Revision 71
fixed packet parsing, remote fully operational
| lab4/mouse.c | ||
|---|---|---|
| 49 | 49 |
pp.rb = pp.bytes[0] & RIGHT_BUTTON; |
| 50 | 50 |
pp.mb = pp.bytes[0] & MIDDLE_BUTTON; |
| 51 | 51 |
pp.lb = pp.bytes[0] & LEFT_BUTTON; |
| 52 |
pp.delta_x = pp.bytes[1];
|
|
| 53 |
pp.delta_y = pp.bytes[2];
|
|
| 52 |
pp.delta_x = sign_extend_byte((packet_bytes[0] & MSB_X_DELTA) != 0, pp.bytes[1]);
|
|
| 53 |
pp.delta_y = sign_extend_byte((packet_bytes[0] & MSB_Y_DELTA) != 0, pp.bytes[2]);
|
|
| 54 | 54 |
pp.x_ov = pp.bytes[0] & X_OVERFLOW; |
| 55 | 55 |
pp.y_ov = pp.bytes[0] & Y_OVERFLOW; |
| 56 | 56 |
return pp; |
| ... | ... | |
| 101 | 101 |
} |
| 102 | 102 |
return TIMEOUT_ERROR; |
| 103 | 103 |
} |
| 104 |
|
|
| 105 |
int16_t (sign_extend_byte)(uint8_t sign_bit, uint8_t byte) {
|
|
| 106 |
return (int16_t)(((0xFF * sign_bit)<<8) | byte); |
|
| 107 |
} |
|
| lab4/mouse.h | ||
|---|---|---|
| 42 | 42 |
* @brief Reads byte from mouse |
| 43 | 43 |
* <summary> |
| 44 | 44 |
* Reads byte from mouse, giving error if exceeds number of tries to read |
| 45 |
* </summary> |
|
| 45 | 46 |
* @param byte Pointer to variable where byte read from mouse will be stored |
| 46 | 47 |
* @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK |
| 47 | 48 |
* @see {_ERRORS_H_::errors}
|
| 48 | 49 |
*/ |
| 49 | 50 |
int (mouse_read_byte)(uint8_t *byte); |
| 50 | 51 |
|
| 52 |
/** |
|
| 53 |
* @brief Converts 9-bit number to 16-bit with sign extension |
|
| 54 |
* @param sign_bit Sign bit identifiying the signal of the number |
|
| 55 |
* @param byte Least significant byte that will be extended |
|
| 56 |
* @return Extended 9-bit number |
|
| 57 |
*/ |
|
| 58 |
int16_t (sign_extend_byte)(uint8_t sign_bit, uint8_t byte); |
|
| 59 |
|
|
| 51 | 60 |
#endif //MOUSE_H_INCLUDED |
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