maemo.org - Talk - View Single Post - How to enable FM transmitter? (Solution in thread)

	qwerty12	2010-01-02 , 11:03
	Posts: 4,274 \| Thanked: 5,358 times \| Joined on Sep 2007 @ Looking at y'all and sighing	#28

Originally Posted by giannoug

Well.. I only ran this because you have many posts..
Code:
Nokia-N900-42-11:~# ./a.out
fcc

Hehe...

It returns "fcc" for me, too. Which is odd, because I was sure that was how they were disabling it (checking to see the region and then writing it to the sysfs entry); excerpt from the kernel driver:

PHP Code:


			
+int si4713_set_region_preemphasis(struct si4713_device *sdev, u8 preemphasis)

+{

+    int rval = 0;

+

+    switch (preemphasis) {

+    case PREEMPHASIS_USA:

+        preemphasis = FMPE_USA;

+        break;

+    case PREEMPHASIS_EU:

+        preemphasis = FMPE_EU;

+        break;

+    case PREEMPHASIS_DISABLED:

+        preemphasis = FMPE_DISABLED;

+        break;

+    default:

+        return -EINVAL;

+    }

+

And, then, when reading http://en.wikipedia.org/wiki/Pre-emphasis, it all made sense...

Best thing to do is attach a ltrace and strace log of fmtxd. Maybe someone can help you.

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