When the timer works in 16-bit counting mode, there are two parameters TH and TL.
Both parameters are 8-bit (0-255) and cannot directly accept 16-bit (0-65535) data.
In order to assign the high 8 bits to TH, the method of dividing by 256 is used, which is equivalent to >> 8 (2 to the 8th power = 256), which is equivalent to moving the high 8 bits to the low 8 bits. The
remainder is calculated to assign the low 8 bits to TL. When it cannot be divided by 256, the remainder range is only within 0-255. So it can be directly assigned to TL.
Therefore,
TH0=(65536-50000)/256;
TL0=(65536-50000)%6;
is equivalent to
TH0=(65536-50000)>>8;
TL0=(65536-50000)&0x00ff;.
During calculation, the microcontroller is more efficient in logical operations than in arithmetic operations.
Keywords：MCU
Reference address：Why do we need to calculate the modulus and remainder of 256 when the microcontroller interrupts and installs the initial value?
Both parameters are 8-bit (0-255) and cannot directly accept 16-bit (0-65535) data.
In order to assign the high 8 bits to TH, the method of dividing by 256 is used, which is equivalent to >> 8 (2 to the 8th power = 256), which is equivalent to moving the high 8 bits to the low 8 bits. The
remainder is calculated to assign the low 8 bits to TL. When it cannot be divided by 256, the remainder range is only within 0-255. So it can be directly assigned to TL.
Therefore,
TH0=(65536-50000)/256;
TL0=(65536-50000)%6;
is equivalent to
TH0=(65536-50000)>>8;
TL0=(65536-50000)&0x00ff;.
During calculation, the microcontroller is more efficient in logical operations than in arithmetic operations.
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