Multiple DAT sections
David Betz
Posts: 14,516
Starting to work on PropGCC cache drivers again and I have a PASM question. What happens if I have a program structured like this:
Am I guaranteed that the code in the second DAT will immediately follow the code from the first DAT in memory? I'm trying to factor out common code from the cache drivers so I can use #include to add it to cache drivers that need it rather than duplicating the same code in each driver but some of the code snippets require a CON section to setup constants. Is it poor coding practice to assume that the DAT sections will be contiguous?
CON ' some constants DAT ' some code CON ' some more constants DAT ' some more code
Am I guaranteed that the code in the second DAT will immediately follow the code from the first DAT in memory? I'm trying to factor out common code from the cache drivers so I can use #include to add it to cache drivers that need it rather than duplicating the same code in each driver but some of the code snippets require a CON section to setup constants. Is it poor coding practice to assume that the DAT sections will be contiguous?
Comments
Var does get reorganized though..
This is good to hear since I have been contemplating putting CON and DAT sections in individual PRI and PUB sections so I can paste them in (or #include them) as needed.
Here is a clean solution for beginners.
There should be only one DAT section.
Each cog you are are going to start starts with org 0 and ends with FIT.
All the code for each cog
All variables for that cog and
All constants for that cog
have to be between the org 0 and FIT for that cog.
Here is some code and notes that clarifies and demonstrates this {copied from the book}
[COLOR=#000000][FONT=Parallax, monospace][SIZE=3]{{-------------------------------------------------------------------------------[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]PASM_BookTestFiles123.SPIN [/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Function of program[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Three objects write three variables to HUB memory[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]SPIN code reads and displays the values.[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Other Objects are TestFile2 and TestFile3[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Uses PST to display data, Header and three items[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Connections are as follows[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]None[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Program PASM_BookTestFiles123.SPIN[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Book PASM for beginners, Propeller 102[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Section Outputs[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Programmer Harprit Sandhu [/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Date Feb 10 2013[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Revisions: Report errors to harprit.sandhu@gmail.com[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]-------------------------------------------------------------------------------}}[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]CON[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]_clkmode = xtal1 + pll16x[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]_xinfreq = 5_000_000[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]bits = 32[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]Vars = 3[/SIZE][/FONT][/COLOR] [COLOR=#000000] [/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]VAR[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]long P_Val[4][/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]byte pot_sub[/SIZE][/FONT][/COLOR] [COLOR=#000000] [/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]OBJ[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds : "FullDuplexSerial"[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]TF2 : "TestFile2"[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]TF3 : "TestFile3"[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]PUB Go|clear[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]fds.start(31,30,0,115200) 'start console at 115200 for debug output[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]main 'call main[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]waitcnt(clkfreq/4 +cnt) 'wait for all to start up[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]repeat 'endless loop[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]pot_sub:=0 'reset id of pot to be printed[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.tx($1) 'home to 0,0[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.str(string("Display results")) 'header [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.tx($d) 'new line [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.tx($d) 'new line[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]repeat Vars 'loop to display data[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.bin(P_val[pot_sub], bits) 'print to the PST in binary[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.str(string(" ")) 'two spaces to erase old data overflow[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.dec(P_val[pot_sub]) 'print value as decimal value [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.str(string(" ")) 'two spaces to erase old data overflow [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.dec(pot_sub) 'print value as decimal value[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.str(string(" ")) 'three spaces to erase old data overflow[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]pot_sub:=(pot_sub)+1 'increment display counter [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.tx($d) 'new line[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]waitcnt(clkfreq/60+cnt) 'flicker free wait [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]clear:=clear+1 'increment counter. This routine clears up screen[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]if clear>10 'decision point by erasing extra lines of bot[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]fds.tx(16) 'clear screen of PST display every 10 loops[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]clear:=0 'reset counter Only really needed once.