We are still struggling with the SPI connection between the Gumstix
(OMAP3530) and the TI ADS1278.
We have a couple of questions relative to the current state of this effort:
1. Does u.boot create a virtual memory map to keep track of the
register values? If so, what is the memory location of this table?
2. We are using the ADS7846 touch-screen controller driver as an
example of how to write a driver for the TI ADS1278 analog-to-digital
converter, however the ADS1278 does not have a "chip enable/select"
line. This creates a question about the status of the OMAP3530 as
the Master in the SPI relationship with the ADS1278, should we drive
the "chip enable/select" line low (similar to the ADS7846) physically
(by grounding it) or via software (within the driver)?
Since the ADS1278 DEV does not have chip select (it is read only)
uboot disables SPI SCLK...
The choice is also upon us to select kernel or user driver writing.
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