XUartLite_Send problem， i can noly send 15 bytes char once..

[retni]

I use the uartlite ip on zynq 7010.

I can send data to my pc, but the problem is only 15bytes can be send once no matter what 'NumBytes' parameter I set. 

My code is like this:

	char *testWord = "1234567890qwertyuiopasdfghjklzxcvbnm";
	XUartLite_Send(&UartLiteDebug, testWord, strlen(testWord));
	while (XUartLite_IsSending(&UartLiteDebug)) {
	};
	XUartLite_SendByte(UART_DEBUG_BASEADDR, 0Xd);

UartLiteDebug is the UartLite instance I defined.

I can only receive 

'1234567890qwert'

 And I check the strlen(testWord) in debug mode , it is 36. 

Please help me .

thanks！

[hpoetzl]

Hey @retni,

The Feature Summary for the AXI Uart Lite (PG142) lists ...

Generates a rising-edge sensitive interrupt when the receive FIFO becomes non-empty or when the transmit FIFO becomes empty. This interrupt can be masked by using an interrupt enable/disable signal. The device contains a baud rate generator and independent 16-character deep transmit and receive FIFOs.

So I wouldn't expect the XUartLite_Send() to be able to handle more characters at once.

Also, you do not check the return value of XUartLite_Send(), which is the number of successfully sent bytes.

I'd suggest to check the return value and break down long strings into smaller chunks.

Hope this helps,

Herbert

[retni]

thanks hpoetzl!

I use the function at normal mode, I did not check the return value of XUartLite_Send().

I will use the interrupt mode to try this.

thanks!

[vasukisoni]

Hello,

I have a basic doubt on the Uart application. I want to know that physically on the board, how are you making connection to the PC or a terminal to see uart messages. Can you please specify that for you board, which port and how are you connected to the PC via Uart ?

My board is UltraZed IO Carrier Card having Zynq MPSoC Ultrascale IP.

Please reply. 

Thanks,

Vasuki Soni

[amin57007@gmail.com]

hi

i have the same problem . i send 25 Bytes in my code with XUartLite_Send function but i Receive only 6 correct Bytes and 1 incorrect Byte.

for example i send

u8 Data[25] = {0xC0,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xC1} ;

but i recieve

c0 cc cc cc cc cc 00

please help me to solve this problem ...

thanks