Re: 可以請大家推薦 Linux 嵌入式系統的硬體及書嗎?

※ 引述《[e-mail] (try or test)》之銘言：
> > ICE+開發板學習起來才是最有效率的，當然也可以自己銲，
> > 有一些 ARM7 就是做成單晶片，有內建 SRAM & FlashRom，
> > ICE 也可以省下來，對岸有人公布接 Printer 的 JTAG 小板
> > 線路，先從基礎練起、例如如何驅動TIMER，如何處理中斷，
> > 如何看示波器除錯，自己找個小專題練習，個人認為這才是
> > 正確學習的方式
>       請教個問題, JTAG 能讀出板子上或內建的 FlashRom 的內容嗎 ?

Why not...

1st : Write the host side JTAG slave or master monitor program, you may write
      a console in PC to drive the UART or Parallel port or USB...etc.
      Implement the pin assignment from serial port to JTAG.

2nd : Implement the JTAG R/W function of target processor
      By TDO, TDI, TMS, TCK...etc.

3rd : Set the system clock via the R/W functions

4th : Trigger the processor to reset

5th : Initial the memory interface if your flash use memory interface.
      ( Or initial the serial interface controller if your flash is attached
        to a serial bus like I2C or SPI...etc, sure, you need to pack the I2C
      or SPI command to your payload via the JTAG protocol)

6th : Follow the flash chip specification to initialize the flash device.

6th : Read the flash just from the memory controller(or serial bus
      controller)
...
Final: If you want to write the flash, read the flash chip specification,
       usually you'll need a special procedure to program the flash.

PS. It's just my experience, maybe not suitable for everyone.
--
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