The DAC uses a SPI port. It seems the MCU too has a SPI port, but I think it is meant for a SD card.
For the SPI Port
DAC MCU
CS (Chip Select) An general I/O port (Output)
SDI (Serial Data In) MOSI (Output)
SCLK (Serial Clock) SCK (Output)
Mode Any General I/O (output)
Chip Select pins makes the device ready for SPI access, SDI pin is used to clock in the data, SCLK is the clock pin (this goes high and low for each bit of the data)
Mode ??? (see the datasheet)
Read the DAC and the MCU datasheets very carefully, keep in mind the control voltage for these devices, if the devices use different voltages, level shifters may be needed.
See the SPI timing diagrams, these will show the states of the various pins of the SPI at any given time.
Do the same for the LCD. This has a parallel interface.
Construct the project stagewise, start by interfacing the mcu with DAC. You should develop driver procedures/functions that can read/write to the DAC.
Once you have done this, start by interfacing the mcu with the LCD. Here again develop driver code for controlling the device.
After all this read the datasheet (see examples) to see how the MP3 decoder works.
You should start the actual project only after you have solved the interface problems individually.
hope this helps
thanks
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