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-rw-r--r--os/various/devices_lib/sensors/hdc1000.c265
1 files changed, 265 insertions, 0 deletions
diff --git a/os/various/devices_lib/sensors/hdc1000.c b/os/various/devices_lib/sensors/hdc1000.c
new file mode 100644
index 0000000..39e47ec
--- /dev/null
+++ b/os/various/devices_lib/sensors/hdc1000.c
@@ -0,0 +1,265 @@
+/*
+ HDC100x for ChibiOS/RT - Copyright (C) 2016 Stephane D'Alu
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file HDC1000.c
+ * @brief HDC1000 interface module code.
+ *
+ * @addtogroup hdc1000
+ * @{
+ */
+
+#define I2C_HELPERS_AUTOMATIC_DRV TRUE
+
+#include "hal.h"
+#include "i2c_helpers.h"
+#include "hdc1000.h"
+
+/* DOC: http://www.ti.com/lit/ds/symlink/hdc1008.pdf
+ */
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/* I2C Register */
+#define HDC1000_REG_TEMP_HUMID 0x00
+#define HDC1000_REG_TEMP 0x00
+#define HDC1000_REG_HUMID 0x01
+#define HDC1000_REG_CONFIG 0x02
+#define HDC1000_REG_SERIAL 0xFB
+#define HDC1000_REG_SERIAL_1 0xFB
+#define HDC1000_REG_SERIAL_2 0xFC
+#define HDC1000_REG_SERIAL_3 0xFD
+#define HDC1000_REG_MANUF_ID 0xFE
+#define HDC1000_REG_DEVICE_ID 0xFF
+
+/* Configuration */
+#define HDC1000_CONFIG_RST (1 << 15)
+#define HDC1000_CONFIG_HEATER (1 << 13)
+#define HDC1000_CONFIG_MODE_ONE (0 << 12)
+#define HDC1000_CONFIG_MODE_BOTH (1 << 12)
+#define HDC1000_CONFIG_BATT (1 << 11)
+#define HDC1000_CONFIG_TRES_14 (0)
+#define HDC1000_CONFIG_TRES_11 (1 << 10)
+#define HDC1000_CONFIG_HRES_14 (0)
+#define HDC1000_CONFIG_HRES_11 (1 << 8)
+#define HDC1000_CONFIG_HRES_8 (1 << 9)
+
+/* Value */
+#define HDC1000_MANUF_ID 0x5449
+#define HDC1000_DEVICE_ID 0x1000
+
+/* Delay in micro seconds */
+#define HDC1000_DELAY_ACQUIRE_SAFETY 1000
+#define HDC1000_DELAY_ACQUIRE_TRES_14 6350
+#define HDC1000_DELAY_ACQUIRE_TRES_11 3650
+#define HDC1000_DELAY_ACQUIRE_HRES_14 6500
+#define HDC1000_DELAY_ACQUIRE_HRES_11 3850
+#define HDC1000_DELAY_ACQUIRE_HRES_8 2500
+#define HDC1000_DELAY_STARTUP 15000
+
+// Deefault config (high res)
+#define HDC1000_CONFIG_RES (HDC1000_CONFIG_TRES_14 | \
+ HDC1000_CONFIG_HRES_14)
+#define HDC1000_DELAY_ACQUIRE (HDC1000_DELAY_ACQUIRE_TRES_14 + \
+ HDC1000_DELAY_ACQUIRE_HRES_14)
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+static inline msg_t
+_apply_config(HDC1000_drv *drv) {
+ struct __attribute__((packed)) {
+ uint8_t reg;
+ uint16_t conf;
+ } tx = { HDC1000_REG_CONFIG, cpu_to_be16(drv->cfg) };
+
+ return i2c_send((uint8_t*)&tx, sizeof(tx));
+}
+
+static inline msg_t
+_decode_measure(HDC1000_drv *drv,
+ uint32_t val, float *temperature, float *humidity) {
+ (void)drv;
+
+ /* Temperature */
+ if (temperature) {
+ float temp = (val >> 16);
+ temp /= 65536;
+ temp *= 165;
+ temp -= 40;
+ *temperature = temp;
+ }
+
+ /* Humidiy */
+ if (humidity) {
+ float hum = (val & 0xFFFF);
+ hum /= 65535;
+ hum *= 100;
+ *humidity = hum;
+ }
+
+ /* ok */
+ return MSG_OK;
+}
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+void
+HDC1000_init(HDC1000_drv *drv, HDC1000_config *config) {
