Assembly command note

 

The syntax of MOV can also be more complex as the following examples show.^[7]

MOV EAX, [EBX]	  ; Move the 4 bytes in memory at the address contained in EBX into EAX
MOV [ESI+EAX], CL ; Move the contents of CL into the byte at address ESI+EAX

 

Reference

[1] http://en.wikipedia.org/wiki/Assembly_language

Time Stamp

for keil compilar environment, they had a defination for time stamp, therefore we could use that to be a release note for product purpose.

how to use?

printf("%s %s",__DATE__,__TIME__);

or you could assign memory for them.

U8 KC_DATA Datestring[sizeof(__DATE__)];
U8 KC_DATA Timestring[sizeof(__TIME__)];


memcpy(Datestring, &__DATE__, sizeof(__DATE__));
memcpy(Timestring, &__TIME__, sizeof(__TIME__));

 

Reference

[1] http://www.keil.com/forum/2789/display-time-and-date/

compilar a specific memory address for variable and function

Compiler-specific Features [4]

function attributs

assign a section for place function code [1,2]

Variable attributs

locating a variable at absolute memory address [3]

Reference

[1] http://www.keil.com/support/man/docs/armccref/armccref_Cacbgief.htm

[2] http://www.keil.com/forum/13875/-at-for-function-address/

[3] http://www.keil.com/support/docs/2829.htm

[4] http://www.keil.com/support/man/docs/armccref/armccref_chdfijae.htm

Xmodem

Note,

there has three ways to sent file to destination with “Tera term”.

1. Checksum

128-byte packets

2. CRC

128-byte packets

3. 1k

1024-byte packets was the most popular such solution. In this case, the throughput at 9600 bit/s is 81%

lsz [2]

-vv verbose

-X xmodem

-k 1k

-b binary

 

Reference

[1] http://en.wikipedia.org/wiki/XMODEM

[2] https://opengear.zendesk.com/entries/22923362-Serial-port-file-transfer-using-X-Y-Zmodem

Declarations

C 99 provide programmer a way to save a memory space.

struct DM {

int x,

char* z[]

}

z just a label, compilar won’t allocate a memory for that, and this declaration only could put in last of structure declaration. therefore if we need to allocate a space for this structure when we need to store a data in variable z, otherwise we will assign wrong address which is next to variable x.

 

Reference

[1] C in a nutshell

Keil Firmware Binary

 

Normally, Keil will build the HEX file for Magic Flash to burn the code to MCU or .axf for mvisual.

but it’s not for binary code. therefore we need to using some ways to convert HEX to binary.

1.

C:\Keil\ARM\ARMCC\bin\fromelf.exe --bin --output=myprog.bin myprog.axf[1,2]

2.

C:\Keil\ARM\bin\ElfDwt.exe <filename>.axf BIN(<filename>.bin)[3]

 

and we could check the binary with application(AN11305)[4].

this software will check the signature at 0x1C, (43 f0 ff ef or charater Cðÿï )

Reference

[1]http://www.keil.com/support/docs/3213.htm

[2]http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/ka11291.html

[3]http://www.lpcware.com/content/blog/binary-file-creation-using-keil-mdk-toolchain

[4]http://www.lpcware.com/content/nxpfile/an11305-usb-system-programming-lpc11u3xlpc11u2x

Shortcut for common usage

 

To Manually Create Shortcuts

Environment Variables

%windir%\System32\rundll32.exe sysdm.cpl,EditEnvironmentVariables

device manager

devmgmt.msc

RunDll32.exe devmgr.dll DeviceManager_Execute

%windir%\System32\rundll32.exe shell32.dll,Control_RunDLL hdwwiz.cpl