Si24R1通信异常问题集锦
2.4G通信异常一般都有如下问题,
一次也不能收到数据
(初诊:硬件接线和软件配置问题)
2、在发射端或接收端重新上电的时候,可接收到一次
(初诊:没有及时清空RX FIFO和接收中断标志)
3、由发送模式切换为接收模式后,就不能接收了
(初诊:没有及时清空TX FIFO,RX FIFO和接收中断标志)
4、设置高功率等级之后,就不能接收了
(初诊:供电电流不足)
5、无规律偶发不能接收
(初诊:存在电源干扰)
6、通信距离短,远距离容易丢包,
(初诊:硬件结构和PCB设计影响了天线净空区,造成了信号衰减)7、接收数据后,进入待机模式下,功耗比较大,达到了mA级
(初诊:CE脚没有被拉低)
8、一发多收的时候,存在丢包问题
(初诊:广播通信数量过多的情况下,需要设置更高的信道,适当调整发包间隔
SI24R1驱动程序:
SI24R1.c文件内容:
- #include "SI24R1.h"
- #include "delay.h"
- u8 TX_ADDRESS[TX_ADR_WIDTH] = {0x0A,0x01,0x07,0x0E,0x01};
- /*SPI读写字节函数*/
- static u8 SPI_RW(u8 byte)
- {
- u8 bit_ctr;
- for(bit_ctr=0; bit_ctr<8; bit_ctr++) //轮询8位
- {
- if(byte & 0x80) MOSI = 1; //判断如果最高位是高电平,输出高电平
- else MOSI = 0; //反之输出低电平
- byte = (byte << 1); //左移
- SCK = 1; //SCK为高
- byte |= MISO; //字节值按位或(相加)
- SCK = 0; //SCK为低
- }
- return(byte); //返回字节和
- }
- /*SPI IO初始化函数*/
- void SI24R1_Init(void)
- {
- SCK = 0; //SCK(SPI)时钟引脚拉低
- CSN = 1; //CSN片选引脚拉高
- CE = 0; //CE脚拉低,待机准备状态
- IRQ = 1; //中断引脚拉高,低电平有效
- }
- /*SPI写寄存器函数*/
- u8 SI24R1_Write_Reg(u8 reg, u8 value)
- {
- u8 status;
- CSN = 0; //CSN片选引脚拉低
- status = SPI_RW(reg); //返回写的寄存器值
- SPI_RW(value);//写值
- CSN = 1; //CSN片选引脚拉高
- return(status);
- }
- /*SPI写数据函数*/
- u8 SI24R1_Write_Buf(u8 reg, const u8 *pBuf, u8 bytes)
- {
- u8 status,byte_ctr;
- CSN = 0; //CSN片选引脚拉低
- status = SPI_RW(reg);//返回写的寄存器值
- for(byte_ctr=0; byte_ctr<bytes; byte_ctr++) //数据遍历写入
- SPI_RW(*pBuf++);
- CSN = 1; //CSN片选引脚拉高
- return(status);
- }
- /*SPI读寄存器函数*/
- u8 SI24R1_Read_Reg(u8 reg)
- {
- u8 value;
- CSN = 0;
- SPI_RW(reg);
- value = SPI_RW(0);//读寄存器值
- CSN = 1;
- return(value);
- }
- /*SPI读数据函数*/
- u8 SI24R1_Read_Buf(u8 reg, u8 *pBuf, u8 bytes)
- {
- u8 status,byte_ctr;
- CSN = 0;
- status = SPI_RW(reg);
- for(byte_ctr=0;byte_ctr<bytes;byte_ctr++)
- pBuf[byte_ctr] = SPI_RW(0); //读数据内容
- CSN = 1;
- return(status);
- }
- /*设置接收模式*/
- void SI24R1_RX_Mode(void)
- {
- CE = 0;
- SI24R1_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH);
- SI24R1_Write_Reg(WRITE_REG + EN_AA, 0x01);
- SI24R1_Write_Reg(WRITE_REG + EN_RXADDR, 0x01);
- SI24R1_Write_Reg(WRITE_REG + RF_CH, 40);
- SI24R1_Write_Reg(WRITE_REG + RX_PW_P0, TX_PLOAD_WIDTH);
- SI24R1_Write_Reg(WRITE_REG + RF_SETUP, 0x0f);
- SI24R1_Write_Reg(WRITE_REG + CONFIG, 0x0f);
- SI24R1_Write_Reg(WRITE_REG + STATUS, 0xff);
- CE = 1;
- }
- /*设置发射模式*/
- void SI24R1_TX_Mode(void)
- {
- CE = 0;
- SI24R1_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); ·
- SI24R1_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH);
- SI24R1_Write_Reg(WRITE_REG + EN_AA, 0x01);
- SI24R1_Write_Reg(WRITE_REG + EN_RXADDR, 0x01);
- SI24R1_Write_Reg(WRITE_REG + SETUP_RETR, 0x0a);
- SI24R1_Write_Reg(WRITE_REG + RF_CH, 40);
- SI24R1_Write_Reg(WRITE_REG + RF_SETUP, 0x0f);
- SI24R1_Write_Reg(WRITE_REG + CONFIG, 0x0e);
- }
- /*收包函数*/
- u8 SI24R1_RxPacket(u8 *rxbuf)
- {
- u8 state;
- state = SI24R1_Read_Reg(STATUS);
- SI24R1_Write_Reg(WRITE_REG+STATUS,state);
- if(state & RX_DR)
- {
- SI24R1_Read_Buf(RD_RX_PLOAD,rxbuf,TX_PLOAD_WIDTH);
