- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
"CYW20719 datasheet" says there is a 448KB-RAM in the chip.
I used a large array:
...
static uint8_t data[640*480];
...
The program was built and downloaded into CYW20719 normally (WICED-Studio-6.4).
But CYW920719Q40EVB-01 didn't run.
WICED-Studio-6.4 outputs:
--------------------------------------------------------------------------------
Patch code starts at 0x00270400 (RAM address)
Patch code ends at 0x0027A518 (RAM address)
Patch RW/ZI size 2572 bytes
Application starts at 0x002155FC (RAM address)
Application ends at 0x00261414 (RAM address)
Patch code size 41240 bytes
Application RAM footprint 310808 bytes
------
Total RAM footprint 313380 bytes (306.0kiB)
--------------------------------------------------------------------------------
If I canceled “static uint8_t data[640*480]”, CYW920719Q40EVB-01 started correctlly.
WICED-Studio-6.4 outputs:
--------------------------------------------------------------------------------
Patch code starts at 0x00270400 (RAM address)
Patch code ends at 0x0027A518 (RAM address)
Patch RW/ZI size 2572 bytes
Application starts at 0x002155FC (RAM address)
Application ends at 0x0021639C (RAM address)
Patch code size 41240 bytes
Application RAM footprint 3488 bytes
------
Total RAM footprint 6060 bytes (5.9kiB)
--------------------------------------------------------------------------------
Best regards.
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Per our test on other devices, you can't use all the RAM memory in your application.
Please refer to the following screen shoot for the document.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
The stack and initial code will also load to the RAM during the startup. You may refer to the following blog for the RAM memory map: BCM20732 Memory Map Architecture
It is for the BCM20732, CYW20719 shares the similar structure.
We don't have a specific value for the avaliable RAM size for the application. You can use the API UINT32 mpaf_cfa_mm_MemFreeBytes(void); to check the free bytes of the memory.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
Re: CYW20719: Large build size said "Nearly 370k can be used for application code." Is this correct?
And “If in case your code size is more and you want to run the application code from flash, you can use XIP (Refer WICED-XIP-Application-Support-Guide.pdf from doc folder of WICED Studio )”.
Unfortunately, I didn't find this pdf. Would you please give me a link?
Furthermore, I didn't find "API UINT32 mpaf_cfa_mm_MemFreeBytes(void)" in "Cypress WICED Studio API Reference Guide v6.2.0.pdf".
Best regards.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Per our test on other devices, you can't use all the RAM memory in your application.
Please refer to the following screen shoot for the document.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
Thank you so much for you patience!
"Execute-in-Place (XIP) Application Support Guide.pdf" says "By placing the application and the profile library code in flash, the application can save SRAM space."
"__attribute__((section(“.text”)))" can really place application code in flash.
And how to place the profile library code in flash?
Best regards.