Bit nomenclature

[LGR]

When addressing a peripheral bit, the way Microchip names bits and the way Mikroelektronika implements them doesn't make sense. Here's an example:

Each UART has a status register named UxSTA; i.e. UART 1 has U1STA, UART 2 has U@STA, etc. Inside of that registers are bits with names, such as UxSTA.4 = RIDLE, UxSTA.3 = PERR, etc. If I type RIDLE or RIDLE_bit into mPascal, the identifiers are recognized, even though there is one per UART! If I try something like U1RIDLE, it's not recognized.

How is this supposed to work? How to I address these bits and the specific peripheral other than doing what I've been doing, and calling them U1STA.4, U2STA.4, etc.? Do RIDLE and PERR, etc. refer to UART 1 only?

[filip]

Hi,

If you look at the definition file of the PIC32 MCU, you can see how the individual bits are implemented :

Code: Select all

    var   RIDLE_bit : sbit at U1STA.B4;
    var   PERR_bit : sbit at U1STA.B3;

    var   RIDLE_U2STA_bit : sbit at U2STA.B4;
    var   PERR_U2STA_bit : sbit at U2STA.B3;

    var   RIDLE_U5STA_bit : sbit at U5STA.B4;
    var   PERR_U5STA_bit : sbit at U5STA.B3;

The RIDLE_bit and PERR_bit refer only to the UART1 module.
The RIDLE and PERR bits that belong to other UART modules have the name as in the example above.

Regards,
Filip.