coralmw

Combining the red-pitaya-notes and the stock red pitaya FPGA bit file to create a suitable package to put on the red pitaya.

pretty much red-pitaya-notes (for the ubuntu os) + the FPGA from the stock os.

coralmw

http://fpga.org/2013/05/28/how-to-design-and-access-a-memory-mapped-device-part-one/

CMA: https://lwn.net/Articles/486301/

coralmw

OCM: 256kb of on-chip memory

?I think? it's called ps7_ram_1_S_AXI_BASEADDR in the linker scripts, but that does not work.

on boot, dmesg has zynq-ocm f800c000.ocmc: ZYNQ OCM pool: 256 KiB @ 0x5e880000
This address works. un-segmented.

#define COMM_BASE 0x5e880000

app_cpu1:

coralmw

no malloc, so no heap?

def. stack size: 0x2000 == 0.008 mb
sizeof(actionTable_t) == 20bytes
400ish entries if the stack was otherwise empty? a 1mb stack would allow for < 50000 entries
10mb stack space perhaps?

#### Monday

Expanded stack in the linkerscript to 0xA00000

coralmw

typedef struct actionTable {
	uint64_t nanos; // ulong max 4.9secs, ull max = 584 years
  XTime clocks;
	uint32_t pins;
  uint32_t a1;
  uint32_t a2;
} actionTable_t;

(XTime = u64)
niave assumption: that this is of size 8 + 8 + 4 + 4 + 4 = 28

coralmw

Unable to handle kernel paging request at virtual address 6528d77c
pgd = 5bbc0000
[6528d77c] *pgd=00000000
Internal error: Oops - BUG: 5 [#1] PREEMPT SMP ARM
Modules linked in: zynq_remoteproc remoteproc virtio virtio_ring
CPU: 0 PID: 1637 Comm: modprobe Not tainted 3.19.0-xilinx #1
Hardware name: Xilinx Zynq Platform
task: 5d65c580 ti: 5bb0a000 task.ti: 5bb0a000
PC is at put_pid+0x10/0x54
LR is at __fput+0x11c/0x1a8

coralmw

# curvefit .py Problem Sheet 5 example 
import numpy as np
from scipy.optimize import curve_fit 
import matplotlib.pyplot as plt
def func(x, a, b, c):
    return a*np.exp(-b*x) + c # function to generate data for curve fit
# The first part of this program generates a set of data that follows a particular functional form that allows us to test the curvefit routine
x = np.linspace(0, 4, 50)
y = func(x, 3.0, 1.3, 5)
yn = y + 0.2*np.random.normal(size=len(x)) # adding some noise to the data points

coralmw

"""Trivial app to change the volume of my denon reciever from my laptop.
"""

import telnetlib
import sys

if __name__ == "__main__":

    if len(sys.argv) < 2:
        print("""USAGE: dvol [0-100]""")

coralmw

(lambda __builtin__: (lambda __print, __y, __d: [[[[[[[[[[(lambda __after: (lambda __after: (lambda ___: __after(__d))(__print('Usage: python main.py inputfilename [outputfilename]')) if __d.len(__d.sys.argv)<=1 else [(lambda __after: [__after(__d) for __d.outfilename in [(__d.sys.argv[2])]][0] if __d.len(__d.sys.argv)>=3 else (lambda __after: [__after(__d) for __d.outfilename in [('.ol.py'.join(__d.infilename.rsplit('.py',1)))]][0] if '.py' in __d.infilename else [__after(__d) for __d.outfilename in [((__d.infilename+'.ol.py'))]][0])(lambda __d: (lambda ___: __after(__d))(__print(('Writing to %s'%__d.outfilename)))))(lambda __d: [[[[(lambda ___: (lambda __after: (lambda ___: (lambda ___: (lambda ___: (lambda ___: __after(__d))(__print(__d.onelined)))(__print('--- ONELINED ---------------------------------')))(__print(__d.original)))(__print('--- ORIGINAL ---------------------------------')) if __d.VERBOSE else __after(__d))(lambda __d: __after(__d)))(__d.outfi.write((__d.onelined+'\n'))) for __d.onelined in 

coralmw

import pylab
from Tkinter import *
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
from mpl_toolkits.mplot3d import Axes3D
from matplotlib import cm
import numpy as np

class ParticleMotion:
    def __init__(self, master):