描述
本引導(dǎo)裝載系統(tǒng)主要由用戶應(yīng)用程序和FBTC(theFlashBurnTargelComponent)程序兩部分構(gòu)成,圖2所示是基于CCS的Flash存儲(chǔ)器燒寫系統(tǒng)框圖。其中,用戶程序除了要完成用戶設(shè)計(jì)要求外,還要對(duì)DSP板上的EMIF寄存器進(jìn)行設(shè)置;FBTC程序則包括FLASH存儲(chǔ)器燒寫算法、初始化操作、地址映射等。
關(guān)于CCS的FLASH存儲(chǔ)器燒寫系統(tǒng)
2.1用戶程序設(shè)計(jì)
用戶可根據(jù)設(shè)計(jì)要求及實(shí)際算法編寫用戶主程序。除此之外,用戶還要根據(jù)自己的目標(biāo)板上存儲(chǔ)器分配進(jìn)行配置。TMS320C6713芯片上電后。若選擇從EMIF引導(dǎo)程序,DSP則自動(dòng)將位于地址空間CE1(Ox90000000~Ox9FlFFFFFFl開頭的1KB代碼傳輸?shù)降刂房臻g0處。它的數(shù)據(jù)傳輸采用默認(rèn)時(shí)序,用戶可以選擇外部程序存儲(chǔ)器的寬度(8位/16位/32位),然后由EMIF自動(dòng)將幾次讀入的數(shù)據(jù)合成為32位數(shù)據(jù)。傳輸由DSP中的ED-MA通道以單幀形式自動(dòng)進(jìn)行。傳輸完成后,程序從地址0處開始運(yùn)行。因此,要在TMS320C6713中實(shí)現(xiàn)基于FLASH的自引導(dǎo)功能,必須將FLASH配置在DSP的CEl地址空間中。
在這里,用戶要編寫的EMIF配置文件是c6713-emif.s62,其程序設(shè)計(jì)代碼如下:
其程序設(shè)計(jì)代碼如下
事實(shí)上,除了要對(duì)EMIF進(jìn)行配置外,用戶還必須在鏈接文件中為某些段制定兩個(gè)不同的地址:一個(gè)是導(dǎo)人地址,一個(gè)是運(yùn)行地址。導(dǎo)入地址用來決定裝載器把段的原始數(shù)據(jù)放在何處,而運(yùn)行地址就是該段代碼運(yùn)行的地址。制定兩個(gè)地址的目的是為了加快代碼執(zhí)行速度。它們的鏈接可由*.cmd文件來實(shí)現(xiàn)。對(duì)存儲(chǔ)器的設(shè)置如下:
IRAM:origin=00000000hlength=”0000FAooh”(內(nèi)部RAM)
FLASH-BOOT:origin=Ox90000000length=”00000400h”(存儲(chǔ)自舉代碼)
FLASH-REST:origin=090000400length=”000lfcOOh”(存儲(chǔ)主程序代碼等)
在完成用戶主程序、EMIF配置文件、鏈接命令文件后,就可利用TI公司的DSP集成開發(fā)環(huán)境CCS進(jìn)行編譯、調(diào)試及鏈接,以生成用戶應(yīng)用程序的目標(biāo)文件*.OUt。
歐美品牌停產(chǎn)的,常用的“PLC”備品備件
我司產(chǎn)品應(yīng)用于以下領(lǐng)域:
1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》
2,《智能平鋼化爐系統(tǒng)制造》
3,《PLC可編程輸送控制系統(tǒng)》
4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》
6,《化工廠藥液恒流量計(jì)算機(jī)控制系統(tǒng)》
7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動(dòng)化控制系列
本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。
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