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Avoid divide by zero crash if touch screen not fitted or not wired up

This commit is contained in:
Bodmer 2017-12-27 14:57:01 +00:00
parent b536af5062
commit 5e98ce5294
1 changed files with 10 additions and 0 deletions
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10
TFT_eSPI.cpp
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@ -4249,6 +4249,11 @@ void TFT_eSPI::calibrateTouch(uint16_t *parameters, uint32_t color_fg, uint32_t
touchCalibration_x1 -= touchCalibration_x0;
touchCalibration_y1 -= touchCalibration_y0;
if(touchCalibration_x0 == 0) touchCalibration_x0 = 1;
if(touchCalibration_x1 == 0) touchCalibration_x1 = 1;
if(touchCalibration_y0 == 0) touchCalibration_y0 = 1;
if(touchCalibration_y1 == 0) touchCalibration_y1 = 1;
// export parameters, if pointer valid
if(parameters != NULL){
parameters[0] = touchCalibration_x0;
@ -4270,6 +4275,11 @@ void TFT_eSPI::setTouch(uint16_t *parameters){
touchCalibration_y0 = parameters[2];
touchCalibration_y1 = parameters[3];
if(touchCalibration_x0 == 0) touchCalibration_x0 = 1;
if(touchCalibration_x1 == 0) touchCalibration_x1 = 1;
if(touchCalibration_y0 == 0) touchCalibration_y0 = 1;
if(touchCalibration_y1 == 0) touchCalibration_y1 = 1;
touchCalibration_rotate = parameters[4] & 0x01;
touchCalibration_invert_x = parameters[4] & 0x02;
touchCalibration_invert_y = parameters[4] & 0x04;