使用SAM-BA調(diào)試的初始步驟

1、使用SAM-BA調(diào)試的初始步驟AT91SAM7S板可以使用SAM-BA?軟件通過DBGU或者USB口編譯。但是AT91SAM7S 系列芯片，出廠后并沒有將SAM-BA Boot 固件復(fù)制到FLASH 存儲(chǔ)器的頭兩個(gè)區(qū)，所以當(dāng)?shù)谝淮瓮ㄟ^USB 連接目標(biāo)板和PC 機(jī)的時(shí)候，需要按照“以下的步驟來復(fù)制SAM-BA Boot 固件到FLASH 并運(yùn)行。1. 1.關(guān)閉AT91SAM7S板電源； 2. 2.把板上的TST跳線連接； 3. 3.打開AT91SAM7S板電源； 4. 4.等10秒； 5. 5.關(guān)閉AT91SAM7S板電源； 6. 6.把板上的TST跳線斷開； 7. 7.打開AT91SAM7S板

2、電源； 8. 8.安裝USB驅(qū)動(dòng)程序：插上USB線，將提示“無法識(shí)別的硬件”，此時(shí)可以安裝atm6124驅(qū)動(dòng)程序 9. 9.打開“SAM-BA GUI”，就可以接著使用USB口下載文件到AT91SAM7S板。SAM-BA調(diào)試的硬件要求:-· DBGUG的硬件要求 o 使用320MHz的石英震晶(軟件自調(diào)適)；· - USB的硬件要求 o 使用18.432MHz的石英震晶； o USB的PIOA16口需要上拉電阻；SAM-BA Notes V1.0 - May 2005The below procedure is applicable to: AT91SAM7S32 &

3、; AT91SAM7S64 starting from rev E (product ID: 58814E)AT91SAM7S128 & AT91SAM7S256 starting from rev C (product ID: 58818C) Getting Started with SAM-BA on the SAM7S-EK Evaluation KitThe AT91SAM7S-EK is ready to use the SAM-BA software through DBGU or USB. Before being able to use SAM-BA

4、, a recovery procedure which consists of copying the SAM-BA Boot Assistant into Flash must be performed as follows:1. Power down the SAM7S-EK 2. Close the Jumper JP5 named TST 3. Power up the SAM7S-EK 4. Wait 10s 5. Power down the SAM7S-EK 6. Remove the Jumper JP5 named TST 7. Power up the

5、 SAM7S-EKSAM-BA Boot Assistant is now available in the first two sectors of the on-chip flash and ready to use. Then, you can start using the SAM-BA GUI to interface with the SAM-BA Boot Assistant as described in the SAM-BA User Guide available in the "on-line" help.How to use SA

6、M-BA on your AT91SAM7S-based devices application ?The AT91SAM7S devices feature the System Recovery procedure which restores the SAM-BA Boot Assistant inside the Flash.System Recovery Procedure When the TST pin is set during power-up and PGMEN0, PGMEN1 and PGMEN2 are set, th

7、e device is entering is a specific test mode and performs a SAM-BA Boot System Recovery which consists in copying the SAM Boot Assistant (SAM-BA) in the first two sectors of the on-chip Flash memory. The system recovery procedure takes 10s.In normal mode, the TST pin can be left uncon

8、nected thanks to the internal pull down. Please note that on the SAM7S-EK, PGMEN0, PGMEN1 and PGMEN2 are set by using the internal pull-up resistors enabled by default after power-up. SAM-BA Boot Assistant is now available in the first two sectors of the on-chip flash and ready to use. Then, yo

9、u can start using the SAM-BA GUI to interface with the SAM-BA Boot Assistant as described in the SAM-BA User Guide available in the "on-line" help.SAM-BA hardware requirements:-· DBGU Requirements o Wide range of Quartz from 3 to 20MHz Quartz (software auto detection)· - USB Requ

