Rockbox open source high quality audio player as a Music Player Daemon
mpris
rockbox
mpd
libadwaita
audio
rust
zig
deno
adc-as3514.c: cosmetics
reduce indentation level, return early on error condition
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26063 a1c6a512-1295-4272-9138-f99709370657
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-24
firmware/target/arm/adc-as3514.c
+24
-24
firmware/target/arm/adc-as3514.c
···
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{
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unsigned short data = 0;
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-
if ((unsigned)channel < NUM_ADC_CHANNELS)
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-
{
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-
ascodec_lock();
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+
if ((unsigned)channel >= NUM_ADC_CHANNELS)
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+
return 0;
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-
/* Select channel */
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if (ascodec_write(AS3514_ADC_0, (channel << 4)) >= 0)
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{
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unsigned char buf[2];
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+
ascodec_lock();
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-
/*
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* The AS3514 ADC will trigger an interrupt when the conversion
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* is finished, if the corresponding enable bit in IRQ_ENRD2
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* is set.
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* Previously the code did not wait and this apparently did
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* not pose any problems, but this should be more correct.
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* Without the wait the data read back may be completely or
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* partially (first one of the two bytes) stale.
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*/
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ascodec_wait_adc_finished();
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+
/* Select channel */
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if (ascodec_write(AS3514_ADC_0, (channel << 4)) >= 0)
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+
{
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+
unsigned char buf[2];
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+
/*
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* The AS3514 ADC will trigger an interrupt when the conversion
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+
* is finished, if the corresponding enable bit in IRQ_ENRD2
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+
* is set.
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+
* Previously the code did not wait and this apparently did
46
+
* not pose any problems, but this should be more correct.
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+
* Without the wait the data read back may be completely or
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+
* partially (first one of the two bytes) stale.
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+
*/
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ascodec_wait_adc_finished();
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-
/* Read data */
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if (ascodec_readbytes(AS3514_ADC_0, 2, buf) >= 0)
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{
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data = (((buf[0] & 0x3) << 8) | buf[1]);
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}
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}
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-
ascodec_unlock();
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+
/* Read data */
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if (ascodec_readbytes(AS3514_ADC_0, 2, buf) >= 0)
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+
{
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+
data = (((buf[0] & 0x3) << 8) | buf[1]);
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+
}
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}
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+
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ascodec_unlock();
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return data;
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}