I am seeing intermittent issues with the touch screen locking up. I am using SSP v1.1.3 and the DK-S7G2 evaluation board.
What is occurring is that the TOUCH_IRQ line from the touch screen controller chip sometimes stays low.
Under normal working conditions, the TOUCH_IRQ line will go low when the screen is touched. This tells the Synergy touch screen external IRQ driver (g_external_irq) that the screen is being touched. This touch event will then be passed to the Synergy touch screen framework (g_sf_touch_panel_i2c) which will talk to the touch screen controller to read the location touched. After the touch screen controller has been successfully read, he will release the TOUCH_IRQ line such that it now goes high. Then when the screen is touched again the process repeats.
However what I am seeing is that sometimes when the TOUCH_IRQ line goes low it just stays low forever and of course now the touch screen is unresponsive.
I am able to reproduce the same scenario 100% of the time by touching the screen while the PCB resets.
It also occurs while touching the screen on reset with the SK-S7G2 evaluation board and Karol's weather demo (http://renesasrulz.com/cfs-file.ashx/__key/communityserver-discussions-components-files/206/s7_5F00_sk_5F00_ex_5F00_gx_5F00_weather_5F00_1_5F00_1_5F00_0.zip)
Regards,
Jeff
