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Diffstat (limited to 'components/drivers/i2c/i2c_dev.c')
-rw-r--r--components/drivers/i2c/i2c_dev.c239
1 files changed, 126 insertions, 113 deletions
diff --git a/components/drivers/i2c/i2c_dev.c b/components/drivers/i2c/i2c_dev.c
index d1fc55567b..dff21d8e67 100644
--- a/components/drivers/i2c/i2c_dev.c
+++ b/components/drivers/i2c/i2c_dev.c
@@ -1,113 +1,126 @@
-#include <rtdevice.h>
-
-static rt_err_t i2c_bus_device_init(rt_device_t dev)
-{
- struct rt_i2c_bus_device* bus = (struct rt_i2c_bus_device *)dev->user_data;
- RT_ASSERT(bus != RT_NULL);
-
- return RT_EOK;
-}
-
-static rt_size_t i2c_bus_device_read (rt_device_t dev,
- rt_off_t pos,
- void *buffer,
- rt_size_t count)
-{
- rt_uint16_t addr;
- rt_uint16_t flags;
- struct rt_i2c_bus_device* bus = (struct rt_i2c_bus_device *)dev->user_data;
-
- RT_ASSERT(bus != RT_NULL);
- RT_ASSERT(buffer != RT_NULL);
-
- i2c_dbg("I2C bus dev [%s] reading %u bytes.\n", dev->parent.name, count);
-
- addr = pos & 0xffff;
- flags = (pos >> 16) & 0xffff;
-
- return rt_i2c_master_recv(bus, addr, flags, buffer, count);
-}
-
-
-static rt_size_t i2c_bus_device_write (rt_device_t dev,
- rt_off_t pos,
- const void *buffer,
- rt_size_t count)
-{
- rt_uint16_t addr;
- rt_uint16_t flags;
- struct rt_i2c_bus_device* bus = (struct rt_i2c_bus_device *)dev->user_data;
-
- RT_ASSERT(bus != RT_NULL);
- RT_ASSERT(buffer != RT_NULL);
-
- i2c_dbg("I2C bus dev writing %u bytes.\n", dev->parent.name, count);
-
- addr = pos & 0xffff;
- flags = (pos >> 16) & 0xffff;
-
- return rt_i2c_master_send(bus, addr, flags, buffer, count);
-}
-
-static rt_err_t i2c_bus_device_control(rt_device_t dev,
- rt_uint8_t cmd,
- void *args)
-{
- rt_err_t ret;
- struct rt_i2c_priv_data *priv_data;
- struct rt_i2c_bus_device* bus = (struct rt_i2c_bus_device *)dev->user_data;
-
- RT_ASSERT(bus != RT_NULL);
-
- switch (cmd)
- {
- case RT_I2C_DEV_CTRL_10BIT: /* set 10-bit addr mode */
- bus->flags |= RT_I2C_ADDR_10BIT;
- break;
- case RT_I2C_DEV_CTRL_ADDR:
- bus->addr = *(rt_uint16_t *)args;
- break;
- case RT_I2C_DEV_CTRL_TIMEOUT:
- bus->timeout = *(rt_uint32_t *)args;
- break;
- case RT_I2C_DEV_CTRL_RW:
- priv_data = (struct rt_i2c_priv_data *)args;
- ret = rt_i2c_transfer(bus, priv_data->msgs, priv_data->number);
- if (ret < 0)
- {
- return -RT_EIO;
- }
- break;
- default:
- break;
- }
-
- return RT_EOK;
-}
-
-
-rt_err_t rt_i2c_bus_device_device_init(struct rt_i2c_bus_device* bus,
- const char* name)
-{
- struct rt_device *device;
- RT_ASSERT(bus != RT_NULL);
-
- device = &bus->parent;
-
- device->user_data = bus;
-
- /* set device type */
- device->type = RT_Device_Class_I2CBUS;
- /* initialize device interface */
- device->init = i2c_bus_device_init;
- device->open = RT_NULL;
- device->close = RT_NULL;
- device->read = i2c_bus_device_read;
- device->write = i2c_bus_device_write;
