Hardware » History » Version 4
laforge, 02/19/2016 10:50 PM
| 1 | 3 | laforge | [[PageOutline]] |
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| 2 | 1 | laforge | = OsmoSDR Hardware = |
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| 4 | The OsmoSDR hardware consists of an oscillator, Zero-IF silicon tuner, ADC, FPGA and a USB-capable microcontroller. |
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| 6 | The block schematics looks like this: FIXME |
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| 8 | == Major Components == |
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| 9 | |||
| 10 | === Atmel AT91SAM3U Microcontroller === |
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| 12 | The SAM3U is a quite powerful but inexpensive Cortex-M3 based Microcontroller. What makes it special compared |
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| 13 | to many other devices is its integrated USB 2.0 High-Speed device, combined with scatter-gather DMA and an internal |
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| 14 | memory/bus architecture that can actually drive the USB 2.0 at 480Mbps without any problems. |
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| 16 | The SAM3U [wiki:Firmware] will be available as Free Software / Open Source in our git repository. |
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| 18 | 4 | laforge | * Homepage: http://www.atmel.com/sam3u |
| 19 | * Data Sheet: http://www.atmel.com/dyn/resources/prod_documents/doc6430.pdf |
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| 21 | 1 | laforge | === Lattice XFP2 FPGA === |
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| 23 | The FPGA is mainly intended to interface the ADC with the SSC peripheral of the SAM3U. However, it is reasonable |
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| 24 | to assume it can do some simple filtering, too. |
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| 26 | The FPGA design will be available as Free Software / Open Source in our git repository |
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| 28 | === Analog Devices AD7357 ADC === |
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| 30 | This ADC provides two channels (I and Q) and can run at up to 4.2 Megasamples / second and provides 14 bits of resolution. |
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| 32 | 4 | laforge | * Homepage: http://www.analog.com/en/analog-to-digital-converters/ad-converters/ad7357/products/product.html |
| 33 | * Data Sheet: http://www.analog.com/static/imported-files/data_sheets/AD7357.pdf |
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| 35 | 1 | laforge | === Silicon Tuner === |
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| 37 | FIXME |
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| 39 | === !SiLabs Si570 Oscillator === |
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| 40 | 3 | laforge | |
| 41 | The Si570 is a 10MHz to 1.4GHz programmable oscillator. The exact frequency can be set and adjusted via an I2C interface. |
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| 43 | 4 | laforge | * Data Sheet: http://www.silabs.com/Support%20Documents/TechnicalDocs/si570.pdf |
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| 45 | 1 | laforge | == Status == |
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| 47 | 4 | laforge | * As of 13 December 2011, we had the first 5 prototypes |
| 48 | * As of 28 December 2011, we have hardware verification code and detected some bugs that need a 2nd PCB revision |