10、irements o Limited to a 18.432MHz Quartz o PIOA16 dedicated for the USB Pull-up (refer to the AT91SAM7S-EK Board Schematics) 原文地址 SAM-BA BOOT （轉(zhuǎn)自芯藝）2008-05-29 16:08一.原理     AT91SAM7S64內(nèi)部“隱藏”著一段程序叫SAM-BA BOOT， 它是在出廠時(shí)被固化的，不會(huì)被擦除，也不會(huì)被重寫。由于ATMEL沒有說明    這段程序在哪里所以叫“隱

11、藏”，哈哈      在特定的條件下它會(huì)被復(fù)制到內(nèi)部FLASH首部，這個(gè)復(fù)制的過程叫恢復(fù)系統(tǒng)程序（System Recovery Procedure）      系統(tǒng)程序恢復(fù)后下一次上電或手動(dòng)復(fù)位時(shí)SAM-BA BOOT 就會(huì)得到運(yùn)行， 它使用片上集成的USB或DBGU(其實(shí)就是UART)與上位機(jī)通信    實(shí)現(xiàn)自編程。   二.恢復(fù)系統(tǒng)程序     1.TST PA0 PA1 PA1 四個(gè)引腳保持高的狀態(tài)

12、下復(fù)位并等待10秒，要注意的是復(fù)位時(shí)TST引腳內(nèi)部下拉，為此要通過外部電路將此引腳拉高    在設(shè)計(jì)電路時(shí)這個(gè)引腳上通常外接一個(gè)跳線（請參考AT91SAM7S-EK板），PA0,PA1,PA2復(fù)位時(shí)內(nèi)部上拉，為些這三個(gè)引腳可以懸空，外部電    路要保證不會(huì)在復(fù)位時(shí)將此三個(gè)引腳拉低。      2.再次復(fù)位系統(tǒng)，系統(tǒng)就會(huì)運(yùn)行SAM-BA BOOT，即你的上位機(jī)SAM-BA才會(huì)與之成功連接。   三.ERASE引腳    

13、60; 要注意的是恢復(fù)系統(tǒng)程序的過程是在ERASE引腳懸空或拉低的情況下進(jìn)行的，ERASE引腳內(nèi)部有一下拉電阻為此可以懸空，在任意時(shí)刻上    電狀態(tài)下外部拉高ERASE引腳會(huì)擦除片內(nèi)FLASH和NVM位，并且會(huì)在很短的時(shí)間內(nèi)完成。      當(dāng)你使用SAM-BA對器件編程后執(zhí)行了Enable Security Bit腳本，即編程了FLASH安全位，那么下一次恢復(fù)系統(tǒng)程序前必須拉高引腳ERASE    擦除這個(gè)安全位，不然恢復(fù)系統(tǒng)程序不會(huì)成功。四.SAM-BA軟件使用簡介 &

14、#160;  1.連接 USB連接需要一個(gè)USB驅(qū)動(dòng)程序,但這已經(jīng)在安裝SAM-BA時(shí)已經(jīng)安裝到了系統(tǒng)，但第一次USB連接時(shí)還是會(huì)提示安裝驅(qū)動(dòng)，這時(shí)只需              要系統(tǒng)自動(dòng)查找并安裝即可，如果你運(yùn)行SAM-BA 2.5時(shí)看到如下圖的界面說明你已經(jīng)做好了所有準(zhǔn)備工作，如果年不到原因可能             

15、有以下幾點(diǎn)：              （1）恢復(fù)系統(tǒng)程序未成功              （2）硬件連接存在問題              （3）USB驅(qū)動(dòng)程序未被指定2.使用SAM-BA(1) AT91SA

16、M7xxx Memory Display         這是查看器件內(nèi)FLASH或RAM內(nèi)容的區(qū)域，指定開始地址（Start Address）查看區(qū)域的大?。⊿ize in byte）后按Refresh即可從下      邊列表中看到器件內(nèi)部數(shù)據(jù)     (2) Download/Uploade File         這是我們主要使用欄，在Send File Name中選擇要寫入的程序文件，要注意的是這是個(gè)二進(jìn)制格式，而不是HEX或其它格式，寫入前   &