AM335x: What are the registers needed to configure UART2

Hello,
I will move your question to the Sitara forums, where the experts there can help you best.

Thanks
ki

Hi, 

Iam facing problems as follows

1) If i write something in DLL and DLH register by setting LCR to BFh that is reflecting in the THR and RHR.

2) If i switch the operation mode to normal that time i can't write anything in THR.

3)As in the data sheet in the operation mode A and B the module disabled these are only for initialization. According to this after initialization i changed to operationi mode to normal, that time iam not able to write and receive.

4) It is also mentioned that to enable fifo DLL and DLH should be cleared to 0, how it ll be 0..? If write write something in one address it is reflecting to other registter address too. How to avoid this?  

Check that all address offsets are correct in your register definitions. I cannot comment what's wrong from your description alone.

Hi,

These are i have defined ,

#define UART2_BASE_ADDR (0x48024000) /*uart configuration*/
#define UART2_THR (UART2_BASE_ADDR + 0x00)
#define UART2_RHR (UART2_BASE_ADDR + 0x00)
#define UART2_LCR (UART2_BASE_ADDR + 0xC)
#define UART2_DLL (UART2_BASE_ADDR + 0x00)
#define UART2_DLH (UART2_BASE_ADDR + 0x04)
#define UART2_EFR (UART2_BASE_ADDR + 0x08)
#define UART2_FCR (UART2_BASE_ADDR + 0x08)

If i write to EFR that is reflecting to FCR, i need to know which are the basic configuration i have to for uart to work?

Hi this is function i have written in gel file..

uart_enable()
{
UWORD32 i, j, k, num, *buf;
GEL_TextOut("****uart_changes*****\n","Output",1,1,1);

/*for UART2*/
/*pin mux*/
WR_MEM_32(SPI0_D0, 0x01);/*txd*/
WR_MEM_32(SPI0_SCLK, 0x31);/*rxd*/

/*clock enable and reg configuration*/
WR_MEM_32(CM_PER_UART2_CLKCTRL, 0x02);

WR_MEM_32(UART2_LCR, 0x89);/* enabled the latch*/
WR_MEM_32(UART2_DLL, 0x38);/*for 9600 baudrate*/
WR_MEM_32(UART2_DLH, 0x01);
num =0;
WR_MEM_32(UART2_LCR, 0x09);/*return back to normal opearation*/
while(1) {
num = num+1;
WR_MEM_32(UART2_THR, (0x31 + num));/*writing to THR buffer*/
for(k=0;k<10;k++)
{
for(j=0;j<100000;j++);

}
GEL_TextOut("****transmit*****\n","Output",1,1,1);

}
}

When i return back to the normal mode , DLL , DHL, THR, RHR all the values are changing and not getting the any charaacters on pc minicom.