为什么cyclone v soc芯片在altera官网报价比它的开发板还要要高

2025-03-16 13:23:42
推荐回答(2个)
回答(1):

这是必须的,
一是:altera就是做FPGA的,他出的开发板是对自己芯片的充分考虑和最优设计(板子、外设、PCB、器件等等)。其他一些公司估计仅是对altera板子的复制。
二是:altera出的板子不仅仅是某个器件的,他是一个代表,可以满足很多应用。
三是:其他第三方的板子的程序仅是一个简单地验证性,他们基本不会再进行开发(仅仅是更新代码),altera的工程师会在他们板子上做各种实验,代码很可能公开,而且很多手册也是对他们的板子进行说明的。
四:这些板子需要第三方代理商购买,会有一定的手续费。
五:还有就是购买周期很长的。
六:altera自身不是专门做板子的,所以他们推出一款板子也要请高级工程师(很牛的那种)进行设计,还要编写代码,制作成本很高的。
最后,如果你的钱充足,基础较好,建议官方的板子。

回答(2):

第一行,在driver/mtd/nand/s3c2410.c中第910行,s3c2410_nand_init函数:
printk("S3C24XX NAND Driver, (c) 2004 Simtec Electronics\n");

行二行,同一文件,第212行,s3c2410_nand_inithw函数:
dev_info(info->device, "Tacls=%d, %dns Twrph0=%d %dns, Twrph1=%d %dns\n", tacls, to_ns(tacls, clkrate), twrph0, to_ns(twrph0, clkrate), twrph1, to_ns(twrph1, clkrate));

第三行,在driver/mtd/nand/nand_base.c中第2346行,
printk(KERN_INFO "NAND device: Manufacturer ID:" " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, dev_id, nand_manuf_ids[maf_idx].name, type->name);

第四行,在driver/mtd/nand/nand_bbt.c中第380行,creat_bbt函数:
Printk(KERN INFO " Scanning device for bad blocks \n");

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