Diff: targets/hal/TARGET_STM/TARGET_STM32L0/analogout_api.c

Revision:

144:ef7eb2e8f9f7

Parent:

8:69ce7aaad4c4

--- a/targets/hal/TARGET_STM/TARGET_STM32L0/analogout_api.c	Tue Aug 02 14:07:36 2016 +0000
+++ b/targets/hal/TARGET_STM/TARGET_STM32L0/analogout_api.c	Fri Sep 02 15:07:44 2016 +0100
@@ -1,158 +1,158 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2015, STMicroelectronics
- * 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 STMicroelectronics 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 "analogout_api.h"
-
-#if DEVICE_ANALOGOUT
-
-#include "cmsis.h"
-#include "pinmap.h"
-#include "mbed_error.h"
-#include "PeripheralPins.h"
-
-#define DAC_RANGE (0xFFF) // 12 bits
-#define DAC_NB_BITS  (12)
-
-static DAC_HandleTypeDef DacHandle;
-
-// These variables are used for the "free" function
-static int channel1_used = 0;
-static int channel2_used = 0;
-
-void analogout_init(dac_t *obj, PinName pin) {
-    DAC_ChannelConfTypeDef sConfig;
-
-    // Get the peripheral name from the pin and assign it to the object
-    obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
-    MBED_ASSERT(obj->dac != (DACName)NC);
-
-    // Get the pin function and assign the used channel to the object
-    uint32_t function = pinmap_function(pin, PinMap_DAC);
-    MBED_ASSERT(function != (uint32_t)NC);
-    obj->channel = STM_PIN_CHANNEL(function);
-
-    // Configure GPIO
-    pinmap_pinout(pin, PinMap_DAC);
-
-    // Save the pin for future use
-    obj->pin = pin;
-
-    // Enable DAC clock
-    __DAC_CLK_ENABLE();
-
-    // Configure DAC
-    DacHandle.Instance = DAC;
-
-    sConfig.DAC_Trigger      = DAC_TRIGGER_NONE;
-    sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
-
-#if defined(DAC_CHANNEL_2)
-    if (obj->channel == 2) {
-        if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2) != HAL_OK) {
-            error("Cannot configure DAC channel 2");
-        }
-        channel2_used = 1;
-    } else
-#endif
-    {
-        // channel 1 per default
-        if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1) != HAL_OK) {
-            error("Cannot configure DAC channel 1");
-        }
-        obj->channel = 1;
-        channel1_used = 1;
-    }
-
-    analogout_write_u16(obj, 0);
-}
-
-void analogout_free(dac_t *obj) {
-    // Reset DAC and disable clock
-    if (obj->channel == 1) channel1_used = 0;
-    if (obj->channel == 2) channel2_used = 0;
-
-    if ((channel1_used == 0) && (channel2_used == 0)) {
-        __DAC_FORCE_RESET();
-        __DAC_RELEASE_RESET();
-        __DAC_CLK_DISABLE();
-    }
-
-    // Configure GPIO
-    pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
-}
-
-static inline void dac_write(dac_t *obj, int value) {
-    if (obj->channel == 1) {
-        HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, (value & DAC_RANGE));
-        HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
-    }
-#if defined(DAC_CHANNEL_2)
-    if (obj->channel == 2) {
-        HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, (value & DAC_RANGE));
-        HAL_DAC_Start(&DacHandle, DAC_CHANNEL_2);
-    }
-#endif
-}
-
-static inline int dac_read(dac_t *obj) {
-    if (obj->channel == 1) {
-        return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
-    }
-#if defined(DAC_CHANNEL_2)
-    if (obj->channel == 2) {
-        return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
-    }
-#endif
-    return 0;
-}
-
-void analogout_write(dac_t *obj, float value) {
-    if (value < 0.0f) {
-        dac_write(obj, 0); // Min value
-    } else if (value > 1.0f) {
-        dac_write(obj, (int)DAC_RANGE); // Max value
-    } else {
-        dac_write(obj, (int)(value * (float)DAC_RANGE));
-    }
-}
-
-void analogout_write_u16(dac_t *obj, uint16_t value) {
-    dac_write(obj, value >> (16 - DAC_NB_BITS));
-}
-
-float analogout_read(dac_t *obj) {
-    uint32_t value = dac_read(obj);
-    return (float)value * (1.0f / (float)DAC_RANGE);
-}
-
-uint16_t analogout_read_u16(dac_t *obj) {
