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 Forum: Programming   Topic: Let peripheral register word access

Posted: Wed Jul 06, 2016 2:16 pm 

Replies: 0
Views: 5708


For peripheral register, we usually define bitfield data struct for its elements, and define a global variable which use a pointer point to the base address. but sometimes peripheral register can only be read, write by 32 bit format, so we need avoid compiler to generate bit field access instruction...

 Forum: Programming   Topic: how to use madds64 instruction

Posted: Thu Jun 30, 2016 7:29 pm 

Replies: 0
Views: 5450


Andes madds64 instruction: [ madds64 Dt, ra, rb ] that multiply the signed integer contents of two 32-bit registers and add the multiplication result to the content of a 64-bit data register( Dx register ). Write the final result back to the 64-bit data register. you can check the NOD field of Misc....

 Forum: Programming   Topic: how to use mulr64 instruction

Posted: Thu Jun 30, 2016 6:04 pm 

Replies: 0
Views: 5198


Andes mulr64 instruction: [ mulr64 rt, ra, rb ] that multiply the unsigned integer contents of two 32-bit registers and write the 64-bit result to an even/odd pair of 32-bit registers. if you want to use this instruction, you can programming code as below: #include <stdio.h> #include <stdlib.h> long...

 Forum: AndeSight MCU/RDS   Topic: 如何將library file加入makefile dependency

Posted: Fri May 06, 2016 10:38 am 

Replies: 2
Views: 9187


about how to use the static library.

1: link the static library, in this case the library name is liblibzzz.a, so just type libzzz, just like if you want to link libm.a, you just need type m.

2: add the search path

Attachment:
library-search-path.png
library-search-path.png [ 66.97 KiB | Viewed 8136 times ]

 Forum: AndeSight MCU/RDS   Topic: Share the c file that use the static library

Posted: Wed Jan 28, 2015 6:21 pm 

Replies: 1
Views: 6974


let us see the building process.
it will like below
Attachment:
share-file.png
share-file.png [ 140.71 KiB | Viewed 6938 times ]

 Forum: Programming   Topic: disable ex9 optimization

 Post subject: disable ex9 optimization
Posted: Wed Jan 28, 2015 3:48 pm 

Replies: 0
Views: 6516


If you do not want to apply EX9 optimization at link time,
use “-Wl,--mno-ex9” (gcc as linker)or “--mno-ex9” (ld as linker) to disable it.

below show a example when gcc as linker
Attachment:
disable-ex9.png
disable-ex9.png [ 83.08 KiB | Viewed 6516 times ]

 Forum: BSP (Board Support Package)   Topic: let output normally at baudrate : 115200

Posted: Tue Jan 27, 2015 2:32 pm 

Replies: 1
Views: 6286


tiny modify current uart code to let output normally at baudrate : 115200
that's also work for buadrate 38400, 57600.
Attachment:
uart1.jpg
uart1.jpg [ 110.16 KiB | Viewed 6286 times ]


you can reference source code: uart.c from attached project.

 Forum: AndeSight MCU/RDS   Topic: Patch AndeSight 201 MCU or AndeSight 200 STD with BSP321

Posted: Thu Jan 22, 2015 3:41 pm 

Replies: 0
Views: 7404


How to patch AndeSight 201 MCU or AndeSight 200 STD with BSP321
Attachment:
bsp321-1.png
bsp321-1.png [ 235.59 KiB | Viewed 7404 times ]

 Forum: AndeSight MCU/RDS   Topic: export project

 Post subject: export project
Posted: Mon Jan 19, 2015 12:18 pm 

Replies: 0
Views: 7543


how to export project.
Attachment:
export.png
export.png [ 168.16 KiB | Viewed 7543 times ]

 Forum: Programming   Topic: specify an function to absolute address and LMA equ VMA

Posted: Mon Jan 12, 2015 12:14 pm 

Replies: 0
Views: 6233


specify an function to absolute address and LMA equ VMA c code: /* * patchprog.c * */ int func2(int) __attribute__ ((section (".FUNC_PATCH"))); int func2(int x){ return x*100; } int main() { func2(100); return 0; } sag code: USER_SECTIONS .FUNC_PATCH REG1 0x0 0x10000 { EXEC1 0x0 0x10000 { ...
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