test scripts to get raw files

src/python_tests/Makefile

@@ -2,7 +2,9 @@ PYTHONROOT=$(DESTDIR)/usr/local/bin
 OWN = -o root -g root
 INSTPYTHON = 0755
 #INSTALL = install
-PYTHON_SCRIPTS = tests.py
+PYTHON_SCRIPTS = tests.py \
+                 elphel_framepars.py \
+                 raw.py
 
 all:
 	@echo "make all in python_tests"

src/python_tests/elphel_framepars.py

+
+# Read frames' parameters. For Elphel NC393 cameras
+
+__copyright__ = "Copyright 2018, Elphel, Inc."
+__license__   = "GPL-3.0+"
+__email__     = "oleg@elphel.com"
+
+import mmap
+import struct
+
+class Pars:
+
+  # parameters
+  P_WOI_WIDTH  = 26
+  P_WOI_HEIGHT = 27
+  # ...
+  P_FRAME      = 136
+
+  # constants
+  ## frame params queue length
+  MAX_FRAMES = 16
+  ## 4 bytes per param
+  BYTE_MODE  = 4
+  ## params per frame from queue
+  PARS_SIZE   = 1024
+  ## all mem
+  MMAP_SIZE  = MAX_FRAMES*BYTE_MODE*PARS_SIZE # bytes
+
+  ENDIAN = "<" # little, ">" for big
+  FRMT_BYTES = {1:'B',2:'H',4:'L',8:'Q'}
+  FMT = ENDIAN+FRMT_BYTES[BYTE_MODE]
+
+  def __init__(self,filename=""):
+    with open(filename,"r+b") as fp:
+      self.data = mmap.mmap(fp.fileno(), self.MMAP_SIZE, offset = 0) # mmap all data
+
+  def value(self,param,frame):
+
+    offset  = (frame%self.MAX_FRAMES)*self.PARS_SIZE*self.BYTE_MODE
+    offset += (param%self.PARS_SIZE)*self.BYTE_MODE
+
+    data = self.data[offset:offset+self.BYTE_MODE]
+
+    res = struct.unpack_from(self.FMT,data)[0]
+
+    return res
+
+#MAIN
+if __name__ == "__main__":
+  print("Test")
+  a = Pars('/dev/frameparsall0')
+  print("  port 0, frame #:      "+format(a.value(Pars.P_FRAME,0),'#08x'))
+  print("  port 0, frame width:  "+format(a.value(Pars.P_WOI_WIDTH,0),'#08x'))
+  print("  port 0, frame height: "+format(a.value(Pars.P_WOI_HEIGHT,0),'#08x'))

src/python_tests/raw.py

+#!/usr/bin/env python
+
+from __future__ import division
+from __future__ import print_function
+
+# test and code samples related getting to raw pixels values
+
+__author__ = "Elphel"
+__copyright__ = "Copyright 2018, Elphel, Inc."
+__license__ = "GPL"
+__version__ = "3.0+"
+__maintainer__ = "Oleg K Dzhimiev"
+__email__ = "oleg@elphel.com"
+__status__ = "Development"
+
+import mmap
+import struct
+import os
+import sys
+import subprocess
+
+# globals
+MEMPATH  = "/sys/devices/soc0/elphel393-mem@0"
+VMEMPATH = "/sys/devices/soc0/elphel393-videomem@0"
+
+BUF_PRE = MEMPATH+"/buffer_pages_raw_chn"
+
+MEM_PRE    = VMEMPATH+"/membridge_start"
+VFRAME_PRE = VMEMPATH+"/video_frame_number"
+VMDEV_PRE  = "/dev/image_raw"
+# not used here
+MEMSTATUS  = VMEMPATH+"/membridge_status"
+
+# buffer size in 4k pages
+#   4096 equals 16MB
+# or just calculate based on image sizes
+
+BUF_SIZE = 4096
+
+# sbuf - buffer in system memory = cpu RAM
+# vbuf - buffer in fpga memory = video memory
+
+def set_sbuf_size(port):
+  cmd = "echo "+str(BUF_SIZE)+" > "+BUF_PRE+str(port)
+  subprocess.call(cmd,shell=True)
+
+def set_vbuf_position(port,pos):
+  cmd = "echo "+str(pos)+" > "+VFRAME_PRE
+  subprocess.call(cmd,shell=True)
+
+def copy_vbuf_to_sbuf(port,frame_number):
+  cmd = "echo "+str(frame_number)+" > "+MEM_PRE+str(port)
+  subprocess.call(cmd,shell=True)
+
+def save_pixel_array(port,fname):
+  cmd = "cat "+VMDEV_PRE+str(port)+" > "+fname
+  subprocess.call(cmd,shell=True)
+  print("Memory dumped into "+fname)
+
+
+# MAIN
+for i in range(2):
+  set_sbuf_size(i)
+  set_vbuf_position(i,0)
+  copy_vbuf_to_sbuf(i,0)
+  save_pixel_array(i,"/tmp/port"+str(i)+".raw")
+
+print("Now scp raw files to pc and run bayer2rgb\n")