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galileorevh.md: Added SPI info, Fixed formatting

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Added information on how to turn on GPIO 10 for CS and fixed the wild formatting

Signed-off-by: Houman Brinjcargorabi <houman.brinjcargorabi@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Houman Brinjcargorabi
2016-03-21 14:57:37 +00:00
committed by Brendan Le Foll
parent 6fc2bef13f
commit a7c688b867
1 changed files with 12 additions and 2 deletions
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14
docs/galileorevh.md
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@@ -17,6 +17,16 @@ The Gen 2 board has the following limitations in libmraa:
accuracy of 10bits. accuracy of 10bits.
- AIO pins are treated as 0-5 in mraa_aio_init() but as 14-19 for everything - AIO pins are treated as 0-5 in mraa_aio_init() but as 14-19 for everything
else. Therefore use mraa_gpio_init(14) to use A0 as a Gpio else. Therefore use mraa_gpio_init(14) to use A0 as a Gpio
- To explicitly use GPIO 10 for SPI and allow the kernel to handle the chip select, set
`intel_qrk_plat_galileo_gen2.gpio_cs=1` on the kernel line in the boot config on the
galileo, this can be found at `/media/mmcblk0p1/boot/grub/grub.conf`
- if done correctly it should look similiar to this:
<pre>
title Quark X1000 kernel-MassStorage iot-devkit on SD IMR-On IO-APIC/HPET NoEMU debug
root (hd0,0)
kernel /bzImage root=/dev/mmcblk0p2 <b>intel_qrk_plat_galileo_gen2.gpio_cs=1</b> rootwait console=ttyS1,115200n8 earlycon=uart8250,mmio32,0x8010f000,115200n8 reboot=efi,warm apic=debug rw LABEL=boot debugshell=5
</pre>
Uart 1 on gen2 Uart 1 on gen2
-------------- --------------
@@ -26,8 +36,8 @@ possible to use it from A2(Rx)/A3(Tx). However mraa does not support this
directly so you need to enable the muxing manually. Here is an example of how directly so you need to enable the muxing manually. Here is an example of how
this is done, this was tested using an FTDI 3.3V TTL cable: this is done, this was tested using an FTDI 3.3V TTL cable:
```
$ systemctl stop serial-getty@ttyS1.service $ systemctl stop serial-getty@ttyS1.service
$ python $ python
>>> # Configure the Muxes for Uart1 on Aio2/3 >>> # Configure the Muxes for Uart1 on Aio2/3
>>> import mraa as m >>> import mraa as m
@@ -53,4 +63,4 @@ $ python
>>> x.writeStr('hello') >>> x.writeStr('hello')
>>> x.read(5) >>> x.read(5)
bytearray(b'dsds\n') bytearray(b'dsds\n')
```