LPC MicrocontrollersのトピックRe: Which start address should have a bootable 32Mbit SPI flash?

Which start address should have a bootable 32Mbit SPI flash?

alexkovtun — Fri, 24 Mar 2017 08:41:25 GMT

Which start address should have a bootable 32Mbit SPI flash?

Re: Which start address should have a bootable 32Mbit SPI flash?

jeremyzhou — Tue, 28 Mar 2017 02:02:30 GMT

Hi Alex Kovtun ,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.

I was wondering if you can tell me which chip you use.

Have a great day.

Ping

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Re: Which start address should have a bootable 32Mbit SPI flash?

alexkovtun — Tue, 28 Mar 2017 05:39:10 GMT

Sorry, lpc1788.

Re: Which start address should have a bootable 32Mbit SPI flash?

alexkovtun — Tue, 28 Mar 2017 06:16:03 GMT

And, tell me, the function described in the file from NXP lpc177x_8x_ssp.c

uint16_t SSP_ReceiveData(LPC_SSP_TypeDef* SSPx)

Will it read the data in the size described in the settings SPI, or will it always return a 16-bit value?

Re: Which start address should have a bootable 32Mbit SPI flash?

jeremyzhou — Wed, 29 Mar 2017 02:09:54 GMT

Hi Alex Kovtun ,

Thanks for your reply and let me clarify it.

The LPC1788 hasn't the SPIFI module which is different with the SSP interface, in a word, you can run the code in the external flash via the SSP interface.

About the uint16_t SSP_ReceiveData(LPC_SSP_TypeDef* SSPx), I was wondering if you can exemplify the completely codes.
Have a great day,
Ping

Re: Which start address should have a bootable 32Mbit SPI flash?

alexkovtun — Wed, 29 Mar 2017 05:45:46 GMT

uint16_t SSP_ReceiveData(LPC_SSP_TypeDef* SSPx) {
return ((uint16_t) (SSP_DR_BITMASK(SSPx->DR))); }

I created code to run from external SSP(SPI) flash.

SPIFI memory mapped access space 0x2800 0000 - 0x28FF FFFF (UM10470, page 15)

What memory access space should I specify for SSP?

Re: Which start address should have a bootable 32Mbit SPI flash?

jeremyzhou — Fri, 31 Mar 2017 03:04:23 GMT

Hi Alex Kovtun,

1) What memory access space should I specify for SSP?

No, because the SSP interface can't access or utilize the QSPI device, and for the LPC178x/7x series, the SPIFI is available on the LPC1773 device only, in another word, the LPC1788 hasn't this address range.

Have a great day,
Ping

Re: Which start address should have a bootable 32Mbit SPI flash?

alexkovtun — Fri, 31 Mar 2017 13:35:14 GMT

We are talking about the SSP interface. The range for SPIFI is listed as an example!

I will repeat the question: what memory space can I use for SSP?

If you do not know, please do not answer.