CL-PS7111-VC-A 데이터 시트보기 (PDF) - Cirrus Logic

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CL-PS7111-VC-A

Low-Power System-on-a-Chip

Cirrus Logic 

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

expired

%b01

;do more if count has not

;

all received, send end flag

ldr

r0,=endflag

strb r0,[r12,#HwUartData]

;send reply

ldr

address

r15,=codeexeaddr

;jump to execution

LTORG

END

98

APPENDIX A–BOOT CODE

September 1997

PRELIMINARY DATA BOOK v2.0

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