doc:crazyradio:usb:index
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doc:crazyradio:usb:index [2012-05-15 00:03] arnaud [Dongle configuration] |
doc:crazyradio:usb:index [2012-05-17 13:53] arnaud |
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| | 0x40 | SET_RADIO_ARD (0x05) | | 0x40 | SET_RADIO_ARD (0x05) | ||
| | 0x40 | SET_RADIO_ARC (0x06) | | 0x40 | SET_RADIO_ARC (0x06) | ||
| + | | 0x40 | ACK_ENABLE (0x10) | ||
| | 0x40 | SET_CONT_CARRIER (0x20) | | 0x40 | SET_CONT_CARRIER (0x20) | ||
| | 0x40 | LAUNCH_BOOTLOADER (0xFF) | Zero | Zero | Zero | None | | | 0x40 | LAUNCH_BOOTLOADER (0xFF) | Zero | Zero | Zero | None | | ||
| Line 99: | Line 100: | ||
| === Continuous carrier mode === | === Continuous carrier mode === | ||
| + | |||
| + | ^ bmRequestType ^ bRequest | ||
| + | | 0x40 | ACK_ENABLE (0x10) | ||
| + | |||
| + | By default Crazyradio is configured with auto ack enable. It means that after transmiting a packet the radio waits for an acknoledge from the receiver. This setting permits to deactivate waiting for the Ack packet so that the packet will be sent only one time and there are no guarantee that it has been correctly received. | ||
| + | |||
| + | ^ Active values ^ Meaning | ||
| + | | 0 | Auto ack deactivated | ||
| + | | Not 0 | Auto ack enable (default) | | ||
| + | |||
| + | === Continuous carrier mode === | ||
| + | |||
| + | ^ bmRequestType ^ bRequest | ||
| + | | 0x40 | SET_CONT_CARRIER (0x20) | ||
| + | |||
| + | The nRF24L radio chip provides a test mode in which a continous non-modulated sine wave is emited. This permits, among other things, to test the quality of the RF elements of the board. When this mode is activated the radio dongle does not transmit any packets. | ||
| + | |||
| + | while the continuous carrier mode is active it is possible to set channel and power to change the frequency and power of the emitted wave. | ||
| + | |||
| + | ^ Active values ^ Meaning | ||
| + | | 0 | Dongle working normally (default) | | ||
| + | | Not 0 | Dongle in continuous carrier mode | | ||
| === Launch bootloader === | === Launch bootloader === | ||
| + | |||
| + | ^ bmRequestType ^ bRequest | ||
| + | | 0x40 | LAUNCH_BOOTLOADER (0xFF) | Zero | Zero | Zero | None | | ||
| + | |||
| + | This command is used to launch the Nordic semiconductor USB bootloader. After sending this command a USB reset shall be emitted which will trigger the dongle to start the bootloader. After sending this command the Dongle is only waiting for a USB reset which means that any other commands or data will be ignored. | ||
| + | |||
| + | The bootloader is pre-loaded by Nordic Semi. in the nRF24LU1 chip at the address 0x7800. The Crazyradio firmware will jump to it when the sequence LAUCH_BOOTLOADER following by a USB reset is executed. The bootloader will appear at VID/PID of 0x1915/ | ||
| + | |||
| + | A PC client for the bootloader is part of the Crazyflie ground station program. | ||
| + | |||
| ==== Data transfer ==== | ==== Data transfer ==== | ||
| Line 122: | Line 155: | ||
| This protocol permits to transfer about 500 packets per seconds. | This protocol permits to transfer about 500 packets per seconds. | ||
| ===== Radio protocol ===== | ===== Radio protocol ===== | ||
| - | |||
doc/crazyradio/usb/index.txt · Last modified: 2020-05-12 14:12 by kimberly
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