diff options
Diffstat (limited to 'os/various/devices_lib/accel/lis302dl.c')
| -rw-r--r-- | os/various/devices_lib/accel/lis302dl.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/os/various/devices_lib/accel/lis302dl.c b/os/various/devices_lib/accel/lis302dl.c new file mode 100644 index 000000000..14e2a0ad1 --- /dev/null +++ b/os/various/devices_lib/accel/lis302dl.c @@ -0,0 +1,119 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+
+ 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 lis302dl.c
+ * @brief LIS302DL MEMS interface module through SPI code.
+ *
+ * @addtogroup lis302dl
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+#include "lis302dl.h"
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+static uint8_t txbuf[2];
+static uint8_t rxbuf[2];
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Reads a register value.
+ * @pre The SPI interface must be initialized and the driver started.
+ *
+ * @param[in] spip pointer to the SPI initerface
+ * @param[in] reg register number
+ * @return The register value.
+ */
+uint8_t lis302dlReadRegister(SPIDriver *spip, uint8_t reg) {
+
+ spiSelect(spip);
+ txbuf[0] = 0x80 | reg;
+ txbuf[1] = 0xff;
+ spiExchange(spip, 2, txbuf, rxbuf);
+ spiUnselect(spip);
+ return rxbuf[1];
+}
+
+/**
+ * @brief Writes a value into a register.
+ * @pre The SPI interface must be initialized and the driver started.
+ *
+ * @param[in] spip pointer to the SPI initerface
+ * @param[in] reg register number
+ * @param[in] value the value to be written
+ */
+void lis302dlWriteRegister(SPIDriver *spip, uint8_t reg, uint8_t value) {
+
+ switch (reg) {
+ default:
+ /* Reserved register must not be written, according to the datasheet
+ this could permanently damage the device.*/
+ chDbgAssert(FALSE, "lis302dlWriteRegister(), #1", "reserved register");
+ case LIS302DL_WHO_AM_I:
+ case LIS302DL_HP_FILTER_RESET:
+ case LIS302DL_STATUS_REG:
+ case LIS302DL_OUTX:
+ case LIS302DL_OUTY:
+ case LIS302DL_OUTZ:
+ case LIS302DL_FF_WU_SRC1:
+ case LIS302DL_FF_WU_SRC2:
+ case LIS302DL_CLICK_SRC:
+ /* Read only registers cannot be written, the command is ignored.*/
+ return;
+ case LIS302DL_CTRL_REG1:
+ case LIS302DL_CTRL_REG2:
+ case LIS302DL_CTRL_REG3:
+ case LIS302DL_FF_WU_CFG1:
+ case LIS302DL_FF_WU_THS1:
+ case LIS302DL_FF_WU_DURATION1:
+ case LIS302DL_FF_WU_CFG2:
+ case LIS302DL_FF_WU_THS2:
+ case LIS302DL_FF_WU_DURATION2:
+ case LIS302DL_CLICK_CFG:
+ case LIS302DL_CLICK_THSY_X:
+ case LIS302DL_CLICK_THSZ:
+ case LIS302DL_CLICK_TIMELIMIT:
+ case LIS302DL_CLICK_LATENCY:
+ case LIS302DL_CLICK_WINDOW:
+ spiSelect(spip);
+ txbuf[0] = reg;
+ txbuf[1] = value;
+ spiSend(spip, 2, txbuf);
+ spiUnselect(spip);
+ }
+}
+
+/** @} */
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