Got the problems sorted
On 2014-06-30 18:50, Marius Liebenberg wrote:
> Has anybody used this work lately. I used it a long time ago with no
> problems but now I cannot get the device to communicate to the python
> script. The Arduino compiler has upgraded a lot since the release of
> this work and some functions are deprecated or no longer supported. I
> changed the Snippet
>
> Serial.print((v >> 7) | 0x80, BYTE);
> to
> Snippet Serial.write((v >> 7) | 0x80);
>
> but the python script does not see the start byte at all.
>
> The Arduino Code
>
> Snippetvoid setup() {
> Serial.begin(9600);
> }
>
> uint8_t adc=0;
> uint8_t firstbyte=0;
> uint8_t pinmap[6] = {2,4,7,8,12,13};
> uint8_t dacpinmap[6] = {3,5,6,9,10,11};
> void loop() {
> while(Serial.available())
> {
> uint8_t byte = Serial.read();
> if(((firstbyte & 0x80) == 0x80) && ((byte & 0x80) == 0)) {
> // got a packet
> uint16_t payload = (firstbyte << 7) | byte;
> uint8_t address = (firstbyte >> 4) & 7;
> uint8_t dac = payload & 0xff;
> uint8_t dir = (payload & 0x100) == 0x100;
> uint8_t out = (payload & 0x200) == 0x200;
> if(address < 6) {
> analogWrite(dacpinmap[address], dac);
> digitalWrite(pinmap[address], out);
> pinMode(pinmap[address], dir);
> }
> }
> firstbyte = byte;
> }
> uint16_t v = analogRead(adc) | (adc << 11);
> if(digitalRead(pinmap[adc])) v |= (1<<10);
> Serial.write((v >> 7) | 0x80);
> Serial.write(v & 0x7f);
> adc = (adc + 1) % 6;
> }
>
>
>
> and the python stuff
>
>
>
>
> import serial
> import hal
> import sys
> import time
>
> def encode(addr, data):
> if data < 0 or data > 2048: raise ValueError, "data %02d out of range"
> % data
> if addr < 0 or addr > 8: raise ValueError, "address %02d out of range"
> % addr
> b1 = 0x80 | (addr << 4) | (data >> 7)
> b2 = data & 0x7f
> return chr(b1) + chr(b2)
>
> PORT = "/dev/ttyUSB0"
>
> if len(sys.argv) > 1:
> PORT = sys.argv[1]
>
> if len(sys.argv) > 2:
> nout = int(sys.argv[2])
> else:
> nout = 6
>
> if nout > 6 or nout < 0:
> raise SystemExit, "Number of digital outputs must be from 0 to 6"
>
> pinmap = [2,4,7,8,12,13]
> dacpinmap = [3,5,6,9,10,11]
>
> ser = serial.Serial(PORT, 9600, timeout=2)
>
> c = hal.component("arduino")
> for port in range(6):
> c.newpin("analog-in-%02d" % port, hal.HAL_FLOAT, hal.HAL_OUT)
> c.newparam("analog-in-%02d-offset" % port, hal.HAL_FLOAT, hal.HAL_RW)
> c.newparam("analog-in-%02d-gain" % port, hal.HAL_FLOAT, hal.HAL_RW)
> c.newpin("analog-out-%02d" % dacpinmap[port], hal.HAL_FLOAT, hal.HAL_IN)
> c.newparam("analog-out-%02d-offset" % dacpinmap[port], hal.HAL_FLOAT,
> hal.HAL_RW)
> c.newparam("analog-out-%02d-scale" % dacpinmap[port], hal.HAL_FLOAT,
> hal.HAL_RW)
> c['analog-in-%02d-gain' % port] = 1.0
> c['analog-out-%02d-scale' % dacpinmap[port]] = 1.0
> for port in range(nout):
> c.newpin("digital-out-%02d" % pinmap[port], hal.HAL_BIT, hal.HAL_IN)
> c.newparam("digital-out-%02d-invert" % pinmap[port], hal.HAL_BIT,
> hal.HAL_RW)
> for port in range(nout, 6):
> c.newpin("digital-in-%02d" % pinmap[port], hal.HAL_BIT, hal.HAL_OUT)
> c.newpin("digital-in-%02d-not" % pinmap[port], hal.HAL_BIT, hal.HAL_OUT)
> c.newparam("digital-in-%02d-pullup" % pinmap[port], hal.HAL_BIT,
> hal.HAL_RW)
> c.ready()
>
> firstbyte = 0
> state = 0
> try:
> while 1:
> while ser.inWaiting():
> byte = ord(ser.read())
> if firstbyte & 0x80 == 0x80 and byte & 0x80 == 0:
> v = (firstbyte << 7) | byte
> port = (v >> 11) & 7
>
> if port < 6:
> if port >= nout:
> b = v & 1024
> c['digital-in-%02d' % pinmap[port]] = b != 0
> c['digital-in-%02d-not' % pinmap[port]] = b == 0
>
> gain = c['analog-in-%02d-gain' % port] or 1.
> offset = c['analog-in-%02d-offset' % port]
> value = (v & 1023) / 1023. * 5.0 * gain + offset
> c['analog-in-%02d' % port] = value
>
> firstbyte = byte
>
> scale = c['analog-out-%02d-scale' % dacpinmap[state]] or 1.
> offset = c['analog-out-%02d-offset' % dacpinmap[state]]
> data = (c['analog-out-%02d' % dacpinmap[state]] - offset) / scale /
> 5
> data = int(data * 255 + 0.5)
> if data < 0: data = 0
> if data > 255: data = 255
> if state < nout:
> out = not c['digital-out-%02d' % pinmap[state]]
> invert = not c['digital-out-%02d-invert' % pinmap[state]]
> if out != invert:
> data |= 0x200
> data = data | 0x100
> else:
> pullup = c['digital-in-%02d-pullup' % pinmap[state]]
> if pullup:
> data |= 0x200
> data = data | (state << 11)
> ser.write(chr(0x80 | (data >> 7)))
> ser.write(chr(data & 0x7f))
> state = (state+1) % 6
> time.sleep(.001)
> except (KeyboardInterrupt,):
> raise SystemExit, 0
>
>
>
>
>
>
--
Regards /Groete
Marius D. Liebenberg
+27 82 698 3251
+27 12 743 6064
QQ 1767394877
------------------------------------------------------------------------------
Open source business process management suite built on Java and Eclipse
Turn processes into business applications with Bonita BPM Community Edition
Quickly connect people, data, and systems into organized workflows
Winner of BOSSIE, CODIE, OW2 and Gartner awards
http://p.sf.net/sfu/Bonitasoft
_______________________________________________
Emc-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-developers
