TMS320F28030: Loop Back Mode

1. how is are the generated parameters in the loopback mode disabled, after changing the mode. to none loop back, the Tx is continues to transmit.

spi_fifo_init()
{

SpiaRegs.SPICCR.all=0x001F; // 16-bit character, Loopback mode to SpiaRegs.SPICCR.all=0x000F; // 16-bit character, Loopback mode2.

thanks

over 7 years ago

0 Mark Labbato over 7 years ago

Guru 30330 points

The SPI will continue to generate a transmit interrupt request if the conditions to generate an interrupt are met. This means that there are less words in the transmit FIFO than set in TXFFLVL.

Loopback only controls the internal path from transmit to receive.

-Mark

0 jw over 7 years ago in reply to Mark Labbato

Expert 1190 points

if the Receive FIFO interrupt level = 1 and the Receive FIFO Status =0, then an interrupt is not generated.
is this correct?

0 Mark Labbato over 7 years ago in reply to jw

Guru 30330 points

Hi,
Yes, that is true for the receive interrupt.
-Mark

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TMS320F28030: Loop Back Mode