topic Re: How to use the K64 uart fifo? in Kinetis Microcontrollers

How to use the K64 uart fifo?

zhailing — Tue, 14 Mar 2017 07:54:25 GMT

I want to use k64 uart fifo implement the function like 51mcu:

void Rcv_ISR () interrupt 4 using 1
{
INT8 data inchar;

if(RI)
{
inchar = SBUF;
if(inchar == '*')
{
RX_Index1 = 0;
}

if(RX_Index1 <= (RX_MAXBUF-1) )
{
RX_BUF1[RX_Index1] = inchar;
if(RX_BUF1[RX_Index1] == '$')
{
if(RX_BUF1[0] == '*')
{
if(RX_BUF1[2] == '2')
{
ACKflag = 1;
}
else
{
if(RX_FULL == 0)
{
RX_FULL = 1;
RX_Index2 = RX_Index1;
memcpy(RX_BUF2,RX_BUF1,RX_Index2+1);
}
else
{
//
}
}
RX_BUF1[0] = 0;
RX_BUF1[2] = 0;
RX_Index1 =0;
}
}
RX_Index1++;
}
else
{
RX_Index1 =0;
}
RI = 0;
}

if(TI)
{
if(TX_EN == 1)
{
if(TX_Tail == TX_Head)
{
if(TX_Full == 1)
{
SBUF = TX_BUF[TX_Tail];
TX_Tail = (TX_Tail+1)%TX_MAXBUF;
TX_Full = 0;
}
else
{
TX_Empty = 1;
}
}
else
{
SBUF = TX_BUF[TX_Tail];
TX_Tail = (TX_Tail+1)%TX_MAXBUF;
}
}
else
{
TX_Empty = 1;
TX_Full = 0;
}
TI = 0;
}

I can't find fifo uart demo in sdk;How to config it ?

Thanks and best regards.

zhai

Re: How to use the K64 uart fifo?

Robin_Shen — Thu, 16 Mar 2017 05:49:59 GMT

Hi zhai,

Please refer the method in the attached "UART FIFO watermark test.c" file.

Best Regards,

Robin

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Re: How to use the K64 uart fifo?

zhailing — Thu, 16 Mar 2017 07:48:24 GMT

Hi Robin_Shen

I don't have "UART FIFO watermark test.c".can you send it to me ?

Thanks

Best Regards,

zhai

Re: How to use the K64 uart fifo?

Robin_Shen — Thu, 16 Mar 2017 08:49:54 GMT

See the attached file in last reply.

Re: How to use the K64 uart fifo?

zhailing — Thu, 16 Mar 2017 09:30:21 GMT

Hi Robin_Shen

My Hardware demo board is FRDM-k64. Software tool is IAR. Do you have the uart fifo demo for it.

Thangs and best Rregards

zhai

Re: How to use the K64 uart fifo?

Robin_Shen — Fri, 17 Mar 2017 07:46:51 GMT

I am sorry, I don't have the uart fifo demo for it.