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6.60.27 PRU Built-in Functions

GCC provides a couple of special builtin functions to aid in utilizing special PRU instructions.

The built-in functions supported are:

+Built-in Function: void __delay_cycles (constant long long cycles) +

This inserts an instruction sequence that takes exactly cycles cycles (between 0 and 0xffffffff) to complete. The inserted sequence may use jumps, loops, or no-ops, and does not interfere with any other instructions. Note that cycles must be a compile-time constant integer - that is, you must pass a number, not a variable that may be optimized to a constant later. The number of cycles delayed by this builtin is exact.

+
+Built-in Function: void __halt (void) +

This inserts a HALT instruction to stop processor execution.

+
+Built-in Function: unsigned int __lmbd (unsigned int wordval, unsigned int bitval) +

This inserts LMBD instruction to calculate the left-most bit with value bitval in value wordval. Only the least significant bit of bitval is taken into account.

+
+

+ © Free Software Foundation
Licensed under the GNU Free Documentation License, Version 1.3.
+ https://gcc.gnu.org/onlinedocs/gcc-13.1.0/gcc/PRU-Built-in-Functions.html +

+
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