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AUSART problem ?

 
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imanjla
Guest
AUSART problem ?
PostPosted: Mon Feb 21, 2005 8:49 am     Reply with quote
Hi..I work on 16f877A about a year . and i dont know that it has AUSART for serial communication or USART . but in the device.h file i mean (16f877A.h) we have this :


Code:

////////////////////////////////////////////////////////////////// UART
// Constants used in setup_uart() are:
// FALSE - Turn UART off
// TRUE  - Turn UART on
#define UART_ADDRESS 2
#define UART_DATA    4
// TRUE  - Turn UART on




I cant undrestand the {setup_uart()} function and aslo its relation with

UART_ADDRESS and UART_DATA ? Can I use this with the chips that support AUSART?

Im so thankful if anybody help me through this ......


Ttelmah
Guest
PostPosted: Tue Feb 22, 2005 6:04 am     Reply with quote
There are some details in the current manual (get this from the website). The UART_ADDRESS instauction, only applies to chips with the EUART module, and allows the chip to automatically sit 'looking' for a byte with the 9th bit set to mark an address. The 16F877A does not have this ability, but the definitions have been added to a lot of the compiler .h files, presumably to allow code for the more sophisticated chips to actually compile (but not to work...).

Best Wishes
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