diff options
Diffstat (limited to 'lib/n32g45x/n32g45x_adc.c')
| -rw-r--r-- | lib/n32g45x/n32g45x_adc.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/lib/n32g45x/n32g45x_adc.c b/lib/n32g45x/n32g45x_adc.c new file mode 100644 index 00000000..6621bcb2 --- /dev/null +++ b/lib/n32g45x/n32g45x_adc.c @@ -0,0 +1,211 @@ +/***************************************************************************** + * Copyright (c) 2019, Nations Technologies Inc. + * + * All rights reserved. + * **************************************************************************** + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the disclaimer below. + * + * Nations' name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * DISCLAIMED. IN NO EVENT SHALL NATIONS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ****************************************************************************/ + +#include "stdint.h" +#include "n32g45x_adc.h" + +/** + * @brief Initializes the ADCx peripheral according to the specified parameters + * in the ADC_InitStruct. + * @param ADCx where x can be 1, 2 ,3 or 4 to select the ADC peripheral. + * @param ADC_InitStruct pointer to an ADC_InitType structure that contains + * the configuration information for the specified ADC peripheral. + */ +void ADC_Init(ADC_Module* ADCx, ADC_InitType* ADC_InitStruct) +{ + uint32_t tmpreg1 = 0; + uint8_t tmpreg2 = 0; + + /*---------------------------- ADCx CTRL1 Configuration -----------------*/ + /* Get the ADCx CTRL1 value */ + tmpreg1 = ADCx->CTRL1; + /* Clear DUALMOD and SCAN bits */ + tmpreg1 &= CTRL1_CLR_MASK; + /* Configure ADCx: Dual mode and scan conversion mode */ + /* Set DUALMOD bits according to WorkMode value */ + /* Set SCAN bit according to MultiChEn value */ + tmpreg1 |= (uint32_t)(ADC_InitStruct->WorkMode | ((uint32_t)ADC_InitStruct->MultiChEn << 8)); + /* Write to ADCx CTRL1 */ + ADCx->CTRL1 = tmpreg1; + + /*---------------------------- ADCx CTRL2 Configuration -----------------*/ + /* Get the ADCx CTRL2 value */ + tmpreg1 = ADCx->CTRL2; + /* Clear CONT, ALIGN and EXTSEL bits */ + tmpreg1 &= CTRL2_CLR_MASK; + /* Configure ADCx: external trigger event and continuous conversion mode */ + /* Set ALIGN bit according to DatAlign value */ + /* Set EXTSEL bits according to ExtTrigSelect value */ + /* Set CONT bit according to ContinueConvEn value */ + tmpreg1 |= (uint32_t)(ADC_InitStruct->DatAlign | ADC_InitStruct->ExtTrigSelect + | ((uint32_t)ADC_InitStruct->ContinueConvEn << 1)); + /* Write to ADCx CTRL2 */ + ADCx->CTRL2 = tmpreg1; + + /*---------------------------- ADCx RSEQ1 Configuration -----------------*/ + /* Get the ADCx RSEQ1 value */ + tmpreg1 = ADCx->RSEQ1; + /* Clear L bits */ + tmpreg1 &= RSEQ1_CLR_MASK; + /* Configure ADCx: regular channel sequence length */ + /* Set L bits according to ChsNumber value */ + tmpreg2 |= (uint8_t)(ADC_InitStruct->ChsNumber - (uint8_t)1); + tmpreg1 |= (uint32_t)tmpreg2 << 20; + /* Write to ADCx RSEQ1 */ + ADCx->RSEQ1 = tmpreg1; +} + + +/** + * @brief Configures for the selected ADC regular channel its corresponding + * rank in the sequencer and its sample time. + * @param ADCx where x can be 1, 2, 3 or 4 to select the ADC peripheral. + * @param ADC_Channel the ADC channel to configure. + * This parameter can be one of the following values: + * @arg ADC_CH_0 ADC Channel0 selected + * @arg ADC_CH_1 ADC Channel1 selected + * @arg ADC_CH_2 ADC Channel2 selected + * @arg ADC_CH_3 ADC Channel3 selected + * @arg ADC_CH_4 ADC Channel4 selected + * @arg ADC_CH_5 ADC Channel5 selected + * @arg ADC_CH_6 ADC Channel6 selected + * @arg ADC_CH_7 ADC Channel7 selected + * @arg ADC_CH_8 ADC Channel8 selected + * @arg ADC_CH_9 ADC Channel9 selected + * @arg ADC_CH_10 ADC Channel10 selected + * @arg ADC_CH_11 ADC Channel11 selected + * @arg ADC_CH_12 ADC Channel12 