Hallo Leute, ich bins wieder.
Hab diesmal ein Problem mit I²C. Ich versuche einen Bl-Ctrl 2.0 Regler
anzusprechen, es funktioniert jedoch nicht. Die Konfiguration der I²C
Schnittstelle sollte passen, der Programmcode ebenso. Pull - Ups sind
auch vorhanden. Hier mal die Konfiguration der I²C Schnittstelle:
1 | I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
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2 | I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
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3 | I2C_InitStructure.I2C_OwnAddress1 = 0x52;
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4 | I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
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5 | I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
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6 | I2C_InitStructure.I2C_ClockSpeed = 400000;
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7 |
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8 | I2C_Init(I2C1, &I2C_InitStructure);
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9 |
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10 | /* I2C1 SDA and SCL configuration */
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11 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
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12 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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13 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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14 | GPIO_Init(GPIOB, &GPIO_InitStructure);
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15 | I2C_Cmd(I2C1, ENABLE);
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Und das ist der Programmcode (gleich mal sorry für die Länge, weis nicht
was davon relevant ist):
1 | Timeout = 0xFFFF;
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2 |
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3 | myprint2("\r\nEnter...");
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4 | I2C_GenerateSTART(I2C1, ENABLE);
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5 | myprint2("\r\nStart");
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6 | while ((!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT)) && (!stop))
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7 | {
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8 | if(Timeout == 0)
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9 | {
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10 | lEvent = I2C_GetLastEvent(I2C1);
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11 | myprint2("\r\n Error Occured: Code %u", lEvent);
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12 | if(IS_I2C_EVENT(lEvent)){
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13 | myprint2("\r\n Is I2C Event");
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14 | }
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15 |
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16 | stop = 1;
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17 | }
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18 | Timeout--;
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19 | }
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20 | stop = 0;
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21 | Timeout = 0xFFFF;
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22 | myprint2("\r\nEvent 1");
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23 | Delay_ms(20);
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24 | I2C_Send7bitAddress(I2C1, 0x52, I2C_Direction_Transmitter);
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25 |
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26 | myprint2("\r\n7b Address");
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27 | while ((!I2C_CheckEvent(I2C1,
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28 | I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) && (!stop))
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29 | {
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30 | if(Timeout == 0)
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31 | {
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32 | lEvent = I2C_GetLastEvent(I2C1);
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33 | myprint2("\r\n Error Occured: Code %u", lEvent);
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34 | if(IS_I2C_EVENT(lEvent)){
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35 | myprint2("\r\n Is I2C Event");
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36 | }
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37 |
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38 | stop = 1;
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39 | }
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40 | Timeout--;
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41 | }
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42 | stop = 0;
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43 | Timeout = 0xFFFF;
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44 | myprint2("\r\nEvent 2");
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45 | I2C_SendData(I2C1, 100);
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46 | myprint2("\r\nSend Data");
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47 | while ((!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) && (!stop))
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48 | {
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49 | if(Timeout == 0)
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50 | {
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51 | lEvent = I2C_GetLastEvent(I2C1);
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52 | myprint2("\r\n Error Occured: Code %u", lEvent);
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53 | if(IS_I2C_EVENT(lEvent)){
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54 | myprint2("\r\n Is I2C Event");
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55 | }
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56 |
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57 | stop = 1;
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58 | }
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59 | Timeout--;
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60 | }
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61 | stop = 0;
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62 | Timeout = 0xFFFF;
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63 | myprint2("\r\nEvent 3");
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64 | I2C_GenerateSTOP(I2C1, ENABLE);
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65 | myprint2("\r\nStop");
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und die Ausgabe davon in Putty:
1 | Enter...
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2 | Start
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3 | Event 1
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4 | 7b Address
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5 | Error Occured: Code 536870944
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6 | Event 2
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7 | Send Data
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8 | Error Occured: Code 536870944
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9 | Event 3
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10 | Stop
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Ich sitze jetzt hier schon ein paar Stunden und versuche Das Problem zu
lösen. Ich hoffe ihr könnt mir helfen.
Danke schon im vorraus!
mfg,
TDK29
