(GPIO.input(IRQ)!=0) #等待发送完成
sta=SPI_Read(STATUS)
if(sta & MAX_TX): #达到最大重发次数
SPI_RW_Reg(FLUSH_TX,0xff) #清除TX FIFO寄存器
return MAX_TXif(sta&TX_OK): #发送完成 return 0 return 0xff #其他原因发送失败
#****************************************************************************************
#NRF24L01初始化
#**************************************************************************************#
def Init_NRF24L01():
GPIO.output(CE, GPIO.LOW) # chip enable
GPIO.output(CSN, GPIO.HIGH) # Spi disable
GPIO.output(SCK, GPIO.LOW) # Spi clock line init GPIO.high
SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH) # 写本地地址
SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH) # 写接收端地址
SPI_RW_Reg(WRITE_REG + EN_AA, 0x01) # 频道0自动 ACK应答允许
SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01) # 允许接收地址只有频道0,如果需要多频道可以参考Page21
SPI_RW_Reg(WRITE_REG + RF_CH, 40) # 设置信道工作为2.4GHZ,收发必须一致
SPI_RW_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH) #设置接收数据长度,本次设置为32字节
SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x0f) #设置发射速率为1MHZ,发射功率为最大值0dB
return 0if name == "main":
TxBuf = [1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0]
RxBuf = [0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0]
GPIO_Init()
Init_NRF24L01()
SetRX_Mode()
while True:
if nRF24L01_RxPacket(RxBuf):
if RxBuf[0]:
print(RxBuf)
LEDH()
SetRX_Mode()
time.sleep(1)
LEDL()
time.sleep(1)这套PYTHON的NRF24L01程序可以用在OPENMV上么?
这是树莓派的一套程序。