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FIELD UPDATES FOR FLASH BASED ST7 APPLICATIONS USING A PC COMM PORT

ld {loadaddress+1},a

; low byte of load address

saved

clr x

b002:

cp x,bytecount

jreq b003

call getbinary

ld (flashbuffer,x),a

inc x

jrt b002

b003:

call getbinary

ld checksum,a

; checksum for line saved

call RAMCODE

waitforcr:

call waitforchar

cp a,#13

jrne waitforcr

jrt b001

gots9:

call waitforchar

cp a,#13

jrne gots9

bset WDGCR,#7

; force a cold reset by starting watchdog

bres WDGCR,#6

; and then sitting in an endless loop

gots9A:

jrt gots9A; endless loop waiting for watchdog to

;

force a reset

;****************** bank zero subroutines *************************

waitforchar:

btjf SCISR,#5,waitforchar

ld a,SCIDR

ld SCIDR,a

; echo character

ret