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| Rev 51 | Rev 64 | ||
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| Line 16... | Line 16... | ||
| 16 | #include <p18cxxx.h> |
16 | #include <p18cxxx.h> |
| 17 | #define CLOCK_FREQ (40000000) // Hz |
17 | #define CLOCK_FREQ (40000000) // Hz |
| 18 | #define INSTR_FREQ (CLOCK_FREQ/4) |
18 | #define INSTR_FREQ (CLOCK_FREQ/4) |
| 19 | #define CLOCK_FOSC (40) // MHz |
19 | #define CLOCK_FOSC (40) // MHz |
| 20 | 20 | ||
| 21 | #define UART_BAUD_RATE ( |
21 | #define UART_BAUD_RATE (115200) // bps |
| - | 22 | #define HIGH_BRG |
|
| 22 | 23 | ||
| - | 24 | #ifdef HIGH_BRG |
|
| - | 25 | #define SPBRG_VAL ( ((CLOCK_FREQ/UART_BAUD_RATE)/4) - 1) |
|
| - | 26 | #define SPBRGH_VAL 0 |
|
| - | 27 | #else |
|
| 23 | #define SPBRG_VAL ( ((INSTR_FREQ/UART_BAUD_RATE)/16) - 1) |
28 | #define SPBRG_VAL ( ((INSTR_FREQ/UART_BAUD_RATE)/16) - 1) |
| - | 29 | #endif |
|
| - | 30 | ||
| 24 | 31 | ||
| 25 | #if (SPBRG_VAL > 255) |
32 | #if (SPBRG_VAL > 255) |
| 26 | #error "Calculated SPBRG value is out of range for currnet CLOCK_FREQ." |
33 | #error "Calculated SPBRG value is out of range for currnet CLOCK_FREQ." |
| 27 | #endif |
34 | #endif |
| 28 | 35 | ||