[问答]

如何实现Tiny4412通过NRF24L01 2.4G无线模块发送数据呢

问答对人有帮助，内容完整，我也想知道答案 0 Linux下SPI设备驱动该怎样去编写呢？如何实现tiny4412通过NRF24L01 2.4G无线模块发送数据呢？ 0
2021-12-17 06:36:41　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × heks 该类别下有 50 个回答。邀请回答 hgimtk 该类别下有 44 个回答。邀请回答新星之火12138 该类别下有 42 个回答。邀请回答 wang21cj 该类别下有 41 个回答。邀请回答 chm5 该类别下有 40 个回答。邀请回答 hjfjsdgfjdsf 该类别下有 37 个回答。邀请回答 uvysdfydad 该类别下有 35 个回答。邀请回答 fdjslkjd 该类别下有 35 个回答。邀请回答 werywer 该类别下有 35 个回答。邀请回答 h1654155957.9520 该类别下有 35 个回答。邀请回答 jenny042 该类别下有 34 个回答。邀请回答 dfzvzs 该类别下有 34 个回答。邀请回答维生素B2 该类别下有 34 个回答。邀请回答凤毛麟角该类别下有 34 个回答。邀请回答 meihuacg 该类别下有 33 个回答。邀请回答 hfgdzc 该类别下有 33 个回答。邀请回答 ggfvxv 该类别下有 33 个回答。邀请回答刘洋该类别下有 33 个回答。邀请回答江左盟该类别下有 32 个回答。邀请回答爱与友人该类别下有 32 个回答。邀请回答举报 h1654155272.9717 相关推荐 • 如何去实现NRF24L01模块的2.4G无线通信呢 1417 • NRF24L01 2.4G无线模块的引脚是怎样接线的 1628 • 2.4G无线模块nRF24L01测试版的原理图分享 3058 • 2.4G NRF24L01模块的引脚有哪些呢 1187 • NRF24L01 2.4G无线模块功能是什么？ 1316 • 请问NRF24L01模块能否和我买的这个USB口 2.4G 无线串口兼容NRF24L01P 进行通信？ 1284 • 如何去使用STM32中nRF24L01这个无线2.4G收发芯片呢 2769 • 怎样使用NRF24L01 2.4G射频模块去调试demo代码呢 858 • X-CTR100控制器NRF24L01+ 2.4G无线通信模块怎么使用？ 1101 • nrf24l01用的2.4G无线接口怎么都不能将数据发送出去怎么办？ 1946 2个回答

答案对人有帮助，有参考价值 0 硬件平台：友善之臂Ting4412 ： NRF24L01 2.4G无线模块SPI接口内核版本：Linux3.5 硬件连接方式以前在STM32F103C8T6上使用STM32的SPI控制器驱动过NRF24L01 2.4G无线模块，最近学习Linux设备驱动，刚好同学手边有一个Tiny4412开发板就当是练练手，顺便学习学习Linux下SPI设备驱动的编写。 NRF24L01 2.4G无线模块的SPI驱动暂时只是调试通过，能够实现Tiny4412通过NRF24L01 2.4G无线模块发送数据，暂时没写成字符设备驱动，在内核定时器中调用spi_write函数不断发送数据。通信现象： STM32没接到数据就会报错，如下：一旦加载驱动模块，就立马接收正常，如下： ......................................................................................只说流程，不说原理............................................................................ 1、构造struct spi_board_info对象，这里我们暂时构造两个，方便以后在SPI0控制器上挂载两个NFR24L01设备，实现相互收发数据。 struct s3c64xx_spi_csinfo cs0={ .fb_delay = 0, .line = EXYNOS4_GPX3(2),//片选引脚 }; struct s3c64xx_spi_csinfo cs1={ .fb_delay = 0, .line = EXYNOS4_GPX3(4),//片选引脚 }; static struct spi_board_info nrf24l01_spi_info[]={ { .modalias = DEV_NAME_01, .max_speed_hz = 1010001000,//最大时钟，需比设备要求的时钟大，暂选10Mhz .bus_num = 0,/exynos4412 的spi0控制器/ .chip_select = EXYNOS4_GPX3(2),/由spi master确定其最大值/ .mode = SPI_MODE_0, .platform_data = (void)EXYNOS4_GPX3(3), /平台数据，作为NRF24LXX的CE引脚/ .controller_data= (void)&cs0, }, { .modalias = DEV_NAME_02, .max_speed_hz = 1010001000,//最大时钟，需比设备要求的时钟大，暂选10Mhz .bus_num = 0,/exynos4412 的spi0控制器/ .chip_select = EXYNOS4_GPX3(4),/由spi master确定其最大值/ .mode = SPI_MODE_0, .platform_data = (void)EXYNOS4_GPX3(5), /平台数据，作为NRF24LXX的CE引脚/ .controller_data= (void)&cs1, }, }; 2、注册它，内核会依据构造的struct spi_board_info 对象创建对应的struct spi_device对象。