/**
******************************************************************************
* @file py32f002b_ll_spi.c
* @author MCU Application Team
* @brief SPI LL module driver.
******************************************************************************
Additional table :
DataSize = SPI_DATASIZE_8BIT:
+----------------------------------------------------------------------------------------------+
| | | 2Lines Fullduplex | 2Lines RxOnly | 1Line |
| Process | Tranfert mode |---------------------|----------------------|----------------------|
| | | Master | Slave | Master | Slave | Master | Slave |
|==============================================================================================|
| TX | Polling | Fpclk/2 | Fpclk/32 | NA | NA | NA | NA |
| / |----------------|----------|----------|-----------|----------|-----------|----------|
| RX | Interrupt | Fpclk/2 | Fpclk/32 | NA | NA | NA | NA |
| |----------------|----------|----------|-----------|----------|-----------|----------|
|=========|================|==========|==========|===========|==========|===========|==========|
| | Polling | NA | NA | Fpclk/4 | Fpclk/8 | Fpclk/4 | Fpclk/8 |
| R |----------------|----------|----------|-----------|----------|-----------|----------|
| X | Interrupt | NA | NA | Fpclk/16 | Fpclk/16 | Fpclk/16 | Fpclk/16 |
| |----------------|----------|----------|-----------|----------|-----------|----------|
|=========|================|==========|==========|===========|==========|===========|==========|
| | Polling | NA | NA | NA | NA | Fpclk/2 | Fpclk/8 |
| T |----------------|----------|----------|-----------|----------|-----------|----------|
| X | Interrupt | NA | NA | NA | NA | Fpclk/2 | Fpclk/16 |
| |----------------|----------|----------|-----------|----------|-----------|----------|
+----------------------------------------------------------------------------------------------+
DataSize = SPI_DATASIZE_16BIT:
+----------------------------------------------------------------------------------------------+
| | | 2Lines Fullduplex | 2Lines RxOnly | 1Line |
| Process | Tranfert mode |---------------------|----------------------|----------------------|
| | | Master | Slave | Master | Slave | Master | Slave |
|==============================================================================================|
| TX | Polling | Fpclk/2 | Fpclk/16 | NA | NA | NA | NA |
| / |----------------|----------|----------|-----------|----------|-----------|----------|
| RX | Interrupt | Fpclk/2 | Fpclk/16 | NA | NA | NA | NA |
| |----------------|----------|----------|-----------|----------|-----------|----------|
|=========|================|==========|==========|===========|==========|===========|==========|
| | Polling | NA | NA | Fpclk/2 | Fpclk/4 | Fpclk/2 | Fpclk/4 |
| |----------------|----------|----------|-----------|----------|-----------|----------|
| R | Interrupt | NA | NA | Fpclk/2 | Fpclk/8 | Fpclk/2 | Fpclk/8 |
| X |----------------|----------|----------|-----------|----------|-----------|----------|
|=========|================|==========|==========|===========|==========|===========|==========|
| | Polling | NA | NA | NA | NA | Fpclk/2 | Fpclk/4 |
| |----------------|----------|----------|-----------|----------|-----------|----------|
| T | Interrupt | NA | NA | NA | NA | Fpclk/2 | Fpclk/8 |
| X |----------------|----------|----------|-----------|----------|-----------|----------|
+----------------------------------------------------------------------------------------------+
@note The max SPI frequency depend on SPI data size (8bits, 16bits),
SPI mode(2 Lines fullduplex, 2 lines RxOnly, 1 line TX/RX) and Process mode (Polling, IT).
******************************************************************************
* @attention
*
* © Copyright (c) 2023 Puya Semiconductor Co.
* All rights reserved.
*
* This software component is licensed by Puya under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
* @attention
*
* © Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
#if defined(USE_FULL_LL_DRIVER)
/* Includes ------------------------------------------------------------------*/
#include "py32f002b_ll_spi.h"
#include "py32f002b_ll_bus.h"
#include "py32f002b_ll_rcc.h"
#ifdef USE_FULL_ASSERT
#include "py32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */
/** @addtogroup PY32F002B_LL_Driver
* @{
*/
#if defined (SPI1)
/** @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_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))
/**
* @}
*/
/* 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 (SPIx == SPI1)
{
/* Force reset of SPI clock */
LL_APB1_GRP2_ForceReset(LL_APB1_GRP2_PERIPH_SPI1);
/* Release reset of SPI clock */
LL_APB1_GRP2_ReleaseReset(LL_APB1_GRP2_PERIPH_SPI1);
status = SUCCESS;
}
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 peripheral 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));
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
* - 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
* - DataWidth: SPI_CR1_DFF bit
*/
MODIFY_REG(SPIx->CR1,
SPI_CR1_CLEAR_MASK,
SPI_InitStruct->TransferDirection | SPI_InitStruct->Mode |
SPI_InitStruct->ClockPolarity | SPI_InitStruct->ClockPhase |
(SPI_InitStruct->NSS & SPI_CR1_SSM) | SPI_InitStruct->BaudRate |
SPI_InitStruct->BitOrder | SPI_InitStruct->DataWidth);
/*---------------------------- SPIx CR2 Configuration ------------------------
* Configure SPIx CR2 with parameters:
* - NSS management: SSOE bit
*/
MODIFY_REG(SPIx->CR2, SPI_CR2_SSOE, ((SPI_InitStruct->NSS >> 16U) & SPI_CR2_SSOE));
status = SUCCESS;
}
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;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* defined (SPI1) */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */
/************************ (C) COPYRIGHT Puya *****END OF FILE****/