Revision 2:ea5a4c22bd53, committed 2014-12-05

Comitter:

fblanc

Date:

Fri Dec 05 14:06:38 2014 +0000

Parent:

1:7b36e4381d83

Commit message:

Compatible hal freescale K64F

Changed in this revision

diff -r 7b36e4381d83 -r ea5a4c22bd53 AnalogIn_Diff.h
--- 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
+
+

diff -r 7b36e4381d83 -r ea5a4c22bd53 AnalohIn_Diff.cpp
--- a/AnalohIn_Diff.cpp	Thu May 22 17:40:21 2014 +0000
+++ b/AnalohIn_Diff.cpp	Fri Dec 05 14:06:38 2014 +0000
@@ -1,33 +1,80 @@
-#include "mbed.h"
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * 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.
+ */
+
 #include "AnalogIn_Diff.h"
 
-
-AnalogIn_Diff::AnalogIn_Diff(int a2d_number) : ch(a2d_number) {
-    if(ch) BW_SIM_SCGC3_ADC1(1); // Turn on clock as needed
-    else BW_SIM_SCGC6_ADC0(1);
-    BW_ADC_SC1n_DIFF(ch, 0, 1);     //  Differential Mode
-    BW_ADC_CFG1_ADICLK(ch, 0);      //  Bus Clock
-    BW_ADC_CFG1_MODE(ch, 3);        //  16Bit differential mode
-    BW_ADC_CFG1_ADLSMP(ch, 0);      //  Short Sample Window 
-    BW_ADC_CFG1_ADIV(ch, 3);        //  Clock / 8
-    BW_ADC_CFG1_ADLPC(ch, 0);       //  Normal Power Mode
-}
+#if FSL_FEATURE_ADC_HAS_DIFF_MODE
 
 AnalogIn_Diff::~AnalogIn_Diff() { }
 
-int16_t AnalogIn_Diff::read_16(int channel) {  // Returns a 16bit signed integer
-    BW_ADC_SC1n_ADCH(ch, 0, channel);      //  Trigger Conversion
-    while(!BR_ADC_SC1n_COCO(ch, 0));    //  Wait for conversion to finish
-    return(BR_ADC_Rn_D(ch, 0));         //  Return the result
+AnalogIn_Diff::AnalogIn_Diff(int adc_ch)
+{
+    const uint32_t temp[] = ADC_BASE_ADDRS;
+    for (int i = 0; i < sizeof(temp) / sizeof(temp[0]); i++)
+        adc_addrs[i] = temp[i];
+
+    
+    instance=(adc_ch>>1)&1;
+    chnNum=(adc_ch>>0)&1;
+            
+    
+    CLOCK_SYS_EnableAdcClock(instance);
+
+    uint32_t bus_clock;
+    CLOCK_SYS_GetFreq(kBusClock, &bus_clock);
+    uint32_t clkdiv;
+    for (clkdiv = 0; clkdiv < 4; clkdiv++) {
+        if ((bus_clock >> clkdiv) <= MAX_FADC)
+            break;
+    }
+    if (clkdiv == 4) {
+        clkdiv = 0x3; //Set max div
+    }
+
+    /* adc is enabled/triggered when reading. */
+
+    ADC_HAL_Init(adc_addrs[instance]);
+    ADC_HAL_SetClkSrcMode(adc_addrs[instance], kAdcClkSrcOfBusClk);
+    ADC_HAL_SetClkDividerMode(adc_addrs[instance], (adc_clk_divider_mode_t)(clkdiv & 0x3));
+    ADC_HAL_SetRefVoltSrcMode(adc_addrs[instance], kAdcRefVoltSrcOfVref);
+    ADC_HAL_SetResolutionMode(adc_addrs[instance], kAdcResolutionBitOfDiffModeAs16);
+    ADC_HAL_SetContinuousConvCmd(adc_addrs[instance], false);
+    ADC_HAL_SetHwTriggerCmd(adc_addrs[instance], false); /* sw trigger */
+    ADC_HAL_SetHwAverageCmd(adc_addrs[instance], false);
+    //ADC_HAL_SetHwAverageMode(adc_addrs[instance], kAdcHwAverageCountOf4);
+    ADC_HAL_SetChnMuxMode(adc_addrs[instance], kAdcChnMuxOfB); /* only B channels are avail */
+
+
 }
 
-float AnalogIn_Diff::read(int channel) {
-    int16_t i;
-    float t;
-    BW_ADC_SC1n_ADCH(ch, 0, channel);
-    while(!BR_ADC_SC1n_COCO(ch, 0));
-    i =  BR_ADC_Rn_D(ch, 0);
-    t = ((float) i);
-    t = t / 32768.0f;
-    return(t);
+
+
+
+int16_t AnalogIn_Diff::read_raws16()    // Returns a 16bit signed integer
+{
+    /* sw trigger (SC1A) */
+    ADC_HAL_ConfigChn(adc_addrs[instance], 0, false, true, chnNum);
+    while (!ADC_HAL_GetChnConvCompletedCmd(adc_addrs[instance], 0));
+    return ADC_HAL_GetChnConvValueRAW(adc_addrs[instance], 0);
 }
+
+float AnalogIn_Diff::read()
+{
+    int16_t value = read_raws16();
+    return (float)value * (1.0f / (float)0xFFFF);
+}
+
+#endif // FSL_FEATURE_ADC_HAS_DIFF_MODE