LPC MicrocontrollersのトピックRe: Internal Flash utilization for External Memory

Internal Flash utilization for External Memory

Dhaya — Fri, 03 Mar 2023 11:35:09 GMT

Hi,

We are trying to utilize internal ROM Flash memory for the purpose of secondary memory (instead of EEPROM) in LPC 1768, LPC 55S16. Is it possible to utilize FLASH for secondary memory and if possible how we can use. Kindly guide us to achieve on this

Re: Internal Flash utilization for External Memory

ZhangJennie — Mon, 06 Mar 2023 06:56:56 GMT

I am not sure if I understand your question. Could you please be more specific?

Thanks,

Jun Zhang

Re: Internal Flash utilization for External Memory

Dhaya — Fri, 10 Mar 2023 09:57:02 GMT

Hi,

We are try to store the calibration data in internal memory. We using LPC55S16 hence there is no EEPROM. We need almost 300 Bytes of storage. Hence we reviewed some websites to store those data in internal memory.

https://mcuoneclipse.com/2014/05/31/configuration-data-using-the-internal-flash-instead-of-an-external-eeprom/

Here we reviewed that use Internal FLASH memory instead of EEPROM.

Kindly guide that how to use internal FLASH memory as EEROM storage

Re: Internal Flash utilization for External Memory

Dhaya — Fri, 10 Mar 2023 11:21:55 GMT

Also Kindly update how to Read and write Flash during run time. Or it makes some issues on controller / life time ,etc,.

Re: Internal Flash utilization for External Memory

ZhangJennie — Fri, 10 Mar 2023 12:14:40 GMT

Hi Dhaya

Under MCUXpresso SDK folder, there is demo code iap_flash. I suggest you referring it.

This demo code erases and programs a portion of on-chip flash memory. A message a printed on the UART terminal as various operations on flash memory are performed.

Hope this helps,

Jun Zhang

Re: Internal Flash utilization for External Memory

Dhaya — Fri, 17 Mar 2023 12:43:04 GMT

Thanks for the support. I taken the driver file from fsl_iap.h and fsl_iap.h. I need to save a particular a data byte in internal Flash memory during run time and read data from this. But i could not able to find the difference. How i store data in run time and how to read in Flash. Also i didn't found any register to reconstruct it. hereby i attached images kindly guide to save external data

Re: Internal Flash utilization for External Memory

ZhangJennie — Mon, 20 Mar 2023 03:43:59 GMT

For Internal Flash, in fsl_iap, there is FLASH_Program(), we can use it to store date in run time.

Please execute FLASH_Erase() then FLASH_Program()

fsl_iap doesn't work for external Flash. What external Flash interface?

Re: Internal Flash utilization for External Memory

Dhaya — Mon, 20 Mar 2023 05:10:24 GMT

No, we are using internal Flash only

Re: Internal Flash utilization for External Memory

Dhaya — Mon, 20 Mar 2023 05:12:32 GMT

Thanks for your reply. Also kindly guide, how we can assign address for the respective data since the program memory may take that address. How we can set the range for program memory?

Re: Internal Flash utilization for External Memory

ZhangJennie — Mon, 20 Mar 2023 06:11:28 GMT

Please take a look at the Flash program and erase functions. the second parameter is the destination address you want to handle with.

Re: Internal Flash utilization for External Memory

Dhaya — Sat, 01 Apr 2023 06:10:28 GMT

Hi @ZhangJennie,
Thanks for your support. As per the data, its works well. Thanks a lot

Re: Internal Flash utilization for External Memory

Dhaya — Sat, 01 Apr 2023 06:13:54 GMT

Currently we are analyzing of cycle of read/write on flash IAP. Can you tell about read/write life cycle of LPC55S16 flash