On Wednesday, October 07, 2015 2:20 AM, Ian Abbott wrote:
> On 06/10/15 19:11, H Hartley Sweeten wrote:
>> Fix some minor checkpatch.pl issues and tidy up this driver a bit.
>>
>> H Hartley Sweeten (13):
>> staging: comedi: mf6x4: prefer using the BIT macro
>> staging: comedi: mf6x4: remove unnecessary defines
>> staging: comedi: mf6x4: remove unnecessary whitespace
>> staging: comedi: mf6x4: sort the BAR1 register defines
>> staging: comedi: mf6x4: introduce a macro to select the AI channel
>> staging: comedi: mf6x4: A/D converter uses 2's complement coding
>> staging: comedi: mf6x4: remove unnecassary masking of digital outputs
>> staging: comedi: mf6x4: rename the digital input register defines
>> staging: comedi: mf6x4: rename remaining BAR1 register defines
>> staging: comedi: mf6x4: rename private data 'gpio_R'
>> staging: comedi: mf6x4: refactor block comment
>> staging: comedi: mf6x4: change type of local variable
>> staging: comedi: mf6x4: tidy up subdevice init
>>
>> drivers/staging/comedi/drivers/mf6x4.c | 137
>> +++++++++++++++------------------
>> 1 file changed, 63 insertions(+), 74 deletions(-)
>>
>
> Thanks! One thing unaccounted for is that the D/A converter also uses
> 2's complement coding.
>
> Signed-off-by: Ian Abbott <[email protected]>
According to the programming guide, the D/A converters use straight
binary coding:
0x3fff = 9.9988V
0x2000 = 0.0000V
0x1fff = -0.0012V
0x0000 = -10.0000V
Regards,
Hartley
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