motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 15:23:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

tmp105: Create API for TMP105 temperature sensor.

Browse source 
* Define enum for TMP105 registers
* Move tmp105_set() from I2C to TMP105 header
* Document units and range of temperature as preconditions

Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Alex Horn <alex.horn@cs.ox.ac.uk>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Alex Horn 2012-12-05 12:34:06 +00:00 • committed by Anthony Liguori
parent eac236ea7b
commit 2915efbfa8
3 changed files with 76 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

17
hw/tmp105.c
View file

@ -20,6 +20,7 @@
#include "hw.h"
#include "i2c.h"
#include "tmp105.h"
typedef struct {
I2CSlave i2c;
@ -92,22 +93,22 @@ static void tmp105_read(TMP105State *s)
}
switch (s->pointer & 3) {
case 0: /* Temperature */
case TMP105_REG_TEMPERATURE:
s->buf[s->len ++] = (((uint16_t) s->temperature) >> 8);
s->buf[s->len ++] = (((uint16_t) s->temperature) >> 0) &
(0xf0 << ((~s->config >> 5) & 3)); /* R */
break;
case 1: /* Configuration */
case TMP105_REG_CONFIG:
s->buf[s->len ++] = s->config;
break;
case 2: /* T_LOW */
case TMP105_REG_T_LOW:
s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 8;
s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 0;
break;
case 3: /* T_HIGH */
case TMP105_REG_T_HIGH:
s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 8;
s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 0;
break;
@ -117,10 +118,10 @@ static void tmp105_read(TMP105State *s)
static void tmp105_write(TMP105State *s)
{
switch (s->pointer & 3) {
case 0: /* Temperature */
case TMP105_REG_TEMPERATURE:
break;
case 1: /* Configuration */
case TMP105_REG_CONFIG:
if (s->buf[0] & ~s->config & (1 << 0)) /* SD */
printf("%s: TMP105 shutdown\n", __FUNCTION__);
s->config = s->buf[0];
@ -128,8 +129,8 @@ static void tmp105_write(TMP105State *s)
tmp105_alarm_update(s);
break;
case 2: /* T_LOW */
case 3: /* T_HIGH */
case TMP105_REG_T_LOW:
case TMP105_REG_T_HIGH:
if (s->len >= 3)
s->limit[s->pointer & 1] = (int16_t)
((((uint16_t) s->buf[0]) << 8) | s->buf[1]);