Hi,
I would like to know about IIO and the AM335X.
I know that there is this documentation : processors.wiki.ti.com/.../AM335x_ADC_Driver's_Guide
But I would like to know what happen when you declare a ADC component connected by I2C.
If the driver use the INDIO DIRECT MODE , I would like to know who is polling the component to get the input ? One of the kernel/linux process ? Or a layer of the processor ?
I'm asking this question because I wonder if it takes a lot of cpu to poll an ADC component in continuous mode.
I'm asking this question, because I need to put on I2C : two UART ( MAX3107 ) , one ADC Converter ADC128D818 . And I'm worried about the CPU load and the limit of the bandwidth on the I2C.
I have 3 I2C avaible,
I2C0 : I would like to use it for the ADC converter. And I'm going to use the pru to bitbang this component. This will remove a lot of CPU load because depending of the values on each channel, I need to detect 4 states.
I2C1: this I2C will be used for two UART ( 2x MAx3107 )
I2C2: eeprom, rtc, audio control ( tlv320aic3x ), hdmi, tps65217 :
I think that the tps65217 + RTC + eeprom + tlv320aic3x and the hdmi don't use a lot of bandwidth so it should work.
In the worst case scenario, the ADC + UART 1+ UART 4 + the two uart on I2C will be used .
Is that two much for the AM335X processor ? and what about HDMI with all that ?
Micka,
