diff options
| -rw-r--r-- | hw/i2c.h | 3 | ||||
| -rw-r--r-- | hw/tmp105.c | 17 | ||||
| -rw-r--r-- | hw/tmp105.h | 67 |
3 files changed, 76 insertions, 11 deletions
@@ -73,9 +73,6 @@ void *wm8750_dac_buffer(void *opaque, int samples); void wm8750_dac_commit(void *opaque); void wm8750_set_bclk_in(void *opaque, int new_hz); -/* tmp105.c */ -void tmp105_set(I2CSlave *i2c, int temp); - /* lm832x.c */ void lm832x_key_event(DeviceState *dev, int key, int state); diff --git a/hw/tmp105.c b/hw/tmp105.c index 8e8dbd9..9c67e64 100644 --- a/hw/tmp105.c +++ b/hw/tmp105.c @@ -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]); diff --git a/hw/tmp105.h b/hw/tmp105.h new file mode 100644 index 0000000..51eff4b --- /dev/null +++ b/hw/tmp105.h @@ -0,0 +1,67 @@ +/* + * Texas Instruments TMP105 Temperature Sensor + * + * Browse the data sheet: + * + * http://www.ti.com/lit/gpn/tmp105 + * + * Copyright (C) 2012 Alex Horn <alex.horn@cs.ox.ac.uk> + * Copyright (C) 2008-2012 Andrzej Zaborowski <balrogg@gmail.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * later. See the COPYING file in the top-level directory. + */ +#ifndef QEMU_TMP105_H +#define QEMU_TMP105_H + +#include "i2c.h" + +/** + * TMP105Reg: + * @TMP105_REG_TEMPERATURE: Temperature register + * @TMP105_REG_CONFIG: Configuration register + * @TMP105_REG_T_LOW: Low temperature register (also known as T_hyst) + * @TMP105_REG_T_HIGH: High temperature register (also known as T_OS) + * + * The following temperature sensors are + * compatible with the TMP105 registers: + * - adt75 + * - ds1775 + * - ds75 + * - lm75 + * - lm75a + * - max6625 + * - max6626 + * - mcp980x + * - stds75 + * - tcn75 + * - tmp100 + * - tmp101 + * - tmp105 + * - tmp175 + * - tmp275 + * - tmp75 + **/ +typedef enum TMP105Reg { + TMP105_REG_TEMPERATURE = 0, + TMP105_REG_CONFIG, + TMP105_REG_T_LOW, + TMP105_REG_T_HIGH, +} TMP105Reg; + +/** + * tmp105_set: + * @i2c: dispatcher to TMP105 hardware model + * @temp: temperature with 0.001 centigrades units in the range -40 C to +125 C + * + * Sets the temperature of the TMP105 hardware model. + * + * Bits 5 and 6 (value 32 and 64) in the register indexed by TMP105_REG_CONFIG + * determine the precision of the temperature. See Table 8 in the data sheet. + * + * @see_also: I2C_SLAVE macro + * @see_also: http://www.ti.com/lit/gpn/tmp105 + */ +void tmp105_set(I2CSlave *i2c, int temp); + +#endif |
