[update] add drivers for stm32mp1.

components/drivers/Kconfig

@@ -111,6 +111,10 @@ config RT_USING_ADC
     bool "Using ADC device drivers"
     default n
 
+config RT_USING_DAC
+    bool "Using DAC device drivers"
+    default n
+    
 config RT_USING_PWM
     bool "Using PWM device drivers"
     default n

components/drivers/include/drivers/dac.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-06-19     thread-liu   the first version
+ */
+
+#ifndef __DAC_H__
+#define __DAC_H__
+#include <rtthread.h>
+
+struct rt_dac_device;
+struct rt_dac_ops
+{
+    rt_err_t (*disabled)(struct rt_dac_device *device, rt_uint32_t channel);
+    rt_err_t (*enabled)(struct rt_dac_device *device, rt_uint32_t channel);
+    rt_err_t (*convert)(struct rt_dac_device *device, rt_uint32_t channel, rt_uint32_t *value);
+};
+
+struct rt_dac_device
+{
+    struct rt_device parent;
+    const struct rt_dac_ops *ops;
+};
+typedef struct rt_dac_device *rt_dac_device_t;
+
+typedef enum
+{
+    RT_dac_CMD_ENABLE,
+    RT_dac_CMD_DISABLE,
+} rt_dac_cmd_t;
+
+rt_err_t rt_hw_dac_register(rt_dac_device_t dac,const char *name, const struct rt_dac_ops *ops, const void *user_data);
+
+rt_uint32_t rt_dac_write(rt_dac_device_t dev, rt_uint32_t channel, rt_uint32_t value);
+rt_err_t rt_dac_enable(rt_dac_device_t dev, rt_uint32_t channel);
+rt_err_t rt_dac_disable(rt_dac_device_t dev, rt_uint32_t channel);
+
+#endif /* __dac_H__ */

components/drivers/include/rtdevice.h

@@ -103,6 +103,10 @@ extern "C" {
 #include "drivers/adc.h"
 #endif
 
+#ifdef RT_USING_DAC
+#include "drivers/dac.h"
+#endif
+
 #ifdef RT_USING_PWM
 #include "drivers/rt_drv_pwm.h"
 #endif

components/drivers/misc/SConscript

@@ -11,6 +11,9 @@ if GetDepend(['RT_USING_PIN']):
 if GetDepend(['RT_USING_ADC']):
     src = src + ['adc.c']
     
+if GetDepend(['RT_USING_DAC']):
+    src = src + ['dac.c']
+
 if GetDepend(['RT_USING_PWM']):
     src = src + ['rt_drv_pwm.c']
     

