Nano 100: Lower HEAP size for IAR

[deepikabhavnani]

Description

IAR 7.8 does not support dynamic heap, and some test/addition of new feature fail on this device because of less static RAM memory. Reducing the heap memory size for the same reason.

Pull request type

[X] Fix
[ ] Refactor
[ ] New target
[ ] Feature
[ ] Breaking change

@ccli8 @ccchang12

[0xc0170]

@ccli8 @ccchang12

Can you please review this change?

/morph build

[ccli8]

@deepikabhavnani I send another PR #6799 to spare more memory for your addition of new feature. Per our experience, some Greentea/CI tests would fail due to insufficient heap.

[mbed-ci]

Build : SUCCESS

Build number : 1896
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6768/

Triggering tests

/morph test
/morph uvisor-test
/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 1543
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/6768/

[mbed-ci]

Test : SUCCESS

Build number : 1713
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6768/1713

[deepikabhavnani]

@ccli8 - We have some devices with 0x1000 heap size and 0x400 stack size and looks like we didn;t had any issue with CI with heap change. Is it fine to go ahead with this change?

[ccli8]

@deepikabhavnani OK. Go with 0x1000 heap size and 0x400 stack size.

[ccli8]

@deepikabhavnani Correct above. Go with 0x1000 or 0x1200 heap size and 0x400 stack size only for IAR toolchain.