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khoatranyjKhiemNguyenT
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portable: rp_sci_b_spi: Add polling transfer support
Add polling transfer support for SCI B SPI Signed-off-by: Khoa Tran <[email protected]>
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‎zephyr/ra/CMakeLists.txt‎

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@@ -15,3 +15,5 @@ zephyr_library_sources_ifdef(CONFIG_USE_RA_FSP_SSI
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portable/src/rp_ssi/rp_ssi.c)
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zephyr_library_sources_ifdef(CONFIG_USE_RA_FSP_I3C
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portable/src/rp_i3c/rp_i3c.c)
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zephyr_library_sources_ifdef(CONFIG_USE_RA_FSP_SCI_B_SPI
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portable/src/rp_sci_b_spi/rp_sci_b_spi.c)

‎zephyr/ra/portable/inc/rp_sci_b_spi.h‎

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/*
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* Copyright (c) 2020 - 2025 Renesas Electronics Corporation and/or its affiliates
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef RP_SCI_B_SPI_H
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#define PR_SCI_B_SPI_H
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/***********************************************************************************************************************
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* Includes
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**********************************************************************************************************************/
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#include "r_spi_api.h"
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#include "r_sci_b_spi.h"
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/* Common macro for FSP header files. There is also a corresponding FSP_FOOTER macro at the end of this file. */
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FSP_HEADER
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/*****************************************************************************************************************//**
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* @ingroup SCI_B_SPI
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* @{
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********************************************************************************************************************/
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/***********************************************************************************************************************
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* Macro definitions
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**********************************************************************************************************************/
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/***********************************************************************************************************************
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* Typedef definitions
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**********************************************************************************************************************/
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/**********************************************************************************************************************
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* Exported global variables
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**********************************************************************************************************************/
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/**********************************************************************************************************************
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* Public Function Prototypes
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**********************************************************************************************************************/
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fsp_err_t RP_SCI_B_SPI_StartTransferPolling(spi_ctrl_t *const p_api_ctrl);
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fsp_err_t RP_SCI_B_SPI_WriteOneBytePolling(spi_ctrl_t *const p_api_ctrl,
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const uint8_t tx_byte);
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fsp_err_t RP_SCI_B_SPI_ReadOneBytePolling(spi_ctrl_t *const p_api_ctrl,
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uint8_t *p_rx_byte);
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fsp_err_t RP_SCI_B_SPI_EndTransferPolling(spi_ctrl_t *const p_api_ctrl);
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/* Common macro for FSP header files. There is also a corresponding FSP_HEADER macro at the top of this file. */
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FSP_FOOTER
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#endif
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/*******************************************************************************************************************//**
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* @} (end ingroup SCI_B_SPI)
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**********************************************************************************************************************/

