1 /**************************************************************************//**
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4 * @brief M2351 series DAC driver source file
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7 * Copyright (C) 2017 Nuvoton Technology Corp. All rights reserved.
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8 *****************************************************************************/
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11 /** @addtogroup Standard_Driver Standard Driver
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15 /** @addtogroup DAC_Driver DAC Driver
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19 /** @addtogroup DAC_EXPORTED_FUNCTIONS DAC Exported Functions
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24 * @brief This function make DAC module be ready to convert.
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25 * @param[in] dac The pointer of the specified DAC module.
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26 * @param[in] u32Ch Not used in M2351 Series DAC.
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27 * @param[in] u32TrgSrc Decides the trigger source. Valid values are:
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28 * - \ref DAC_WRITE_DAT_TRIGGER :Write DAC_DAT trigger
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29 * - \ref DAC_SOFTWARE_TRIGGER :Software trigger
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30 * - \ref DAC_LOW_LEVEL_TRIGGER :STDAC pin low level trigger
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31 * - \ref DAC_HIGH_LEVEL_TRIGGER :STDAC pin high level trigger
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32 * - \ref DAC_FALLING_EDGE_TRIGGER :STDAC pin falling edge trigger
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33 * - \ref DAC_RISING_EDGE_TRIGGER :STDAC pin rising edge trigger
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34 * - \ref DAC_TIMER0_TRIGGER :Timer 0 trigger
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35 * - \ref DAC_TIMER1_TRIGGER :Timer 1 trigger
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36 * - \ref DAC_TIMER2_TRIGGER :Timer 2 trigger
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37 * - \ref DAC_TIMER3_TRIGGER :Timer 3 trigger
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38 * - \ref DAC_EPWM0_TRIGGER :EPWM0 trigger
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39 * - \ref DAC_EPWM1_TRIGGER :EPWM1 trigger
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41 * @details The DAC conversion can be started by writing DAC_DAT, software trigger or hardware trigger.
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42 * When TRGEN (DAC_CTL[4]) is 0, the data conversion is started by writing DAC_DAT register.
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43 * When TRGEN (DAC_CTL[4]) is 1, the data conversion is started by SWTRG (DAC_SWTRG[0]) is set to 1,
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44 * external STDAC pin, timer event, or EPWM event.
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46 void DAC_Open(DAC_T *dac,
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50 dac->CTL &= ~(DAC_CTL_ETRGSEL_Msk | DAC_CTL_TRGSEL_Msk | DAC_CTL_TRGEN_Msk);
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52 dac->CTL |= (u32TrgSrc | DAC_CTL_DACEN_Msk);
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56 * @brief Disable DAC analog power.
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57 * @param[in] dac The pointer of the specified DAC module.
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58 * @param[in] u32Ch Not used in M2351 Series DAC.
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60 * @details Disable DAC analog power for saving power consumption.
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62 void DAC_Close(DAC_T *dac, uint32_t u32Ch)
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64 dac->CTL &= (~DAC_CTL_DACEN_Msk);
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68 * @brief Set delay time for DAC to become stable.
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69 * @param[in] dac The pointer of the specified DAC module.
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70 * @param[in] u32Delay Decides the DAC conversion settling time, the range is from 0~(1023/PCLK1*1000000) micro seconds.
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71 * @return Real DAC conversion settling time (micro second).
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72 * @details For example, DAC controller clock speed is 64MHz and DAC conversion setting time is 1 us, SETTLET (DAC_TCTL[9:0]) value must be greater than 0x40.
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73 * @note User needs to write appropriate value to meet DAC conversion settling time base on PCLK (APB clock) speed.
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75 uint32_t DAC_SetDelayTime(DAC_T *dac, uint32_t u32Delay)
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78 dac->TCTL = ((CLK_GetPCLK1Freq() * u32Delay / 1000000UL) & 0x3FFUL);
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80 return ((dac->TCTL) * 1000000UL / CLK_GetPCLK1Freq());
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85 /*@}*/ /* end of group DAC_EXPORTED_FUNCTIONS */
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87 /*@}*/ /* end of group DAC_Driver */
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89 /*@}*/ /* end of group Standard_Driver */
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91 /*** (C) COPYRIGHT 2017 Nuvoton Technology Corp. ***/
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