Moins,
Ich verwende in einem Projekt in Atmal Studio den TWI Treiber von Atmel.
Der ist in C geschrieben, ich programmiere in C++. Deshalb muss ich ihn
mit einbinden.
Mein Problem ist nun, dass der C-Compiler die Definitionen aus dem .h
file nicht mehr im .c file findet:
Hier kleine Auszüge aus den Programmen:
TWI_Master.h
1 | #ifndef TWI_Master_h
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2 | #define TWI_Master_h
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3 |
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4 | #ifdef __cplusplus
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5 | extern "C" {
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6 | /****************************************************************************
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7 | TWI Status/Control register definitions
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8 | ****************************************************************************/
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9 | #define TWI_BUFFER_SIZE 4 // Set this to the largest message size that will be sent including address byte.
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10 |
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11 | #define TWI_TWBR 0x0C // TWI Bit rate Register setting.
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12 | // Se Application note for detailed
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13 | // information on setting this value.
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14 |
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15 | und so weiter ....
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TWI_Master.c:
1 | #include <avr/io.h>
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2 | #include <avr/interrupt.h>
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3 | #include "TWI_Master.h"
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4 |
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5 |
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6 | static unsigned char TWI_buf[ TWI_BUFFER_SIZE ]; // Transceiver buffer
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7 | static unsigned char TWI_msgSize; // Number of bytes to be transmitted.
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8 | static unsigned char TWI_state = TWI_NO_STATE; // State byte. Default set to TWI_NO_STATE.
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9 |
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10 | union TWI_statusReg TWI_statusReg = {0}; // TWI_statusReg is defined in TWI_Master.h
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11 |
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12 | /****************************************************************************
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13 | Call this function to set up the TWI master to its initial standby state.
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14 | Remember to enable interrupts from the main application after initializing the TWI.
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15 | ****************************************************************************/
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16 | void TWI_Master_Initialise(void)
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17 |
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18 | usw....
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Hier spuckt mir der Compiler folgende Fehlermeldungen aus:
1 | Building file: .././TWI_Master.c
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2 | Invoking: AVR8/GNU C Compiler : 5.4.0
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3 | C:\Users\steingas\Documents\Atmel Studio\7.0\HomeLED_Anz\HomeLED_Anz\TWI_Master.c(52,31): error: 'TWI_BUFFER_SIZE' undeclared here (not in a function)
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4 | static unsigned char TWI_buf[ TWI_BUFFER_SIZE ]; // Transceiver buffer
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5 | ^
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6 | C:\Users\steingas\Documents\Atmel Studio\7.0\HomeLED_Anz\HomeLED_Anz\TWI_Master.c(54,34): error: 'TWI_NO_STATE' undeclared here (not in a function)
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7 | static unsigned char TWI_state = TWI_NO_STATE; // State byte. Default set to TWI_NO_STATE.
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8 | ^
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9 | C:\Users\steingas\Documents\Atmel Studio\7.0\HomeLED_Anz\HomeLED_Anz\TWI_Master.c(56,7): error: variable 'TWI_statusReg' has initializer but incomplete type
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10 | union TWI_statusReg TWI_statusReg = {0}; // TWI_statusReg is defined in TWI_Master.h
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Da im .c file TWI_BufferSize und TWI_NO_State definiert wurden müsste
der compiler diese eigentlich finden.
Diese Definitionen sind von Atmel.
Wo liegt der Fehler?
Viele Grüße
Alexander
