MC9S12DP256 SCI Interrupt driven help

dshah007 — Sat, 22 Mar 2008 11:45:35 GMT

I am trying to send a 10 byte string onto the MCU. I have been trying to write a SCI interrupt code that take this string when it arrives. How do I go about doing this. So far I have the following:

char number[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x67};

void main(void)
{

   SCI0BDL = 156;      //set baud rate = 9600
   //SCI0CR1 = 0x40;   // LOOPS,WOMS,RSRC,M,WAKE,ILT,PE,PT
                              // sci disable in wait,parity disable,odd parity
   SCI0CR2 = 0x2C;   // TIE,TCIE,RIE,ILIE,TE,RE,RWU,SBK
                             // rxfull or int enable, ,transmitter enable,receiver enable

}

__interrupt void sci0ISR(void)
{
int sci0_data_in;

sci0_data_in = SCI0DRL - 48; // read received character + clear interrupt flag
PTH = number[sci0_data_in]; // show received data on port B
}

Currently, I am trying to write a piece of code that would take a byte at a time and display it onto Port H. However, this interrupt code that I have written seems to fail. I am trying to figure this out, but I am being unsuccessful at this. Any help or suggestions will be really appreciated. Thanks.

Re: MC9S12DP256 SCI Interrupt driven help

JimDon — Sat, 22 Mar 2008 13:14:06 GMT

Here is some sample code for the SCI. Scroll down to the samples section.

It works, and should answer most of you questions.

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MC9S12DP256 SCI Interrupt driven help

Re: MC9S12DP256 SCI Interrupt driven help