Using cognew more than once referencing the same DAT space
R Pankau
Posts: 127
Is this possible?·
for instance.·
· cog := cognew(@memory, 0)
· cog2 := cognew(@interrupt, 0)
I thought I was on to something when I put another ORG 0 just above the interrupt label and it worked but I think now everything above it is skipped.·· I can't use two ORG 0 directives in the same DAT can I?
So the real question is:· How can one start seperate cogs with different asm functions from a single Spin module?· I wanted to put a very simple routine in a cog to mimic a time interrupt like this.·
but I also would like the asm above it to continue to operate in a different cog.·
thanks.
for instance.·
· cog := cognew(@memory, 0)
· cog2 := cognew(@interrupt, 0)
I thought I was on to something when I put another ORG 0 just above the interrupt label and it worked but I think now everything above it is skipped.·· I can't use two ORG 0 directives in the same DAT can I?
So the real question is:· How can one start seperate cogs with different asm functions from a single Spin module?· I wanted to put a very simple routine in a cog to mimic a time interrupt like this.·
interrupt mov Time,cnt
add Time,timer1
again waitcnt Time,timer1
wrlong all_ones,ptr_int_flag
jmp #again
but I also would like the asm above it to continue to operate in a different cog.·
thanks.
Comments
As I explained in my Tutorial, ORG 0 just resets the internal counting of COG cells. That's all. Has nothing to do with memory allocation in the HUB, just with "counting numbers" in the COG. So it makes no sense at all to use anything else but ORG 0.
When use COGNEW it starts at the address you give loading whatever into the COG from the beginning.
It's all extraordinary simple!
In this thread Chip Gracy's message may·explain·using org. The propeller tool 1.05.7 in the downloads probably has this org embellishment and the $ operator, so don't download his program in this thread.
DAT memory org 0 or outa,SCL_mask 'set clock high or dira,SDA_mask 'SDA data always 0 or dira,SCL_mask andn dira,SDA_mask 'set data high mov mem_addr,#0 read_flags rdlong t1,ptr_pendwr test wrpnd_mask,t1 wc blah blah blah lots of asm... org 0 interrupt mov Time,cnt add Time,timer1 again waitcnt Time,timer1 wrlong all_ones,ptr_int_flag jmp #again▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
On the other hand you must not use any variables from the part after the second ORG in "memory" (of course).
Or post the full code...
or dira,SDA_mask 'SDA data always 0 or dira,SCL_mask andn dira,SDA_mask 'set data highThis looks funny.. Do you really want to output an SDA pulse of 100 ns? SDA is "pulled-down", I presume..
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Here is the code
·Sounds like I need to make my definitions in different places.· Am I incorrect in my assumption that all reserved words need to be at the end?· or is that just at the end of the respective code that will use it?· I put all definitions at the end of DAT for both routines.
DAT memory org 0 or outa,SCL_mask 'set clock high or dira,SDA_mask 'SDA data always 0 or dira,SCL_mask andn dira,SDA_mask 'set data high mov mem_addr,#0 read_flags rdlong t1,ptr_pendwr test wrpnd_mask,t1 wc 'if write is set the parity is odd and C will be set. 'rcl t2,#1 'move C into t2 if_c call #write rdlong t1,ptr_pendre test wrpnd_mask,t1 wc 'if read is set the parity is odd and C will be set. 'rcl t2,#1 if_c call #read jmp #read_flags '-------------------------------------------------------------------------------------------------------------- write rdlong data1,ptr_to_mem 'get data to write to memory {32 bits} store in t2 mov t2,data1 rdlong mem_addr,ptr_memaddr mov t1,mem_addr rol t1,#16 'get High byte of Mem address left justified mov t4,wrcont_byte 'put write control byte in pos for shifting. call #start call #cntrl_wr call #getack call #send_hi call #getack call #send_lo call #getack call #snd_data 'send first byte call #getack call #snd_data 'send second byte call #getack call #snd_data 'send third byte call #getack wrlong ack,ptr_ack call #snd_data 'send fourth byte call #getack call #stop wrlong all_zeroes,ptr_pendwr 'When finished writing clear write pending flag for SPIN add data1,#1 '****DEBUGGING CODE******************************* 'mov debug,ack '* '* 'mov debug,mem_addr '* 'wrlong debug,data '* '*****DEBUGGING CODE***************************** write_ret ret 'Write finished, return to calling routine '_________________________________________________________________________________________ read rdlong mem_addr,ptr_memaddr mov t1,mem_addr shl t1,#16 mov t4,wrcont_byte call #start 'START call #cntrl_wr 'CONTROL BYTE WRITE call #getack 'GET 256 ACK call #send_hi 'SEND HI ADDRESS BYTE call #getack 'GET 256 ACK call #send_lo 'SEND LO ADDRESS BYTE call #getack 'GET 256 ACK call #start 'START mov t4,recont_byte 'MOVE READ CONTROL WORD INTO POSITION call #cntrl_wr 'CONTROL BYTE READ call #getack 'GET 256 ACK call #get_data 'GET DATA