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examples/lvgldemo: Select default demo

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The LVGL Example App `lvgldemo` currently requires 1 argument: the name of the demo to show.

```bash
lvgldemo widgets
```

In this PR, we propose to make the argument optional if there is only one demo configured. This will enable PINE64 PinePhone to boot straight into `lvgldemo` and auto-start the LVGL App, without entering any `nsh` commands.

### Modified Files

`examples/lvgldemo/lvgldemo.c`: If no arguments are specified and only 1 demo exists, select the demo
This commit is contained in:
Lee Lup Yuen 2023-01-16 08:29:43 +08:00 committed by Xiang Xiao
parent b1e6583246
commit 757fc307c3
1 changed files with 15 additions and 2 deletions
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17
examples/lvgldemo/lvgldemo.c
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@ -171,14 +171,27 @@ static demo_create_func_t find_demo_create_func(FAR const char *name)
int main(int argc, FAR char *argv[])
{
demo_create_func_t demo_create_func;
FAR const char *demo = NULL;
const int func_key_pair_len = sizeof(func_key_pair) /
sizeof(func_key_pair[0]);
if (argc != 2)
/* If no arguments are specified and only 1 demo exists, select the demo */
if (argc == 1 && func_key_pair_len == 2) /* 2 because of NULL sentinel */
{
demo = func_key_pair[0].name;
}
else if (argc != 2)
{
show_usage();
return EXIT_FAILURE;
}
else
{
demo = argv[1];
}
demo_create_func = find_demo_create_func(argv[1]);
demo_create_func = find_demo_create_func(demo);
if (demo_create_func == NULL)
{