TMS320F28035: Looking for SPI example code for the slave on TMS320F28035

Markus Jo

this is my C code for the slave

void spi_init(void)
{
//SpiaRegs.SPICCR.all = 0x0007; //Data is ready on rising edge), loopback is off, 8-bit data
SpiaRegs.SPICTL.all = 0x000A; //Normal SPI clocking scheme(Data in latch on rising edge)slave, 4-pin option, No interrupt
SpiaRegs.SPICTL.bit.CLK_PHASE = 1;
SpiaRegs.SPIBRR = 0x0077; //BateRate 0.5MHz
SpiaRegs.SPICCR.all = 0x0087; //SPI is ready to transmit or receive the next character.
SpiaRegs.SPICCR.bit.CLKPOLARITY = 0; //0
SpiaRegs.SPIPRI.bit.FREE = 1;
}

but this code doesnt work ;(

over 2 years ago

0 Markus Jo over 2 years ago

Prodigy 135 points

I have now connected both controllers to each other, it is ensured that the master can send, I checked that with a logic analyzer. I am sending some hex numbers for testing purposes. The slave would then have to receive the data in the SPIRXBUF from SPIA. Unfortunately this does not work. The initialization for the slave can be seen above, can someone help me with this? thanks

0 Marlyn Rosales Castaneda20 over 2 years ago in reply to Markus Jo

TI__Mastermind 22835 points

Hi Markus,

Markus Jo said:
The slave would then have to receive the data in the SPIRXBUF from SPIA. Unfortunately this does not work.

When you say "this does not work", does that mean that the data is incorrect or you are not able to read any of the incoming data? Could you please elaborate. The initialization seems okay, make sure that both the master and slave have the same clock polarity, clock phase, and baud rate.

Best Regards,

Marlyn

0 Markus Jo over 2 years ago in reply to Marlyn Rosales Castaneda20

Prodigy 135 points

I can now send data, it works, but thanks for your help

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TMS320F28035: Looking for SPI example code for the slave on TMS320F28035