commit 2a008be5630ea3fc3383bfed9f65e0065b0c3d33
Author: Wolfgang Hottgenroth <woho@hottis.de>
Date:   Fri Oct 4 07:28:32 2019 +0100

    initial

diff --git a/snippets/spi.py b/snippets/spi.py
new file mode 100644
index 0000000..3d0a8cc
--- /dev/null
+++ b/snippets/spi.py
@@ -0,0 +1,74 @@
+import struct
+import wiringpi
+import time
+
+
+
+def ISR():
+	wiringpi.digitalWrite(16, 1)
+
+
+
+wiringpi.wiringPiSetupGpio()
+SPIchan = 0
+SPIspeed = 1000000
+wiringpi.wiringPiSPISetup (SPIchan, SPIspeed)
+wiringpi.pinMode(16, wiringpi.OUTPUT)
+wiringpi.digitalWrite(16, 0)
+wiringpi.pinMode(19, wiringpi.INPUT)
+wiringpi.wiringPiISR(19, wiringpi.INT_EDGE_FALLING, ISR)
+
+
+
+clr_mdr0 = 0b00001000
+clr_mdr1 = 0b00010000
+clr_cntr = 0b00100000
+clr_str  = 0b00110000
+
+rd_cntr  = 0x60
+rd_otr  = 0x68
+
+rd_str = 0x70
+rd_mdr0 = 0x48
+rd_mdr1 = 0x50
+
+load_cntr2otr = 0b11100000
+
+
+def write(c):
+  buf = bytes([c])
+  retlen, retdata = wiringpi.wiringPiSPIDataRW(SPIchan, buf)
+
+def read5(c):
+  buf = bytes([c,0,0,0,0])
+  retlen, retdata = wiringpi.wiringPiSPIDataRW(SPIchan, buf)
+  v = struct.unpack('>I', retdata[1:])[0]
+  return v
+
+def read2(c):
+  buf = bytes([c,0])
+  retlen, retdata = wiringpi.wiringPiSPIDataRW(SPIchan, buf)
+  v = struct.unpack('>B', retdata[1:])[0]
+  return v
+
+
+
+#write(clr_mdr0)
+#write(clr_mdr1)
+#write(clr_cntr)
+
+
+write(clr_cntr)
+write(clr_str)
+
+
+while True:
+	x = read2(rd_str)
+	y = read5(rd_cntr)
+
+	print("{0} {0:#04x} {0:#010b}".format(x))
+	print(y)
+	print
+
+	time.sleep(1.0)
+
diff --git a/snippets/test1/test1 b/snippets/test1/test1
new file mode 100755
index 0000000..53b72c0
Binary files /dev/null and b/snippets/test1/test1 differ
diff --git a/snippets/test1/test1.c b/snippets/test1/test1.c
new file mode 100644
index 0000000..31a3069
--- /dev/null
+++ b/snippets/test1/test1.c
@@ -0,0 +1,17 @@
+#include <wiringPi.h>
+
+void isr() {
+	static int t = 0;
+	digitalWrite(16, t);
+	t = ! t;
+}
+
+
+int main (void) {
+	wiringPiSetupGpio() ;
+	pinMode(16, OUTPUT);
+	pinMode(19, INPUT);
+	wiringPiISR(19, INT_EDGE_FALLING, isr);
+
+	while(1);
+}