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#include <FreeRTOS.h>
#include <task.h>
#include <nrfx_log.h>
#include <legacy/nrf_drv_gpiote.h>
#include "Cst816s.h"
using namespace Pinetime::Drivers;
/* References :
* This implementation is based on this article : https://medium.com/@ly.lee/building-a-rust-driver-for-pinetimes-touch-controller-cbc1a5d5d3e9
* Touch panel datasheet (weird chinese translation) : https://wiki.pine64.org/images/5/51/CST816S%E6%95%B0%E6%8D%AE%E6%89%8B%E5%86%8CV1.1.en.pdf
*
* TODO : we need a complete datasheet and protocol reference!
* */
Cst816S::Cst816S(TwiMaster &twiMaster, uint8_t twiAddress) : twiMaster{twiMaster}, twiAddress{twiAddress} {
}
void Cst816S::Init() {
nrf_gpio_cfg_output(pinReset);
nrf_gpio_pin_set(pinReset);
vTaskDelay(50);
nrf_gpio_pin_clear(pinReset);
vTaskDelay(5);
nrf_gpio_pin_set(pinReset);
vTaskDelay(50);
// Wake the touchpanel up
uint8_t dummy;
twiMaster.Read(twiAddress, 0x15, &dummy, 1);
vTaskDelay(5);
twiMaster.Read(twiAddress, 0xa7, &dummy, 1);
}
Cst816S::TouchInfos Cst816S::GetTouchInfo() {
Cst816S::TouchInfos info;
twiMaster.Read(twiAddress, 0, touchData, 63);
auto nbTouchPoints = touchData[2] & 0x0f;
// uint8_t i = 0;
// NRF_LOG_INFO("#########################")
for(int i = 0; i < 1; i++) {
uint8_t pointId = (touchData[touchIdIndex + (touchStep * i)]) >> 4;
if(nbTouchPoints == 0 && pointId == lastTouchId) return info;
// We fetch only the first touch point (the controller seems to handle only one anyway...)
info.isTouch = true;
auto xHigh = touchData[touchXHighIndex + (touchStep * i)] & 0x0f;
auto xLow = touchData[touchXLowIndex + (touchStep * i)];
uint16_t x = (xHigh << 8) | xLow;
auto yHigh = touchData[touchYHighIndex + (touchStep * i)] & 0x0f;
auto yLow = touchData[touchYLowIndex + (touchStep * i)];
uint16_t y = (yHigh << 8) | yLow;
auto action = touchData[touchEventIndex + (touchStep * i)] >> 6; /* 0 = Down, 1 = Up, 2 = contact*/
//auto finger = touchData[touchIdIndex + (touchStep * i)] >> 4;
//auto pressure = touchData[touchXYIndex + (touchStep * i)];
//auto area = touchData[touchMiscIndex + (touchStep * i)] >> 4;
info.x = x;
info.y = y;
info.action = action;
info.gesture = static_cast<Gestures>(touchData[gestureIndex]);
// NRF_LOG_INFO("---------------")
// NRF_LOG_INFO("ID : %d", pointId);
// NRF_LOG_INFO("NB : %d", nbTouchPoints);
// NRF_LOG_INFO("X/Y :%d / %d", info.x, info.y);
// NRF_LOG_INFO("Action : %d", action);
// NRF_LOG_INFO("Finger : %d", finger);
// NRF_LOG_INFO("Pressure : %d", pressure);
// NRF_LOG_INFO("area : %d", area);
// NRF_LOG_INFO("Touch : %s", info.isTouch?"Yes" : "No");
// switch(info.gesture) {// gesture
// case Gestures::None: NRF_LOG_INFO("Gesture : None"); break;
// case Gestures::SlideDown: NRF_LOG_INFO("Gesture : Slide Down"); break;
// case Gestures::SlideUp: NRF_LOG_INFO("Gesture : Slide Up"); break;
// case Gestures::SlideLeft: NRF_LOG_INFO("Gesture : Slide Left"); break;
// case Gestures::SlideRight: NRF_LOG_INFO("Gesture : Slide Right"); break;
// case Gestures::SingleTap: NRF_LOG_INFO("Gesture : Single click"); break;
// case Gestures::DoubleTap: NRF_LOG_INFO("Gesture : Double click"); break;
// case Gestures::LongPress: NRF_LOG_INFO("Gesture : Long press"); break;
// default : NRF_LOG_INFO("Unknown"); break;
// }
}
return info;
}
void Cst816S::Sleep() {
nrf_gpio_pin_clear(pinReset);
vTaskDelay(5);
nrf_gpio_pin_set(pinReset);
vTaskDelay(50);
static constexpr uint8_t sleepValue = 0x03;
twiMaster.Write(twiAddress, 0xA5, &sleepValue, 1);
NRF_LOG_INFO("[TOUCHPANEL] Sleep");
}
void Cst816S::Wakeup() {
Init();
NRF_LOG_INFO("[TOUCHPANEL] Wakeup");
}
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