/*** bool WS2812::begin(uint32_t cDevices, uint8_t * pPatternBuffer, uint32_t cbPatternBuffer, bool fInvert)
*
* Parameters:
* cDevices: The number of devices in the WS2812 string / chain
*
* pPatternBuffer: A pointer to the pattern buffer for the DMA to use
* The application allocates this and should be
* CBWS2812PATBUF(__cDevices) bytes long.
*
* cbPatternBuffer: This should be CBWS2812PATBUF(__cDevices) or larger
*
* fInvert: Because the WS2812 does not have a VinH <= 3.3 when Vcc >= 4.7v
* External hardware may be needed to level shift the 3.3v SDO output
* to a higher Data in signal to the WS2812. This level shifter may
* be a simple transistor tied to 5v - 7v. The transistor will invert
* the SDO output signal and to maintain the correct signal polarity
* to the WS2812 you would need to invert the signal coming out of SDO.
* If fInvert is true, the SDO output signal will be inverted from what
* the WS2812 would normally take. By default, the is "false".
*
* Return Values:
* True if the WS2812 library was successfully initialized
* False if it was not. Probably because the pattern buffer was not the correct size
* or because there were no open slots in the CoreTimer Service Routines.
*
* Description:
*
* Initializes the WS2812 library and starts streaming a refresh cycle out on SDO
*
* ------------------------------------------------------------ */
bool WS2812::begin(uint32_t cDevices, uint8_t * pPatternBuffer, uint32_t cbPatternBuffer, bool fInvert)
{
if(_fInit)
{
return(true);
}
if(cDevices == 0 || pPatternBuffer == NULL || cbPatternBuffer < CBWS2812PATBUF(cDevices))
{
return(false);
}
init();
_cDevices = cDevices;
_pPatternBuffer = pPatternBuffer;
_cbPatternBuffer = cbPatternBuffer;
_fInit = InitWS2812(pPatternBuffer, cbPatternBuffer, fInvert);
_fInvert = fInvert;
if(!_fInit)
{
end();
}
return(_fInit);
}
int LinxChipkit::WS2812Open(unsigned short numLeds, unsigned char dataChan)
{
#ifdef _BOARD_WF32_ | _BOARD_MEGA_
m_numPixels = numLeds;
m_WS2812Buffer = (WS2812::GRB*)malloc(numLeds * sizeof(WS2812::GRB));
m_rgbPatternBuffer = (uint8_t*)malloc(CBWS2812PATBUF(numLeds));
//Check If Memory Was Allocated Successfully
if(m_WS2812Buffer == 0 || m_rgbPatternBuffer == 0)
{
return 0x81;
}
else
{
m_ws2812.begin(numLeds, m_rgbPatternBuffer, CBWS2812PATBUF(numLeds), false);
}
return L_OK;
#else
return L_FUNCTION_NOT_SUPPORTED;
#endif
}