Diff: targets/TARGET_WIZNET/TARGET_W7500x/analogin_api.c

Revision:

149:156823d33999

Parent:

144:ef7eb2e8f9f7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_WIZNET/TARGET_W7500x/analogin_api.c	Fri Oct 28 11:17:30 2016 +0100
@@ -0,0 +1,117 @@
+/* mbed Microcontroller Library 
+ *******************************************************************************
+ * Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
+ * 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 of ARM Limited 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 HOLDER 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 "mbed_assert.h"
+#include "analogin_api.h"
+
+#if DEVICE_ANALOGIN
+
+#include "wait_api.h"
+#include "cmsis.h"
+#include "pinmap.h"
+#include "W7500x_adc.h"
+#include "PeripheralPins.h"
+
+
+ADC_TypeDef * AdcHandle;
+
+static int adc_inited = 0;
+
+void analogin_init(analogin_t *obj, PinName pin)
+{
+    // Get the peripheral name from the pin and assign it to the object
+    obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
+
+    MBED_ASSERT(obj->adc != (ADCName)NC);
+
+    // Configure GPIO
+    pinmap_pinout(pin, PinMap_ADC);
+
+    // Save pin number for the read function
+    obj->pin = pin;
+
+    // The ADC initialization is done once
+    if (adc_inited == 0) {
+        adc_inited = 1;
+
+        ADC_Init();
+    }
+}
+
+static inline uint16_t adc_read(analogin_t *obj)
+{
+    ADC_CH adc_ch;
+
+    switch (obj->pin) {
+        case PC_15:
+            adc_ch = ADC_CH0;
+            break;
+        case PC_14:
+            adc_ch = ADC_CH1;
+            break;
+        case PC_13:
+            adc_ch = ADC_CH2;
+            break;
+        case PC_12:
+            adc_ch = ADC_CH3;
+            break;
+        case PC_11:
+            adc_ch = ADC_CH4;
+            break;
+        case PC_10:
+            adc_ch = ADC_CH5;
+            break;
+        default:
+            return 0;
+    }
+
+    ADC_ChannelSelect(adc_ch);
+    ADC_Start();
+
+    // Wait end of conversion and get value
+    while(ADC_IsInterrupt());
+    return ADC_ReadData();
+}
+
+uint16_t analogin_read_u16(analogin_t *obj)
+{
+    uint16_t value = adc_read(obj);
+    // 12-bit to 16-bit conversion
+    return value;
+}
+
+float analogin_read(analogin_t *obj)
+{
+    uint16_t value = adc_read(obj);
+
+    return (float)value * (1.0f / (float)0xFFF); // 12 bits range
+}
+
+#endif