[ECOS] buzzer on PC

[David N. Welton]

Piotr Trojanek <ptroja@elproma.com.pl> writes:

> how to 'beep' on PC buzzer from ecos?

Oh, I know this one!

    countdown = 1193180 / speaker_frequency;

set_speaker(int countdown)
{
    char snd = 0;
    /* Init speaker.  */
    HAL_WRITE_UINT8(0x43, 0xb6);
    HAL_WRITE_UINT8(0x42, countdown & 0xff);
    HAL_WRITE_UINT8(0x42, countdown >> 8);
    HAL_READ_UINT8(0x61, snd);
    snd |= 3;
    HAL_WRITE_UINT8(0x61, snd);
}

Something like that ought to work.

-- 
David N. Welton
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