Hallo,
ich bin mir nicht sicher ob ich hier richtig bin???
Ich habe hier ein fox-board mit einem AVR über zwei MAX485 verbunden, je
einen 120 ohm Terminator dran gehängt und versuche jetzt über die
sagenhafte Strecke von 40 cm zu kommunizieren.
Hier das Ergebnis:
Beispiel 1:
1 | [root@axis- /root]99# /mnt/flash/rs485tx.out test12345678test
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2 | RX = 0x00
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3 | RX = 0x26 [&]
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4 | RX = 0xFFFFFF98
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5 | RX = 0x5F [_]
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6 | RX = 0x72 [r]
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7 | RX = 0x65 [e]
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8 | RX = 0x73 [s]
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9 | RX = 0x70 [p]
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10 | RX = 0x6F [o]
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11 | RX = 0x6E [n]
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12 | RX = 0x73 [s]
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13 | RX = 0x65 [e]
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14 | RX = 0x5F [_]
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15 | RX = 0x0A
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16 | RX = 0x74 [t]
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17 | RX = 0x65 [e]
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18 | RX = 0x73 [s]
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19 | RX = 0x74 [t]
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20 | RX = 0x31 [1]
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21 | RX = 0x32 [2]
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22 | RX = 0x33 [3]
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23 | RX = 0x34 [4]
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24 | RX = 0x35 [5]
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25 | RX = 0x36 [6]
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26 | RX = 0x37 [7]
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27 | RX = 0x38 [8]
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28 | RX = 0x74 [t]
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29 | RX = 0x65 [e]
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30 | RX = 0x73 [s]
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31 | RX = 0x74 [t]
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32 | RX = 0x3B [;]
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33 | &_response_
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34 | test12345678test;
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Beispiel 2:
1 | [root@axis- /root]99# /mnt/flash/rs485tx.out test12345678test
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2 | RX = 0xFFFFFF80
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3 | RX = 0xFFFFFF82
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4 | RX = 0xFFFFFF82
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5 | RX = 0xFFFFFFFA
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6 | RX = 0x25 [%]
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7 | RX = 0xFFFFFF95
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8 | RX = 0xFFFFFFCD
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9 | RX = 0xFFFFFFC1
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10 | RX = 0xFFFFFFBD
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11 | RX = 0xFFFFFFB9
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12 | RX = 0xFFFFFFCD
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13 | RX = 0xFFFFFF95
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14 | RX = 0x7D [}]
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15 | RX = 0x29 [)]
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16 | RX = 0xFFFFFFA2
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17 | RX = 0xFFFFFF95
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18 | RX = 0xFFFFFFCD
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19 | RX = 0xFFFFFFD1
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20 | RX = 0xFFFFFFC5
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21 | RX = 0xFFFFFF92
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22 | RX = 0xFFFFFF9A
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23 | RX = 0xFFFFFFA2
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24 | RX = 0xFFFFFFAA
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25 | RX = 0xFFFFFFB2
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26 | RX = 0xFFFFFFBA
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27 | RX = 0xFFFFFFC2
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28 | RX = 0xFFFFFFA2
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29 | RX = 0xFFFFFF95
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30 | RX = 0xFFFFFFCD
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31 | RX = 0xFFFFFFD1
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32 | RX = 0xFFFFFFED
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33 | RX = 0x02
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34 |
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35 | Strg+C
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Slave in Bascom:
1 | $regfile = "m32def.dat"
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2 | $crystal = 14745600
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3 |
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4 | '$baud = 9600
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5 | $baud = 115200
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6 |
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7 | Config Print0 = Portd.6 , Mode = Set
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8 |
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9 | Config Pind.6 = Output 'set the direction yourself
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10 |
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11 |
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12 |
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13 | Dim Myadr As String * 3
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14 | Dim Resp As String * 200
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15 |
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16 | Do
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17 |
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18 |
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19 | Input Resp ' get response
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20 | Waitms 200
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21 | Print "000_response_" ; Resp ; ";"
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22 |
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23 | Loop
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Das Ergebnis in Beispiel 2 kann man ja noch im Programm abfanngen, aber
in Beispiel 1 wird der Anfang verstümmelt?!
wenn jemand eine Idee hat .....
PS: die beiden Teilnehmer haben keine gemeinsame Masse!!
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