Other Parts Discussed in Thread: TLC69661
Tool/software:
Currently, TLC69661 is used as the LED driver. At present, only one TLC69661 is used, and the cascading function of more TLC69661s is not used.You can refer to the schematic diagram.
1.SCH
The following commands have been sent according to the timing sequence. The command sending should be successful because the LED was lit for 1 minute. The input frequency of CLK is 482Hz. At this time, the RGB light can be lit, but due to the low frequency, the brightness of the RGB light cannot be adjusted and the light flickers. Later, the CLK frequency is adjusted to 40KHz. It is found that the RGB light cannot be lit for a long time. The time is about 1 minute. After 1 minute, the RGB light goes out and cannot be lit again.
Re-powering on and off also cannot light it up. Everything else remains unchanged. When the CLK is adjusted to 482Hz again, it also cannot be lit again.
At present, the difficult points of the problem lie in the correct process and control timing sequence of RGB light control. Or have we overlooked any important points?
2.Four CMD flowchart
3、Send Chip ID
4、Send FC register init
4、Send synchronization CMD
5、Send brightness data.
6、Logic analyzer, clock and data waveforms for your reference(The synchronization command was not captured.)：