[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]PUB Main [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]Cog1(@P_Val) 'call Cog1[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]Cog2(@P_Val) 'call Cog2[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]Cog3(@P_Val) 'call Cog3[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]PUB Cog1(address) 'Pass address[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]cognew(@Cog_1, address) 'use address to start Cog[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]PUB Cog2(address)[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]cognew(@Cog_2, address)[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]PUB Cog3(address)[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]cognew(@Cog_3, address)[/SIZE][/FONT][/COLOR] [COLOR=#000000] [/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]DAT org 0[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Cog_1[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]loop mov mem, par 'Read Par[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]wrlong one, mem 'Write long[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]jmp #loop 'repeat[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]'constants and variables[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]one long 111[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]mem res 1[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]fit[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]'=========================[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]org 0[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Cog_2 [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]mov mem2, par 'Read Par[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]add mem2, #4 'add 4 to address[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]loop2 wrlong two, mem2 'Write long [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]jmp #loop2 'repeat [/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]'constants and variables[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]two long 222[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]mem2 res 1[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]fit[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]'=========================[/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]org 0[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]Cog_3 [/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]loop3 mov mem3, par 'Read Par [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]add mem3, #8 'add 8 to address [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]wrlong three, mem3 'Write long [/SIZE][/FONT][/COLOR] [COLOR=#000000] [FONT=Parallax, monospace][SIZE=3]jmp #loop3 'repeat [/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]'constants and variables [/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]three long 333[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]mem3 res 1[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Parallax, monospace][SIZE=3]fit[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Arial, sans-serif][SIZE=3][B]Program 3[/B][/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Arial, sans-serif][SIZE=3][B]Displays three variable stored from three separate Objects on the PST[/B][/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Arial, sans-serif][SIZE=3]The program TestFile1 displays three variables read from the PAR parameter offset locations in HUB. It starts the first PASM program that stores a 111 in the first PAR parameter location. It then starts programs TestFile2 and TestFile3.[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Arial, sans-serif][SIZE=3]The program TestFile2 stores a 222 at the second PAR offset parameter location[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Arial, sans-serif][SIZE=3]The program TestFile3 stores a 333 at the third PAR offset parameter location[/SIZE][/FONT][/COLOR] [COLOR=#000000][FONT=Arial, sans-serif][SIZE=3]We have three PASM methods that store three variables per the PAR offset parameter in HUB memory. The top SPIN program reads and displays them on the PST. (There are 4 cogs in operation here) [/SIZE][/FONT][/COLOR]erase the notesRun the code
Watch on PST.
Harprit
And you cannot use the same variable names and constant names in more than one cog
All variables and constants have to have unique names between cogs except the shared
variables that are NOT even mentioned in the PASM code. They are accessed via the PAR
parameter and are never mentioned by name in any of the PASM code!!!
You wiii also need test file 2 and 3 in your working folder
Here they are
testfile2
{Program TestFile2 ' } ' CON ' _clkmode = xtal1 + pll16x ' _xinfreq = 5_000_000 ' ' PUB Cog2(address) ' cognew(@C_og2, address) ' DAT org 0 ' C_og2 ' loop mov mem, par ' add mem, #4 'Add 4 to second location in HUB memory wrlong two, mem 'Store value of 8 i location 2 i HUb Mem add two, #2 'increment value by 2 jmp #loop 'loop back two long 8 'Second value is set to 8 mem res 1and testfile3
{Program TestFile3 ' } ' CON ' _clkmode = xtal1 + pll16x ' _xinfreq = 5_000_000 ' ' PUB Cog3(address) ' cognew(@C_og3, address) ' DAT org 0 ' C_og3 ' loop mov mem, par ' add mem, #8 'Add 8 to access 3rd value in HUB wrlong three, mem 'Store 500 in location 3 in Hub Mem add three, #4 'increment value by 4 jmp #loop 'loop back three long 500 'assign value of 500 mem res 1 'Kuroneko
there is one extra space on all the lines
I don't know why it did that
The are easily selected in one sweep with the Alt key down and removed
My Apologies.
H
Good answer to a different question.
So, it turns out I don't even understand the questions yet....
Life continues to blow me away.
Getting old.
H