Import Mbed OS hard-float snapshot

targets/TARGET_STM/TARGET_STM32L5/analogout_device.c

@@ -0,0 +1,136 @@
+/* mbed Microcontroller Library
+ * SPDX-License-Identifier: BSD-3-Clause
+ ******************************************************************************
+ *
+ * Copyright (c) 2015 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ *                        opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+#include "mbed_assert.h"
+#include "analogout_api.h"
+
+#if DEVICE_ANALOGOUT
+
+#include "cmsis.h"
+#include "pinmap.h"
+#include "mbed_error.h"
+#include "PeripheralPins.h"
+
+// These variables are used for the "free" function
+static int channel1_used = 0;
+static int channel2_used = 0;
+
+#if STATIC_PINMAP_READY
+#define ANALOGOUT_INIT_DIRECT analogout_init_direct
+void analogout_init_direct(dac_t *obj, const PinMap *pinmap)
+#else
+#define ANALOGOUT_INIT_DIRECT _analogout_init_direct
+static void _analogout_init_direct(dac_t *obj, const PinMap *pinmap)
+#endif
+{
+    DAC_ChannelConfTypeDef sConfig = {0};
+
+    // Get the peripheral name from the pin and assign it to the object
+    obj->dac = (DACName)pinmap->peripheral;
+    MBED_ASSERT(obj->dac != (DACName)NC);
+
+    // Get the pin function and assign the used channel to the object
+    uint32_t function = (uint32_t)pinmap->function;
+    MBED_ASSERT(function != (uint32_t)NC);
+
+    switch (STM_PIN_CHANNEL(function)) {
+        case 1:
+            obj->channel = DAC_CHANNEL_1;
+            break;
+#if defined(DAC_CHANNEL_2)
+        case 2:
+            obj->channel = DAC_CHANNEL_2;
+            break;
+#endif
+        default:
+            error("Unknown DAC channel");
+            break;
+    }
+
+    // Configure GPIO
+    pin_function(pinmap->pin, pinmap->function);
+    pin_mode(pinmap->pin, PullNone);
+
+    // Save the pin for future use
+    obj->pin = pinmap->pin;
+
+    // Enable DAC clock
+    __HAL_RCC_DAC1_CLK_ENABLE();
+
+    // Configure DAC
+    obj->handle.Instance = DAC;
+    obj->handle.State = HAL_DAC_STATE_RESET;
+
+    if (HAL_DAC_Init(&obj->handle) != HAL_OK) {
+        error("HAL_DAC_Init failed");
+    }
+
+    sConfig.DAC_SampleAndHold = DAC_SAMPLEANDHOLD_DISABLE;
+    sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
+    sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
+    sConfig.DAC_ConnectOnChipPeripheral = DAC_CHIPCONNECT_DISABLE;
+    sConfig.DAC_UserTrimming = DAC_TRIMMING_FACTORY;
+
+    if (obj->channel == DAC_CHANNEL_1) {
+        channel1_used = 1;
+    } else { // channel 1 per default
+        channel2_used = 1;
+    }
+
+    if (HAL_DAC_ConfigChannel(&obj->handle, &sConfig, obj->channel) != HAL_OK) {
+        error("Cannot configure DAC channel\n");
+    }
+
+    analogout_write_u16(obj, 0);
+}
+
+void analogout_init(dac_t *obj, PinName pin)
+{
+    int peripheral = (int)pinmap_peripheral(pin, PinMap_DAC);
+    int function = (int)pinmap_find_function(pin, PinMap_DAC);
+
+    const PinMap static_pinmap = {pin, peripheral, function};
+
+    ANALOGOUT_INIT_DIRECT(obj, &static_pinmap);
+}
+
+void analogout_free(dac_t *obj)
+{
+    // Reset DAC and disable clock
+    if (obj->channel == DAC_CHANNEL_1) {
+        channel1_used = 0;
+    }
+#if defined(DAC_CHANNEL_2)
+    if (obj->channel == DAC_CHANNEL_2) {
+        channel2_used = 0;
+    }
+#endif
+
+    if ((channel1_used == 0) && (channel2_used == 0)) {
+        __HAL_RCC_DAC1_FORCE_RESET();
+        __HAL_RCC_DAC1_RELEASE_RESET();
+        __HAL_RCC_DAC1_CLK_DISABLE();
+    }
+
+    // Configure GPIO
+    pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
+}
+
+const PinMap *analogout_pinmap()
+{
+    return PinMap_DAC;
+}
+
+#endif // DEVICE_ANALOGOUT