+ drv->config = config;
+ drv->cfg = HDC1000_CONFIG_RST | HDC1000_CONFIG_MODE_BOTH |
+ HDC1000_CONFIG_RES;
+ drv->delay = (HDC1000_DELAY_ACQUIRE +
+ HDC1000_DELAY_ACQUIRE_SAFETY) / 1000;
+ drv->state = SENSOR_INIT;
+}
+
+msg_t
+HDC1000_check(HDC1000_drv *drv) {
+ uint16_t manuf, device;
+
+ msg_t msg;
+ if (((msg = i2c_reg_recv16_be(HDC1000_REG_MANUF_ID, &manuf )) < MSG_OK) ||
+ ((msg = i2c_reg_recv16_be(HDC1000_REG_DEVICE_ID, &device)) < MSG_OK))
+ return msg;
+
+ if ((manuf != HDC1000_MANUF_ID) || (device != HDC1000_DEVICE_ID))
+ return SENSOR_NOTFOUND;
+
+ return MSG_OK;
+}
+
+
+msg_t
+HDC1000_start(HDC1000_drv *drv) {
+ osalDbgAssert((drv->state == SENSOR_INIT ) ||
+ (drv->state == SENSOR_ERROR ) ||
+ (drv->state == SENSOR_STOPPED),
+ "invalid state");
+ msg_t msg;
+ if ((msg = _apply_config(drv)) < MSG_OK) {
+ drv->state = SENSOR_ERROR;
+ return msg;
+ }
+ drv->state = SENSOR_STARTED;
+ return MSG_OK;
+}
+
+msg_t
+HDC1000_stop(HDC1000_drv *drv) {
+ drv->state = SENSOR_STOPPED;
+ return MSG_OK;
+}
+
+msg_t
+HDC1000_setHeater(HDC1000_drv *drv, bool on) {
+ if (on) { drv->cfg |= HDC1000_CONFIG_HEATER; }
+ else { drv->cfg &= ~HDC1000_CONFIG_HEATER; }
+
+ msg_t msg;
+ if ((msg = _apply_config(drv)) < MSG_OK) {
+ drv->state = SENSOR_ERROR;
+ return msg;
+ }
+ return MSG_OK;
+}
+
+msg_t
+HDC1000_startMeasure(HDC1000_drv *drv) {
+ msg_t msg;
+ osalDbgAssert(drv->state == SENSOR_STARTED, "invalid state");
+ if ((msg = i2c_reg(HDC1000_REG_TEMP_HUMID)) < MSG_OK)
+ return msg;
+ drv->state = SENSOR_MEASURING;
+ return MSG_OK;
+}
+
+
+msg_t
+HDC1000_readSerial(HDC1000_drv *drv, uint8_t *serial) {
+ msg_t msg;
+ osalDbgAssert(drv->state == SENSOR_STARTED, "invalid state");
+
+ if (((msg = i2c_reg_recv16(HDC1000_REG_SERIAL_1,
+ (uint16_t*)&serial[0])) < MSG_OK) ||
+ ((msg = i2c_reg_recv16(HDC1000_REG_SERIAL_2,
+ (uint16_t*)&serial[2])) < MSG_OK) ||
+ ((msg = i2c_reg_recv8 (HDC1000_REG_SERIAL_3,
+ (uint8_t*) &serial[4])) < MSG_OK))
+ return msg;
+ return MSG_OK;
+}
+
+
+msg_t
+HDC1000_readMeasure(HDC1000_drv *drv,
+ float *temperature, float *humidity) {
+ msg_t msg;
+ uint32_t val;
+
+ osalDbgAssert((drv->state == SENSOR_MEASURING) ||
+ (drv->state == SENSOR_READY ),
+ "invalid state");
+
+ if ((msg = i2c_recv32_be(&val)) < MSG_OK) {
+ drv->state = SENSOR_ERROR;
+ return msg;
+ }
+
+ drv->state = SENSOR_STARTED;
+
+ return _decode_measure(drv, val, temperature, humidity);
+}
+
+msg_t
+HDC1000_readTemperatureHumidity(HDC1000_drv *drv,
+ float *temperature, float *humidity) {
+ msg_t msg;
+ uint32_t val;
+
+ osalDbgAssert(drv->state == SENSOR_STARTED, "invalid state");
+
+ /* Request value */
+ if ((msg = i2c_reg(HDC1000_REG_TEMP_HUMID)) < MSG_OK)
+ return msg;
+
+ /* Wait */
+ osalThreadSleepMilliseconds(drv->delay);
+
+ /* Get value */
+ if ((msg = i2c_recv32_be(&val)) < MSG_OK) {
+ drv->state = SENSOR_ERROR;
+ return msg;
+ }
+
+ return _decode_measure(drv, val, temperature, humidity);
+}
+
+
+/** @} */
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