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I think you'd better to find a professional to solve the problem.
There are some high voltage In CRT TV main board and CRT.
This is dangerous.
But usually E2PROM is a soc8 package chip to storage channel info or other data closed by CPU.
I have two application note about BLDC back EMF driver which contain BLDC principle,schematic and mathematical model,hope to help you!
https://ww1.microchip.com/downloads/en/AppNotes/00885a.pdf...
The best solution is used RTC chip.
If you only used PIC,you can create a soft timer based on TIMER 1 or other Timers,
then,you can Create some Variable to count time by add 1 in soft timer,
you must have a function to manage those Variable in main().
I Corrected a problem in your function “void DMA2_Init(void)”
"RCC_Configuration_DMA();"this function is not definition.
I think it should be changed to "RCC_Configuration();"
than,I defined CH_TOTAL_NUM_E is 4.
I downloaded your code to my STM32F407 DISCOVERY BOARD,
I connected PA0 PA2 to...
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