Infineon DPS310 Barometer

- used as the primary barometer on the mRo Control Zero F7

src/drivers/barometer/dps310/DPS310_SPI.cpp

@@ -0,0 +1,104 @@
+/****************************************************************************
+ *
+ *   Copyright (c) 2019 PX4 Development Team. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name PX4 nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/**
+ * @file DPS310_SPI.cpp
+ *
+ * SPI interface for DPS310
+ */
+
+#include <lib/drivers/device/spi.h>
+
+namespace dps310
+{
+
+/* SPI protocol address bits */
+#define DIR_READ			(1<<7)
+#define DIR_WRITE			(0<<7)
+
+device::Device *DPS310_SPI_interface(uint8_t bus, uint32_t device);
+
+class DPS310_SPI : public device::SPI
+{
+public:
+	DPS310_SPI(uint8_t bus, uint32_t device);
+	virtual ~DPS310_SPI() = default;
+
+	virtual int	read(unsigned address, void *data, unsigned count);
+	virtual int	write(unsigned address, void *data, unsigned count);
+
+};
+
+device::Device *
+DPS310_SPI_interface(uint8_t bus, uint32_t device)
+{
+	return new DPS310_SPI(bus, device);
+}
+
+DPS310_SPI::DPS310_SPI(uint8_t bus, uint32_t device) :
+	SPI("DPS310_SPI", nullptr, bus, device, SPIDEV_MODE3, 10 * 1000 * 1000)
+{
+}
+
+int
+DPS310_SPI::read(unsigned address, void *data, unsigned count)
+{
+	uint8_t buf[32];
+
+	if (sizeof(buf) < (count + 1)) {
+		return -EIO;
+	}
+
+	buf[0] = address | DIR_READ;
+
+	int ret = transfer(&buf[0], &buf[0], count + 1);
+	memcpy(data, &buf[1], count);
+	return ret;
+}
+
+int
+DPS310_SPI::write(unsigned address, void *data, unsigned count)
+{
+	uint8_t buf[32];
+
+	if (sizeof(buf) < (count + 1)) {
+		return -EIO;
+	}
+
+	buf[0] = address | DIR_WRITE;
+	memcpy(&buf[1], data, count);
+
+	return transfer(&buf[0], &buf[0], count + 1);
+}
+
+} // namespace dps310