012c246e40
More memory for freertos heap and timer stack Fix warning in watchface Fix number of bytes read by cst816 Debug app to show freertos tasks Increased the number of bytes of the twi write buffer
94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
#include "Cst816s.h"
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#include <FreeRTOS.h>
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#include <legacy/nrf_drv_gpiote.h>
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#include <nrfx_log.h>
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#include <task.h>
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using namespace Pinetime::Drivers;
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/* References :
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* This implementation is based on this article : https://medium.com/@ly.lee/building-a-rust-driver-for-pinetimes-touch-controller-cbc1a5d5d3e9
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* 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
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*
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* TODO : we need a complete datasheet and protocol reference!
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* */
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Cst816S::Cst816S(TwiMaster &twiMaster, uint8_t twiAddress) : twiMaster{twiMaster}, twiAddress{twiAddress} {
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}
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void Cst816S::Init() {
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nrf_gpio_cfg_output(pinReset);
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nrf_gpio_pin_set(pinReset);
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vTaskDelay(50);
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nrf_gpio_pin_clear(pinReset);
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vTaskDelay(5);
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nrf_gpio_pin_set(pinReset);
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vTaskDelay(50);
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// Wake the touchpanel up
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uint8_t dummy;
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twiMaster.Read(twiAddress, 0x15, &dummy, 1);
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vTaskDelay(5);
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twiMaster.Read(twiAddress, 0xa7, &dummy, 1);
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vTaskDelay(5);
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/*
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[2] EnConLR - Continuous operation can slide around
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[1] EnConUD - Slide up and down to enable continuous operation
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[0] EnDClick - Enable Double-click action
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*/
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static constexpr uint8_t motionMask = 0b00000101;
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twiMaster.Write(twiAddress, 0xEC, &motionMask, 1);
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}
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Cst816S::TouchInfos Cst816S::GetTouchInfo() {
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Cst816S::TouchInfos info;
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auto ret = twiMaster.Read(twiAddress, 0, touchData, sizeof(touchData));
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if(ret != TwiMaster::ErrorCodes::NoError) return {};
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auto nbTouchPoints = touchData[2] & 0x0f;
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uint8_t i = 0;
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uint8_t pointId = (touchData[touchIdIndex + (touchStep * i)]) >> 4;
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if(nbTouchPoints == 0 && pointId == lastTouchId) return info;
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info.isTouch = true;
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auto xHigh = touchData[touchXHighIndex + (touchStep * i)] & 0x0f;
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auto xLow = touchData[touchXLowIndex + (touchStep * i)];
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uint16_t x = (xHigh << 8) | xLow;
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auto yHigh = touchData[touchYHighIndex + (touchStep * i)] & 0x0f;
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auto yLow = touchData[touchYLowIndex + (touchStep * i)];
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uint16_t y = (yHigh << 8) | yLow;
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auto action = touchData[touchEventIndex + (touchStep * i)] >> 6; /* 0 = Down, 1 = Up, 2 = contact*/
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info.x = x;
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info.y = y;
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info.action = action;
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info.gesture = static_cast<Gestures>(touchData[gestureIndex]);
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return info;
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}
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void Cst816S::Sleep() {
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nrf_gpio_pin_clear(pinReset);
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vTaskDelay(5);
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nrf_gpio_pin_set(pinReset);
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vTaskDelay(50);
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static constexpr uint8_t sleepValue = 0x03;
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twiMaster.Write(twiAddress, 0xA5, &sleepValue, 1);
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NRF_LOG_INFO("[TOUCHPANEL] Sleep");
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}
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void Cst816S::Wakeup() {
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Init();
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NRF_LOG_INFO("[TOUCHPANEL] Wakeup");
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} |