TMS320F28335: SCI A serial

Thanks for your response.
I've used many microcontrollers, but this is without a doubt the most complicated to set by UART.

I've tried several configurations for the registers, but I can only send 16 bytes.

Could you provide an example of configuration and byte sending?

Thank you very much in advance.

Alexander

Hi Alexandre,

There are certainly some nuances to using the SCI module. To better help you, could you explain a bit of what you have been trying? Are you using interrupts? When and how are you checking that the TX buffer has space before writing to it? Are you scoping the data lines to help verify communication? Are you also trying to receive data or only transmit? At a broader level, what is the goal of your system/communication so I can understand the requirements?

If you are using interrupts, it could also be helpful to reference the TRM section that outlines the interrupt flags you will want to pay attention to in Figure 10-10. SCI FIFO Interrupt Flags and Enable Logic:

Best Regards,

Allison

Thanks for the answer.
What I need is to send a block of 256 bytes via uart.
No interruptions, just send...
void scia_xmit(int a)
{
while (SciaRegs.SCICTL2.bit.TXRDY == 0) {}
SciaRegs.SCITXBUF=a;

}

WD_Disable(void);
GPIO_Setup(void); //GPIO28 and GPIO29
SCI_Setup(void(); //NO Interrupts
void xtm(int); // Send data for SCI-A

Uint16 sdataB[256]; // data
int i;
int main(void){

WD_Disable();
GPIO_Setup();
SCI_Setup();                                 //NO Interrupts

for(i=0;i<256;i++){
xtm(sdataB[i]);
}

}

Hi Alexandre,

Thanks for the updates - with this are you still unable to transmit more than 16 bytes (and is that the only issue, as in, the correct data is being transmitted, right?)? Could you please ensure your configurations are without FIFO mode? Note that there is also a helpful FAQ for double checking your issues and checking your setup process for SCI: https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1031947/faq-my-c2000-sci-is-not-transmitting-and-or-receiving-data-correctly-how-do-i-fix-this. Did you start with one of the SCI examples as a reference and alter the code for your application?

Best Regards,

Allison