S32KのトピックRe: How to program UTEST when installing HSE on S32K358

How to program UTEST when installing HSE on S32K358

MarkFan — Tue, 30 Sep 2025 08:26:13 GMT

Hi ,

Background:
I successfully ran the S32K344_HSE_FW_INSTALL demo project and was able to program the UTEST area on the S32K344 using the PFLASH driver.

Example (S32K344):

/* Unlock UTEST data flash sector */
PFLASH_Unlock(PFLASH_BL5, PFLASH_SS0, PFLASH_S0);

/* Write in UTEST sector using main interface */
status = FLASH_Write((uint32_t*)UTEST_BASE_ADDRESS,
hseFwFeatureFlagEnabledValue,
sizeof(hseFwFeatureFlagEnabledValue));

Steps Tried on S32K358:
When moving to the S32K358, I switched to the C40 driver. The code I tried looks like this:

if (STATUS_C40_IP_SECTOR_PROTECTED == C40_Ip_GetLock(FLS_MAX_VIRTUAL_SECTOR)) {
C40_Ip_ClearLock(FLS_MAX_VIRTUAL_SECTOR, FLS_MASTER_ID);
}

C40_Ip_MainInterfaceWrite(UTEST_BASE_ADDRESS,
sizeof(hseFwFeatureFlagEnabledValue),
(uint8 *)(hseFwFeatureFlagEnabledValue),
FLS_MASTER_ID);

#define C40_UTEST_ARRAY_0_S000 (1040U) /* 0x1B000000 */

#define FLS_MAX_VIRTUAL_SECTOR 1039;

Issue:

On S32K358, I cannot find a clear mapping for C40_UTEST_ARRAY_0_S000.

Currently, the UTEST sector seems to be identified as FLS_MAX_VIRTUAL_SECTOR (1039), but I am unsure if this is correct.

The write operation to UTEST does not succeed.

Question:

What is the correct way to use the C40 driver API to program the UTEST area on S32K358?

Is there a specific configuration or sector mapping required for UTEST on S32K358 that differs from S32K344?

Thanks in advance for your support.

Best regards,
Mark

Re: How to program UTEST when installing HSE on S32K358

davidtosenovjan — Tue, 30 Sep 2025 18:31:23 GMT

UTEST sector definition is the same over all S32K3 family.

I would expect some sort of extra protection as UTEST is OTP memory.

Typically HSE FW is being installed by different method, for instance by debugger, but this options is possible as well, of course, but I haven't tested it until now.

Re: How to program UTEST when installing HSE on S32K358

MarkFan — Wed, 01 Oct 2025 08:25:42 GMT

Hi David,

Thanks for your reply.
I use SD3.5 with RTD 3.0 SDK

There is no UTest driver as you show on the screen.
How can I get this UTest driver?

Best regards,
Mark

Re: How to program UTEST when installing HSE on S32K358

davidtosenovjan — Wed, 01 Oct 2025 09:55:10 GMT

I see. Current version of RTD is 6.0.0. I would recommend to use current version.