Trying to program the clock generator, so I can generate pll clock, tx clock and rx clock.
I have an FPGA connected through the HSMC connector to the zipperboard which as the myriadrf board connected with the LMS6002D on it.
As far as I can see, I am suppose to use the SPI interface (CS_2), which is connected to the zipper MCU, which intern is driving the I2C lines towards the clock generator. Is there anything I need to do to setup the MCU? I am trying to use the SPI interface to enable the clocks, but I see no I2C activity out of the MCU. I do see the data and CS_2 into the MCU beeing driven. I am able to use SPI (CS_0) to program the LMS6002D device.
I have modified the connections on the zipper board by removing R15, and adding R24. Also moved the SPI resistors to the “non-usb option”.
As an alternative, it also looks like I can add an I2C master to my FPGA and drive them directly if I add R74 and R75. However, when I look at the HSMC connection towards the FPGA, it seems like SDA is connected to pin 111, and SCL is connected to pin 113. But pin 111 is a power pin, am I reading this correct?