Cortex M0 Memory Allocation to Store ADC Results in Assembly

[markjohnson9]

Posted on December 15, 2015 at 18:10

I am reaching out to see if someone can provide an assembly language example or preferred method on how to allocate or reserve 12 - 1/2 words in memory (RAM). My application requires the use of the internal ADC (12-Bit conversion) to convert and store 6-1/2 words of data every 2uSec, delay for 100uSec, the convert and store another 6-1/2 words of data without the use of the DMA. Then perform various processing functions on the 12 stored 1/2 word data (16 bits).

Right now I have the following Area statements I'm using for other parts of the algorithm.

  AREA vars, READWRITE   

FREQ DCB 0xE   

FRQPT DCB 0xE

FLAGS DCB 0x2   

      AREA asm, CODE, READONLY

FMIN EQU 0x4

FMAX EQU 0x1A

FTST EQU 0xE ;0x4(7.6MHz), 0xE(8.1MHz), 0x1A(8.7MHz)           

    EXPORT asmfunc

asmfunc

               Assembly code starts here...

#cortex-m0-memory-allocation

[Tesla DeLorean]

Posted on December 15, 2015 at 18:20

ADCBUFX FILL 12, 0, 2

ADCBUFY SPACE 24ADCBUFZ DCW 0,0,0,0,0,0,0,0,0,0,0,0

http://www.keil.com/support/man/docs/armasm/armasm_dom1361290007914.htm

[markjohnson9]

Posted on December 17, 2015 at 13:59

Thanks for your technological savvyness!