Added AnalogOut for STM32F407 Discovery

Author: darreno1

libraries/mbed/targets/hal/TARGET_STM/TARGET_DISCO_F407VG/PeripheralNames.h

@@ -40,6 +40,11 @@ typedef enum {
     ADC_1 = (int)ADC1_BASE
 } ADCName;
 
+typedef enum {
+    DAC_0 = 0,
+    DAC_1
+} DACName;
+
 typedef enum {
     UART_1 = (int)USART1_BASE,  
     UART_2 = (int)USART2_BASE,

libraries/mbed/targets/hal/TARGET_STM/TARGET_DISCO_F407VG/analogout_api.c

@@ -0,0 +1,160 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2014, 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 "analogout_api.h"
+
+#if DEVICE_ANALOGOUT
+
+#include "cmsis.h"
+#include "pinmap.h"
+#include "error.h"
+#include "stm32f4xx_hal.h"
+
+#define RANGE_12BIT (0xFFF)
+
+DAC_HandleTypeDef    DacHandle;
+static DAC_ChannelConfTypeDef sConfig;
+
+static const PinMap PinMap_DAC[] = {
+    {PA_4, DAC_0, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0xFF)}, // DAC_OUT1
+    {PA_5, DAC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0xFF)}, // DAC_OUT2
+    {NC,   NC,    0}
+};
+
+void analogout_init(dac_t *obj, PinName pin)
+{
+    uint32_t channel ;
+    HAL_StatusTypeDef status;
+
+    // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
+    obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
+
+    if (obj->dac == (DACName)NC) {
+        error("DAC pin mapping failed");
+    }
+
+    // Configure GPIO
+    pinmap_pinout(pin, PinMap_DAC);
+
+    // Save the channel for the write and read functions
+    obj->channel = pin;
+
+    __GPIOA_CLK_ENABLE();
+
+    __DAC_CLK_ENABLE();
+
+    DacHandle.Instance = DAC;
+
+    status = HAL_DAC_Init(&DacHandle);
+    if ( status != HAL_OK ) {
+        error("HAL_DAC_Init failed");
+    }
+
+    sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
+    sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
+
+    if (obj->channel == PA_4) {
+        channel = DAC_CHANNEL_1; 
+    } else {
+        channel = DAC_CHANNEL_2;
+    }
+
+    if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, channel) != HAL_OK) {
+        error("HAL_DAC_ConfigChannel failed");
+    }
+
+    if (HAL_DAC_Start(&DacHandle, channel) != HAL_OK) {
+        error("HAL_DAC_Start failed");
+    }
+
+    if (HAL_DAC_SetValue(&DacHandle, channel, DAC_ALIGN_12B_R, 0x000) != HAL_OK) {
+        error("HAL_DAC_SetValue failed");
+    }
+
+}
+
+void analogout_free(dac_t *obj)
+{
+}
+
+static inline void dac_write(dac_t *obj, uint16_t value)
+{
+    HAL_StatusTypeDef status;
+
+    if (obj->channel == PA_4) {
+        status = HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
+    } else if (obj->channel == PA_5) {
+        status = HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, value);
+    }
+
+    if ( status != HAL_OK ) {
+        error("ADC pin mapping failed");
+    }
+}
+
+static inline int dac_read(dac_t *obj)
+{
+    if (obj->channel == PA_4) {
+        return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
+    } else if (obj->channel == PA_5) {
+        return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
+    }
+}
+
+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, (uint16_t)RANGE_12BIT); // Max value
+    } else {
+        dac_write(obj, (uint16_t)(value * (float)RANGE_12BIT));
+    }
+}
+
+void analogout_write_u16(dac_t *obj, uint16_t value)
+{
+    if (value > (uint16_t)RANGE_12BIT) {
+        value = (uint16_t)RANGE_12BIT; // Max value
+    }
+
+    dac_write(obj, value);
+}
+
+float analogout_read(dac_t *obj)
+{
+
+    uint32_t value = dac_read(obj);
+    return (float)value * (1.0f / (float)RANGE_12BIT);
+}
+
+uint16_t analogout_read_u16(dac_t *obj)
+{
+    return (uint16_t)dac_read(obj);
+}
+
+#endif // DEVICE_ANALOGOUT

libraries/mbed/targets/hal/TARGET_STM/TARGET_DISCO_F407VG/device.h

@@ -37,7 +37,7 @@
 #define DEVICE_INTERRUPTIN      1
 
 #define DEVICE_ANALOGIN         1
-#define DEVICE_ANALOGOUT        0 // Not present on this device
+#define DEVICE_ANALOGOUT        1 
 
 #define DEVICE_SERIAL           1
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_DISCO_F407VG/objects.h

@@ -59,6 +59,11 @@ struct analogin_s {
     PinName pin;
 };
 
+struct dac_s {
+    DACName dac;
+    PinName channel;
+};
+
 struct serial_s {
     UARTName uart;
     int index; // Used by irq