- SI24R1_Write_Reg(FLUSH_RX,0xff);
- return 0;
- }
- return 1;
- }
- /*发包函数*/
- u8 SI24R1_TxPacket(u8 *txbuf)
- {
- u8 state;
- CE=0;
- SI24R1_Write_Buf(WR_TX_PLOAD, txbuf, TX_PLOAD_WIDTH);
- CE=1;
- while(IRQ == 1);
- state = SI24R1_Read_Reg(STATUS);
- SI24R1_Write_Reg(WRITE_REG+STATUS, state);
- if(state&MAX_RT)
- {
- SI24R1_Write_Reg(FLUSH_TX,0xff);
- return MAX_RT;
- }
- if(state&TX_DS)
- {
- return TX_DS;
- }
- return 0xFF;
- }
- SI24R1.h头文件内容:
- #include "config.h"
- //SI24R1 PIN DEFINITION
- #define MOSI P13 // Master Out, Slave In pin (output)
- #define MISO P10 // Master In, Slave Out pin (input)
- #define SCK P12 // Serial Clock pin, (output)
- #define CSN P15 // Slave Select pin, (output to CSN)
- #define CE P14 // Chip Enable pin signal (output)
- #define IRQ P11 // Interrupt signal, from nRF24L01 (input)
- #define TX_ADR_WIDTH 5 // 5×Ö½Ú¿í¶ÈµÄ·¢ËÍ/½ÓÊÕµØÖ·
- #define TX_PLOAD_WIDTH 32 // Êý¾ÝͨµÀÓÐЧÊý¾Ý¿í¶È
- //********************************************************************************************************************//
- // SPI(SI24R1) commands
- #define READ_REG 0x00 // Define read command to register
- #define WRITE_REG 0x20 // Define write command to register
- #define RD_RX_PLOAD 0x61 // Define RX payload register address
- #define WR_TX_PLOAD 0xA0 // Define TX payload register address
- #define FLUSH_TX 0xE1 // Define flush TX register command
- #define FLUSH_RX 0xE2 // Define flush RX register command
- #define REUSE_TX_PL 0xE3 // Define reuse TX payload register command
- #define NOP 0xFF // Define No Operation, might be used to read status register
- //********************************************************************************************************************//
- // SPI(SI24R1) registers(addresses)
- #define CONFIG 0x00 // 'Config' register address
- #define EN_AA 0x01 // 'Enable Auto Acknowledgment' register address
- #define EN_RXADDR 0x02 // 'Enabled RX addresses' register address
- #define SETUP_AW 0x03 // 'Setup address width' register address
- #define SETUP_RETR 0x04 // 'Setup Auto. Retrans' register address
- #define RF_CH 0x05 // 'RF channel' register address
- #define RF_SETUP 0x06 // 'RF setup' register address
- #define STATUS 0x07 // 'Status' register address
- #define OBSERVE_TX 0x08 // 'Observe TX' register address
- #define RSSI 0x09 // 'Received Signal Strength Indecator' register address
- #define RX_ADDR_P0 0x0A // 'RX address pipe0' register address
- #define RX_ADDR_P1 0x0B // 'RX address pipe1' register address
- #define RX_ADDR_P2 0x0C // 'RX address pipe2' register address
- #define RX_ADDR_P3 0x0D // 'RX address pipe3' register address
- #define RX_ADDR_P4 0x0E // 'RX address pipe4' register address
- #define RX_ADDR_P5 0x0F // 'RX address pipe5' register address
- #define TX_ADDR 0x10 // 'TX address' register address
- #define RX_PW_P0 0x11 // 'RX payload width, pipe0' register address
- #define RX_PW_P1 0x12 // 'RX payload width, pipe1' register address
- #define RX_PW_P2 0x13 // 'RX payload width, pipe2' register address
