Using the GNU Compiler Collection (GCC): PRU Pragmas

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#### 6.62.5 PRU Pragmas

`ctable_entry index constant_address`

  Specifies that the PRU CTABLE entry given by index has the value constant_address. This enables GCC to emit LBCO/SBCO instructions when the load/store address is known and can be addressed with some CTABLE entry. For example:

      /* will compile to "sbco Rx, 2, 0x10, 4" */
      #pragma ctable_entry 2 0x4802a000
      *(unsigned int *)0x4802a010 = val;