完善资料让更多小伙伴认识你，还能领取20积分哦， 立即完善>
3天内不再提示
|
用的是AVR ATmega328P的单片机，现在的问题是发送端的STATUS寄存器读到的始终是0x0e,没有进行check，只是不断循环发送。
下面贴一下程序：（程序里有一些地方用到transmitByte(）这个方法只是把单片机中的数据通过USART连接传到PC，与模块无关） //nrf24l01.h 发送端和接收端相同 #ifndef _NRF24L01_H #define _NRF24L01_H #include #include #define uchar unsigned char #define uint unsigned int //spi symbol #define DDR_SPI DDRB #define DD_MOSI DDB3 #define DD_MISO DDB4 #define DD_SCK DDB5 #define DD_SS DDB2 #define CE PINB1 #define IRQ PIND2 #define MISO PINB4 #define High_24L01_MISO PORTB |= (1 << PINB4) #define Low_24L01_MISO PORTB &= ~(1 << PINB4) #define Read_24L01_MISO PINB & (1 << PINB4) #define High_24L01_MOSI PORTB |= (1 << PINB3) #define Low_24L01_MOSI PORTB &= ~(1 << PINB3) #define Read_24L01_MOSI PINB & (1 << PINB3) #define High_24L01_SCK PORTB |= (1 << PINB5) #define Low_24L01_SCK PORTB &= ~(1 << PINB5) #define Read_24L01_SCK PINB & (1 << PINB5) #define Low_24L01_CSN PORTB &= ~(1 << PINB2) #define High_24L01_CSN PORTB |= (1 << PINB2) #define High_24L01_CE PORTB |= (1 << PINB1) #define Low_24L01_CE PORTB &= ~(1 << PINB1) #define Read_24L01_CE PINB & (1 << PINB1) //*******************************new #define High_24L01_IRQ PORTD |= (1 << PIND2) #define Low_24L01_IRQ PORTD &= ~(1 << PIND2) //*********************************************NRF24L01 #define TX_ADR_WIDTH 5 #define RX_ADR_WIDTH 5 #define TX_PLOAD_WIDTH 5 #define RX_PLOAD_WIDTH 5 //*************************************REGISTER INSTRUCtiON #define READ_REG 0x00 #define WRITE_REG 0x20 #define RD_RX_PLOAD 0x61 #define WR_TX_PLOAD 0xA0 #define FLUSH_TX 0xE1 #define FLUSH_RX 0xE2 #define REUSE_TX_PL 0xE3 #define NOP1 0xFF //*******************************REGISTER ADDRESS #define CONFIG 0x00 #define EN_AA 0x01 #define EN_RXADDR 0x02 #define SETUP_AW 0x03 #define SETUP_RETR 0x04 #define RF_CH 0x05 #define RF_SETUP 0x06 #define STATUS 0x07 #define OBSERVE_TX 0x08 #define CD 0x09 #define RX_ADDR_P0 0x0A #define RX_ADDR_P1 0x0B #define RX_ADDR_P2 0x0C #define RX_ADDR_P3 0x0D #define RX_ADDR_P4 0x0E #define RX_ADDR_P5 0x0F #define TX_ADDR 0x10 #define RX_PW_P0 0x11 #define RX_PW_P1 0x12 #define RX_PW_P2 0x13 #define RX_PW_P3 0x14 #define RX_PW_P4 0x15 #define RX_PW_P5 0x16 #define FIFO_STATUS 0x17 //***************************************************function void spi_init(void); void delay_nus(uint n); void delay_nms(uint n); uchar SPI_RW(uchar date); uchar SPI_Read(uchar reg); uchar SPI_RW_Reg(uchar reg, uchar value); uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar bites); uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar bites); void SetRX_Mode(void); uchar nRF24L01_RxPacket(uchar* rx_buf); void nRF24L01_TxPacket(uchar* tx_buf); uchar CheckACK(void); void init_NRF24L01(void); //new functions to output to hyperterminal uchar print_register_hyperterminal(uchar reg); void print_rw_address(uchar reg); uchar print_register_state(uchar state); #endif //nrf24l01.c 发送端和接收端相同 #include "nrf24l01.h" uchar TX_ADDRESS[TX_ADR_WIDTH]={0xE7,0xE7,0xE7,0xE7,0xE7}; uchar RX_ADDRESS[RX_ADR_WIDTH]={0xE7,0xE7,0xE7,0xE7,0xE7}; void spi_init(void) { High_24L01_CSN;//set CSN to high(not active) DDR_SPI = (1< } void delay_nus(uint n) { while(n--) ; } void delay_nms(uint n) { uint j; while(n--) for(j=0;j<1140;j++); } //***************************************SPI read and write uchar SPI_RW(uchar date) { SPDR=date; while(!