| ??? 06/28/06 21:31 Read: times |
#119291 - code not working Responding to: ???'s previous message |
The code is not accepting more than 256 bytes, the ADDRS rolls over to 00h after 0ffh. Despite the change in RDCMD and WTCMD, the code only picks up 256 bytes. all subroutines work without any flaw.....the problem is in the main code.
;_________________________________________________________________ ;--------------------------MAIN CODE------------------------------ ;_________________________________________________________________ brw_main: mov sp,#64h mov p1,#0ffh mov ie,#00h acall s9k_main ;_________________________________________________________________ ;--------------------FULL WRITE SUBROUTINE------------------------ ;_________________________________________________________________ full_write: setb ROLLOVER ;indicates memory write into 1st half mov ADDRS,#00h mov WTCMD,#10100000B full_write_loop1: acall rx_main acall tx_main mov I2C_IN,a acall WRITE_iic inc ADDRS mov a,ADDRS cjne a,#0ffh,full_write_loop2 jnb ROLLOVER,overload mov WTCMD,#10100010B mov ADDRS,#00h clr ROLLOVER ;indicates memory write into 2nd half full_write_loop2: mov a,I2C_IN cjne a,#27,full_write_loop1 mov dptr,#disp_leadthrough_complete acall disp_message ;sjmp $ sjmp full_read ;delete this n enable previous inst ;_________________________________________________________________ ;-----------------MEMORY OVERWRITE PREVENTION--------------------- ;_________________________________________________________________ overload: mov dptr,#disp_overload acall disp_message sjmp $ ;_________________________________________________________________ ;--------------------FULL READ SUBROUTINE------------------------ ;_________________________________________________________________ full_read: mov ADDRS,#00h mov RDCMD,#10100001B mov dptr, #disp_executing_task acall disp_message full_read_loop1: acall READ_iic mov a,I2C_OUT lcall tx_main inc ADDRS mov a,ADDRS cjne a,#0ffh,full_read_loop2 mov RDCMD,#10100011B mov ADDRS,#00h full_read_loop2: mov a,I2C_OUT cjne a,#27,full_read_loop1 mov dptr, #disp_finish_read acall disp_message SJMP FULL_WRITE end |
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datasheet | 01/01/70 00:00 |