SDRAM and NOR Flash Sample / Reference code for Understanding the functionality

gauravmore — Tue, 19 Feb 2019 08:33:03 GMT

Hi Jeremy,

I am using LPC4367 controller with MCU Xpresso 10.3.0_2200. I am using SDRAM and NOR Flash interface in one of our projects. I was working with Evaluation board OM13088 but it that board no SDRAM and NOR flash interface is avialable. I am using SDRAM and NOR flash both interfaced with EMC lines aviable in LPC4367 controller.

I refered the code in e lpcopen_3_02_lpcxpresso_mcb4357 and also refered periph_memtest and misc_spifi_tst demos. But there is no EMC init routine avialable. Is there any sample code or a reference code for SDRAM with proper intitiatilization routine.

Also I want to allocate one of my Buffer to SDRAM address, I got the information related to it in MCU expresso User guie but still I want to know that as we use

__at(Address) attribute in Keil to allocate the array or a buffer like

uint16_t Buffer[1024] __at(0x28000000)

In the similar way, how we can use it in MCU Expresso . To conclude I want the sample or a reference code for SDRAM and NOR flash with proper EMC init routine which is not avaialable in the existing reference code

I need this since i want to test my development board which is ready. So please consider it on higher priority. Mean while i am trying to refere other forums as well for my understanding.

Thanks

Gaurav More

Re: SDRAM and NOR Flash Sample / Reference code for Understanding the functionality

jeremyzhou — Tue, 19 Feb 2019 11:18:15 GMT

Hi Gaurav More,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
As I mentioned before, the lpcopen_3_02_lpcxpresso_mcb4357 has provided the sample code for the SDRAM and Nor Flash interface, they're the periph_memtest and misc_spifi_tst demos (Fig 1).

Fig 1

During the startup process, MCU will execute the Board_SystemInit() (In the board_sysinit.c )prior to jumping to the main().

Fig 2

In the Board_SystemInit(), the Board_SetupExtMemory() will initialize the EMC module to manipulate the SDRAM.
The thread (Placing data into different RAM blocks )demonstrates how to place data into different RAM blocks.

Have a great day,
TIC

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SDRAM and NOR Flash Sample / Reference code for Understanding the functionality

Re: SDRAM and NOR Flash Sample / Reference code for Understanding the functionality