topic Re: MPC5777CEVB External SRAM test example in MPC5xxx

MPC5777CEVB External SRAM test example

1620773328 — Thu, 11 Jun 2020 02:27:15 GMT

Hello，

We are using MPC5777CEVB and MPC57XXMB.

IDE : s32ds for Power Architecture

OS ： Windows 10

Is there any External SRAM test example running on 32ds for Power Architecture？

Regards，

Jinus

Re: MPC5777CEVB External SRAM test example

davidtosenovjan — Thu, 11 Jun 2020 15:41:29 GMT

Unfortunately not. But it should not be difficult to port it as the whole setting in located in main.c file.

Re: MPC5777CEVB External SRAM test example

1620773328 — Sun, 14 Jun 2020 11:44:08 GMT

Hi David,

Thanks for your reply.

I tried to port the example you mentioned to s32，It does not work as expected.

IDE : S32DS for Power Architecture

OS : windows10

Project : freertos_mpc5777c example project in S32SDK for Power Architecture

My steps as flow:

1. Change J4 to choose CS0

2. Config MMU Registers in file startup_MPC5777C.s

3. Modify SRAM Init function

4. Run to check

It does not work as expected.

Regards,

Jinus

Re: MPC5777CEVB External SRAM test example

davidtosenovjan — Mon, 15 Jun 2020 09:21:23 GMT

Could you show me MMU table sccrenshot as follows?

Re: MPC5777CEVB External SRAM test example

1620773328 — Tue, 16 Jun 2020 02:16:52 GMT

Hi David,

Thanks.

I don't know where i can find this tool. I am sorry.I only have startup_MPC5777C.S file.

MMU configuration shows blow:

#if defined(MMU_CONFIG)
;#****************************** MMU configuration ********************************
#TLB1 = internal flash @ 0x0000_0000, VLE
e_lis r3,0x1001
mtspr 624,r3
e_lis r3,0xC000
e_or2i r3,0x0700
mtspr 625,r3
e_lis r3,0x0000
e_or2i r3,0x0020
mtspr 626,r3
e_lis r3,0x0000
e_or2i r3,0x003F
mtspr 627,r3
msync # Synchronize in case running from flash
tlbwe
se_isync # Synchronize in case running from flash

#TLB3 = internal SRAM @ 0x4000_0000, VLE, Write-Through Cache
e_lis r3,0x1003
mtspr 624,r3
e_lis r3,0xC000
e_or2i 3,0x0480
mtspr 625,r3
e_lis r3,0x4000
e_or2i r3,0x0030
mtspr 626,r3
e_lis r3,0x4000
e_or2i r3,0x003F
mtspr 627,r3
msync # Synchronize in case running from SRAM
tlbwe
se_isync # Synchronize in case running from SRAM

#TLB0 = pbridgeB @ 0xFFE0_0000, Cache inhibited, Guarded
e_lis r3,0x1000
mtspr 624,r3
e_lis r3,0xC000
e_or2i r3,0x0580
mtspr 625,r3
e_lis r3,0xFFE0
e_or2i r3,0x000A
mtspr 626,r3
e_lis r3,0xFFE0
e_or2i r3,0x003F
mtspr 627,r3
tlbwe

#TLB2 = external bus @ 0x2000_0000, VLE
e_lis r3,0x1002
mtspr 624,r3
e_lis r3,0xC000
e_or2i r3,0x0980
mtspr 625,r3
e_lis r3,0x2000
e_or2i r3,0x0038
mtspr 626,r3
e_lis r3,0x0000
e_or2i r3,0x003F
mtspr 627,r3
tlbwe

#TLB4 = pbridgeA @ 0xC3E0_0000, Cache inhibited, Guarded
e_lis r3,0x1004
mtspr 624,r3
e_lis r3,0xC000
e_or2i r3,0x0580
mtspr 625,r3
e_lis r3,0xC3E0
e_or2i r3,0x000A
mtspr 626,r3
e_lis r3,0xC3E0
e_or2i r3,0x003F
mtspr 627,r3
tlbwe

#TLB5 = 4k stack for each core (will be locked in cache)
# (Note: located just after 512k TLB3 entry for SRAM)
e_lis r3,0x1005
mtspr 624,r3
e_lis r3,0xC000
e_or2i r3,0x0180
mtspr 625,r3
e_lis r3,0x4008
e_or2i r3,0x0000
mtspr 626,r3
e_lis r3,0x4008
e_or2i r3,0x003F
mtspr 627,r3
tlbwe

#endif

Regards,

Jinus

Re: MPC5777CEVB External SRAM test example

davidtosenovjan — Tue, 16 Jun 2020 13:14:22 GMT

I have just shared example code prepared with Design Studio. it works fine.

You can download it here:

Example_MPC5777C-External_SRAM-test-S32DS.Power.2017.R1

Re: MPC5777CEVB External SRAM test example

1620773328 — Wed, 24 Jun 2020 07:00:47 GMT

Problem solved. Thanks very much!!