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| Beide Seiten der vorigen RevisionVorhergehende Überarbeitung | |||
| software:libusbjava:first_steps:start [2015-04-07 10:50] – kalberer | software:libusbjava:first_steps:start [2022-06-17 17:14] (aktuell) – gelöscht Urs Graf | ||
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| - | ====== First Steps with LibusbJava ====== | ||
| - | The following short example will show you how to use LibusbJava in your Java-Project. | ||
| - | The following code describes the required steps to do a bulk transfer to your device. | ||
| - | - Create a new Context (initialises the libusb, returns a context) | ||
| - | - Search your device, for example via Vendor- and Product-ID | ||
| - | - (optionally) get information out of the USB Descriptors | ||
| - | - Open your device | ||
| - | - Claim the desired interface | ||
| - | - write some data with a bulk transfer to your device | ||
| - | - Release interface | ||
| - | - Close the device | ||
| - | <code java> | ||
| - | Device usbDev = null; | ||
| - | try { | ||
| - | useCtx = new Context(); | ||
| - | } catch (LibusbException e) { | ||
| - | System.out.println(" | ||
| - | e.printStackTrace(); | ||
| - | } | ||
| - | |||
| - | System.out.println(" | ||
| - | try { | ||
| - | usbDev = Device.search(useCtx, | ||
| - | |||
| - | } catch (LibusbException e) { | ||
| - | System.out.println(" | ||
| - | e.printStackTrace(); | ||
| - | } | ||
| - | |||
| - | if(usbDev == null) return; | ||
| - | |||
| - | try { | ||
| - | usbDev.open(); | ||
| - | usbDev.claimInterface(0); | ||
| - | byte[] data = {(byte)0x40, | ||
| - | int res = usbDev.bulkTransfer(2, | ||
| - | if(res == data.length){ | ||
| - | System.out.println(" | ||
| - | } | ||
| - | else{ | ||
| - | System.out.println(" | ||
| - | } | ||
| - | usbDev.reset(); | ||
| - | res = 0; | ||
| - | res = usbDev.bulkTransfer(2, | ||
| - | if(res == data.length){ | ||
| - | System.out.println(" | ||
| - | } | ||
| - | else{ | ||
| - | System.out.println(" | ||
| - | } | ||
| - | usbDev.releaseInterface(0); | ||
| - | usbDev.close(); | ||
| - | System.out.println(" | ||
| - | } catch (LibusbException e) { | ||
| - | System.out.println(" | ||
| - | e.printStackTrace(); | ||
| - | } | ||
| - | </ | ||