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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| en:software:homelab:library:module:sensor [2010/12/30 11:57] – allan.pettai | en:software:homelab:library:module:sensor [2020/07/20 09:00] (current) – external edit 127.0.0.1 | ||
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| * Returns distance in centimeters or -1 if it cannot be calculated. | * Returns distance in centimeters or -1 if it cannot be calculated. | ||
| - | * **// | + | * **// |
| - | Measures distance with ultrasonic distance sensor. | + | Measures distance with ultrasonic distance sensor |
| * //trigger// - Trigger pin variable. | * //trigger// - Trigger pin variable. | ||
| * //echo// - Echo pin variable. | * //echo// - Echo pin variable. | ||
| + | * Returns distance in centimeters or 0 when measuring failed. | ||
| + | * **// | ||
| + | Measures distance with ultrasonic distance sensor SRF05 in one wire regime. Function generates a trigger pulse on the pin and measures the time of echo pulse on the same pin. Distance is calculated from the time. Function expects a 14.7456 MHz clock frequency. Measuring may take up to 36 ms. Parameters: | ||
| + | * // | ||
| * Returns distance in centimeters or 0 when measuring failed. | * Returns distance in centimeters or 0 when measuring failed. | ||
| ===== Example ===== | ===== Example ===== | ||
| - | The following program demonstrates usage of IR and ultrasonic distance | + | The following program demonstrates usage of IR and ultrasonic distance |
| <code c> | <code c> | ||
| Line 45: | Line 49: | ||
| // Ultrasonic distance sensor control pins. | // Ultrasonic distance sensor control pins. | ||
| - | pin pin_trigger = PIN(G, 1); | + | pin pin_triggerecho |
| - | pin pin_echo | + | |
| int main(void) | int main(void) | ||
| Line 57: | Line 60: | ||
| // Measuring with ultrasonic distance sensor. | // Measuring with ultrasonic distance sensor. | ||
| - | distance = ultrasonic_measure(pin_trigger, | + | distance = ultrasonic_measure_srf05(pin_triggerecho); |
| } | } | ||
| </ | </ | ||
| - | |||