- device->control = i2c_bus_device_control;
-
- /* register to device manager */
- rt_device_register(device, name, RT_DEVICE_FLAG_RDWR);
-
- return RT_EOK;
-}
+/*
+ * File : i2c_dev.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date Author Notes
+ * 2012-04-25 weety first version
+ */
+
+#include <rtdevice.h>
+
+static rt_err_t i2c_bus_device_init(rt_device_t dev)
+{
+ struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
+ RT_ASSERT(bus != RT_NULL);
+
+ return RT_EOK;
+}
+
+static rt_size_t i2c_bus_device_read(rt_device_t dev,
+ rt_off_t pos,
+ void *buffer,
+ rt_size_t count)
+{
+ rt_uint16_t addr;
+ rt_uint16_t flags;
+ struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
+
+ RT_ASSERT(bus != RT_NULL);
+ RT_ASSERT(buffer != RT_NULL);
+
+ i2c_dbg("I2C bus dev [%s] reading %u bytes.\n", dev->parent.name, count);
+
+ addr = pos & 0xffff;
+ flags = (pos >> 16) & 0xffff;
+
+ return rt_i2c_master_recv(bus, addr, flags, buffer, count);
+}
+
+static rt_size_t i2c_bus_device_write(rt_device_t dev,
+ rt_off_t pos,
+ const void *buffer,
+ rt_size_t count)
+{
+ rt_uint16_t addr;
+ rt_uint16_t flags;
+ struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
+
+ RT_ASSERT(bus != RT_NULL);
+ RT_ASSERT(buffer != RT_NULL);
+
+ i2c_dbg("I2C bus dev writing %u bytes.\n", dev->parent.name, count);
+
+ addr = pos & 0xffff;
+ flags = (pos >> 16) & 0xffff;
+
+ return rt_i2c_master_send(bus, addr, flags, buffer, count);
+}
+
+static rt_err_t i2c_bus_device_control(rt_device_t dev,
+ rt_uint8_t cmd,
+ void *args)
+{
+ rt_err_t ret;
+ struct rt_i2c_priv_data *priv_data;
+ struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
+
+ RT_ASSERT(bus != RT_NULL);
+
+ switch (cmd)
+ {
+ /* set 10-bit addr mode */
+ case RT_I2C_DEV_CTRL_10BIT:
+ bus->flags |= RT_I2C_ADDR_10BIT;
+ break;
+ case RT_I2C_DEV_CTRL_ADDR:
+ bus->addr = *(rt_uint16_t *)args;
+ break;
+ case RT_I2C_DEV_CTRL_TIMEOUT:
+ bus->timeout = *(rt_uint32_t *)args;
+ break;
+ case RT_I2C_DEV_CTRL_RW:
+ priv_data = (struct rt_i2c_priv_data *)args;
+ ret = rt_i2c_transfer(bus, priv_data->msgs, priv_data->number);
+ if (ret < 0)
+ {
+ return -RT_EIO;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return RT_EOK;
+}
+
+rt_err_t rt_i2c_bus_device_device_init(struct rt_i2c_bus_device *bus,
+ const char *name)
+{
+ struct rt_device *device;
+ RT_ASSERT(bus != RT_NULL);
+
+ device = &bus->parent;
+
+ device->user_data = bus;
+
+ /* set device type */
+ device->type = RT_Device_Class_I2CBUS;
+ /* initialize device interface */
+ device->init = i2c_bus_device_init;
+ device->open = RT_NULL;
+ device->close = RT_NULL;
+ device->read = i2c_bus_device_read;
+ device->write = i2c_bus_device_write;
+ device->control = i2c_bus_device_control;
+
+ /* register to device manager */
+ rt_device_register(device, name, RT_DEVICE_FLAG_RDWR);
+
+ return RT_EOK;
+}
generated by cgit v1.3.1 (git 2.54.0) at 2026-10-30 12:29:54 +0000