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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DSP56303 датащи(PDF) 229 Page - Freescale Semiconductor, Inc |
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DSP56303 датащи(HTML) 229 Page - Freescale Semiconductor, Inc |
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229 / 292 page  Bootstrap Code DSP56303 User’s Manual, Rev. 2 Freescale Semiconductor A-7 movepx:M_HRX,p:(r0)+ ; Move the new word into its destination ; location in the program RAM HI08LOOP bra<FINISH ;======================================================================== EPRSCILD jclr #1,omr,EPROMLD ; If MC:MB:MA=001, go load from EPROM ;======================================================================== ; This is the routine that loads from the SCI. ; MC:MB:MA=010 - external SCI clock SCILD movep #$0302,X:M_SCR ; Configure SCI Control Reg movep #$C000,X:M_SCCR ; Configure SCI Clock Control Reg movep #7,X:M_PCRE ; Configure SCLK, TXD and RXD do #6,_LOOP6 ; get 3 bytes for number of ; program words and 3 bytes ; for the starting address jclr #2,X:M_SSR,* ; Wait for RDRF to go high movep X:M_SRXL,A2 ; Put 8 bits in A2 jclr #1,X:M_SSR,* ; Wait for TDRE to go high movep A2,X:M_STXL ; echo the received byte asr #8,a,a _LOOP6 move a1,r0 ; starting address for load move a1,r1 ; save starting address do a0,_LOOP7 ; Receive program words do #3,_LOOP8 jclr #2,X:M_SSR,* ; Wait for RDRF to go high movep X:M_SRXL,A2 ; Put 8 bits in A2 jclr #1,X:M_SSR,* ; Wait for TDRE to go high movep a2,X:M_STXL ; echo the received byte asr #8,a,a _LOOP8 movem a1,p:(r0)+ ; Store 24-bit result in P mem. _LOOP7 bra <FINISH ; Boot from SCI done ;======================================================================== ; This is the routine that loads from external EPROM. ; MC:MB:MA=001 EPROMLD move #BOOT,r2 ; r2 = address of external EPROM movep #AARV,X:M_AAR1 ; aar1 configured for SRAM types of access do #6,_LOOP9 ; read number of words and starting address |
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