Example MPC5746R DSPI_serialization S32DS.Power.2.1

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* Detailed Description:
* The example performs basic initialization, setup PLL to maximum allowed freq.,
* setup clock for peripherals, GPIO pins.
* DSPI_M1 is configured as master and for DSI function to serialize eTPU channels'
* outputs. eTPU to DSI routing is done by SIU configuration.
* User can see SPI waveform on the scope or logic analyzer.
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* Test HW: MPC5746R-252DC, MPC57xx Motherboard
* MCU: SPC5746RMMT5 CTQG1740 1N83M HKBGCTB
* Fsys: PLL 200MHz
* Debugger: Lauterbach Trace32
* Target: internal_FLASH, RAM
* Terminal: 19200-8-no parity-1 stop bit-no flow control
* EVB connection: connect following pins to scope or logic analyzer
* PA7: DSPI_M1 SOUT (motherboard pin PP[7])
* PA9: DSPI_M1 SCLK (motherboard pin PP[9])
* PA13: DSPI_M1 CS0 (motherboard pin PP[13])
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