TDA4VM: Byte alignment causes program crash during memcpy

Hongxiang LI

Part Number: TDA4VM

In R5F_MCU_0 core, i create a structure with a length of 7 (as shown below, sizeof( struct Test )=7 ). On line 20, memcpy() runs normally, But, on line 22, memcpy() causes the program to crash.

The address is in the region of shared memory between MCU and main domain. The region configuration is :

exeNeverControl=1: no instruction fetches enabled.

shareable=0: non-shared.

cacheable=FALSE: Memory region is non-cached.

How to solve this problem? In addition, when the length of the structure is 5 or 6, it runs normally.

over 1 year ago

0 Parth Nagpal over 1 year ago

TI__Mastermind 42135 points

Hi,

I tried the same code at my end and I don't see the crash.
Are there any other changes that you have done?

Regards,
Parth

0 Hongxiang LI over 1 year ago in reply to Parth Nagpal

Prodigy 10 points

Hello Parth,

The region configuration is as follows, and compiler optimization=3.

If I don't use this configuration, the address remains the same, it is normal.

{

/* Region configuration: 64 MB main mcu shared MEMORY */

.regionId = 9U,

.enable = 1U,

.baseAddr = 0xA4000000,

.size = CSL_ARM_R5_MPU_REGION_SIZE_64MB,

.subRegionEnable = CSL_ARM_R5_MPU_SUB_REGION_ENABLE_ALL,

.exeNeverControl = 1U,

.accessPermission = CSL_ARM_R5_ACC_PERM_PRIV_USR_RD_WR,

.shareable = 0U,

.cacheable = (uint32_t)FALSE,

.cachePolicy = CSL_ARM_R5_CACHE_POLICY_NON_CACHEABLE,

.memAttr = 0U,

Thanks,

Hongxiang

0 Parth Nagpal over 1 year ago in reply to Hongxiang LI

TI__Mastermind 42135 points

Hi,

Thanks for details, will try this on my end and get back.

Regards,
Parth

0 Karthikeyan S 4 months ago in reply to Parth Nagpal

TI__Genius 13250 points

Hi Hongxiang,

Is assistance still needed for this thread?

Regards,

Karthik

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TDA4VM: Byte alignment causes program crash during memcpy