參數(shù)資料
型號: CL-PS7111
廠商: Cirrus Logic, Inc.
英文描述: Low-Power System-on-a-Chip
中文描述: 低功耗系統(tǒng)級晶片
文件頁數(shù): 99/105頁
文件大小: 1207K
代理商: CL-PS7111
PRELIMINARY DATA BOOK v2.0
September 1997
98
APPENDIX A–BOOT CODE
CL-PS7111
Low-Power System-on-a-Chip
01
;
wait for byte available
ldr r1,[r12,#HwStatus];spin, if Rx FIFO is empty
tst r1,#HwStatusUartRxFifoEmpty
bne %b01
; read the data, store it and accumulate checksum
ldrb r0,[r12,#HwUartData]
;read data
strb r0,[r2],#1
;save it in memory
subs r3,r3,#1
;decrement count
bne %b01
;do more if count has not
expired
;
all received, send end flag
ldr r0,=endflag
strb r0,[r12,#HwUartData]
;send reply
ldr r15,=codeexeaddr
;jump to execution
address
LTORG
END
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