SRAM of STM32 Mikromedia M4 is 192Kbyte but MikroC didn't

[umut3502]

I have a STM32F M4 Mikromedia.

it says that STM32F407VGT6 has up to 192+4 Kbytes of SRAM in the datasheet

but when I programmed STM32F M4 Mikromedia as a maximum, mikroC shows in the section view/statics/RAM memory Usage/data that max 132Kbyte. But I need 192 Kbyte Data Ram. why is mikroC showing this as 132Kbyte?

is there any problem in the compiler?

please help me.

[filip]

Hi,

The STM32F407VG has following amount of RAM memory :

Up to 192+4 Kbytes of SRAM including 64-Kbyte of CCM (core coupled memory) data RAM

The core coupled memory isn't directly accessible as standard SRAM, you will need to use ccm memory type specifier to allocate variables in this memory.

Please, see Memory Type Specifiers topic in the help file for more information.

Regards,
Filip.

[umut3502]

I can use

code char picture[1000000] => This is ROM memory 1 Mbyte

data char [132000] => This is SRAM I can use 132Kbyte

but 192Kbyte you said

where is 60KByte?

rx and sfr is already small memory isn't it?

For eaxample;
I tried that:

data double V[100][100]; => 100*100=10000 double so 10000*4=40000 byte =40Kbyte
data double R[100][100]; => 40Kbyte
data double L[100][100]; => 40Kbyte
data double M[100][100]; => 40Kbyte

total is 160 Kbyte but compiler said that " out of memory"

I didn't understand

ROM is OK 1 MByte This is code

but why is data 132Kbyte? Data must be 192Kbyte.

when I controlled STM32F M3 mikromedia, this is true 132Kbyte but STM32F M4 mikromedia isn't
Moreover, I controlled Sterillas mikromedia that is true, too.

Thank you for your helping now

[filip]

Hi,

As I said in my previous post, the 64 KB that is missing is a so called Core Coupled Memory and isn't directly accessible and mapped in general purpose RAM,
you can access it only via the ccm memory specifier.

Regards,
Filip.

[umut3502]

I have MikroC 2.5 version, because of this I didn't show it

thank you for helping me.

I will try "ccm"