在init函数中注册构造好的truct spi_board_info对象static struct spi_board_info nrf24l01_spi_info[] static int __init demo_init(void) { printk(KERN_INFO"current func is-------------------------------------------%sn",__FUNCTION__); /spi_register_board_info 依照spi_board_info 和spi_master的bus_num比较，匹配成功会生成一个对应的spi_device对象 / return spi_register_board_info(nrf24l01_spi_info,ARRAY_SIZE(nrf24l01_spi_info)); } 看看spi_register_board_info干了什么？ int spi_register_board_info(struct spi_board_info const info, unsigned n) //master和bi->board_info的bus_nus比较，相等则调用spi_new_device创建spi_device对象 spi_match_master_to_boardinfo(master, &bi->board_info);调用spi_new_device spi_new_device(struct spi_master master,struct spi_board_info chip) int spi_add_device(struct spi_device spi)//注册struct spi_device /spi_add_device注册struct spi_device时候会做一些判断，一会进去分析 / 分析spi_new_device int spi_register_board_info(struct spi_board_info const info, unsigned n) //master和bi->board_info的bus_nus比较，相等则调用spi_new_device创建spi_device对象 spi_match_master_to_boardinfo(master, &bi->board_info);调用spi_new_device spi_new_device(struct spi_master master,struct spi_board_info chip) int spi_add_device(struct spi_device spi)//注册struct spi_device /spi_add_device注册struct spi_device时候会做一些判断，比如我们第一步构造 static struct spi_board_info中的chip_select会和spi_master的num_chipselect做比较要求设置我们的片选信号不能大于spi_master的num_chipselect * if (spi->chip_select >= spi->master->num_chipselect) { * dev_err(dev, "cs%d >= max %dn",spi->chip_select,spi->master->num_chipselect); * return -EINVAL;//直接报错返回，导致我们不能注册spi_device对象...... * 这个问题怎么解决？我们直接修改spi主控器驱动就好了。 } 修改 vi arch/arm/mach-exynos/mach-tiny4412.c中设置spi控制器函数 * s3c64xx_spi0_set_platdata(NULL,0,1)这个函数就好了，内核默认设置 * 最大片选值为1，也就是说默认最多支持1个spi设备，那好了我们把它修改 * 大一些就好了，直接修改到0xffff，保证它一定能注册成功。 / 至于程序中 struct s3c64xx_spi_csinfo cs0 和struct s3c64xx_spi_csinfo cs1怎么来的？为什么需要这两个？这个是安装驱动后看内核看内核打印错误信息找出来的。出错的地方为 driversspispi-s3c64xx.c的static int s3c64xx_spi_setup(struct spi_device spi)函数中报if (IS_ERR_OR_NULL(cs)) { dev_err(&spi->dev, "No CS for SPI(%d)n", spi->chip_select); return -ENODEV; } 意思是cs为空，那么追溯cs，发现 spi_device spi->controller_data = cs;那好，我们就在 static struct spi_board_info nrf24l01_spi_info[]添加.controller_data= (void)&cs0即可。 struct s3c64xx_spi_csinfo cs0={ .fb_delay = 0, .line = EXYNOS4_GPX3(2), }; struct s3c64xx_spi_csinfo cs1={ .fb_delay = 0, .line = EXYNOS4_GPX3(4), }; 好了下面编译成模块，但是编译的时候报WARNING: "spi_register_board_info"/nrf24xx_spi_device.ko] undefined!第一感觉是 spi_register_board_info相关的头文件没有，但是相关spi的头文件都加了，查资料发现原来是linux3.5源码中没有将spi_register_board_info函数导出符号表。那好，就编译进内核得了，将nrf24xx_spi_device.c复制drivers/spi目录下，修改Makefile，将nrf24xx_spi_device.c编译进内核。下面先给出nrf24xx_spi_device.c源码。 #include #include #include #include #include #include #include #include #include #include #include /***************硬件相关的信息*************/ #define DEV_NAME_01 "nrf24xx_spi_01" #define DEV_NAME_02 "nrf24xx_spi_02" #define DEV1_CS_PIN EXYNOS4_GPX3(2) #define DEV2_CS_PIN EXYNOS4_GPX3(4) #define DEV1_CE_PIN EXYNOS4_GPX3(3) #define DEV2_CE_PIN EXYNOS4_GPX3(5) / 片选引脚接在GPX3_2 / struct s3c64xx_spi_csinfo cs0={ .fb_delay = 0, .line = EXYNOS4_GPX3(2),//片选引脚 }; struct s3c64xx_spi_csinfo cs1={ .fb_delay = 0, .line = EXYNOS4_GPX3(4),//片选引脚 }; static struct spi_board_info nrf24l01_spi_info[]={ { .modalias = DEV_NAME_01, .max_speed_hz = 210001000,//最大时钟，需比设备要求的时钟大，暂选2Mhz .bus_num = 0,/exynos4412 的spi0控制器/ .chip_select = EXYNOS4_GPX3(2),/由spi master确定其最大值/ .mode = SPI_MODE_0, .platform_data = (void)EXYNOS4_GPX3(3), /平台数据，作为NRF24LXX的CE引脚/ .controller_data= (void)&cs0, }, { .modalias = DEV_NAME_02, .max_speed_hz = 210001000,//最大时钟，需比设备要求的时钟大，暂选2Mhz .bus_num = 0,/exynos4412 的spi0控制器/ .chip_select = EXYNOS4_GPX3(4),/由spi master确定其最大值/ .mode = SPI_MODE_0, .platform_data = (void)EXYNOS4_GPX3(5), /平台数据，作为NRF24LXX的CE引脚/ .controller_data= (void)&cs1, }, }; static int __init demo_init(void) { printk(KERN_INFO"current func is-------------------------------------------%sn",__FUNCTION__); /spi_register_board_info 依照spi_board_info 和spi_master的bus_num比较，匹配成功会生成一个对应的spi_device对象 / return spi_register_board_info(nrf24l01_spi_info,ARRAY_SIZE(nrf24l01_spi_info)); } static void __exit demo_exit(void) { printk(KERN_INFO"current func is-----%sn",__FUNCTION__); } module_init(demo_init); module_exit(demo_exit); MODULE_LICENSE("GPL"); make zImage，启动内核。在sys/bus/spi/devices目录下出现下面spi0.220 spi0.222两个节点其中0表示bus_num,220和222表示我们的static struct spi_board_info nrf24l01_spi_info[0]的.chip_select = EXYNOS4_GPX3(2),//这个宏的值就是220同理222就是EXYNOS4_GPX3(4)，默认内核只创建spi0.0、spi2.0。注意现在只是在内核中创建了spi_device，还没nrf24xx的驱动。nrf24xx_spi_driver就是在STM32程序基础上简单的修修改改就好了，对比Tiny4412和STM32的程序你会发现关于nrf24l01的代码名字是一样的。 ..............................................................下面就直接给出nrf24xx_spi_driver.c的源码......................................................................... #include #include #include #include #include #include #include #include #include #include #include /****************硬件相关的信息*************/ #define DEV_NAME_01 "nrf24xx_spi_01" #define DEV_NAME_02 "nrf24xx_spi_02" #define DEV1_CS_PIN EXYNOS4_GPX3(2) #define DEV2_CS_PIN EXYNOS4_GPX3(4) #define DEV1_CE_PIN EXYNOS4_GPX3(3) #define DEV2_CE_PIN EXYNOS4_GPX3(5) / 片选引脚接在GPX3_2 / struct s3c64xx_spi_csinfo cs0={ .fb_delay = 0, .line = EXYNOS4_GPX3(2),//片选引脚 }; struct s3c64xx_spi_csinfo cs1={ .fb_delay = 0, .line = EXYNOS4_GPX3(4),//片选引脚 }; static struct spi_board_info nrf24l01_spi_info[]={ { .modalias = DEV_NAME_01, .max_speed_hz = 210001000,//最大时钟，需比设备要求的时钟大，暂选2Mhz .bus_num = 0,/exynos4412 的spi0控制器/ .chip_select = EXYNOS4_GPX3(2),/由spi master确定其最大值/ .mode = SPI_MODE_0, .platform_data = (void)EXYNOS4_GPX3(3), /平台数据，作为NRF24LXX的CE引脚/ .controller_data= (void)&cs0, }, { .modalias = DEV_NAME_02, .max_speed_hz = 210001000,//最大时钟，需比设备要求的时钟大，暂选2Mhz .bus_num = 0,/exynos4412 的spi0控制器/ .chip_select = EXYNOS4_GPX3(4),/由spi master确定其最大值/ .mode = SPI_MODE_0, .platform_data = (void)EXYNOS4_GPX3(5), /平台数据，作为NRF24LXX的CE引脚/ .controller_data= (void)&cs1, }, }; static int __init demo_init(void) { printk(KERN_INFO"current func is-------------------------------------------%sn",__FUNCTION__); /spi_register_board_info 依照spi_board_info 和spi_master的bus_num比较，匹配成功会生成一个对应的spi_device对象 / return spi_register_board_info(nrf24l01_spi_info,ARRAY_SIZE(nrf24l01_spi_info)); } static void __exit demo_exit(void) { printk(KERN_INFO"current func is-----%sn",__FUNCTION__); } module_init(demo_init); module_exit(demo_exit); MODULE_LICENSE("GPL"); 就当是记笔记。

2021-12-17 11:11:49 评论举报孙巍

答案对人有帮助，有参考价值 0 编译驱动，并加载模块，在sys/bus/spi/drivers/目录下出现我们的nrf24xxspi驱动，如下图： ..................................................................................下面直接给出STM32的源码......................................................................... #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "nrf24xx.h" #define DEVICE_NUM 1 #define GPX3CON 0x11000C60 #define GPX3DAT 0x11000C64 #define DEV_NAME_01 "nrf24xx_spi_01" #define DEV_NAME_02 "nrf24xx_spi_02" #define DEV_NAME DEV_NAME_01 #define DEV1_CS_PIN EXYNOS4_GPX3(2) #define DEV2_CS_PIN EXYNOS4_GPX3(4) #define DEV1_CE_PIN EXYNOS4_GPX3(3) #define DEV2_CE_PIN EXYNOS4_GPX3(5) unsigned char TX_ADDRESS[TX_ADR_WIDTH_5]={0x34,0x43,0x10,0x10,0x01}; //发送地址 unsigned char RX_ADDRESS[TX_ADR_WIDTH_5]={0x34,0x43,0x10,0x10,0x01}; static struct work_struct work; struct timer_list timer; struct spi_device nrf24xx_spi; static int nrf24l01_spi_probe(struct spi_device spi); static int nrf24l01_spi_remove(struct spi_device spi); void Nrf24L10_RX_Mode(void); void Nrf24L10_TX_Mode(void); unsigned char SPI1_ReadBuf(unsigned char reg,unsigned char buf,unsigned char length); unsigned char SPI1_SendBuf(unsigned char reg,unsigned char buf,unsigned char length); unsigned char SPI1_Write_Register(unsigned char reg,unsigned char data); void Active_Nrf24l10(unsigned char cmd); unsigned int SPI1_Read_Reg(unsigned char reg,unsigned char status); unsigned char Nrf24l10_SendBuf(unsigned char* data_buffer, unsigned char length); unsigned char Nrf24l0_ReceiveBuf(unsigned char buf); unsigned char Nrf24l10_Irq(void); char tmp=0,counter =0; static struct spi_driver nrf24l01_spi_driver={ .driver={ .name = DEV_NAME, .bus =&spi_bus_type, .owner = THIS_MODULE, }, .probe = nrf24l01_spi_probe, .remove =__devexit_p(nrf24l01_spi_remove), }; static void timer_function(unsigned long counter) { //printk(KERN_INFO"current func is-----%sn",__FUNCTION__); tmp = tmp?0:1; gpio_set_value(DEV2_CE_PIN,tmp); mod_timer(&timer,jiffies+HZ); schedule_work(&work); } /中断底半部中发送数据/ static void irqBottom(struct work_struct work) { char wbuf[50]={0}; int ret =0; // char reg = EN_AA; counter = counter>30? 