replace polling with interrupt

Jun 30, 2006 4 Replies
S

Hello Everyone, I am trying for the first time to write an interrupt driven routine. Here I want to transmit n*8 bytes of data over a serial interface



While( Count < n) { // sent an byte



for(;;) // i will be polling the registers to check which flag is set { read_register() If (Tx_Flag_Successful) Decrement Count break else Count=0 ; Resend data from begining } }



Now if I want to replace the above with an interupt driven process, I can do so easily for the inner for loop(). If I want to replace even the while loop ( i.e transmit a bolck of data with interrupts) how can I do it ? Please advice me on this.



Thanks in advance, Warm Regards, Swathi



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J

On 30 Jun 2006 11:26:35 -0700, snipped-for-privacy@gmail.com wrote in comp.arch.embedded:

What processor or microcontroller? What UART?

Jack Klein Home: http://JK-Technology.Com FAQs for comp.lang.c http://c-faq.com/ comp.lang.c++ http://www.parashift.com/c++-faq-lite/alt.comp.lang.learn.c-c++ http://www.contrib.andrew.cmu.edu/~ajo/docs/FAQ-acllc.html
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J

On 1 Jul 2006 03:36:17 -0700, snipped-for-privacy@gmail.com wrote in comp.arch.embedded:

If you are using an unidentified proprietary OS, it will be very difficult for anybody here to help you. How you set up an interrupt routine is usually very dependent on the OS.

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S

Whoa - hold on one sec. Are you trying to use a UART to send data over I2C? Does your UART have a I2C mode then?

In general, setting up IRQ-driven transmission involves the following steps: - set up a pointer to the start of a buffer - enable a tx-buffer-empty interrupt - send the first character, increment the pointer - within the interrupt, send the next character if there is one and increment the pointer, else disable the interrupt

Steve

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