SFR not included in comercial Chip

Yes.

The Keil C51 compiler has no inherent knowledge of the "standard" (or any other) SFR addresses - all it knows is what you tell it in your SFR definitions.

http://www.keil.com/support/man/docs/c51/c51_le_sfrs.htm

For "standard" chips, Keil supply headers with the appropriate definitions. There is nothing magic or special about these; they are just header files, the same as any other header files - so you can just create your own headers with your own "non-standard" definitions.

SFR LDO_CTRL = 0xC0;
SFR CH1 sfr = 0xC5;

Note the correct syntax here: http://www.keil.com/support/man/docs/c51/c51_le_sfr.htm - remember that 'C' (and, therefore, C51) is case-sensitive...

SFR_EXTRAS1.C(38): error C202: 'LDO_CTRL': undefined identifier

That's just telling you that you have not given any definition for 'LDO_CTRL' - it has nothing to do with SFRs

That refers specifically to the C51 Compiler - the A51 Assembler is different:

http://www.keil.com/support/man/docs/a51/a51_nomod51.htm

Hello Andrew,
I made some corrections in "hearder" file . Thanks for the guidance.
Interestingly, for some addresses of SFR had no problems, then a part of the header and Error Message.

At the end of this message is displayed error messages

Header:
LDO_CTRL sfr = 0xC0;
ENABLE1 sfr = 0xC1;
ENABLE2 sfr = 0xC2;
SYNTH1 sfr = 0xC3;
SYNTH2 sfr = 0xC4;
CH1 sfr = 0xC5;
sfr CH2 = 0xC6;
RX_F1 sfr = 0xC9;
RX_F2 sfr = 0xCA;
RX_P1 sfr = 0xCB;
RX_P2 sfr = 0xCC;
TRANSCEIVER_CTRL sfr = 0xCE;
sfr PSW = 0xD0;
TX_A1 sfr = 0xD1;
TX_A2 sfr = 0xD2;
I2CSM_SETUP sfr = 0xD8;
sfr ACC = 0xE0;
I2CSM_STATUS sfr = 0xE8;

Error Message
Hello Andrew,
I made some corrections in "hearder" Thanks for the guidance.
Interestingly, for some addresses of SFR had no problems, then a part of the header and source code.

At the end of this message is displayed error messages

Header:
LDO_CTRL sfr = 0xC0;
ENABLE1 sfr = 0xC1;
ENABLE2 sfr = 0xC2;
SYNTH1 sfr = 0xC3;
SYNTH2 sfr = 0xC4;
CH1 sfr = 0xC5;
sfr CH2 = 0xC6;
RX_F1 sfr = 0xC9;
RX_F2 sfr = 0xCA;
RX_P1 sfr = 0xCB;
RX_P2 sfr = 0xCC;
TRANSCEIVER_CTRL sfr = 0xCE;
sfr PSW = 0xD0;
TX_A1 sfr = 0xD1;
TX_A2 sfr = 0xD2;
I2CSM_SETUP sfr = 0xD8;
sfr ACC = 0xE0;
I2CSM_STATUS sfr = 0xE8;

Error Message
SFR_EXTRAS1.C(38): error C202: 'LDO_CTRL': undefined identifier
SFR_EXTRAS1.C(43): error C202: 'CH1': undefined identifier
SFR_EXTRAS1.C(44): error C202: 'CH2': undefined identifier
SFR_EXTRAS1.C(45): error C202: 'RX_F1': undefined identifier
SFR_EXTRAS1.C(46): error C202: 'RX_F2': undefined identifier
SFR_EXTRAS1.C(47): error C202: 'RX_P1': undefined identifier
SFR_EXTRAS1.C(48): error C202: 'RX_P2': undefined identifier
SFR_EXTRAS1.C(53): error C202: 'LDO_CTRL': undefined identifier

Piece of the Source Code :
"
while (1) { LDO_CTRL = 0X01; ENABLE1 = 0XFE; ENABLE2 = 0XFF; SYNTH1 = 0XFE; SYNTH2 = 0XFF; CH1 = 0XFE; CH2 = 0XFF; RX_F1 = 0XFE; RX_F2 = 0XFF; RX_P1 = 0XFE; RX_P2 = 0XFF; TRANSCEIVER_CTRL = 0XFE; TX_A1 = 0XFE; TX_A2 = 0XFF;
"

I'm sorry,
the reserved word "sfr" was mistakenly inserted after the name of the register SFR, but the header file this error does not occur.

Claudionor Santos

So, what are you saying?

Do not manually re-type code into your post - use copy-and-paste.

And pay attention to the instructions for posting source code:

www.danlhenry.com/.../keil_code.png

And pay attention to the 'Preview' to ensure that it's correct before you post it.

Andrew, thanks for the tips.

The errors presented in the messages have been corrected.

Thanks,
Claudionor.

Excellent!