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iPod 1st Gen: Fix battery ADC not working due to the EABI compiler optimizing the delay loops away. Use udelay() instead, not wasting CPU time when the CPU is not boosted.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27850 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2010-08-20 22:21:07 +00:00
parent 43ccc1eef7
commit 0a080891e7
1 changed files with 7 additions and 6 deletions
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13
firmware/target/arm/ipod/1g2g/adc-ipod-1g2g.c
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@ -25,6 +25,7 @@
#include "kernel.h"
#include "adc.h"
#include "adc-target.h"
#include "system-target.h"
static struct mutex adc_mtx SHAREDBSS_ATTR;
@ -41,24 +42,24 @@ unsigned short adc_scan(int channel)
if ((IPOD_HW_REVISION >> 16) == 1)
{
int i, j;
int i;
unsigned pval = GPIOB_OUTPUT_VAL;
GPIOB_OUTPUT_VAL = pval | 0x04; /* B2 -> high */
for (i = 32; i > 0; --i);
udelay(2);
GPIOB_OUTPUT_VAL = pval; /* B2 -> low */
for (i = 200; i > 0; --i);
udelay(10);
for (j = 0; j < 8; j++)
for (i = 0; i < 8; i++)
{
GPIOB_OUTPUT_VAL = pval | 0x02; /* B1 -> high */
for (i = 8; i > 0; --i);
udelay(1);
data = (data << 1) | ((GPIOB_INPUT_VAL & 0x08) >> 3);
GPIOB_OUTPUT_VAL = pval; /* B1 -> low */
for (i = 320; i > 0; --i);
udelay(15);
}
}
else if ((IPOD_HW_REVISION >> 16) == 2)