0:counter; sprintf(wbuf,"Message Comes From Linux -%d %c",counter,''); counter++; ret = Nrf24l10_SendBuf(wbuf,RX_PLOAD_WIDTH_32);//该函数会导致休眠，不能在中断函数中使用 printk("Message Send to STM3 .......%dn",counter); } static int nrf24l01_spi_probe(struct spi_device spi) { nrf24xx_spi = spi; printk(KERN_INFO"current func is-----%sn",__FUNCTION__); printk(KERN_INFO"max_speed_hz:%dn",spi->max_speed_hz); printk(KERN_INFO"chip_select:%dn",spi->chip_select); INIT_WORK(&work, irqBottom); s3c_gpio_cfgpin(DEV1_CS_PIN, S3C_GPIO_OUTPUT);//设置片选为输出 s3c_gpio_cfgpin(DEV2_CS_PIN, S3C_GPIO_OUTPUT);//设置片选为输出 s3c_gpio_cfgpin(DEV1_CE_PIN, S3C_GPIO_OUTPUT);//设置片选为输出 s3c_gpio_cfgpin(DEV2_CE_PIN, S3C_GPIO_INPUT);//设置片选为输出 Nrf24L10_TX_Mode(); init_timer(&timer);//初始化内核定时器 timer.function = timer_function; add_timer(&timer); return 0; } static int nrf24l01_spi_remove(struct spi_device spi) { printk(KERN_INFO"current func is-----%sn",__FUNCTION__); del_timer(&timer); return 0; } static int __init demo_init(void) { int err; printk(KERN_INFO"current func is-----%sn",__FUNCTION__); err = spi_register_driver(&nrf24l01_spi_driver); return err; } static void __exit demo_exit(void) { printk(KERN_INFO"current func is-----%sn",__FUNCTION__); spi_unregister_driver(&nrf24l01_spi_driver); } module_init(demo_init); module_exit(demo_exit); MODULE_LICENSE("GPL"); void Nrf24L10_RX_Mode(void) { Active_Nrf24l10(0);//进入设置模式 SPI1_SendBuf(WRITE_REG1 + RX_ADDR_P0, RX_ADDRESS, TX_ADR_WIDTH_5); //数据通道0发送地址，最大5个字节 SPI1_Write_Register(WRITE_REG1 + EN_AA, 0x01); // 使能通道0-通道5接收自动应答 SPI1_Write_Register(WRITE_REG1 + EN_RXADDR, 0x01); //接收通道0-5 使能 SPI1_Write_Register(WRITE_REG1 + RF_CH, 40); // 选择射频工作频道0 范围0-127 频道选择寄存器 SPI1_Write_Register(WRITE_REG1+RX_PW_P0,RX_PLOAD_WIDTH_32); SPI1_Write_Register(WRITE_REG1 + RF_SETUP, 0x0f); SPI1_Write_Register(WRITE_REG1 + CONFIG, 0x0f); Active_Nrf24l10(1);//激活发送 } void Nrf24L10_TX_Mode(void) { Active_Nrf24l10(0); SPI1_SendBuf(WRITE_REG1 + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH_5); //数据通道0发送地址，最大5个字节 SPI1_SendBuf(WRITE_REG1 + RX_ADDR_P0, RX_ADDRESS, TX_ADR_WIDTH_5);//数据通道0发送地址，最大5个字节 SPI1_Write_Register(WRITE_REG1 + EN_AA, 0x01);// 使能通道0-通道5接收自动应答 SPI1_Write_Register(WRITE_REG1 + EN_RXADDR, 0x01);//接收通道0-5 使能 SPI1_Write_Register(WRITE_REG1+SETUP_RETR,0x1a); SPI1_Write_Register(WRITE_REG1 + RF_CH, 40);// 选择射频工作频道0 范围0-127 频道选择寄存器 SPI1_Write_Register(WRITE_REG1 + RF_SETUP, 