Posted on September 12, 2013 at 11:06 Hi, I recently bought the STM32F4DIS-LCD manufactured by Embest, I have wired the TFT and touchscreen components to my discovery board directly (as I have no need for the base board), using these schematics and pin outs:
http://www.elementcom/community/servlet/JiveServlet/downloadBody/51693-102-2-272413/STM32F4DIS-BB-STM32F4DIS-CAM-STM32F4DIS-LCD-Schematic%2020130zip
Schematic:
I'm having trouble getting the touchscreen aspect of the touchscreen calibration example (provided by STM) to work. When I look at the registers for the I2C bus the DR is always 0?! I haven't used any capacitors or any of the 22R resistors when wiring the TFT to the discovery board, but I have tried including the 4.7K resistor between pins 5 and 8 with no success. Please could someone point in the right direction to getting this to work?
Cheers, Marc.
stm32 lcd discovery tft