components/drivers/misc/dac.c

@@ -0,0 +1,231 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-06-19     thread-liu   the first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include <string.h>
+#include <stdlib.h>
+
+#define DBG_TAG "dac"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+static rt_size_t _dac_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
+{
+    rt_err_t result = RT_EOK;
+    rt_size_t i;
+    struct rt_dac_device *dac = (struct rt_dac_device *)dev;
+    rt_uint32_t *value = (rt_uint32_t *)buffer;
+
+    for (i = 0; i < size; i += sizeof(int))
+    {
+        result = dac->ops->convert(dac, pos + i, value);
+        if (result != RT_EOK)
+        {
+            return 0;
+        }
+        value++;
+    }
+
+    return i;
+}
+
+static rt_err_t _dac_control(rt_device_t dev, int cmd, void *args)
+{
+    rt_err_t result = RT_EOK;
+    rt_dac_device_t dac = (struct rt_dac_device *)dev;
+
+    if (dac->ops->enabled == RT_NULL)
+    {
+        return -RT_ENOSYS;
+    }
+    if (cmd == RT_dac_CMD_ENABLE)
+    {
+        result = dac->ops->enabled(dac, (rt_uint32_t)args);
+    }
+    else if (cmd == RT_dac_CMD_DISABLE)
+    {
+        result = dac->ops->disabled(dac, (rt_uint32_t)args);
+    }
+
+    return result;
+}
+
+#ifdef RT_USING_DEVICE_OPS
+const static struct rt_device_ops dac_ops =
+{
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    _dac_write,
+    _dac_control,
+};
+#endif
+
+rt_err_t rt_hw_dac_register(rt_dac_device_t device, const char *name, const struct rt_dac_ops *ops, const void *user_data)
+{
+    rt_err_t result = RT_EOK;
+    RT_ASSERT(ops != RT_NULL && ops->convert != RT_NULL);
+
+    device->parent.type = RT_Device_Class_Miscellaneous;
+    device->parent.rx_indicate = RT_NULL;
+    device->parent.tx_complete = RT_NULL;
+
+#ifdef RT_USING_DEVICE_OPS
+    device->parent.ops         = &dac_ops;
+#else
+    device->parent.init        = RT_NULL;
+    device->parent.open        = RT_NULL;
+    device->parent.close       = RT_NULL;
+    device->parent.read        = RT_NULL;
+    device->parent.write       = _dac_write;
+    device->parent.control     = _dac_control;
+#endif
+    device->ops = ops;
+    device->parent.user_data = (void *)user_data;
+
+    result = rt_device_register(&device->parent, name, RT_DEVICE_FLAG_RDWR);
+
+    return result;
+}
+
+rt_uint32_t rt_dac_write(rt_dac_device_t dev, rt_uint32_t channel, rt_uint32_t value)
+{
+    RT_ASSERT(dev);
+
+    dev->ops->convert(dev, channel, &value);
+
+    return RT_EOK;
+}
+
+rt_err_t rt_dac_enable(rt_dac_device_t dev, rt_uint32_t channel)
+{
+    rt_err_t result = RT_EOK;
+
+    RT_ASSERT(dev);
+    if (dev->ops->enabled != RT_NULL)
+    {
+        result = dev->ops->enabled(dev, channel);
+    }
+    else
+    {
+        result = -RT_ENOSYS;
+    }
+
+    return result;
+}
+
+rt_err_t rt_dac_disabled(rt_dac_device_t dev, rt_uint32_t channel)
+{
+    rt_err_t result = RT_EOK;
+
+    RT_ASSERT(dev);
+    if (dev->ops->disabled != RT_NULL)
+    {
+        result = dev->ops->disabled(dev, channel);
+    }
+    else
+    {
+        result = -RT_ENOSYS;
+    }
+
+    return result;
+}
+
+#ifdef FINSH_USING_MSH
+
+static int dac(int argc, char **argv)
+{
+    int result = RT_EOK;
+    static rt_dac_device_t dac_device = RT_NULL;
+    char *result_str;
+    
+    if (argc > 1)
+    {
+        if (!strcmp(argv[1], "probe"))
+        {
+            if (argc == 3)
+            {
+                dac_device = (rt_dac_device_t)rt_device_find(argv[2]);
+                result_str = (dac_device == RT_NULL) ? "failure" : "success";
+                rt_kprintf("probe %s %s \n", argv[2], result_str);
+            }
+            else
+            {
+                rt_kprintf("dac probe <dac_name>   - probe dac by name\n");
+            }
+        }
+        else
+        {
+            if (dac_device == RT_NULL)
+            {
+                rt_kprintf("Please using 'dac probe <dac_name>' first\n");
+                return -RT_ERROR;
+            }
+            if (!strcmp(argv[1], "enable"))
+            {
+                if (argc == 3)
+                {
+                    result = rt_dac_enable(dac_device, atoi(argv[2]));
+                    result_str = (result == RT_EOK) ? "success" : "failure";
+                    rt_kprintf("%s channel %d enables %s \n", dac_device->parent.parent.name, atoi(argv[2]), result_str);
+                }
+                else
+                {
+                    rt_kprintf("dac enable <channel>   - enable dac channel\n");
+                }
+            }
+            else if (!strcmp(argv[1], "write"))
+            {
+                if (argc == 4)
+                {
+                    rt_dac_write(dac_device, atoi(argv[2]), atoi(argv[3]));
+                    rt_kprintf("%s channel %d write value is %d \n", dac_device->parent.parent.name, atoi(argv[2]), atoi(argv[3]));
+                }
+                else
+                {
+                    rt_kprintf("dac write <channel> <value>     - write dac value on the channel\n");
+                }
+            }
+            else if (!strcmp(argv[1], "disable"))
+            {
+                if (argc == 3)
+                {
+                    result = rt_dac_disabled(dac_device, atoi(argv[2]));
+                    result_str = (result == RT_EOK) ? "success" : "failure";
+                    rt_kprintf("%s channel %d disable %s \n", dac_device->parent.parent.name, atoi(argv[2]), result_str);
+                }
+                else
+                {
+                    rt_kprintf("dac disable <channel>  - disable dac channel\n");
+                }
+            }
+            else
+            {
+                rt_kprintf("Unknown command. Please enter 'dac' for help\n");
+            }
+        }
+    }
+    else
+    {
+        rt_kprintf("Usage: \n");
+        rt_kprintf("dac probe <dac_name>           - probe dac by name\n");
+        rt_kprintf("dac write <channel> <value>    - write dac value on the channel\n");
+        rt_kprintf("dac disable <channel>          - disable dac channel\n");
+        rt_kprintf("dac enable <channel>           - enable dac channel\n");
+        result = -RT_ERROR;
+    }
+    return RT_EOK;
+}
+MSH_CMD_EXPORT(dac, dac function);
+
+#endif /* FINSH_USING_MSH */