Nabend,
ich habe gerade das Problem, dass sich mein "SCL" Pin nicht bewegt (
toggelt ).
Was mache ich falsch?
Meine main()
1 | tI2c SoftI2c;
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2 |
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3 | int main(void):
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4 | {
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5 | SoftI2c.Port = &PORTC;
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6 | SoftI2c.Scl = 1<<PC0;
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7 | SoftI2c.Sda = 1<<PC1;
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8 | I2cSoftInit( &SoftI2c );
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9 |
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10 | uint8_t Commando[] = { 13 , 0x83 }; // Frequenz Modus + 1Hz
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11 |
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12 | while (1)
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13 | {
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14 | *SoftI2c.Port |= (1<<SoftI2c.Scl);
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15 | *SoftI2c.Port |= (1<<SoftI2c.Sda);
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16 |
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17 | *SoftI2c.Port &= ~(1<<SoftI2c.Scl);
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18 | *SoftI2c.Port &= ~(1<<SoftI2c.Sda);
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19 | }
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20 | }
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Makros:
1 | #ifdef __AVR__
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2 | #define __PORT_DDR__( _p ) (*( (_p-1) ))
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3 | #define __PORT_PIN__( _p ) (*( (_p-2) ))
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4 | #else
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5 | #error Library not Supported for our Device
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6 | #endif
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7 |
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8 | #define Q_DEL _delay_loop_2(3)
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9 | #define H_DEL _delay_loop_2(5)
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10 |
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11 | typedef uint8_t PortBit_t;
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12 | typedef uint8_t Port_t;
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13 |
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14 | typedef struct
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15 | {
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16 | /*
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17 | * Port für das I²C Modul.
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18 | * Es wird die Adresse von dem Daten Richtungs Register
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19 | * später rechnerisch ermittelt.
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20 | */
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21 | volatile Port_t *Port;
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22 |
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23 | /*
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24 | * SCL Pin
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25 | */
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26 | PortBit_t Scl;
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27 |
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28 | /*
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29 | * SDA Pin
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30 | */
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31 | PortBit_t Sda;
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32 |
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33 | }tI2c;
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Und die Init (I2cSoftInit()):
1 | void I2cSoftInit( tI2c *Object )
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2 | {
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3 | __PORT_DDR__( Object->Port ) |= ( 1 << Object->Scl ); // Scl als Ausgang konfigurieren
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4 | __PORT_DDR__( Object->Port ) |= ( 1 << Object->Sda ); // Sda als Ausgang konfigurieren
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5 |
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6 | *Object->Port |= ( 1 << Object->Scl ); // Default Pegel einstellen
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7 | *Object->Port |= ( 1 << Object->Sda ); // ..
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8 | }
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Irgendwo mache ich etwas gravierendes falsch..
