TouchDrvCHSC5816.cpp

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#include "../SensorBuildOpt.h"
#if !SENSORLIB_EXCLUDE_TOUCH_CHSC5816
 
#include "TouchDrvCHSC5816.hpp"
 
void TouchDrvCHSC5816::sleep()
{
    uint8_t CHSC5816_REG_SLEEP[] = {
        0x20, 0x00, 0x00, 0x00, // CHSC5816_REG_CMD_BUFF
        0xF8, 0x16, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xE9
    };
    writeBuff(CHSC5816_REG_SLEEP, arraySize(CHSC5816_REG_SLEEP));
}
 
const TouchPoints &TouchDrvCHSC5816::getTouchPoints()
{
    uint8_t buffer[POINT_BUFFER_SIZE] = {0};
 
    _touchPoints.clear(); // Clear cached touch points
 
    addrToBeBuf(REG_POINT_EVENT, buffer);
    if (writeThenRead(buffer, COMMAND_SIZE, buffer, POINT_BUFFER_SIZE) == 0) {
 
        // Get number of touch points
        uint8_t numPoints = buffer[1];
 
        if (numPoints > MAX_FINGER_NUM || numPoints == 0) {
            return _touchPoints;
        }
        const uint16_t x  = buffer[2] | ((buffer[5] & 0x0F) << 8);
        const uint16_t y  = buffer[3] | (((buffer[5] >> 4) & 0x0F) << 8);
        const uint8_t pressure = buffer[4];
        const uint8_t eventFlag = (buffer[6] & 0x0F);
        const uint8_t id = (buffer[6] >> 4) & 0x0F;
        _touchPoints.addPoint(x, y, pressure, id, eventFlag);
 
        // Swap XY or mirroring coordinates,if set
        updateXY(_touchPoints);
    }
    return _touchPoints;
}
 
const char *TouchDrvCHSC5816::getModelName()
{
    return "CHSC5816";
}
 
bool TouchDrvCHSC5816::initImpl(uint8_t)
{
    hal->delay(10);
 
    uint8_t buffer[16] = {0};
 
    addrToBeBuf(REG_BOOT_STATE, buffer);
    if (writeBuff(buffer, arraySize(buffer)) < 0) {
        SENSORLIB_LOG_E("writeBuff clean boot state failed!");
        return false;
    }
 
    hal->delay(10);
 
    bool success = false;
    int retry = 5;
    do {
        addrToBeBuf(REG_BOOT_STATE, buffer);
        if (writeThenRead(buffer, 4, buffer, 4) < 0) {
            return false;
        }
 
        hal->delay(20);
 
        // Check if the signature matches
        // When device is startup , reg will report 0x43 0x48 0x53 0x43
        if (buffer[0] == 0x43 && buffer[1] == 0x48 && buffer[2] == 0x53 && buffer[3] == 0x43) {
            SENSORLIB_LOG_D("Signature matched!");
            success = true;
            break;
 
        }
    } while (retry--);
 
    if (success) {
        _maxTouchPoints = 1;
        _chipID = 0x5816;   // Fixed chip ID
        return true;
    }
 
    return false;
}
 
#endif