20 哪里有制造类似于rtthread源码bso目录下驱动的制作教程

发布于 2021-05-13 16:13:52 浏览：1305 订阅该版

yangjie 认证专家 2021-05-13

hello

一般就是：定义设备-实现ops-注册。

以[bsp/stm32/libraries/HAL_Drivers/drv_soft_i2c.c](https://github.com/RT-Thread/rt-thread/blob/master/bsp/stm32/libraries/HAL_Drivers/drv_soft_i2c.c)为例。

1、设备：
static struct stm32_i2c i2c_obj[sizeof(soft_i2c_config) / sizeof(soft_i2c_config[0])];

2、实现ops：
```
static const struct rt_i2c_bit_ops stm32_bit_ops_default =
{
    .data     = RT_NULL,
    .set_sda  = stm32_set_sda,
    .set_scl  = stm32_set_scl,
    .get_sda  = stm32_get_sda,
    .get_scl  = stm32_get_scl,
    .udelay   = stm32_udelay,
    .delay_us = 1,
    .timeout  = 100
};
```

3、初始化（注册）
```

/* I2C initialization function */
int rt_hw_i2c_init(void)
{
    rt_size_t obj_num = sizeof(i2c_obj) / sizeof(struct stm32_i2c);
    rt_err_t result;

for (int i = 0; i < obj_num; i++)
    {
        i2c_obj[i].ops = stm32_bit_ops_default;
        i2c_obj[i].ops.data = (void*)&soft_i2c_config[i];
        i2c_obj[i].i2c2_bus.priv = &i2c_obj[i].ops;
        stm32_i2c_gpio_init(&i2c_obj[i]);
        result = rt_i2c_bit_add_bus(&i2c_obj[i].i2c2_bus, soft_i2c_config[i].bus_name);
        RT_ASSERT(result == RT_EOK);
        stm32_i2c_bus_unlock(&soft_i2c_config[i]);

LOG_D("software simulation %s init done, pin scl: %d, pin sda %d",
        soft_i2c_config[i].bus_name,
        soft_i2c_config[i].scl,
        soft_i2c_config[i].sda);
    }

return RT_EOK;
}
INIT_BOARD_EXPORT(rt_hw_i2c_init);
```

以[bsp/stm32/libraries/HAL_Drivers/drv_dac.](https://github.com/RT-Thread/rt-thread/blob/master/bsp/stm32/libraries/HAL_Drivers/drv_dac.c)为例：

1、设备：
```
struct stm32_dac
{
    DAC_HandleTypeDef DAC_Handler;
    struct rt_dac_device stm32_dac_device;
};

static struct stm32_dac stm32_dac_obj[sizeof(dac_config) / sizeof(dac_config[0])];
```

2、实现ops
```
static const struct rt_dac_ops stm_dac_ops =
{
    .disabled = stm32_dac_disabled,
    .enabled  = stm32_dac_enabled,
    .convert  = stm32_set_dac_value,
};
```

3、初始化（注册）
```

static int stm32_dac_init(void)
{

//xxxx

if (rt_hw_dac_register(&stm32_dac_obj[i].stm32_dac_device, name_buf, &stm_dac_ops, &stm32_dac_obj[i].DAC_Handler) == RT_EOK)
            {
                LOG_D("%s init success", name_buf);
            }

return result;
}
INIT_DEVICE_EXPORT(stm32_dac_init);
```