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Fix touch screen handler

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The touch screen handler was broken for the ESP8266 only. The library
uses SPI write only configuration for ESP8266 so the SPI buffer can be
recycled and it was left in write only mode. The library now switches
back to read & write mode at the end of a transaction.
This commit is contained in:
Bodmer
2019-02-14 00:32:16 +00:00
parent d6e07078f7
commit 26d7e4038a
6 changed files with 33 additions and 41 deletions
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Extensions/Touch.cpp
+2 -12
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@@ -16,11 +16,8 @@
***************************************************************************************/
uint8_t TFT_eSPI::getTouchRaw(uint16_t *x, uint16_t *y){
uint16_t tmp;
CS_H;
spi_begin_touch();
T_CS_L;
// Start YP sample request for x position, read 4 times and keep last sample
spi.transfer(0xd0); // Start new YP conversion
@@ -51,8 +48,6 @@ uint8_t TFT_eSPI::getTouchRaw(uint16_t *x, uint16_t *y){
*y = tmp;
T_CS_H;
spi_end_touch();
return true;
@@ -63,20 +58,15 @@ uint8_t TFT_eSPI::getTouchRaw(uint16_t *x, uint16_t *y){
** Description: read raw pressure on touchpad and return Z value.
***************************************************************************************/
uint16_t TFT_eSPI::getTouchRawZ(void){
CS_H;
spi_begin_touch();
T_CS_L;
// Calculate Z
// Z sample request
int16_t tz = 0xFFF;
spi.transfer(0xb0); // Start new Z1 conversion
tz += spi.transfer16(0xc0) >> 3; // Read Z1 and start Z2 conversion
tz -= spi.transfer16(0x00) >> 3; // Read Z2
T_CS_H;
spi_end_touch();
return (uint16_t)tz;
@@ -86,7 +76,7 @@ uint16_t TFT_eSPI::getTouchRawZ(void){
** Function name: validTouch
** Description: read validated position. Return false if not pressed.
***************************************************************************************/
#define _RAWERR 10 // Deadband error allowed in successive position samples
#define _RAWERR 20 // Deadband error allowed in successive position samples
uint8_t TFT_eSPI::validTouch(uint16_t *x, uint16_t *y, uint16_t threshold){
uint16_t x_tmp, y_tmp, x_tmp2, y_tmp2;