PRU

# PRU - Memory Access using L3 and DDR

In this example, the PRU reads three values from external DDR memory and stores these values in shared L3 using programmable constant table entries. The example initially loads 3 values into the external DDR RAM. The PRU configures its Constant Table Programmable Pointer Register 1 (CTPPR_1) to point to appropriate locations in the DDR memory and the L3 memory. The values are then read from the DDR memory and stored into the L3 memory using the values in the 30th and 31st entries of the constant table.

See the PRU Software examples project in the SDK under example-applications. The source code for both the ARM and the PRU can be found there.

## You can find a more detailed description here: http://processors.wiki.ti.com/index.php/PRU_Linux-based_Example_Code