About SPI for MPC5748G

[akhileshverneka]

Sir is there a need to do Chip Select first and then push data into Tx fifo.

[PetrS]

Hi,

because it is defined this way in header file, see MPC5748G.h file.

You can also use DSPI_3_PUSHR = 0x08011111;

BR, Petr

[akhileshverneka]

Sir do we need to add data into fifo and do chip select or do chip select first and push data into fifo.

[PetrS · Accepted solution]

Hi,

you need to write 32bit word into PUSHR (16bit command+ 16bit data). This command word specify CTAR used, which chipselect is used, etc.

So assuming DSPI_3_PUSHR = 0x08011111, command word is 0x0801. That means CTAR0 setting is used and PCS0 will be asserted during transfer. Also EOQ bit is set so further transfers will not continue until SR[EOQF] is cleared.

BR, Petr