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fix(core): re-introduce touch event filtering

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This commit is contained in:
tychovrahe 2022-10-12 13:44:37 +02:00 committed by matejcik
parent f956966fda
commit 86f2dacc6e
1 changed files with 8 additions and 1 deletions
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9
core/embed/trezorhal/touch.c
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@ -287,7 +287,8 @@ uint32_t check_timeout(uint32_t prev, uint32_t timeout) {
}
uint32_t touch_read(void) {
static uint8_t touch_data[TOUCH_PACKET_SIZE];
static uint8_t touch_data[TOUCH_PACKET_SIZE],
previous_touch_data[TOUCH_PACKET_SIZE];
static uint32_t xy;
static uint32_t last_check_time = 0;
static uint32_t last_event_time = 0;
@ -333,6 +334,12 @@ uint32_t touch_read(void) {
last_event_time = hal_ticks_ms();
if (0 == memcmp(previous_touch_data, touch_data, TOUCH_PACKET_SIZE)) {
return 0; // same data, filter it out
} else {
memcpy(previous_touch_data, touch_data, TOUCH_PACKET_SIZE);
}
const uint32_t number_of_touch_points =
touch_data[2] & 0x0F; // valid values are 0, 1, 2 (invalid 0xF before
// first touch) (tested with FT6206)