How can I set and retrieve bitwise in uVision C? Similar to assembler P1.0 addresses Bit0 in Port P0. I could not find any possiblility to do so unless I take the usual Bitaddressing techniques (masking and shifting) Please answer to andreas.alef@web.de Regards, A. Alef
"How can I set and retrieve bitwise in uVision C? Similar to assembler P1.0 addresses Bit0 in Port P0." Look up the 'sbit' keyword in the manual. "Please answer to andreas.alef@web.de" No.
Thanks, but I didn't find it using the keyword sbit. "The sbit, sfr, and sfr16 data types allow you to access the special function registers that are available on the 8051. For example, the declaration: sfr P0 = 0x80; /* Define 8051 P0 SFR */" ok... but how do i address only one Bit like P0.0 = 1; or: P0_0 = 1;?
http://www.keil.com/support/man/docs/c51/c51_le_sbittype.htm Jon
sfr P0 = 0x80; sbit P0_0 = P0^0;
"Not sure if there's a way to access it as P0.0 or not." Not in C51. Note that it would generally be better to give the bit a more meaningful name than just "P0_0" - make it reflect the function of that bit; eg, door_open or tank_full
Note that it would generally be better to give the bit a more meaningful name than just "P0_0" - make it reflect the function of that bit; eg, door_open or tank_full Agreed. I was just reflecting the name he chose.
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