Raspberries/mraa
Private
Public Access
2
0
Fork 0
Code Activity

edison.md: corrected ADC resolution data

Browse Source 
Edison kit for Arduino has TI ADS7951 ADC, which has "12-stored-in-16" bit
resolution.

Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Alex Tereschenko
2015-06-07 09:56:37 +02:00
committed by Brendan Le Foll
parent 299bf5ab27
commit ae9130ee8f
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
docs/edison.md
View File

@@ -23,8 +23,10 @@ in libmraa:
- Max SPI speed is 25Mhz/4 ~6.25Mhz - Max SPI speed is 25Mhz/4 ~6.25Mhz
- SPI PM can sometimes do weird things you can disable it with: - SPI PM can sometimes do weird things you can disable it with:
`echo on > /sys/devices/pci0000\:00/0000\:00\:07.1/power/control` `echo on > /sys/devices/pci0000\:00/0000\:00\:07.1/power/control`
- ADC kernel module will return 12bit number but the ADC itself only has an - ADC kernel module will return 16bit number but the ADC itself only has an
accuracy of 10bits. This ADC is only included on the Arduino board. accuracy of maximum 12bits and in MRAA it's limited to 10bits by default.
Use `mraa_aio_set_bit(12)` to switch to the maximum resolution mode.
This ADC is only included on the Arduino board.
- 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
- Arduino pin 7 can sometimes negatively impact the WiFi capability, if using - Arduino pin 7 can sometimes negatively impact the WiFi capability, if using