/**
* Config-to-Object function.
* Creates a LedHardware model from a prefs node
* @note you shouldn't call this function directly.
* It's used by nft_prefs_obj_from_node() etc.
*/
static NftResult _prefs_to_hardware(LedPrefs * p, void **newObj,
NftPrefsNode * n, void *userptr)
{
if(!p || !newObj || !n)
NFT_LOG_NULL(NFT_FAILURE);
/** initial result */
NftResult r = NFT_FAILURE;
char *name = NULL;
char *id = NULL;
char *plugin_name = NULL;
LedHardware *h = NULL;
/* get hardware name */
if(!
(name = nft_prefs_node_prop_string_get(n, LED_HARDWARE_PROP_NAME)))
{
NFT_LOG(L_ERROR, "\"hardware\" has no name");
goto _pth_end;
}
/* get plugin-name */
if(!
(plugin_name =
nft_prefs_node_prop_string_get(n, LED_HARDWARE_PROP_PLUGIN)))
{
NFT_LOG(L_ERROR, "\"hardware\" has no \"plugin\" type");
goto _pth_end;
}
/* get plugin-id */
if(!(id = nft_prefs_node_prop_string_get(n, LED_HARDWARE_PROP_ID)))
{
NFT_LOG(L_ERROR, "\"hardware\" has no \"id\" type");
goto _pth_end;
}
/* get stride */
LedCount stride;
if(!
(nft_prefs_node_prop_int_get
(n, LED_HARDWARE_PROP_STRIDE, (int *) &stride)))
{
NFT_LOG(L_WARNING,
"\"hardware\" has no \"stride\". Using 0 as default.");
stride = 0;
}
/* create new hardware object */
if(!(h = led_hardware_new(name, plugin_name)))
{
NFT_LOG(L_ERROR,
"Failed to initialize \"%s\" from \"%s\" plugin.",
name, plugin_name);
goto _pth_end;
}
/* set stride */
if(!(led_hardware_set_stride(h, stride)))
{
NFT_LOG(L_ERROR,
"Failed to set stride (%d) of hardware \"%s\"",
stride, name);
goto _pth_end;
}
/* set id */
if(!(led_hardware_set_id(h, id)))
{
NFT_LOG(L_ERROR, "Failed to set ID \"%s\" of hardware \"%s\"",
id, name);
goto _pth_end;
}
/** @todo handle custom properties */
/* process child nodes */
LedPrefsNode *child;
for(child = nft_prefs_node_get_first_child(n);
child; child = nft_prefs_node_get_next(child))
{
/* is child a tile node? */
if(led_prefs_is_tile_node(child))
{
if(!led_hardware_append_tile
(h, led_prefs_tile_from_node(p, child)))
{
NFT_LOG(L_ERROR,
"Failed to add \"tile\" to \"%s\". Aborting.",
name);
goto _pth_end;
}
continue;
}
/* is child a chain node? */
else if(led_prefs_is_chain_node(child))
{
LedChain *c;
if(!(c = led_prefs_chain_from_node(p, child)))
{
NFT_LOG(L_ERROR,
"Failed to create \"chain\" node of hardware %s",
name);
goto _pth_end;
}
if(!led_hardware_init
(h, id, led_chain_get_ledcount(c),
led_pixel_format_to_string(led_chain_get_format
(c))))
{
NFT_LOG(L_WARNING,
"Failed to initialize hardware \"%s\"",
name);
}
led_chain_destroy(c);
}
/* is child a plugin-property node? */
else if(strcmp
(nft_prefs_node_get_name(child),
LED_HARDWARE_PROPERTY_NAME) == 0)
{
char *name = NULL;
char *type = NULL;
char *value = NULL;
/* get name of property */
if(!
(name =
nft_prefs_node_prop_string_get(child,
LED_HARDWARE_PROPERTY_PROP_NAME)))
{
NFT_LOG(L_ERROR,
"\"%s\" has no \"%s\" property",
LED_HARDWARE_PROPERTY_NAME,
LED_HARDWARE_PROPERTY_PROP_NAME);
goto _pthp_end;
}
/* type of property */
if(!
(type =
nft_prefs_node_prop_string_get(child,
LED_HARDWARE_PROPERTY_PROP_TYPE)))
{
NFT_LOG(L_ERROR,
"\"%s\" has no \"%s\" property",
LED_HARDWARE_PROPERTY_NAME,
LED_HARDWARE_PROPERTY_PROP_TYPE);
goto _pthp_end;
}
/* property value */
if(!
