Function dac

components/drivers/misc/dac.c:149–231

#ifdef RT_USING_FINSH

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_disable(dac_device, atoi(argv[2]));