1 files changed, 154 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/drivers_ext/ds1624/ds1624.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/drivers_ext/ds1624/ds1624.c
new file mode 100644
index 0000000..ac4da3b
--- /dev/null
+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/drivers_ext/ds1624/ds1624.c
@@ -0,0 +1,154 @@
+/**
+ * Copyright (c) 2012 - 2018, Nordic Semiconductor ASA
+ * 
+ * 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, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, 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 of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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.
+ * 
+ */
+#include "ds1624.h"
+#include "twi_master.h"
+#include "nrf_delay.h"
+
+/*lint ++flb "Enter library region" */
+
+#define DS1634_BASE_ADDRESS 0x90 //!< 4 MSBs of the DS1624 TWI address
+
+#define DS1624_ONESHOT_MODE    0x01 //!< Bit in configuration register for 1-shot mode
+#define DS1624_CONVERSION_DONE 0x80 //!< Bit in configuration register to indicate completed temperature conversion
+
+static uint8_t m_device_address; //!< Device address in bits [7:1]
+
+const uint8_t command_access_memory      = 0x17; //!< Reads or writes to 256-byte EEPROM memory
+const uint8_t command_access_config      = 0xAC; //!< Reads or writes configuration data to configuration register
+const uint8_t command_read_temp          = 0xAA; //!< Reads last converted temperature value from temperature register
+const uint8_t command_start_convert_temp = 0xEE; //!< Initiates temperature conversion.
+const uint8_t command_stop_convert_temp  = 0x22; //!< Halts temperature conversion.
+
+/**
+ * @brief Function for reading the current configuration of the sensor.
+ *
+ * @return uint8_t Zero if communication with the sensor failed. Contents (always non-zero) of configuration register (@ref DS1624_ONESHOT_MODE and @ref DS1624_CONVERSION_DONE) if communication succeeded.
+ */
+static uint8_t ds1624_config_read(void)
+{
+    uint8_t config = 0;
+
+    // Write: command protocol
+    if (twi_master_transfer(m_device_address, (uint8_t*)&command_access_config, 1, TWI_DONT_ISSUE_STOP))
+    {
+        if (twi_master_transfer(m_device_address | TWI_READ_BIT, &config, 1, TWI_ISSUE_STOP)) // Read: current configuration
+        {
+            // Read succeeded, configuration stored to variable "config"
+        }
+        else
+        {
+            // Read failed
+            config = 0;
+        }
+    }
+
+    return config;
+}
+
+bool ds1624_init(uint8_t device_address)
+{
+    bool transfer_succeeded = true;
+    m_device_address = DS1634_BASE_ADDRESS + (uint8_t)(device_address << 1);
+
+    uint8_t config = ds1624_config_read();
+
+    if (config != 0)
+    {
+        // Configure DS1624 for 1SHOT mode if not done so already.
+        if (!(config & DS1624_ONESHOT_MODE))
+        {
+            uint8_t data_buffer[2];
+
+            data_buffer[0] = command_access_config;
+            data_buffer[1] = DS1624_ONESHOT_MODE;
+
+            transfer_succeeded &= twi_master_transfer(m_device_address, data_buffer, 2, TWI_ISSUE_STOP);
+        }
+    }
+    else
+    {
+        transfer_succeeded = false;
+    }
+
+    return transfer_succeeded;
+}
+
+bool ds1624_start_temp_conversion(void)
+{
+    return twi_master_transfer(m_device_address, (uint8_t*)&command_start_convert_temp, 1, TWI_ISSUE_STOP);
+}
+
+bool ds1624_is_temp_conversion_done(void)
+{
+    uint8_t config = ds1624_config_read();
+
+    if (config & DS1624_CONVERSION_DONE)
+    {
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+
+bool ds1624_temp_read(int8_t * temperature_in_celcius, int8_t * temperature_fraction)
+{
+    bool transfer_succeeded = false;
+
+    // Write: Begin read temperature command
+    if (twi_master_transfer(m_device_address, (uint8_t*)&command_read_temp, 1, TWI_DONT_ISSUE_STOP))
+    {
+        uint8_t data_buffer[2];
+
+        // Read: 2 temperature bytes to data_buffer
+        if (twi_master_transfer(m_device_address | TWI_READ_BIT, data_buffer, 2, TWI_ISSUE_STOP))
+        {
+            *temperature_in_celcius = (int8_t)data_buffer[0];
+            *temperature_fraction   = (int8_t)data_buffer[1];
+
+            transfer_succeeded = true;
+        }
+    }
+
+    return transfer_succeeded;
+}
+
+/*lint --flb "Leave library region" */