Re: [Sdcc-user] c8051f320 memory limit and compilers...

[Jesus Calvino-F. <Je...@ec...>]

Hi Bert,

Maybe I am wrong here, since I had not tested the resulting generated code,=
=20
but the size of USB_INT compiled with SDCC, according to the mem file is=20
less than 4k (3392 bytes):

C:\CYGNAL\Examples\C8051F32x\C\USB_INT\Firmware>type USB_MAIN.mem
Direct Internal RAM:
    Name             Start    End      Size     Max
    ---------------- -------- -------- -------- --------
    REG_BANK_0       0x00     0x07         8        8
    REG_BANK_1       0x08                  0        8
    REG_BANK_2       0x10                  0        8
    REG_BANK_3       0x18                  0        8
    BSEG_BYTES       0x20                  0       16
    DATA             0x08     0x3b        52      128
    ---------------- -------- -------- -------- --------
    TOTAL:           0x00     0x3b        60      128

Stack starts at: 0x3c (sp set to 0x3b) with 196 bytes available

Other memory:
    Name             Start    End      Size     Max
    ---------------- -------- -------- -------- --------
    INDIRECT RAM     0x80                  0      128
    EXTERNAL RAM     0x0000                0    65536
    ROM/EPROM/FLASH  0x0000   0x0d3f    3392    65536   <----- HERE

Maybe you are looking at the size of the ihx/hex file???  Remember that a=20
hex file encodes each byte as two characters, plus all the counters,=20
checksums, \n, \r, etc. which makes the file a lot bigger than the data it=
=20
represents.

Jesus

At 12:17 AM 8/6/2003 +0200, Bert wrote:
>Hi all,
>
>I have a question about Cygnal=92s C8051F320 USB microcontroller and=20
>SDCC/Keil compilers. When I look at the USB_INT example code that comes=20
>with the development board, the hex file is almost 16KB. Does this imply=20
>that the memory of the microcontroller is almost completely full with the=
=20
>USB code and that there is no space left for any other code? The really=20
>strange thing is that the Keil compiler that comes with the kit is limited=
=20
>to 4KB, but the hex file is 15KB=85 I must be missing something here? If=
 the=20
>memory is indeed full already, what are the options for expanding the=20
>memory or reducing program size? The hex file resulting when compiling=20
>with SDCC is pretty much the same size (the USB_INT SDCC port by Josh=
 Stone).
>
>Thanks in advance,
>
>Bert.
>
>PS: sorry if this is a little off-topic.