ES1938 MIDI input not working?

ES1938 MIDI input not working?

[Clemens Ladisch]

Hi,

I have a report that, with an ES1938 card, MIDI (input only) doesn't work.
It looks as if MIDI interrupts aren't generated or acknowledged properly.

es9138.c has the following MIDI interrupt code:

	/* MPU401 */
	if (status & 0x80) {
		// snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0); /* ack? */
		if (chip->rmidi) {
			handled = 1;
			snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data, regs);
		}
	}

This was added in revision 1.6 of es1938.c, with the log message "not
tested well". In revision 1.22, the "ack?" line was commented out, without
any relevant log message.

Has this code been tested? Does anybody know if it works, somewhere?


Regards,
Clemens



---------- Forwarded message ----------
Date: Mon, 26 May 2003 10:27:05 +0200
From: Stefan Gruber <GruberLISCON@netscape.net>
Newsgroups: de.comp.os.unix.linux.misc, de.rec.musik.elektronisch
Subject: Re: MIDI: Ausgabe ja, Eingabe nein

(... cat /dev/midi00 ...)

> Wird dabei "Rx bytes" in /proc/asound/card0/midi0 hochgezählt?

Nein. "Rx bytes" bleibt permanent auf Null.

> Wird bei empfangenen MIDI-Bytes ein Interrupt generiert? (kann man in
> /proc/interrupts mitzählen)

Scheinbar kommt auch hier nichts. Auf welchem IRQ müsste der denn kommen?





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Re: ES1938 MIDI input not working?

[Takashi Iwai]

At Mon, 26 May 2003 18:28:52 +0200 (METDST),
Clemens Ladisch wrote:
> 
> Hi,
> 
> I have a report that, with an ES1938 card, MIDI (input only) doesn't work.
> It looks as if MIDI interrupts aren't generated or acknowledged properly.
> 
> es9138.c has the following MIDI interrupt code:
> 
> 	/* MPU401 */
> 	if (status & 0x80) {
> 		// snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0); /* ack? */
> 		if (chip->rmidi) {
> 			handled = 1;
> 			snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data, regs);
> 		}
> 	}
> 
> This was added in revision 1.6 of es1938.c, with the log message "not
> tested well". In revision 1.22, the "ack?" line was commented out, without
> any relevant log message.
> 
> Has this code been tested? Does anybody know if it works, somewhere?

the last time i tried, it didn't work.


Takashi


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If flattening out C++ or Java code to make your application fit in a
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