pruss_add.py File Reference

Example: minimal code for PRUSS firmware. More...

Go to the source code of this file.

Functions
def	pruss_add.load_firmware (IRam)
	Load firmware into PRUSS instruction ram. More...

Variables
	pruss_add.io = pruio_new(PRUIO_DEF_ACTIVE, 4, 0x98, 0)
	Create a ctypes pointer to the pruio structure.
	pruss_add.IO = io.contents
	The pointer dereferencing, using contents member.
int	pruss_add.pru_num = 0
	The PRU subsystem we use.
	pruss_add.pru_iram = PRUSS0_PRU0_IRAM
	The instruction ram ID of PRU subsystem.
	pruss_add.pru_dram = PRUSS0_PRU0_DRAM
	The direct access ram ID of PRU subsystem.
	pruss_add.pru_intr = PRU0_ARM_INTERRUPT
	The interrupt we use.
	pruss_add.dram = pointer(c_uint32(0))
	The pointer to the PRU direct access ram.

Detailed Description

Example: minimal code for PRUSS firmware.

This file contains an short and simple example for parallel usage of the other PRUSS. Find a functional description in section pruss_add.

Licence: GPLv3, Copyright 2018-2023 by Thomas{ doT ]Freiherr[ At ]gmx[ DoT }net

Run by: python pruss_add.py

Since

0.6.4

Definition in file pruss_add.py.

Function Documentation

load_firmware()

def pruss_add.load_firmware

(

IRam

)

Load firmware into PRUSS instruction ram.

Parameters

IRam	The IRam ID for the PRU to use

Returns

Zero on success, otherwise error raising

The instructions are compiled by command

pasm -V3 -c pruss_add.p

from source code (named pruss_add.p)

.origin 0
  LDI  r0, 0
start:
  LBBO r1, r0, 4, 16 // load parameters in r1 (start value), r2 (add value), r3 (count), r4 (interrupt)

  LOOP finished, r3.w0
  ADD  r1, r1, r2    // compute result
finished:

  SBBO r1, r0, 0, 4  // store result
  MOV  r31.b0, r4.b0 // send notification to host
  HALT
  JMP start

Definition at line 41 of file pruss_add.py.