diff options
| author | Jens Arnold <amiconn@rockbox.org> | 2010-08-20 22:21:07 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2010-08-20 22:21:07 +0000 |
| commit | 0a080891e7b5849df2686df504c15b008ba8cc73 (patch) | |
| tree | 8ce9b18d1200fb1bcc52d5dc2c2ccea4a1901b30 /firmware/target | |
| parent | 43ccc1eef7a7dae532e36e5ee3fdd144637eb279 (diff) | |
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.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27850 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target')
| -rw-r--r-- | firmware/target/arm/ipod/1g2g/adc-ipod-1g2g.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/firmware/target/arm/ipod/1g2g/adc-ipod-1g2g.c b/firmware/target/arm/ipod/1g2g/adc-ipod-1g2g.c index cfeb78d198..37c719f2b1 100644 --- a/firmware/target/arm/ipod/1g2g/adc-ipod-1g2g.c +++ b/firmware/target/arm/ipod/1g2g/adc-ipod-1g2g.c @@ -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) |