-    uint32_t value = dac_read(obj);
-    return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits
-}
-
-#endif // DEVICE_ANALOGOUT
+/* mbed Microcontroller Library
+ * Copyright (c) 2015, STMicroelectronics
+ * 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 STMicroelectronics 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 "analogout_api.h"
+
+#if DEVICE_ANALOGOUT
+
+#include "cmsis.h"
+#include "pinmap.h"
+#include "mbed_error.h"
+#include "PeripheralPins.h"
+
+#define DAC_RANGE (0xFFF) // 12 bits
+#define DAC_NB_BITS  (12)
+
+static DAC_HandleTypeDef DacHandle;
+
+// These variables are used for the "free" function
+static int channel1_used = 0;
+static int channel2_used = 0;
+
+void analogout_init(dac_t *obj, PinName pin) {
+    DAC_ChannelConfTypeDef sConfig;
+
+    // Get the peripheral name from the pin and assign it to the object
+    obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
+    MBED_ASSERT(obj->dac != (DACName)NC);
+
+    // Get the pin function and assign the used channel to the object
+    uint32_t function = pinmap_function(pin, PinMap_DAC);
+    MBED_ASSERT(function != (uint32_t)NC);
+    obj->channel = STM_PIN_CHANNEL(function);
+
+    // Configure GPIO
+    pinmap_pinout(pin, PinMap_DAC);
+
+    // Save the pin for future use
+    obj->pin = pin;
+
+    // Enable DAC clock
+    __DAC_CLK_ENABLE();
+
+    // Configure DAC
+    DacHandle.Instance = DAC;
+
+    sConfig.DAC_Trigger      = DAC_TRIGGER_NONE;
+    sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
+
+#if defined(DAC_CHANNEL_2)
+    if (obj->channel == 2) {
+        if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2) != HAL_OK) {
+            error("Cannot configure DAC channel 2");
+        }
+        channel2_used = 1;
+    } else
+#endif
+    {
+        // channel 1 per default
+        if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1) != HAL_OK) {
+            error("Cannot configure DAC channel 1");
+        }
+        obj->channel = 1;
+        channel1_used = 1;
+    }
+
+    analogout_write_u16(obj, 0);
+}
+
+void analogout_free(dac_t *obj) {
+    // Reset DAC and disable clock
+    if (obj->channel == 1) channel1_used = 0;
+    if (obj->channel == 2) channel2_used = 0;
+
+    if ((channel1_used == 0) && (channel2_used == 0)) {
+        __DAC_FORCE_RESET();
+        __DAC_RELEASE_RESET();
+        __DAC_CLK_DISABLE();
+    }
+
+    // Configure GPIO
+    pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
+}
+
+static inline void dac_write(dac_t *obj, int value) {
+    if (obj->channel == 1) {
+        HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, (value & DAC_RANGE));
+        HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
+    }
+#if defined(DAC_CHANNEL_2)
+    if (obj->channel == 2) {
+        HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, (value & DAC_RANGE));
+        HAL_DAC_Start(&DacHandle, DAC_CHANNEL_2);
+    }
+#endif
+}
+
+static inline int dac_read(dac_t *obj) {
+    if (obj->channel == 1) {
+        return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
+    }
+#if defined(DAC_CHANNEL_2)
+    if (obj->channel == 2) {
+        return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
+    }
+#endif
+    return 0;
+}
+
+void analogout_write(dac_t *obj, float value) {
+    if (value < 0.0f) {
+        dac_write(obj, 0); // Min value
+    } else if (value > 1.0f) {
+        dac_write(obj, (int)DAC_RANGE); // Max value
+    } else {
+        dac_write(obj, (int)(value * (float)DAC_RANGE));
+    }
+}
+
+void analogout_write_u16(dac_t *obj, uint16_t value) {
+    dac_write(obj, value >> (16 - DAC_NB_BITS));
+}
+
+float analogout_read(dac_t *obj) {
+    uint32_t value = dac_read(obj);
+    return (float)value * (1.0f / (float)DAC_RANGE);
+}
+
+uint16_t analogout_read_u16(dac_t *obj) {
+    uint32_t value = dac_read(obj);
+    return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits
+}
+
+#endif // DEVICE_ANALOGOUT