Diff: AnalogIn_Diff.h

Revision:

2:ea5a4c22bd53

Parent:

1:7b36e4381d83

Child:

3:d17541ceae12

--- a/AnalogIn_Diff.h	Thu May 22 17:40:21 2014 +0000
+++ b/AnalogIn_Diff.h	Fri Dec 05 14:06:38 2014 +0000
@@ -1,26 +1,123 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ * Copyright (c) 2014 LAAS-CNRS
+ *
+ * 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.
+ */
 
-#ifndef K64F_DIFF_A2D_H
-#define K64F_DIFF_A2D_H
+#ifndef ANALOGIN_DIFF_H
+#define ANALOGIN_DIFF_H
+
+#include "mbed_assert.h"
+#include "analogin_api.h"
+#include "platform.h"
+#include "cmsis.h"
+#include "pinmap.h"
+#include "PeripheralNames.h"
+#include "fsl_adc_hal.h"
+#include "fsl_clock_manager.h"
+#include "PeripheralPins.h"
+#include "fsl_device_registers.h"
+
+#define VERSION_ADC_DIFF "2014_12_05"
+
+#if FSL_FEATURE_ADC_HAS_DIFF_MODE
+
+#define MAX_FADC 6000000
+#define ADC_DIFF(adc,ch) (((adc)<<1) | (ch)) 
+//adc ch -> ADC Diff pin+ ADC<adc>_DP<ch> and pin- ADC<adc>_DM<ch>
+
 
-#include "mbed.h"
-
+/** class of AnalogIn_Diff for K64F
+ * Example:
+ * @code
+ * #include "mbed.h"
+ * #include "AnalogIn_Diff.h"
+ * Ticker flipperADC;
+ * bool flag_TX=false;
+ * void flipADC()
+ * {
+ *     flag_TX=true;
+ * }
+ * int main()
+ * {
+ *   flipperADC.attach(&flipADC, 1.0);
+ *   AnalogIn_Diff adc_diff(ADC_DIFF(0,1)); // ADC Diff pin+ ADC0_DP1 and pin- ADC0_DM1
+ *   while (true) {
+ *       if(flag_TX) {
+ *           pc.printf("analog= %f \r\n",adc_diff.read()); //-0.5 < analog < 0.5 ; (-0.5 # ADC0_DP1=0.0V ADC0_DM1=3.3V) (0.0 # ADC0_DP1=1.65V ADC0_DM1=1.65V) (0.5 # ADC0_DP1=3.3V ADC0_DM1=0.0V)
+ *           flag_TX=false;
+ *       }
+ *  }
+ * }
+ * @endcode
+ */
 
 class AnalogIn_Diff
 {
+
 public:
-  AnalogIn_Diff(int a2d_number);
+    /** Create an AnalogIn_Diff
+     *
+     * @param adc_ch is ADC_DIFF(#adc, #ch)
+     *
+     */
+    AnalogIn_Diff(int adc_ch);
+
+    /** Destroy an AnalogIn_Diff
+     */
+    ~AnalogIn_Diff();
+
+    /** Read the input voltage, represented as a float range [-0.5 ; 0.5]
+     *
+     * @returns A floating-point value representing the current input voltage, measured as a percentage
+     */
+    float read();
 
-  /**
-  * AnalogIn_Diff destructor
-  */
-  ~AnalogIn_Diff();
-   int16_t read_16(int channel);
-   float read(int channel);
-   
+    /** Read the input voltage, represented as an 16-bit Signed 2's complement
+     *
+     * @returns
+     *   16-bit signed representing the current input voltage, normalised to a 16-bit signed
+     */
+    int16_t read_raws16();
+
+#ifdef MBED_OPERATORS
+    /** An operator shorthand for read()
+     *
+     * The float() operator can be used as a shorthand for read() to simplify common code sequences
+     *
+     * Example:
+     * @code
+     * float x = volume.read();
+     * float x = volume;
+     *
+     * if(volume.read() > 0.25) { ... }
+     * if(volume > 0.25) { ... }
+     * @endcode
+     */
+    operator float() {
+        return read();
+    }
+
+#endif //MBED_OPERATORS
+
 private:
-
-  int ch;
-
+    uint8_t chnNum;
+    uint32_t instance ;
+    uint32_t adc_addrs[];
 };
 
-#endif
\ No newline at end of file
+#endif //FSL_FEATURE_ADC_HAS_DIFF_MODE
+#endif //ANALOGIN_DIFF_H
+
+