- #define RX_PW_P3 0x14 // 'RX payload width, pipe3' register address
- #define RX_PW_P4 0x15 // 'RX payload width, pipe4' register address
- #define RX_PW_P5 0x16 // 'RX payload width, pipe5' register address
- #define FIFO_STATUS 0x17 // 'FIFO Status Register' register address
- #define DYNPD 0x1C
- #define FEATURE 0x1D
- //********************************************************************************************************************//
- // STATUS Register
- #define RX_DR 0x40 /**/
- #define TX_DS 0x20
- #define MAX_RT 0x10
- //********************************************************************************************************************//
- // FUNCTION's PROTOTYPES //
- //********************************************************************************************************************//
- //SI24R1 API Functions
- void SI24R1_Init(void); //SI24R1 Pin Init
- u8 SI24R1_Write_Reg(u8 reg, u8 value);
- u8 SI24R1_Write_Buf(u8 reg, const u8 *pBuf, u8 bytes);
- u8 SI24R1_Read_Reg(u8 reg);
- u8 SI24R1_Read_Buf(u8 reg, u8 *pBuf, u8 bytes);
- void SI24R1_RX_Mode(void);
- void SI24R1_TX_Mode(void);
- u8 SI24R1_RxPacket(u8 *rxbuf);
- u8 SI24R1_TxPacket(u8 *txbuf);
- #endif
- Main.c文件内容:
- #include "SI24R1.h"
- #include "delay.h"
- #include "string.h"
- #define LED3 P16
- #define LED4 P35
- #define KEY1 P12
- #define KEY2 P14
- unsigned char tx_data[32]={0};
- unsigned char rx_data[32]={0};
- #define FOSC 22118400L
- #define BAUD 115200//9600
- #define UART_RX_FIFO 32
- unsigned char UART_RX_Data[UART_RX_FIFO];
- /*串口函数初始化*/
- void uart_init(void)
- {
- SCON = 0x50;
- T2L = (65536 - (FOSC/4/BAUD));
- T2H = (65536 - (FOSC/4/BAUD)) >> 8;
- AUXR = 0x14;
- AUXR |= 0x01;
- ES = 1;
- EA = 1;
- }
- /*串口发送字符函数*/
- void SendData(unsigned char Data)
- {
- SBUF = Data;
- while(TI == 0);
- TI = 0;
- }
- /*串口发送字符串函数*/
- void SendString(char *s)
- {
- while(*s)
- {
- SendData(*s++);
- }
- }
- /*串口接收字符函数*/
- void RecvData(unsigned char Data)
- {
- unsigned int i;
- for(i=0;i<UART_RX_FIFO;i++)
- {
- UART_RX_Data[i] = Data;
- }
- while(RI == 0);
- RI = 0;
- }
- /*设置串口响应中断*/
- void UART_i() interrupt 4
- {
- if(RI)
- {
- RI = 0;
- RecvData(SBUF);
- }
- if(TI)
- {
- TI = 0;
- }
- }
- void main(void)
- {
- unsigned char udata=0,rssi;
- uart_init(); //串口初始化
- SI24R1_Init();//2.4G SPI初始化
- #if 0
- SI24R1_TX_Mode(); //设置发射模式
- #else
- SI24R1_RX_Mode(); //设置接收模式
- #endif
- while(1)
- {
- #if 0
- udata = SI24R1_TxPacket(tx_data);//发包
- #else
- udata = SI24R1_RxPacket(rx_data);//收包
- rssi=SI24R1_Read_Reg(RSSI); //获取接收信号强度
- if(rssi == 0)
- {
- SendString("<-60dBm\r\n");
- }
- else
- {
- SendString(">-60dBm\r\n");
- }
- #endif
- delay_ms(50); // Broadcasting interval
- if(udata == 0xff)
- {
- LED4=0;//SendString("send fail\r\n");
- LED3=0;
- SendString("send or recv fail\r\n");
- }
- else
- {
- LED4=1;//SendString("send ok\r\n");
- LED3=1;
- SendString("send or recv ok\r\n");
- }
- }
- }
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