Revision 119ec0d2 source/AT42QT1050/v1/alld_AT42QT1050_v1.c
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/******************************************************************************/ |
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/* LOCAL DEFINITIONS */ |
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/******************************************************************************/ |
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#define AT42QT1050_LLD_WATCHDOGTIME_MAX 125000 |
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#define AT42QT1050_LLD_INITIALIZATION_TIME_MAX 30000 |
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/******************************************************************************/ |
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/* EXPORTED VARIABLES */ |
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apalDbgAssert(key < AT42QT1050_LLD_NUM_KEYS); |
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apalDbgAssert(signal != NULL); |
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const uint8_t txbuf = AT42QT1050_LLD_REG_KEYSIGNAL_0 + (2*key) + ((key > 1) ? 1 : 0);
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const uint8_t txbuf = AT42QT1050_LLD_REG_KEYSIGNAL_0 + (2*key) + ((key > 1) ? 2 : 0);
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uint8_t rxbuf[2]; |
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const apalExitStatus_t status = apalI2CMasterTransmit(at42qt1050d->i2cd, at42qt1050d->addr, &txbuf, 1, rxbuf, 2, timeout); |
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*signal = (rxbuf[0] << 8) | rxbuf[1]; |
| ... | ... | |
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apalDbgAssert(key < AT42QT1050_LLD_NUM_KEYS); |
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apalDbgAssert(refdata != NULL); |
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const uint8_t txbuf = AT42QT1050_LLD_REG_REFERENCEDATA_0 + (2*key) + ((key > 1) ? 1 : 0);
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const uint8_t txbuf = AT42QT1050_LLD_REG_REFERENCEDATA_0 + (2*key) + ((key > 1) ? 2 : 0);
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uint8_t rxbuf[2]; |
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const apalExitStatus_t status = apalI2CMasterTransmit(at42qt1050d->i2cd, at42qt1050d->addr, &txbuf, 1, rxbuf, 2, timeout); |
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*refdata = (rxbuf[0] << 8) | rxbuf[1]; |
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} |
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/** |
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* @brief Soft Reset of the device |
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* |
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* @param[in] at42qt1050d The AT42QT1050 driver to use. |
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* @param[in] timeout Timeout for the function to return (in microseconds). |
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* @param[in] wait4wakeup Wait for device wakeup (timeout must be > 155 ms) |
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* |
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* @return Indicator whether the function call was successful or a timeout occurred. |
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*/ |
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inline apalExitStatus_t at42qt1050_lld_reset_safe(const AT42QT1050Driver* at42qt1050d, const bool wait4wakeup, const apalTime_t timeout) {
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if(wait4wakeup) |
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apalDbgAssert(timeout >= AT42QT1050_LLD_WATCHDOGTIME_MAX+AT42QT1050_LLD_INITIALIZATION_TIME_MAX); |
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return at42qt1050_lld_reset(at42qt1050d, timeout-(AT42QT1050_LLD_WATCHDOGTIME_MAX+AT42QT1050_LLD_INITIALIZATION_TIME_MAX), wait4wakeup); |
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} |
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/** |
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* @brief Soft Reset of the device |
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* |
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* @param[in] at42qt1050d The AT42QT1050 driver to use. |
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* @param[in] timeout Timeout for the i2c call (in microseconds). |
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* @param[in] wait4wakeup Wait for device wakeup (155 ms) |
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* |
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* @return Indicator whether the function call was successful or a timeout occurred. |
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*/ |
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inline apalExitStatus_t at42qt1050_lld_reset(const AT42QT1050Driver* at42qt1050d, const apalTime_t timeout, const bool wait4wakeup) {
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apalDbgAssert(at42qt1050d != NULL && at42qt1050d->i2cd != NULL); |
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const apalExitStatus_t status = at42qt1050_lld_write_reg( |
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at42qt1050d, AT42QT1050_LLD_RESETCALIBRATE_RESET, AT42QT1050_LLD_RESETCALIBRATE_RESET, timeout); |
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if(wait4wakeup) |
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usleep(AT42QT1050_LLD_WATCHDOGTIME_MAX+AT42QT1050_LLD_INITIALIZATION_TIME_MAX); // watchdog timer+initialization -> datasheet |
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return status; |
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} |
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/** |
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* @brief Convert a 4 bit pulse value to the representing number of samples. |
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* @details Calculation: <#samples> = 2^(<pulse value>) |
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* |
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