diff options
Diffstat (limited to 'ext/hal/st/stm32cube/stm32f1xx/drivers/src/stm32f1xx_ll_spi.c')
| -rw-r--r-- | ext/hal/st/stm32cube/stm32f1xx/drivers/src/stm32f1xx_ll_spi.c | 562 |
1 files changed, 562 insertions, 0 deletions
diff --git a/ext/hal/st/stm32cube/stm32f1xx/drivers/src/stm32f1xx_ll_spi.c b/ext/hal/st/stm32cube/stm32f1xx/drivers/src/stm32f1xx_ll_spi.c new file mode 100644 index 000000000..67262c96e --- /dev/null +++ b/ext/hal/st/stm32cube/stm32f1xx/drivers/src/stm32f1xx_ll_spi.c @@ -0,0 +1,562 @@ +/** + ****************************************************************************** + * @file stm32f1xx_ll_spi.c + * @author MCD Application Team + * @version V1.1.0 + * @date 14-April-2017 + * @brief SPI LL module driver. + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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. + * + ****************************************************************************** + */ +#if defined(USE_FULL_LL_DRIVER) + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f1xx_ll_spi.h" +#include "stm32f1xx_ll_bus.h" +#include "stm32f1xx_ll_rcc.h" + +#ifdef USE_FULL_ASSERT +#include "stm32_assert.h" +#else +#define assert_param(expr) ((void)0U) +#endif + +/** @addtogroup STM32F1xx_LL_Driver + * @{ + */ + +#if defined (SPI1) || defined (SPI2) || defined (SPI3) + +/** @addtogroup SPI_LL + * @{ + */ + +/* Private types -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ + +/* Private constants ---------------------------------------------------------*/ +/** @defgroup SPI_LL_Private_Constants SPI Private Constants + * @{ + */ +/* SPI registers Masks */ +#define SPI_CR1_CLEAR_MASK (SPI_CR1_CPHA | SPI_CR1_CPOL | SPI_CR1_MSTR | \ + SPI_CR1_BR | SPI_CR1_LSBFIRST | SPI_CR1_SSI | \ + SPI_CR1_SSM | SPI_CR1_RXONLY | SPI_CR1_DFF | \ + SPI_CR1_CRCNEXT | SPI_CR1_CRCEN | SPI_CR1_BIDIOE | \ + SPI_CR1_BIDIMODE) +/** + * @} + */ + +/* Private macros ------------------------------------------------------------*/ +/** @defgroup SPI_LL_Private_Macros SPI Private Macros + * @{ + */ +#define IS_LL_SPI_TRANSFER_DIRECTION(__VALUE__) (((__VALUE__) == LL_SPI_FULL_DUPLEX) \ + || ((__VALUE__) == LL_SPI_SIMPLEX_RX) \ + || ((__VALUE__) == LL_SPI_HALF_DUPLEX_RX) \ + || ((__VALUE__) == LL_SPI_HALF_DUPLEX_TX)) + +#define IS_LL_SPI_MODE(__VALUE__) (((__VALUE__) == LL_SPI_MODE_MASTER) \ + || ((__VALUE__) == LL_SPI_MODE_SLAVE)) + +#define IS_LL_SPI_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_SPI_DATAWIDTH_8BIT) \ + || ((__VALUE__) == LL_SPI_DATAWIDTH_16BIT)) + +#define IS_LL_SPI_POLARITY(__VALUE__) (((__VALUE__) == LL_SPI_POLARITY_LOW) \ + || ((__VALUE__) == LL_SPI_POLARITY_HIGH)) + +#define IS_LL_SPI_PHASE(__VALUE__) (((__VALUE__) == LL_SPI_PHASE_1EDGE) \ + || ((__VALUE__) == LL_SPI_PHASE_2EDGE)) + +#define IS_LL_SPI_NSS(__VALUE__) (((__VALUE__) == LL_SPI_NSS_SOFT) \ + || ((__VALUE__) == LL_SPI_NSS_HARD_INPUT) \ + || ((__VALUE__) == LL_SPI_NSS_HARD_OUTPUT)) + +#define IS_LL_SPI_BAUDRATE(__VALUE__) (((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV2) \ + || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV4) \ + || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV8) \ + || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV16) \ + || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV32) \ + || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV64) \ + || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV128) \ + || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV256)) + +#define IS_LL_SPI_BITORDER(__VALUE__) (((__VALUE__) == LL_SPI_LSB_FIRST) \ + || ((__VALUE__) == LL_SPI_MSB_FIRST)) + +#define IS_LL_SPI_CRCCALCULATION(__VALUE__) (((__VALUE__) == LL_SPI_CRCCALCULATION_ENABLE) \ + || ((__VALUE__) == LL_SPI_CRCCALCULATION_DISABLE)) + +#define IS_LL_SPI_CRC_POLYNOMIAL(__VALUE__) ((__VALUE__) >= 0x1U) + +/** + * @} + */ + +/* Private function prototypes -----------------------------------------------*/ + +/* Exported functions --------------------------------------------------------*/ +/** @addtogroup SPI_LL_Exported_Functions + * @{ + */ + +/** @addtogroup SPI_LL_EF_Init + * @{ + */ + +/** + * @brief De-initialize the SPI registers to their default reset values. + * @param SPIx SPI Instance + * @retval An ErrorStatus enumeration value: + * - SUCCESS: SPI registers are de-initialized + * - ERROR: SPI registers are not de-initialized + */ +ErrorStatus LL_SPI_DeInit(SPI_TypeDef *SPIx) +{ + ErrorStatus status = ERROR; + + /* Check the parameters */ + assert_param(IS_SPI_ALL_INSTANCE(SPIx)); + +#if defined(SPI1) + if (SPIx == SPI1) + { + /* Force reset of SPI clock */ + LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI1); + + /* Release reset of SPI clock */ + LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI1); + + status = SUCCESS; + } +#endif /* SPI1 */ +#if defined(SPI2) + if (SPIx == SPI2) + { + /* Force reset of SPI clock */ + LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_SPI2); + + /* Release reset of SPI clock */ + LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_SPI2); + + status = SUCCESS; + } +#endif /* SPI2 */ +#if defined(SPI3) + if (SPIx == SPI3) + { + /* Force reset of SPI clock */ + LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_SPI3); + + /* Release reset of SPI clock */ + LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_SPI3); + + status = SUCCESS; + } +#endif /* SPI3 */ + + return status; +} + +/** + * @brief Initialize the SPI registers according to the specified parameters in SPI_InitStruct. + * @note As some bits in SPI configuration registers can only be written when the SPI is disabled (SPI_CR1_SPE bit =0), + * SPI IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. + * @param SPIx SPI Instance + * @param SPI_InitStruct pointer to a @ref LL_SPI_InitTypeDef structure + * @retval An ErrorStatus enumeration value. (Return always SUCCESS) + */ +ErrorStatus LL_SPI_Init(SPI_TypeDef *SPIx, LL_SPI_InitTypeDef *SPI_InitStruct) +{ + ErrorStatus status = ERROR; + + /* Check the SPI Instance SPIx*/ + assert_param(IS_SPI_ALL_INSTANCE(SPIx)); + + /* Check the SPI parameters from SPI_InitStruct*/ + assert_param(IS_LL_SPI_TRANSFER_DIRECTION(SPI_InitStruct->TransferDirection)); + assert_param(IS_LL_SPI_MODE(SPI_InitStruct->Mode)); + assert_param(IS_LL_SPI_DATAWIDTH(SPI_InitStruct->DataWidth)); + assert_param(IS_LL_SPI_POLARITY(SPI_InitStruct->ClockPolarity)); + assert_param(IS_LL_SPI_PHASE(SPI_InitStruct->ClockPhase)); + assert_param(IS_LL_SPI_NSS(SPI_InitStruct->NSS)); + assert_param(IS_LL_SPI_BAUDRATE(SPI_InitStruct->BaudRate)); + assert_param(IS_LL_SPI_BITORDER(SPI_InitStruct->BitOrder)); + assert_param(IS_LL_SPI_CRCCALCULATION(SPI_InitStruct->CRCCalculation)); + + if (LL_SPI_IsEnabled(SPIx) == 0x00000000U) + { + /*---------------------------- SPIx CR1 Configuration ------------------------ + * Configure SPIx CR1 with parameters: + * - TransferDirection: SPI_CR1_BIDIMODE, SPI_CR1_BIDIOE and SPI_CR1_RXONLY bits + * - Master/Slave Mode: SPI_CR1_MSTR bit + * - DataWidth: SPI_CR1_DFF bit + * - ClockPolarity: SPI_CR1_CPOL bit + * - ClockPhase: SPI_CR1_CPHA bit + * - NSS management: SPI_CR1_SSM bit + * - BaudRate prescaler: SPI_CR1_BR[2:0] bits + * - BitOrder: SPI_CR1_LSBFIRST bit + * - CRCCalculation: SPI_CR1_CRCEN bit + */ + MODIFY_REG(SPIx->CR1, + SPI_CR1_CLEAR_MASK, + SPI_InitStruct->TransferDirection | SPI_InitStruct->Mode | SPI_InitStruct->DataWidth | + SPI_InitStruct->ClockPolarity | SPI_InitStruct->ClockPhase | + SPI_InitStruct->NSS | SPI_InitStruct->BaudRate | + SPI_InitStruct->BitOrder | SPI_InitStruct->CRCCalculation); + + /*---------------------------- SPIx CR2 Configuration ------------------------ + * Configure SPIx CR2 with parameters: + * - NSS management: SSOE bit + */ + MODIFY_REG(SPIx->CR2, SPI_CR2_SSOE, (SPI_InitStruct->NSS >> 16U)); + + /*---------------------------- SPIx CRCPR Configuration ---------------------- + * Configure SPIx CRCPR with parameters: + * - CRCPoly: CRCPOLY[15:0] bits + */ + if (SPI_InitStruct->CRCCalculation == LL_SPI_CRCCALCULATION_ENABLE) + { + assert_param(IS_LL_SPI_CRC_POLYNOMIAL(SPI_InitStruct->CRCPoly)); + LL_SPI_SetCRCPolynomial(SPIx, SPI_InitStruct->CRCPoly); + } + status = SUCCESS; + } + +#if defined (SPI_I2S_SUPPORT) + /* Activate the SPI mode (Reset I2SMOD bit in I2SCFGR register) */ + CLEAR_BIT(SPIx->I2SCFGR, SPI_I2SCFGR_I2SMOD); +#endif /* SPI_I2S_SUPPORT */ + return status; +} + +/** + * @brief Set each @ref LL_SPI_InitTypeDef field to default value. + * @param SPI_InitStruct pointer to a @ref LL_SPI_InitTypeDef structure + * whose fields will be set to default values. + * @retval None + */ +void LL_SPI_StructInit(LL_SPI_InitTypeDef *SPI_InitStruct) +{ + /* Set SPI_InitStruct fields to default values */ + SPI_InitStruct->TransferDirection = LL_SPI_FULL_DUPLEX; + SPI_InitStruct->Mode = LL_SPI_MODE_SLAVE; + SPI_InitStruct->DataWidth = LL_SPI_DATAWIDTH_8BIT; + SPI_InitStruct->ClockPolarity = LL_SPI_POLARITY_LOW; + SPI_InitStruct->ClockPhase = LL_SPI_PHASE_1EDGE; + SPI_InitStruct->NSS = LL_SPI_NSS_HARD_INPUT; + SPI_InitStruct->BaudRate = LL_SPI_BAUDRATEPRESCALER_DIV2; + SPI_InitStruct->BitOrder = LL_SPI_MSB_FIRST; + SPI_InitStruct->CRCCalculation = LL_SPI_CRCCALCULATION_DISABLE; + SPI_InitStruct->CRCPoly = 7U; +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +#if defined(SPI_I2S_SUPPORT) +/** @addtogroup I2S_LL + * @{ + */ + +/* Private types -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private constants ---------------------------------------------------------*/ +/** @defgroup I2S_LL_Private_Constants I2S Private Constants + * @{ + */ +/* I2S registers Masks */ +#define I2S_I2SCFGR_CLEAR_MASK (SPI_I2SCFGR_CHLEN | SPI_I2SCFGR_DATLEN | \ + SPI_I2SCFGR_CKPOL | SPI_I2SCFGR_I2SSTD | \ + SPI_I2SCFGR_I2SCFG | SPI_I2SCFGR_I2SMOD ) + +#define I2S_I2SPR_CLEAR_MASK 0x0002U +/** + * @} + */ +/* Private macros ------------------------------------------------------------*/ +/** @defgroup I2S_LL_Private_Macros I2S Private Macros + * @{ + */ + +#define IS_LL_I2S_DATAFORMAT(__VALUE__) (((__VALUE__) == LL_I2S_DATAFORMAT_16B) \ + || ((__VALUE__) == LL_I2S_DATAFORMAT_16B_EXTENDED) \ + || ((__VALUE__) == LL_I2S_DATAFORMAT_24B) \ + || ((__VALUE__) == LL_I2S_DATAFORMAT_32B)) + +#define IS_LL_I2S_CPOL(__VALUE__) (((__VALUE__) == LL_I2S_POLARITY_LOW) \ + || ((__VALUE__) == LL_I2S_POLARITY_HIGH)) + +#define IS_LL_I2S_STANDARD(__VALUE__) (((__VALUE__) == LL_I2S_STANDARD_PHILIPS) \ + || ((__VALUE__) == LL_I2S_STANDARD_MSB) \ + || ((__VALUE__) == LL_I2S_STANDARD_LSB) \ + || ((__VALUE__) == LL_I2S_STANDARD_PCM_SHORT) \ + || ((__VALUE__) == LL_I2S_STANDARD_PCM_LONG)) + +#define IS_LL_I2S_MODE(__VALUE__) (((__VALUE__) == LL_I2S_MODE_SLAVE_TX) \ + || ((__VALUE__) == LL_I2S_MODE_SLAVE_RX) \ + || ((__VALUE__) == LL_I2S_MODE_MASTER_TX) \ + || ((__VALUE__) == LL_I2S_MODE_MASTER_RX)) + +#define IS_LL_I2S_MCLK_OUTPUT(__VALUE__) (((__VALUE__) == LL_I2S_MCLK_OUTPUT_ENABLE) \ + || ((__VALUE__) == LL_I2S_MCLK_OUTPUT_DISABLE)) + +#define IS_LL_I2S_AUDIO_FREQ(__VALUE__) ((((__VALUE__) >= LL_I2S_AUDIOFREQ_8K) \ + && ((__VALUE__) <= LL_I2S_AUDIOFREQ_192K)) \ + || ((__VALUE__) == LL_I2S_AUDIOFREQ_DEFAULT)) + +#define IS_LL_I2S_PRESCALER_LINEAR(__VALUE__) ((__VALUE__) >= 0x2U) + +#define IS_LL_I2S_PRESCALER_PARITY(__VALUE__) (((__VALUE__) == LL_I2S_PRESCALER_PARITY_EVEN) \ + || ((__VALUE__) == LL_I2S_PRESCALER_PARITY_ODD)) +/** + * @} + */ + +/* Private function prototypes -----------------------------------------------*/ + +/* Exported functions --------------------------------------------------------*/ +/** @addtogroup I2S_LL_Exported_Functions + * @{ + */ + +/** @addtogroup I2S_LL_EF_Init + * @{ + */ + +/** + * @brief De-initialize the SPI/I2S registers to their default reset values. + * @param SPIx SPI Instance + * @retval An ErrorStatus enumeration value: + * - SUCCESS: SPI registers are de-initialized + * - ERROR: SPI registers are not de-initialized + */ +ErrorStatus LL_I2S_DeInit(SPI_TypeDef *SPIx) +{ + return LL_SPI_DeInit(SPIx); +} + +/** + * @brief Initializes the SPI/I2S registers according to the specified parameters in I2S_InitStruct. + * @note As some bits in SPI configuration registers can only be written when the SPI is disabled (SPI_CR1_SPE bit =0), + * SPI IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. + * @param SPIx SPI Instance + * @param I2S_InitStruct pointer to a @ref LL_I2S_InitTypeDef structure + * @retval An ErrorStatus enumeration value: + * - SUCCESS: SPI registers are Initialized + * - ERROR: SPI registers are not Initialized + */ +ErrorStatus LL_I2S_Init(SPI_TypeDef *SPIx, LL_I2S_InitTypeDef *I2S_InitStruct) +{ + uint16_t i2sdiv = 2U, i2sodd = 0U, packetlength = 1U; + uint32_t tmp = 0U; + uint32_t sourceclock = 0U; +#if defined(I2S2_I2S3_CLOCK_FEATURE) +#else + LL_RCC_ClocksTypeDef rcc_clocks; +#endif /* I2S2_I2S3_CLOCK_FEATURE */ + ErrorStatus status = ERROR; + + /* Check the I2S parameters */ + assert_param(IS_I2S_ALL_INSTANCE(SPIx)); + assert_param(IS_LL_I2S_MODE(I2S_InitStruct->Mode)); + assert_param(IS_LL_I2S_STANDARD(I2S_InitStruct->Standard)); + assert_param(IS_LL_I2S_DATAFORMAT(I2S_InitStruct->DataFormat)); + assert_param(IS_LL_I2S_MCLK_OUTPUT(I2S_InitStruct->MCLKOutput)); + assert_param(IS_LL_I2S_AUDIO_FREQ(I2S_InitStruct->AudioFreq)); + assert_param(IS_LL_I2S_CPOL(I2S_InitStruct->ClockPolarity)); + + if (LL_I2S_IsEnabled(SPIx) == 0x00000000U) + { + /*---------------------------- SPIx I2SCFGR Configuration -------------------- + * Configure SPIx I2SCFGR with parameters: + * - Mode: SPI_I2SCFGR_I2SCFG[1:0] bit + * - Standard: SPI_I2SCFGR_I2SSTD[1:0] and SPI_I2SCFGR_PCMSYNC bits + * - DataFormat: SPI_I2SCFGR_CHLEN and SPI_I2SCFGR_DATLEN bits + * - ClockPolarity: SPI_I2SCFGR_CKPOL bit + */ + + /* Write to SPIx I2SCFGR */ + MODIFY_REG(SPIx->I2SCFGR, + I2S_I2SCFGR_CLEAR_MASK, + I2S_InitStruct->Mode | I2S_InitStruct->Standard | + I2S_InitStruct->DataFormat | I2S_InitStruct->ClockPolarity | + SPI_I2SCFGR_I2SMOD); + + /*---------------------------- SPIx I2SPR Configuration ---------------------- + * Configure SPIx I2SPR with parameters: + * - MCLKOutput: SPI_I2SPR_MCKOE bit + * - AudioFreq: SPI_I2SPR_I2SDIV[7:0] and SPI_I2SPR_ODD bits + */ + + /* If the requested audio frequency is not the default, compute the prescaler (i2sodd, i2sdiv) + * else, default values are used: i2sodd = 0U, i2sdiv = 2U. + */ + if (I2S_InitStruct->AudioFreq != LL_I2S_AUDIOFREQ_DEFAULT) + { + /* Check the frame length (For the Prescaler computing) + * Default value: LL_I2S_DATAFORMAT_16B (packetlength = 1U). + */ + if (I2S_InitStruct->DataFormat != LL_I2S_DATAFORMAT_16B) + { + /* Packet length is 32 bits */ + packetlength = 2U; + } +#if defined(I2S2_I2S3_CLOCK_FEATURE) + /* If an external I2S clock has to be used, the specific define should be set + in the project configuration or in the stm32f1xx_ll_rcc.h file */ + if(SPIx == SPI2) + { + /* Get the I2S source clock value */ + sourceclock = LL_RCC_GetI2SClockFreq(LL_RCC_I2S2_CLKSOURCE); + } + else /* SPI3 */ + { + /* Get the I2S source clock value */ + sourceclock = LL_RCC_GetI2SClockFreq(LL_RCC_I2S3_CLKSOURCE); + } +#else + /* I2S Clock source is System clock: Get System Clock frequency */ + LL_RCC_GetSystemClocksFreq(&rcc_clocks); + + /* Get the source clock value: based on System Clock value */ + sourceclock = rcc_clocks.SYSCLK_Frequency; +#endif /* I2S2_I2S3_CLOCK_FEATURE */ + /* Compute the Real divider depending on the MCLK output state with a floating point */ + if (I2S_InitStruct->MCLKOutput == LL_I2S_MCLK_OUTPUT_ENABLE) + { + /* MCLK output is enabled */ + tmp = (uint16_t)(((((sourceclock / 256U) * 10U) / I2S_InitStruct->AudioFreq)) + 5U); + } + else + { + /* MCLK output is disabled */ + tmp = (uint16_t)(((((sourceclock / (32U * packetlength)) * 10U) / I2S_InitStruct->AudioFreq)) + 5U); + } + + /* Remove the floating point */ + tmp = tmp / 10U; + + /* Check the parity of the divider */ + i2sodd = (uint16_t)(tmp & (uint16_t)0x0001U); + + /* Compute the i2sdiv prescaler */ + i2sdiv = (uint16_t)((tmp - i2sodd) / 2U); + + /* Get the Mask for the Odd bit (SPI_I2SPR[8]) register */ + i2sodd = (uint16_t)(i2sodd << 8U); + } + + /* Test if the divider is 1 or 0 or greater than 0xFF */ + if ((i2sdiv < 2U) || (i2sdiv > 0xFFU)) + { + /* Set the default values */ + i2sdiv = 2U; + i2sodd = 0U; + } + + /* Write to SPIx I2SPR register the computed value */ + WRITE_REG(SPIx->I2SPR, i2sdiv | i2sodd | I2S_InitStruct->MCLKOutput); + + status = SUCCESS; + } + return status; +} + +/** + * @brief Set each @ref LL_I2S_InitTypeDef field to default value. + * @param I2S_InitStruct pointer to a @ref LL_I2S_InitTypeDef structure + * whose fields will be set to default values. + * @retval None + */ +void LL_I2S_StructInit(LL_I2S_InitTypeDef *I2S_InitStruct) +{ + /*--------------- Reset I2S init structure parameters values -----------------*/ + I2S_InitStruct->Mode = LL_I2S_MODE_SLAVE_TX; + I2S_InitStruct->Standard = LL_I2S_STANDARD_PHILIPS; + I2S_InitStruct->DataFormat = LL_I2S_DATAFORMAT_16B; + I2S_InitStruct->MCLKOutput = LL_I2S_MCLK_OUTPUT_DISABLE; + I2S_InitStruct->AudioFreq = LL_I2S_AUDIOFREQ_DEFAULT; + I2S_InitStruct->ClockPolarity = LL_I2S_POLARITY_LOW; +} + +/** + * @brief Set linear and parity prescaler. + * @note To calculate value of PrescalerLinear(I2SDIV[7:0] bits) and PrescalerParity(ODD bit)\n + * Check Audio frequency table and formulas inside Reference Manual (SPI/I2S). + * @param SPIx SPI Instance + * @param PrescalerLinear value: Min_Data=0x02 and Max_Data=0xFF. + * @param PrescalerParity This parameter can be one of the following values: + * @arg @ref LL_I2S_PRESCALER_PARITY_EVEN + * @arg @ref LL_I2S_PRESCALER_PARITY_ODD + * @retval None + */ +void LL_I2S_ConfigPrescaler(SPI_TypeDef *SPIx, uint32_t PrescalerLinear, uint32_t PrescalerParity) +{ + /* Check the I2S parameters */ + assert_param(IS_I2S_ALL_INSTANCE(SPIx)); + assert_param(IS_LL_I2S_PRESCALER_LINEAR(PrescalerLinear)); + assert_param(IS_LL_I2S_PRESCALER_PARITY(PrescalerParity)); + + /* Write to SPIx I2SPR */ + MODIFY_REG(SPIx->I2SPR, SPI_I2SPR_I2SDIV | SPI_I2SPR_ODD, PrescalerLinear | (PrescalerParity << 8U)); +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ +#endif /* SPI_I2S_SUPPORT */ + +#endif /* defined (SPI1) || defined (SPI2) || defined (SPI3) */ + +/** + * @} + */ + +#endif /* USE_FULL_LL_DRIVER */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |