S32K中的主题 Re: how to place the function in a specified addrss

how to place the function in a specified addrss

oceansea — Mon, 21 Aug 2023 03:54:34 GMT

now , i have a problem ,i use S32K146 mcu and the S32DS IDE to development.

i want to place the function "vExt_UART0_transmit(unsiged char* buff)" in a specified address (0x20000),

i try to use the command __attribute__((at(0x20000))),but it seem have no any effect.

can you help me ,my friend.

haiyang

08 - 2023

Re: how to place the function in a specified addrss

danielmartynek — Mon, 21 Aug 2023 12:35:00 GMT

Hi @oceansea,

Create a new section in the linker file starting at 0x20000

And declare the function with this attribute to put func into m_text_2:

Regards,

Daniel

Re: how to place the function in a specified addrss

oceansea — Wed, 23 Aug 2023 09:28:21 GMT

hi,
thank you reply.
it's a solusion to solve this;
but when the requirements become complex,for example
we have 3 function need specified addrss,
"vExt_UART0_transmit(unsiged char* buff)" in (0x20000),
"vExt_UART1_transmit(unsiged char* buff)" in (0x20100),
"vExt_UART2_transmit(unsiged char* buff)" in (0x20200);
Then we should create 3 new section in the linker file ,it maby have some complicated.
Is there a simpler way?
thanks
oceansea

Re: how to place the function in a specified addrss

danielmartynek — Wed, 23 Aug 2023 11:43:32 GMT

Seems like there is no other option with GCC.

Regards,

Daniel