selected + * @arg ADC_CH_13 ADC Channel13 selected + * @arg ADC_CH_14 ADC Channel14 selected + * @arg ADC_CH_15 ADC Channel15 selected + * @arg ADC_CH_16 ADC Channel16 selected + * @arg ADC_CH_17 ADC Channel17 selected + * @arg ADC_CH_18 ADC Channel18 selected + * @param Rank The rank in the regular group sequencer. This parameter must be between 1 to 16. + * @param ADC_SampleTime The sample time value to be set for the selected channel. + * This parameter can be one of the following values: + * @arg ADC_SAMP_TIME_1CYCLES5 Sample time equal to 1.5 cycles + * @arg ADC_SAMP_TIME_7CYCLES5 Sample time equal to 7.5 cycles + * @arg ADC_SAMP_TIME_13CYCLES5 Sample time equal to 13.5 cycles + * @arg ADC_SAMP_TIME_28CYCLES5 Sample time equal to 28.5 cycles + * @arg ADC_SAMP_TIME_41CYCLES5 Sample time equal to 41.5 cycles + * @arg ADC_SAMP_TIME_55CYCLES5 Sample time equal to 55.5 cycles + * @arg ADC_SAMP_TIME_71CYCLES5 Sample time equal to 71.5 cycles + * @arg ADC_SAMP_TIME_239CYCLES5 Sample time equal to 239.5 cycles + */ + +void ADC_ConfigRegularChannel(ADC_Module* ADCx, uint8_t ADC_Channel, uint8_t Rank, uint8_t ADC_SampleTime) +{ + uint32_t tmpreg1 = 0, tmpreg2 = 0; + + if (ADC_Channel == ADC_CH_18) + { + tmpreg1 = ADCx->SAMPT3; + tmpreg1 &= (~0x00000007); + tmpreg1 |= ADC_SampleTime; + ADCx->SAMPT3 = tmpreg1; + } + else if (ADC_Channel > ADC_CH_9) /* if ADC_CH_10 ... ADC_CH_17 is selected */ + { + /* Get the old register value */ + tmpreg1 = ADCx->SAMPT1; + /* Calculate the mask to clear */ + tmpreg2 = SAMPT1_SMP_SET << (3 * (ADC_Channel - 10)); + /* Clear the old channel sample time */ + tmpreg1 &= ~tmpreg2; + /* Calculate the mask to set */ + tmpreg2 = (uint32_t)ADC_SampleTime << (3 * (ADC_Channel - 10)); + /* Set the new channel sample time */ + tmpreg1 |= tmpreg2; + /* Store the new register value */ + ADCx->SAMPT1 = tmpreg1; + } + else /* ADC_Channel include in ADC_Channel_[0..9] */ + { + /* Get the old register value */ + tmpreg1 = ADCx->SAMPT2; + /* Calculate the mask to clear */ + tmpreg2 = SAMPT2_SMP_SET << (3 * ADC_Channel); + /* Clear the old channel sample time */ + tmpreg1 &= ~tmpreg2; + /* Calculate the mask to set */ + tmpreg2 = (uint32_t)ADC_SampleTime << (3 * ADC_Channel); + /* Set the new channel sample time */ + tmpreg1 |= tmpreg2; + /* Store the new register value */ + ADCx->SAMPT2 = tmpreg1; + } + /* For Rank 1 to 6 */ + if (Rank < 7) + { + /* Get the old register value */ + tmpreg1 = ADCx->RSEQ3; + /* Calculate the mask to clear */ + tmpreg2 = SQR3_SEQ_SET << (5 * (Rank - 1)); + /* Clear the old SQx bits for the selected rank */ + tmpreg1 &= ~tmpreg2; + /* Calculate the mask to set */ + tmpreg2 = (uint32_t)ADC_Channel << (5 * (Rank - 1)); + /* Set the SQx bits for the selected rank */ + tmpreg1 |= tmpreg2; + /* Store the new register value */ + ADCx->RSEQ3 = tmpreg1; + } + /* For Rank 7 to 12 */ + else if (Rank < 13) + { + /* Get the old register value */ + tmpreg1 = ADCx->RSEQ2; + /* Calculate the mask to clear */ + tmpreg2 = SQR2_SEQ_SET << (5 * (Rank - 7)); + /* Clear the old SQx bits for the selected rank */ + tmpreg1 &= ~tmpreg2; + /* Calculate the mask to set */ + tmpreg2 = (uint32_t)ADC_Channel << (5 * (Rank - 7)); + /* Set the SQx bits for the selected rank */ + tmpreg1 |= tmpreg2; + /* Store the new register value */ + ADCx->RSEQ2 = tmpreg1; + } + /* For Rank 13 to 16 */ + else + { + /* Get the old register value */ + tmpreg1 = ADCx->RSEQ1; + /* Calculate the mask to clear */ + tmpreg2 = SQR1_SEQ_SET << (5 * (Rank - 13)); + /* Clear the old SQx bits for the selected rank */ + tmpreg1 &= ~tmpreg2; + /* Calculate the mask to set */ + tmpreg2 = (uint32_t)ADC_Channel << (5 * (Rank - 13)); + /* Set the SQx bits for the selected rank */ + tmpreg1 |= tmpreg2; + /* Store the new register value */ + ADCx->RSEQ1 = tmpreg1; + } +} + |