1, to achieve SPI drive TSC2046, read X, Y touch coordinates 2, touch coordinates and LCD coordinates of the corresponding relationship can be matrix translation, rotation, zoom to show that the three XL XT* A+ XT* B+ C YL YT* D+ YT* E+ F The parameters A, B, C, D, E, F are calculated using the five-point correction algorithm Because the parameters are mostly decimal not easy to store, so multiplied by a parameter stored as an integer. 3, each time you read the touch press the coordinates, read TSC2046 is the touch coordinates, And the need for LCD coordinates, so the touch coordinates and the above parameters into the above equation can be obtained

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