Re: [lwip-users] altcp_tls_mbedtls

[Giuseppe Modugno]

Il 22/02/2019 09:54, Andy Pont ha scritto:
> Giuseppe wrote...
>
> > I'm trying to integrate lwip and mbedTLS on a project running on 
> > LPC1769 MCU from NXP. This MCU features 64kB SRAM in two separate 
> > banks of 32kB.
> I don’t have any particular experience of the lwIP + mbedTLS 
> combination that you are using and how to tune it but I have recently 
> been working on a similar sounding project using the LPC1768.

Didn't you use mbedTLS for your project?


> The way that the memory ended up being partitioned was:
>
> 16K @ 0x2007C000 (AHBSRAM0) - Ethernet send and receive buffers / 
> descriptors
> 16K @ 0x20080000 (AHBSRAM1) - Dedicated memory used for SSL
> 32K @ 0x10000000 (RAM) - System memory for remaining application
>
> We had to be careful in the memory management to make sure that when 
> memory was requested dynamically it was allocated from the right pool.
16kB for SSL? I understood this is too small. SSL requires at least 16kB 
for *only* input buffer. But you need output buffer too.