(SPSR&(1< } //*********************************** read nRF24L01 register uchar SPI_Read(uchar reg) { uchar reg_val; Low_24L01_CSN; SPI_RW(reg); reg_val = SPI_RW(0xff); High_24L01_CSN; return(reg_val); } //************************************** write nRF24L01 register uchar SPI_RW_Reg(uchar reg, uchar value) { uchar status; Low_24L01_CSN; status = SPI_RW(reg); SPI_RW(value); High_24L01_CSN; return(status); } //******************************************read RX-fifo buffer or register with 5 bytes uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar bites) { uint status1,uchar_ctr; Low_24L01_CSN; status1 = SPI_RW(reg); for(uchar_ctr=0;uchar_ctr High_24L01_CSN; return(status1); } //**************************************write TX-FIFO buffer uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar bites) { uchar status1,uchar_ctr; Low_24L01_CSN; //SPI enable status1 = SPI_RW(reg); for(uchar_ctr=0; uchar_ctr High_24L01_CSN; //SPI disable return(status1); // } //****************************** set to RX mode void SetRX_Mode(void) { Low_24L01_CE; SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, RX_ADDRESS, RX_ADR_WIDTH); //set rx address SPI_RW_Reg(WRITE_REG + EN_AA, 0x00); //pipe0 automatical acknowledge SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); //enable pipe 0 //SPI_RW_Reg(WRITE_REG + SETUP_AW, 0x02); SPI_RW_Reg(WRITE_REG + RF_CH, 0x70); //set channel SPI_RW_Reg(WRITE_REG + RX_PW_P0, RX_PLOAD_WIDTH); //set payload width of the rx pipe0 SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x01); //-18dBm 1M SPI_RW_Reg(WRITE_REG + CONFIG, 0x0f); //set to rx mode High_24L01_CE; //start monitor delay_nus(200); //delay } //********************************** receive packet uchar nRF24L01_RxPacket(uchar* rx_buf) { uchar sta,flag=0; sta=SPI_Read(STATUS); //read STATUS register if(sta&0x40) //judge RX_DR==1? { Low_24L01_CE; //start to monitor SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH); //read data from RX_FIFO buffer flag = 1; //end flag of receving data } SPI_RW_Reg(WRITE_REG+STATUS,sta); //set RX_DR,TX_DS,MAX_PT to 1，to erase interruption flag //SPI_RW_Reg(WRITE_REG+STATUS,0xFF); return (flag); } //********************************* send packets void nRF24L01_TxPacket(uchar* tx_buf) { uchar sta=0; uchar flag=0; Low_24L01_CE; //start to write register SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); //set rx address for pipe0 for receiving acknowledge SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH); //tx_payload operation to send data SPI_RW_Reg(WRITE_REG + EN_AA, 0x00); // SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); // //SPI_RW_Reg(WRITE_REG + SETUP_AW, 0x02); SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0x03); //500+86us SPI_RW_Reg(WRITE_REG + RF_CH, 0x70); // SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x01); //-18dBm, 1Mbps SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); //set to transmitter delay_nms(2); High_24L01_CE; //start to send delay_nus(15); //delay_nus(10); Low_24L01_CE; } uchar CheckACK(void) { uchar sta1; sta1=SPI_Read(STATUS); //return STATUS register delay_nms(500); if((sta1&0x20)||(sta1&0x10)) //if tx_ds or max_rt set { //Low_24L01_CSN; SPI_RW_Reg((READ_REG+STATUS),0xff); //flush TX_DS and MAX_RT Low_24L01_CSN; SPI_RW(FLUSH_TX); //flush TX-FIFO High_24L01_CSN; return(0); } else return(1); } void init_NRF24L01(void) { uart0_init(); spi_init(); Low_24L01_CE; //standby mode Low_24L01_CSN; SPI_RW(FLUSH_TX); SPI_RW(FLUSH_RX); High_24L01_CSN; //disable SPI Low_24L01_SCK; //disable clock High_24L01_IRQ; } //下面的3个方法是自己写的，目的是把从寄存器里读出来的状态字可以通过usart通信在终端程序上面显示出来，与主题关联不大！！ //*******************************add a new function to output the state of a register on the hyperterminal uchar print_register_state(uchar state){ if(state&0x01){ transmitByte('0'); delay_nms(100); } else{ transmitByte('N'); delay_nms(100); } if(state&0x02){ transmitByte('1'); delay_nms(100); } else{ transmitByte('N'); delay_nms(100); } if(state&0x04){ transmitByte('2'); delay_nms(100); } else{ transmitByte('N'); delay_nms(100); } if(state&0x08){ transmitByte('3'); delay_nms(100); } else{ transmitByte('N'); delay_nms(100); } if(state&0x10){ transmitByte('4'); delay_nms(100); } else{ transmitByte('N'); delay_nms(100); } if(state&0x20){ transmitByte('5'); delay_nms(100); } else{ transmitByte('N'); delay_nms(100); } if(state&0x40){ transmitByte('6'); delay_nms(100); } else{ transmitByte('N'); delay_nms(100); } if(state&0x80){ transmitByte('7'); delay_nms(100); } else{ transmitByte('N'); delay_nms(100); } transmitByte(0x0d); delay_nms(100); transmitByte(0x0a); delay_nms(100); //return reg_content; } //**********************get the state of rx_addr or tx_addr register (5 bytes) void print_rw_address(uchar reg){ uchar rw_address[TX_PLOAD_WIDTH]; SPI_Read_Buf(reg, rw_address, TX_PLOAD_WIDTH); for(int i=0; i } } //*****************************get the state of registers (1 byte) uchar print_register_hyperterminal(uchar reg){ uchar reg_content=SPI_Read(reg); print_register_state(reg_content); return reg_content; } //接收端的主程序 #define F_CPU 3686400UL //To make the delay function work correctly //#define F_CPU 8000000UL #include #include "nrf24l01.h" int main(void){ uchar sta1,sta2; uchar RX_BUF[5]; uchar flag=0; while(!flag){ init_NRF24L01(); SetRX_Mode(); delay_nms(500); print_register_hyperterminal(CD); //******************************* High_24L01_CE; //start monitor delay_nus(200); //delay //********************************* sta1=print_register_hyperterminal(STATUS); TX_NEWLINE; if(sta1&0x40) //judge RX_DR==1? { Low_24L01_CE; //start to transmit SPI_Read_Buf(RD_RX_PLOAD,RX_BUF,TX_PLOAD_WIDTH); //read data from RX_FIFO buffer flag = 1; //end flag of receving data } else{ flag=0; } SPI_RW_Reg(WRITE_REG+STATUS,sta1); //set RX_DR,TX_DS,MAX_PT to 1，to erase interruption flag } for(int i=0;i<5;i++){ transmitByte(RX_BUF[i]); } return 0; } //发送端的主程序 #define F_CPU 3686400UL //To make the delay function work correctly #include #include "nrf24l01.h" #include "usart_routines.h" int main(void){ uchar TX_BUF[5]={'A','B','C','D','E'}; uchar sta1; while(1){ init_NRF24L01(); nRF24L01_TxPacket(TX_BUF); delay_nms(500); sta1=print_register_hyperterminal(STATUS);//print STATUS if((sta1&0x20)||(sta1&0x10)) //if tx_ds or max_rt set { SPI_RW_Reg((READ_REG+STATUS),0xff); //flush TX_DS and MAX_RT Low_24L01_CSN; SPI_RW(FLUSH_TX); //flush TX-FIFO High_24L01_CSN; } transmitByte(0x0d); delay_nms(100); transmitByte(0x0a); delay_nms(100); } return 0; } 
0
|
|
相关推荐
7个回答
|
|
|
|
|
|
|
|
|
数据发送以后，发送端的STATUS寄存器始终是0x0e的状态，tx_ds和max_rt都没有置位,接收端收不到数据，CD寄存器也没有载波信号 |
|
|
2015-6-17 16:07:32
评论
|
|
|
|
|
|
2015-6-17 16:09:16
评论
|
|
|
你用软件SPI吧！！！！！！！！！！！！！！！
|
|
|
|
|
|
|
|
|
2015-6-17 17:25:02
评论
|
|
|
NRF2401感觉对电源的要求很高，如果电源影响过大数据传输会非常不稳定...
我去年搞毕业设计时就碰到过这类问题，我那有电机，在MCU电源两端加上几个电容数据就稳定了... |
|
|
|
|
想懂得 发表于 2015-6-17 19:41 我是AVR和PC连接的，用的是mysmartUSB MK2这块板，USB转换的串口，电源的话也是直接用USB供电的，这样的话要怎么加电容啊？ |
|
|
2015-6-17 21:08:16
评论
|
|
你正在撰写答案
如果你是对答案或其他答案精选点评或询问，请使用“评论”功能。
嵌入式学习-飞凌嵌入式ElfBoard ELF 1板卡-使用AHT20进行环境监测之AHT20传感器介绍
510 浏览 0 评论
792 浏览 0 评论
833 浏览 1 评论
基于瑞萨FPB-RA4E2智能床头灯项目——1编译环境搭建与点亮驱动ws2812全彩LED
797 浏览 0 评论
嵌入式学习-飞凌嵌入式ElfBoard ELF 1板卡-LCD显示图片编程示例之介绍mmap
1244 浏览 0 评论
【youyeetoo X1 windows 开发板体验】少儿AI智能STEAM积木平台
11815 浏览 31 评论
/6 
关注我们的微信
下载发烧友APP
电子发烧友观察
版权所有 © 湖南华秋数字科技有限公司
电子发烧友 （电路图） 湘公网安备 43011202000918 号 电信与信息服务业务经营许可证：合字B2-20210191
工商网监
湘ICP备2023018690号
3213
淘帖
1349
