sequential (55) Left right shift line

https://wodewangzhishime.blogspot.com/2022/06/httpswodewangzhishime.html

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Ref:https://kamchihau.blogspot.com/2022/10/httpskamchihau_16.html.

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John: See the picture above. Not all the chips have the Left/Right shift line. Left/Right shift line is a field.

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For (int i = 0; i<100; i++)

{

Sum = Sum + i (Right shift) Receiving. 

}

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__

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For (int i = 100; i>0; i--)

{

Decrease = decrease - i (Left shift) Sending. 

}

Subject [I2C]

Object [Sum]

Interrupt_status []

Load_Shift_status [Shift]

Left_Right_Shift [ right ] <-- Right shift mean receiving. In the port of SPI, you're not supposed to set it.

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Me: The port of I2C is only one line. This one line is used for both receiving and sending. Therefore,  Left/Right Shift line is needed in this case.

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John : Other chips doesn't have Left/Right Shift line.

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Me: Right shift mean receiving in the port of I2C.  Left shift mean sending in the port of I2C.

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John : Spi port has 2 line. One is for receiving.  One is for sending.  Therefore,  you can't set the left/right shift in Spi port.

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Me: There's no left/right shift line in SPI port.