0x0f); SPI1_Write_Register(WRITE_REG1 + CONFIG, 0x0e); Active_Nrf24l10(1); // 使能发送模式 } unsigned int SPI1_Read_Reg(unsigned char reg,unsigned char status) { unsigned char wbuf=reg; struct spi_message m; struct spi_transfer t[2] = { { .tx_buf = &wbuf, .len = 1, }, { .rx_buf = status, .len = 1, }, }; spi_message_init(&m); spi_message_add_tail(&t[0], &m); spi_message_add_tail(&t[1], &m); return spi_sync(nrf24xx_spi, &m); } unsigned char SPI1_Write_Register(unsigned char reg,unsigned char data) { unsigned char wbuf[2]={0}; struct spi_message m; struct spi_transfer t = { .tx_buf = wbuf, .len = 2, }; //printk(KERN_INFO"current func is-----%sn",__FUNCTION__); wbuf[0]=reg; wbuf[1]=data; spi_message_init(&m); spi_message_add_tail(&t, &m); return spi_sync(nrf24xx_spi, &m); } / SPI1发送一个缓冲区 / unsigned char SPI1_SendBuf(unsigned char reg,unsigned char buf,unsigned char length) { struct spi_message m; unsigned char wbuf=reg; struct spi_transfer t[2] = { { .tx_buf = &wbuf, .len = 1, }, { .tx_buf = buf, .len = length, }, }; spi_message_init(&m); spi_message_add_tail(&t[0], &m); spi_message_add_tail(&t[1], &m); return spi_sync(nrf24xx_spi, &m); } unsigned char SPI1_ReadBuf(unsigned char reg,unsigned char buf,unsigned char length) { unsigned char wbuf=reg; struct spi_message m; struct spi_transfer t[2] = { { .tx_buf = &wbuf, .len = 1, }, { .rx_buf = buf, .len = length, } }; spi_message_init(&m); spi_message_add_tail(&t[0], &m); spi_message_add_tail(&t[1], &m); return spi_sync(nrf24xx_spi, &m); } void Active_Nrf24l10(unsigned char cmd) { gpio_set_value(DEV2_CE_PIN,cmd); } unsigned char Nrf24l0_ReceiveBuf(unsigned char buf) { unsigned char status = 0; SPI1_Read_Reg(STATUS,&status); SPI1_Write_Register(WRITE_REG1 +STATUS ,status);//清除相应的标志位 if(status & RX_OK) { SPI1_ReadBuf(RD_RX_PLOAD,buf,RX_PLOAD_WIDTH_32); SPI1_Write_Register(FLUSH_RX,0xff); return RX_OK; //接收成功返回RX_OK } return OTHER_ERROR; } unsigned char Nrf24l10_SendBuf(unsigned char* data_buffer, unsigned char length) { unsigned char status = 0; Active_Nrf24l10(0); SPI1_SendBuf(WR_TX_PLOAD,data_buffer,TX_PLOAD_WIDTH_32);//写数据到TX BUF 32个字节 // SPI1_SendBuf(WR_TX_PLOAD,data_buffer,length);//写数据到TX BUF 32个字节 Active_Nrf24l10(1); while(1 == Nrf24l10_Irq())//等待发送完成事件 { //printk("Nrf24l10_Irq..............n"); schedule_timeout(HZ/50);//HZ=100 , 每10ms jiffies+1 } SPI1_Read_Reg(STATUS,&status); SPI1_Write_Register(WRITE_REG1 +STATUS ,status);//清除相应的标志位 if(status & TX_OK) { return TX_OK; //接收成功返回RX_OK }else if(status & MAX_RET_FLAG) { SPI1_Write_Register(FLUSH_TX,0xff); return MAX_RET_FLAG; //否则返回ERROR } return OTHER_ERROR; } unsigned char Nrf24l10_Irq(void) { return gpio_get_value(DEV2_CE_PIN); } 新手整整搞了3天才调通，还有有些地方说的不好，见谅。

2021-12-17 11:12:50 评论举报李万寿