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raspberry pi: add doc for model b

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Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
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Thomas Ingleby
2014-11-21 16:44:56 +00:00
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Raspberry Pi Model B {#rasppib}
====================
The Raspberry Pi is based on the Broadcom BCM2835 system on a chip,
which includes an ARM1176JZF-S 700 MHz processor, VideoCore IV GPU
and was originally shipped with 256 megabytes of RAM, later
upgraded (Model B & Model B+) to 512 MB.
Revision Support
----------------
Currently only rev 1 is supported.
Interface notes
---------------
**GPIO** Supported on pin 6,10,11,12,14,15,17,21
**PWM** Whilst the Raspberry Pi is meant to have 1 PWM channel this is currently not supported.
**I2C** The blacklist for the kernel module will need to be removed and the `i2c-dev` needs to be loaded.
**SPI** The blacklist for the kernel module needs to be removed and `spidev` loaded
Pin Mapping
-----------
| MRAA Number | Physical Pin | Function |
|-------------|--------------|----------|
| 1 | P1-01 | 3V3 VCC |
| 2 | P1-02 | 5V VCC |
| 3 | P1-03 | I2C SDA |
| 4 | P1-04 | 5V VCC |
| 5 | P1-05 | I2C SCL |
| 6 | P1-06 | GND |
| 7 | P1-07 | GPIO(4) |
| 8 | P1-08 | UART TX |
| 9 | P1-09 | GND |
| 10 | P1-10 | UART RX |
| 11 | P1-11 | GPIO(17) |
| 12 | P1-12 | GPIO(18) |
| 13 | P1-13 | GPIO(21) |
| 14 | P1-14 | GND |
| 15 | P1-15 | GPIO(22) |
| 16 | P1-16 | GPIO(23) |
| 17 | P1-17 | 3V3 VCC |
| 18 | P1-18 | GPIO(24) |
| 19 | P1-19 | SPI MOSI |
| 20 | P1-20 | GND |
| 21 | P1-21 | SPI MISO |
| 22 | P1-22 | GPIO(25) |
| 23 | P1-23 | SPI SCL |
| 24 | P1-24 | SPI CS0 |
| 25 | P1-25 | GND |
| 26 | P1-26 | SPI CS1 |