Update repo

freertos_driverlib_f28377s/device/driverlib/dac.c

@@ -0,0 +1,93 @@
+//###########################################################################
+//
+// FILE:   dac.c
+//
+// TITLE:  C28x DAC driver.
+//
+//###########################################################################
+// 
+// C2000Ware v5.04.00.00
+//
+// Copyright (C) 2024 Texas Instruments Incorporated - http://www.ti.com
+//
+// Redistribution and use in source and binary forms, with or without 
+// modification, are permitted provided that the following conditions 
+// are met:
+// 
+//   Redistributions of source code must retain the above copyright 
+//   notice, this list of conditions and the following disclaimer.
+// 
+//   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.
+// 
+//   Neither the name of Texas Instruments Incorporated 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.
+// $
+//###########################################################################
+
+#include "dac.h"
+
+//*****************************************************************************
+//
+// DAC_tuneOffsetTrim()
+//
+//*****************************************************************************
+
+void
+DAC_tuneOffsetTrim(uint32_t base, float32_t referenceVoltage)
+{
+    uint16_t oldOffsetTrim;
+    float32_t newOffsetTrim;
+
+    //
+    // Check the arguments.
+    //
+    ASSERT(DAC_isBaseValid(base));
+    ASSERT(referenceVoltage > 0.0F);
+
+    //
+    // Get the sign-extended offset trim value
+    //
+    oldOffsetTrim = (HWREGH(base + DAC_O_TRIM) & DAC_TRIM_OFFSET_TRIM_M);
+    oldOffsetTrim = ((oldOffsetTrim & (uint16_t)DAC_REG_BYTE_MASK) ^
+                    (uint16_t)0x80) - (uint16_t)0x80;
+
+    //
+    // Calculate new offset trim value if DAC is operating at a reference
+    // voltage other than 2.5v.
+    //
+    newOffsetTrim = ((float32_t)(2.5 / referenceVoltage) *
+                     (int16_t)oldOffsetTrim);
+
+    //
+    // Check if the new offset trim value is valid
+    //
+    ASSERT(((int16_t)newOffsetTrim > -129) && ((int16_t)newOffsetTrim < 128));
+
+    //
+    // Set the new offset trim value
+    //
+    EALLOW;
+    HWREGH(base + DAC_O_TRIM) = (HWREGH(base + DAC_O_TRIM) &
+                                 ~DAC_TRIM_OFFSET_TRIM_M) |
+                                 (int16_t)newOffsetTrim;
+
+    EDIS;
+
+}
+