TMS570LS3137: Json library

Hi Fabio,

I never heard any such library for Hercules devices in the past.

Can you please explain more details about it?

what is this library and what do you want to do with it etc.

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Thanks & Regards,
Jagadish.

Hi Jagadish,

surely you are right!

Even though I didn't found anything in the TI CCS software repository.

I was speaking about this ...

TI Utilities API: JSON Parser/Builder

Thanks

Fabio

Many thanks for your detailed explanation.

I'm using cjson library and I-m having a problem but I think is a TMS570 problerm regarding some compiler or linker option.

The project is very easy coming from any example you can find on the net ...

The parser function is

void parse_json_config(const char *json_string) {

cJSON *json = cJSON_Parse(json_string);
if (json == NULL) {
const char *error_ptr = cJSON_GetErrorPtr();
if (error_ptr != NULL) {
fprintf(stderr, "Error before: %s\n", error_ptr);
}
return;
}

}

called in this way

parse_json_config(config);

where config is the json file string C converted like

const char *config = "{\"name\":\"John\"}";

If the config lenght is <= 512 bytes all works

If the config lenght is greater, the json parser return fail with the pointer error

is the byte 513

I tried to change heap and stack size in linker option (default is 0x800 for both) and I see some beaviour changing but always in fail

I tried also to change the allocation (static, const, global, initialized or not) but without any success.

Do you have any suggestions?

Thanks

Fabio

Hi Jagadish

probably is the same problem and probably I solved configuring heap size 0x18000.

Is there a maximun value for this configuration?

thanks

Fabio

Hi Fabio,

Fabio Poiati said:

Is there a maximun value for this configuration?

We can't tell exact maximum value for this configuration.

It is just depending on the size of the RAM in the device:

Apart from Stack and Heap the same RAM memory will be used for .bss and .data sections as well and their usage will be just depending on the application, i mean variables declared in application etc. 

So, it depends on your application usage of RAM.

--
Thanks & Regards,
Jagadish.

Hi Jagadish,

thanks for your feedback

Fabio