BYTE call #sendack 'SEND ACK call #get_data call #sendack call #get_data call #sendack call #get_data call #stop 'NO ACK JUST STOP WHEN FINISHED. abA wrlong all_zeroes,ptr_pendre wrlong t4,ptr_from_mem read_ret ret '___________________________________________________________________________________________ '*****SEND START CONDITION****************** start andn dira,SDA_mask 'data 1 call #wait or outa,SCL_mask 'clock 1 call #wait or dira,SDA_mask 'data 0 call #wait call #wait andn outa,SCL_mask 'clock 0 call #wait call #wait start_ret ret '*****SEND CONTROL BYTE for WRITE OR READ ********************** cntrl_wr mov t5,#8 '8 bits will be shifted. wr_cont shl t4,#1 wc 'shift into C sending control byte to mem 'muxc outa,SDA_mask 'set SDA to state of C IF_C andn dira,SDA_mask IF_NC or dira,SDA_mask call #clock djnz t5,#wr_cont cntrl_wr_ret ret '*******SEND HIGH BYTE OF ADDRESS************** send_hi mov t5,#8 'reload to send address high byte. hi_byte shl t1,#1 wc 'shift high address to C 'muxc outa,SDA_mask 'set SDA to value of C IF_C andn dira,SDA_mask IF_NC or dira,SDA_mask call #clock 'clock out data bit djnz t5,#hi_byte send_hi_ret ret '*******SEND LOW BYTE OF ADDRESS*************** send_lo mov t5,#8 low_byte shl t1,#1 wc 'shift low byte address to C 'muxc outa,SDA_mask 'set SDA to value of C IF_C andn dira,SDA_mask IF_NC or dira,SDA_mask call #clock 'clock out data bit djnz t5,#low_byte send_lo_ret ret '******SEND DATA BYTE************************* snd_data mov t5,#8 'send 8 bits per byte datbyte shl t2,#1 wc 'shift data into C MSB first 'muxc outa, SDA_mask 'set SDA to value of C IF_C andn dira,SDA_mask IF_NC or dira,SDA_mask call #clock djnz t5,#datbyte 'loop 8 times for each byte snd_data_ret ret '--------------------------------------------------------------------------------------------------------------- '_____________________________________________________________________________________ ' GET DATA BYTE get_data andn dira,SDA_mask mov t5,#8 shftin or outa,SCL_mask call #wait mov t6,ina and t6,SDA_mask wc rcl t4,#1 'put input bit into C and shif to t4 LSB andn outa,SCL_mask call #wait call #wait djnz t5,#shftin 'or dira,SDA_mask get_data_ret ret '********************************************************************************** 'SEND ACK sendack or dira,SDA_mask 'set data to 0 'or dira,SDA_mask 'set data to output call #clock sendack_ret ret '*********************************************************************************** clock call #wait or outa,SCL_mask 'set clock hi call #wait andn outa,SCL_mask 'set clock low call #wait call #wait clock_ret ret '********************************************************************************** getack andn dira,SDA_mask 'data = input call #wait or outa,SCL_mask 'clock data from mem call #wait mov t6,ina 'get ack from mem and t6,SDA_mask 'just want SDA only andn outa,SCL_mask 'clock low test t6,all_ones wz 'should be Zero for ack if_z mov ack,#0 'ack of zero is evidence of active chip if_nz mov ack,#1 ' SDA line has 10k pullup. 'or dira,SDA_mask 'set data back to out call #wait call #wait getack_ret ret '************************************************************************************ wait mov Time,cnt add Time,Delay waitcnt Time,Delay wait_ret ret '************************************************************************************* '*************************************************************************************** stop or dira,SDA_mask 'data 0 andn outa,SCL_mask 'clock 0 call #wait or outa,SCL_mask 'clock 1 call #wait andn dira,SDA_mask 'data 1 call #wait call #wait call #wait call #wait stop_ret ret 'THIS RUNS IN A SEPERATE COG TO SIMULATE AN INTERRUPT EVERY 200,000 CYCLES OR 1/100 SECOND. interrupt 'org 0 mov Time,cnt add Time,timer1 again waitcnt Time,timer1 wrlong all_ones,ptr_int_flag jmp #again all_ones long $FFFFFFFF all_zeroes long 0 Delay long 14 'approx 700 nano-seconds Log_SCL long 26 Log_SDA long 27 ptr_to_mem long 0 ptr_from_mem long 0 ptr_pendwr long 0 ptr_pendre long 0 ptr_memaddr long 0 ptr_ack long 0 ptr_int_flag long 0 wrpnd_mask long %1 SCL_mask long %00000100_00000000_00000000_00000000 'P26 SDA_mask long %00001000_00000000_00000000_00000000 'P27 mem_addr long 0 wrcont_byte long %10100000_00000000_00000000_00000000 recont_byte long %10100001_00000000_00000000_00000000 timer1 long 200_000 '1/100 second 'Debugging variables hibyte long 0 lobyte long 0 data1 long $33779912 str1 byte "=control ",13,10,0 str2 byte "=Hibyte",13,10,0 str3 byte "=ack ",13,10,0 str4 byte "=data",13,10,0 t1 res 1 t2 res 1 t3 res 1 t4 res 1 t5 res 1 t6 res 1 b1 res 1 Time res 1 Debug res 1 ack res 1That will likely be your problem. The Cog addresses allocated to the data after the second ORG may well be the same as those used by code before that second ORG.
What you want is ...
DAT
ORG 0
First Assembler Code
Data associated with this Code
ORG 0
Second Assembler Code
Data associated with this code
Thanks!
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