(value =
nft_prefs_node_prop_string_get(child,
LED_HARDWARE_PROPERTY_PROP_VALUE)))
{
NFT_LOG(L_ERROR,
"\"%s\" has no \"%s\" property",
LED_HARDWARE_PROPERTY_NAME,
LED_HARDWARE_PROPERTY_PROP_VALUE);
goto _pthp_end;
}
/* decide about type */
switch (led_hardware_plugin_prop_type_from_string
(type))
{
/* int */
case LED_HW_CUSTOM_PROP_INT:
{
int integer;
if(sscanf(value, "%32d", &integer) != 1)
{
NFT_LOG(L_ERROR,
"Failed to parse integer from \"%s\" property (\"%s\")",
LED_HARDWARE_PROPERTY_PROP_VALUE,
value);
goto _pthp_end;
}
if(!led_hardware_plugin_prop_set_int
(h, name, integer))
{
NFT_LOG(L_ERROR,
"Failed to set \"%s\" = %d)",
name, integer);
goto _pthp_end;
}
break;
}
/* float */
case LED_HW_CUSTOM_PROP_FLOAT:
{
float f;
if(sscanf(value, "%64f", &f) != 1)
{
NFT_LOG(L_ERROR,
"Failed to parse float from \"%s\" property (\"%s\")",
LED_HARDWARE_PROPERTY_PROP_VALUE,
value);
goto _pthp_end;
}
if(!led_hardware_plugin_prop_set_float
(h, name, f))
{
NFT_LOG(L_ERROR,
"Failed to set \"%s\" = %f)",
name, f);
goto _pthp_end;
}
break;
}
/* string */
case LED_HW_CUSTOM_PROP_STRING:
{
if(!led_hardware_plugin_prop_set_string(h, name, value))
{
NFT_LOG(L_ERROR,
"Failed to set \"%s\" = \"%s\")",
name, value);
goto _pthp_end;
}
break;
}
/* huh? */
default:
{
NFT_LOG(L_ERROR,
"Invalid plugin-property type: \"%s\"",
type);
break;
}
}
_pthp_end:
nft_prefs_free(name);
nft_prefs_free(type);
nft_prefs_free(value);
continue;
}
else
{
NFT_LOG(L_WARNING,
"Attempt to add \"%s\" node to hardware. Not allowed. (Ignoring node)",
nft_prefs_node_get_name(child));
continue;
}
}
/* everything pico bello */
r = NFT_SUCCESS;
_pth_end:
/* free strings */
nft_prefs_free(id);
nft_prefs_free(plugin_name);
nft_prefs_free(name);
/* newly created hardware object */
*newObj = h;
return r;
}
int main(int argc, char *argv[])
{
nft_log_level_set(L_DEBUG);
/* register new dummy hardware called "nlo01" */
LedHardware *h;
if(!(h = led_hardware_new("nlo01", "dummy")))
{
NFT_LOG(L_ERROR, "Hardware creation FAILED");
return -1;
}
/* initialize any hardware that can be found (id="*"), define 12
* connected LEDs (4 BGR pixels). Greyscale data should be provided in
* unsigned 8-bit format */
if(!led_hardware_init(h, "*", 12, "BGR u8"))
{
NFT_LOG(L_ERROR, "failed to initialize hardware");
return -1;
}
/**********************************************************************
* niftyled basically provides 2 ways to send data to LED hardware:
*
* 1. set "raw" greyscale value of a LED in a chain connected to a
* correctly initialized LED hardware
*
* 1.1 use the API to set each greyscale value
*
* 1.2 directly write to the RAW buffer
*
*
* 2. send a complete pixelframe and have niftyled translate that to
* mapped LEDs connected to one or more LED hardware devices
* according to the current setup configuration (where each LED
* has been assigned a X/Y coordinate and a "Component" that refers
* to a component of a pixel at this position in the pixelframe)
*/
/****** METHOD 1.1 *******/
/* get chain of this hardware */
LedChain *c = led_hardware_get_chain(h);
/* set all LEDs to half brightness */
LedCount l;
for(l = 0; l < led_chain_get_ledcount(c); l++)
{
led_chain_set_greyscale(c, l, 128);
}
/* send data to hardware */
led_hardware_send(h);
/* show previously sent hardware (latch to LEDs) */
led_hardware_show(h);
/****** METHOD 1.2 *******/
/* ...or access raw pixelbuffer */
uint8_t *pixels = led_chain_get_buffer(c);
/* walk all pixels to turn on all LEDs */
int i;
for(i = 0; i < 16; i++)
pixels[i] = 0xff;
/* send data to hardware */
led_hardware_send(h);
/* show previously sent hardware (latch to LEDs) */
led_hardware_show(h);
/****** METHOD 2 - s. ledcat sources *******/
/* deinitialize hardware */
led_hardware_deinit(h);
return 0;
}