‎zephyr/ra/portable/src/rp_sci_b_spi/rp_sci_b_spi.c‎

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/*
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* Copyright (c) 2020 - 2025 Renesas Electronics Corporation and/or its affiliates
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/***********************************************************************************************************************
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* Includes
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**********************************************************************************************************************/
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#include "r_sci_b_spi.h"
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#include "r_sci_b_spi_cfg.h"
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/***********************************************************************************************************************
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* Macro definitions
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**********************************************************************************************************************/
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#define SCI_B_SPI_PRV_DATA_REG_MASK (0xFFFFFF00)
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#define SCI_B_SPI_PRV_RDAT_MASK (0xFFU)
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/***********************************************************************************************************************
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* Typedef definitions
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**********************************************************************************************************************/
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/***********************************************************************************************************************
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* Private function declarations.
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**********************************************************************************************************************/
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/***********************************************************************************************************************
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* Functions
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**********************************************************************************************************************/
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/*******************************************************************************************************************//**
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* @addtogroup SCI_B_SPI
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* @{
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**********************************************************************************************************************/
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/*******************************************************************************************************************//**
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* Enable polling data transfer.
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*
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* @param p_api_ctrl Pointer to the control structure.
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*
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* @retval FSP_SUCCESS Read operation successfully completed.
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* @retval FSP_ERR_ASSERTION One of the following invalid parameters passed:
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* - Pointer p_api_ctrl is NULL
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*
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* @return See @ref RENESAS_ERROR_CODES or functions called by this function for other possible return codes. This
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* function calls:
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**********************************************************************************************************************/
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fsp_err_t RP_SCI_B_SPI_StartTransferPolling (spi_ctrl_t * const p_api_ctrl)
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{
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sci_b_spi_instance_ctrl_t * p_ctrl = (sci_b_spi_instance_ctrl_t *) p_api_ctrl;
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#if SCI_B_SPI_CFG_PARAM_CHECKING_ENABLE
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FSP_ASSERT(NULL != p_ctrl);
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#endif
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/* Set FCR. Reset FIFO/data registers. */
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p_ctrl->p_reg->FCR = (R_SCI_B0_FCR_TFRST_Msk | R_SCI_B0_FCR_RFRST_Msk);
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/* Enable transfer data bit */
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p_ctrl->p_reg->CCR0 |= (R_SCI_B0_CCR0_TE_Msk | R_SCI_B0_CCR0_RE_Msk);
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return FSP_SUCCESS;
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}
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/*******************************************************************************************************************//**
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* Transmit one byte data to a SPI device by polling.
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*
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* @param p_api_ctrl Pointer to the control structure.
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* @param p_tx_byte Pointer to the source buffer.
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*
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* @retval FSP_SUCCESS Write operation successfully completed.
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* @retval FSP_ERR_ASSERTION One of the following invalid parameters passed:
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* - Pointer p_api_ctrl is NULL
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* - Pointer to source is NULL
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*
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* @return See @ref RENESAS_ERROR_CODES or functions called by this function for other possible return codes. This
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* function calls:
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**********************************************************************************************************************/
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fsp_err_t RP_SCI_B_SPI_WriteOneBytePolling (spi_ctrl_t * const p_api_ctrl,
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const uint8_t tx_byte)
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{
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sci_b_spi_instance_ctrl_t * p_ctrl = (sci_b_spi_instance_ctrl_t *) p_api_ctrl;
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#if SCI_B_SPI_CFG_PARAM_CHECKING_ENABLE
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FSP_ASSERT(NULL != p_ctrl);
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#endif
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/* Wait the TDR data to empty*/
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while (!p_ctrl->p_reg->CSR_b.TDRE) {
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}
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/* Write data to TDR */
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p_ctrl->p_reg->TDR = (SCI_B_SPI_PRV_DATA_REG_MASK | tx_byte);
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return FSP_SUCCESS;
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}
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/*******************************************************************************************************************//**
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* Read one byte data from a SPI device by polling.
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*
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* @param p_api_ctrl Pointer to the control structure.
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* @param p_rx_byte Pointer to the source buffer.
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*
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* @retval FSP_SUCCESS Read operation successfully completed.
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* @retval FSP_ERR_ASSERTION One of the following invalid parameters passed:
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* - Pointer p_api_ctrl is NULL
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* - Pointer to source is NULL
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*
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* @return See @ref RENESAS_ERROR_CODES or functions called by this function for other possible return codes. This
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* function calls:
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**********************************************************************************************************************/
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fsp_err_t RP_SCI_B_SPI_ReadOneBytePolling (spi_ctrl_t * const p_api_ctrl,
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uint8_t * p_rx_byte)
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{
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sci_b_spi_instance_ctrl_t * p_ctrl = (sci_b_spi_instance_ctrl_t *) p_api_ctrl;
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#if SCI_B_SPI_CFG_PARAM_CHECKING_ENABLE
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FSP_ASSERT(NULL != p_ctrl);
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FSP_ASSERT(NULL != p_rx_byte);
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#endif
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/* Wait until data available in RDR */
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while (!p_ctrl->p_reg->CSR_b.RDRF) {
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}
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/* Read the data in RDR register */
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*p_rx_byte = (uint8_t)(p_ctrl->p_reg->RDR & SCI_B_SPI_PRV_RDAT_MASK);
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return FSP_SUCCESS;
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}
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/*******************************************************************************************************************//**
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* End polling data transfer.
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*
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* @param p_api_ctrl Pointer to the control structure.
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*
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* @retval FSP_SUCCESS Read operation successfully completed.
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* @retval FSP_ERR_ASSERTION One of the following invalid parameters passed:
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* - Pointer p_api_ctrl is NULL
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*
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* @return See @ref RENESAS_ERROR_CODES or functions called by this function for other possible return codes. This
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* function calls:
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**********************************************************************************************************************/
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fsp_err_t RP_SCI_B_SPI_EndTransferPolling (spi_ctrl_t * const p_api_ctrl)
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{
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sci_b_spi_instance_ctrl_t * p_ctrl = (sci_b_spi_instance_ctrl_t *) p_api_ctrl;
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uint32_t ccr0_temp;
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#if SCI_B_SPI_CFG_PARAM_CHECKING_ENABLE
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FSP_ASSERT(NULL != p_ctrl);
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#endif
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/* Wait for transmision complete */
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FSP_HARDWARE_REGISTER_WAIT(p_ctrl->p_reg->CSR_b.TEND, 1)
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/* Disable the transfer and receive bit */
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ccr0_temp = p_ctrl->p_reg->CCR0;
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ccr0_temp &= (uint32_t)~(R_SCI_B0_CCR0_TE_Msk | R_SCI_B0_CCR0_RE_Msk);
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p_ctrl->p_reg->CCR0 = ccr0_temp;
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return FSP_SUCCESS;
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}

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