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大家好，我用的是异步传输，地址数据不共用地址数据，单独读写，我在board_am335xevm.c下面修改了如下信息
static struct pinmux_config gpmc_FPGA_pin_mux[] = [ ["gpmc_ad0.gpmc_ad0", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad1.gpmc_ad1", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad2.gpmc_ad2", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad3.gpmc_ad3", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad4.gpmc_ad4", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad5.gpmc_ad5", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad6.gpmc_ad6", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad7.gpmc_ad7", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad8.gpmc_ad8", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad9.gpmc_ad9", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad10.gpmc_ad10", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad11.gpmc_ad11", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad12.gpmc_ad12", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad13.gpmc_ad13", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad14.gpmc_ad14", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_ad15.gpmc_ad15", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP], ["gpmc_a1.gpmc_a1", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA], ["gpmc_a2.gpmc_a2", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA], ["gpmc_a3.gpmc_a3", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA], ["gpmc_a4.gpmc_a4", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA], ["gpmc_a5.gpmc_a5", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA], ["gpmc_a6.gpmc_a6", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA], ["gpmc_a7.gpmc_a7", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA], ["gpmc_a8.gpmc_a8", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA], ["gpmc_csn1.gpmc_csn1", OMAP_MUX_MODE0 | AM33XX_PULL_DISA], ["gpmc_oen_ren.gpmc_oen_ren", OMAP_MUX_MODE0 | AM33XX_PULL_DISA], ["gpmc_wen.gpmc_wen", OMAP_MUX_MODE0 | AM33XX_PULL_DISA], ["gpmc_clk.gpmc_wait1", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLUP], [NULL, 0], ]; //引脚的定义 static void gpmc_fpga_init(void) [ //struct gpmc_devices_info gpmc_device[2] =[ //[NULL, GPMC_DEVICE_NOR], //]; //omap_init_gpmc(gpmc_device,sizeof(gpmc_device)); setup_pin_mux(gpmc_fpga_pin_mux); //omap_init_elm(); ] [gpmc_fpga_init, DEV_ON_BASEBOARD,PROFILE_ALL], 6个寄存器的配置如下 #define STNOR_GPMC_CONFIG1 0x00251000 #define STNOR_GPMC_CONFIG2 0x00080801 #define STNOR_GPMC_CONFIG3 0x00020201 #define STNOR_GPMC_CONFIG4 0x0602c662 #define STNOR_GPMC_CONFIG5 0x01050808 #define STNOR_GPMC_CONFIG6 0x05070142 //#define STNOR_GPMC_CONFIG7 0x00000f50 请问各位在board_am335xevm.c中的static void gpmc_fpga_init(void) 函数里是否应该加上omap_init_gpmc(gpmc_device,sizeof(gpmc_device));和omap_init_elm(); 
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驱动是按照网上的一个帖子写的http://bbs.eeworld.com.cn/thread-333652-1-1.html。做了一点修改该，下面是我的驱动
#define STNOR_GPMC_CONFIG1 0x00251000 //002a2000,28601000 #define STNOR_GPMC_CONFIG2 0x00080801//0x00011001 #define STNOR_GPMC_CONFIG3 0x00020201 #define STNOR_GPMC_CONFIG4 0x0602c662//0x08031003 #define STNOR_GPMC_CONFIG5 0x01050808//0x000f1111 #define STNOR_GPMC_CONFIG6 0x05070142//0x0f030080 //#define STNOR_GPMC_CONFIG7 0x00000f50 static const u32 gpmc_nor[7] = [ STNOR_GPMC_CONFIG1, STNOR_GPMC_CONFIG2, STNOR_GPMC_CONFIG3, STNOR_GPMC_CONFIG4, STNOR_GPMC_CONFIG5, STNOR_GPMC_CONFIG6, //STNOR_GPMC_CONFIG7, 0, ]; int fpga_ioctl(struct file *filp,unsigned int cmd,unsigned long arg) [ ssize_t status; char write_buff[] = "the gpmc driver is ok!"; switch(cmd) [ case 0: if(down_interruptible(&fpga_dev.sem)) return -ERESTARTSYS; fpga_dev.addr = arg; printk("n*********write add = 0x%xn",fpga_dev.addr); //up(&fpga_dev.sem); break; case 1: if(down_interruptible(&fpga_dev.sem)) return -ERESTARTSYS; if(copy_to_user(((char *)arg),write_buff,sizeof(write_buff)+1)) [ status = -EFAULT; goto read_done_xd; ] //printk("read_buff_done:%snr",write_buff); //up(&fpga_dev.sem); break; default: return ENOTTY; ] read_done_xd: [ printk("ioctl done!!nr"); up(&fpga_dev.sem); ] return status; ] static ssize_t fpga_write(struct file *filp, const char __user *buff, size_t count, loff_t *f_pos) [ ssize_t status; size_t len = USER_BUFF_SIZE - 1; int i,tmp; if (count == 0) return 0; if (down_interruptible(&fpga_dev.sem)) return -ERESTARTSYS; if (len > count) len = count; memset(fpga_dev.user_buff, 0, USER_BUFF_SIZE); if (copy_from_user(fpga_dev.user_buff, buff, len)) [ status = -EFAULT; goto fpga_write_done; ] /* do something with the user data */ printk("fpga_write_xdn"); for (i = 0; i < len; i=i+2) [ tmp = fpga_dev.user_buff | fpga_dev.user_buff[i+1] << 8; writew(tmp,fpga_base+fpga_dev.addr+fpga_dev.addr); //在指定地址里写入数据16BIT; ] for (i = 0; i < len; i++) [ printk("0x%x ",fpga_dev.user_buff); ] printk("n"); fpga_write_done: printk("*******before write up sem******n"); up(&fpga_dev.sem); printk("*******after write up sem******n"); return status; ] static ssize_t fpga_read(struct file *filp, const char __user *buff, size_t count, loff_t *f_pos) [ size_t status; size_t len = USER_BUFF_SIZE -1; if(count == 0) return 0; printk("*******before read down sem******n"); if(down_interruptible( &fpga_dev.sem)) return -ERESTARTSYS; printk("*******after read down sem******n"); if(len>count) len = count; memset(fpga_dev.user_buff,0,USER_BUFF_SIZE); printk("*******before readb******n"); fpga_dev.user_buff[0]= readb(fpga_base+fpga_dev.addr+fpga_dev.addr); fpga_dev.user_buff[1]= readb(fpga_base+fpga_dev.addr+fpga_dev.addr+1); printk("fpga_read_xd len= n"); if(copy_to_user(buff,fpga_dev.user_buff,len)) [ status = -EFAULT; goto fpga_read_done; ] fpga_read_done: printk("fpga_read_done_xdn"); up(&fpga_dev.sem); return status; ] static int fpga_open(struct inode *inode, struct file *filp) [ int status = 0; if (down_interruptible(&fpga_dev.sem)) return -ERESTARTSYS; if (!fpga_dev.user_buff) [ fpga_dev.user_buff = kmalloc(USER_BUFF_SIZE, GFP_KERNEL); if (!fpga_dev.user_buff) [ printk(KERN_ALERT "fpga_open: user_buff alloc failedn"); status = -ENOMEM; ] ] up(&fpga_dev.sem); return status; ] static const struct file_operations fpga_fops = [ .owner = THIS_MODULE, .open = fpga_open, .read = fpga_read, .write = fpga_write, .unlocked_ioctl = fpga_ioctl, ]; static int __init fpga_init_cdevice(void) [ int error; u32 val; fpga_dev.devt = MKDEV(251,0); error = alloc_chrdev_region(&fpga_dev.devt,0,1,"fpga"); if (error) [ printk(KERN_ALERT "alloc_chrdev_region() failed: %dn", error); return error; ] cdev_init(&fpga_dev.cdev, &fpga_fops); fpga_dev.cdev.owner = THIS_MODULE; error = cdev_add(&fpga_dev.cdev, fpga_dev.devt, 1); if (error) [ printk(KERN_ALERT "cdev_add() failed: %dn", error); unregister_chrdev_region(fpga_dev.devt, 1); return error; ] printk("Getting Chip Selectn"); val = gpmc_cs_read_reg(GPMC_CS,GPMC_CS_CONFIG7); //关闭片选 val &= ~GPMC_CONFIG7_CSVALID; gpmc_cs_write_reg(GPMC_CS,GPMC_CS_CONFIG7,val); gpmc_cs_configure(GPMC_CS, GPMC_SET_IRQ_STATUS, 0); /*set irq status*/ gpmc_cs_configure(GPMC_CS, GPMC_ENABLE_IRQ, 0); /*disable irqs*/ gpmc_cs_write_reg(GPMC_CS, GPMC_CS_CONFIG1, gpmc_nor[0]); gpmc_cs_write_reg(GPMC_CS, GPMC_CS_CONFIG2, gpmc_nor[1]); gpmc_cs_write_reg(GPMC_CS, GPMC_CS_CONFIG3, gpmc_nor[2]); gpmc_cs_write_reg(GPMC_CS, GPMC_CS_CONFIG4, gpmc_nor[3]); gpmc_cs_write_reg(GPMC_CS, GPMC_CS_CONFIG5, gpmc_nor[4]); gpmc_cs_write_reg(GPMC_CS, GPMC_CS_CONFIG6, gpmc_nor[5]); //gpmc_cs_write_reg(GPMC_CS, GPMC_CS_CONFIG7, gpmc_nor[6]); val = gpmc_cs_read_reg(GPMC_CS, GPMC_CS_CONFIG7); printk("GPMC_CS_CONFIG7 value 0x%xn", val); if (gpmc_cs_request(GPMC_CS, SZ_2K, (unsigned long *)&mem_base) < 0) [ printk(KERN_ERR "Failed request for GPMC mem for usrp_en"); return -1; ] printk("Got CS2, address = %lxn", mem_base); if (!request_mem_region(mem_base, SZ_2K, "mem_fpga")) [ printk(KERN_ERR "Request_mem_region failed.n"); gpmc_cs_free(GPMC_CS); return -1; ] fpga_base = ioremap(mem_base, SZ_2K); gpmc_cs_configure(GPMC_CS, GPMC_ENABLE_IRQ, 1); val = gpmc_cs_read_reg(GPMC_CS,GPMC_CS_CONFIG7); val |= GPMC_CONFIG7_CSVALID; gpmc_cs_write_reg(GPMC_CS,GPMC_CS_CONFIG7,val); return 0; ] static int __init fpga_init_class(void) [ struct device *device; fpga_dev.class = class_create(THIS_MODULE, "fpga"); if (IS_ERR(fpga_dev.class)) [ printk(KERN_ALERT "class_create(fpga) failedn"); return PTR_ERR(fpga_dev.class); ] device = device_create(fpga_dev.class, NULL, fpga_dev.devt, NULL, "fpga"); if (IS_ERR(device)) [ class_destroy(fpga_dev.class); return PTR_ERR(device); ] return 0; ] static int __init fpga_init(void) [ printk(KERN_INFO "fpga_init()n"); memset(&fpga_dev, 0, sizeof(struct fpga_dev)); sema_init(&fpga_dev.sem, 1); if (fpga_init_cdevice()) goto init_fail_1; if (fpga_init_class()) goto init_fail_2; return 0; init_fail_2: cdev_del(&fpga_dev.cdev); unregister_chrdev_region(fpga_dev.devt, 1); init_fail_1: return -1; ] module_init(fpga_init); static void __exit fpga_exit(void) [ printk(KERN_INFO "fpga_exit()n"); device_destroy(fpga_dev.class, fpga_dev.devt); class_destroy(fpga_dev.class); cdev_del(&fpga_dev.cdev); unregister_chrdev_region(fpga_dev.devt, 1); release_mem_region(mem_base, SZ_2K); gpmc_cs_free(GPMC_CS); iounmap(fpga_base); if (fpga_dev.user_buff) kfree(fpga_dev.user_buff); ] module_exit(fpga_exit); |
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60user99 发表于 2018-6-4 15:50 int fd,i,res; unsigned char buf[PAGE_SIZE]; unsigned char read_buff[2]; printf("GPMC Test startnr"); fd=open(FPGA_DEV,O_RDWR); if(fd<0) [ printf("Can't Open %s !!!nr",FPGA_DEV); return -1; ] for(i=0;i buf = i%256; ] ioctl(fd,0,0xaa); //ioctl(fd,1,read_buff); //printf("%snr",read_buff); for(i=0;i<100;i++) [ write(fd,&buf,PAGE_SIZE); ] //read(fd,&read_buff,2); //printf(" read from gpmc : 0x%x,0x%xnr",read_buff[1],read_buff[0]); close(fd); return 0; 这个是测试程序，但是每次都只写入一次10个字节，到下一个循环式就卡死了 在第二fpga_write那里就卡住了。。。 printk("fpga_write_xdn"); for (i = 0; i < len; i=i+2) [ tmp = fpga_dev.user_buff | fpga_dev.user_buff[i+1] << 8; writew(tmp,fpga_base+fpga_dev.addr+fpga_dev.addr); //在指定地址里写入数据16BIT; ] 求大家帮忙分析 |
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进一步发现在第二轮写时在写第7第8字节时就卡在了writew。不知道什么原因 |
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很多客户都是参考那个帖子写的FPGA读写代码，能够正常工作的。但是具体FPGA的读写时序和工作方式不一样，需要修改GPMC的配置 |
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谢谢，是config配置的问题，问一下，为什么我每次配置了wait后就传不了数据，就像上面说的一样，数据卡死，取消wait就一切正常 |
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请问如何使用wait信号，是不是只要设置寄存器就可以了，要申请中断号吗？ |
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我们的TRM的7.1.3.3.8.3里面有有关wait信号的使用，应该是不需要中断的，也没看到系统中断list里面有这个中断号。 其实wait这个信号主要还是接NAND或者NOR才用的 |
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344868615qq 发表于 2018-6-4 17:20 有个中断使能寄存器 这里也有关于wait信号中断的说明，所以想问是不是只要设置寄存器就可以，不需要自己写中断处理函数，系统会自己插入时钟？ |
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jian 你好 am335x 能和fpga通信吗？？？ 如果能通信., 用什么接口, 用什么方式？ |
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你好，请问你有没有写相关的博客，刚好做这个方向，一头雾水 |
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