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224 lines
7.2 KiB
224 lines
7.2 KiB
/*
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/ _____) _ | |
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( (____ _____ ____ _| |_ _____ ____| |__
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\____ \| ___ | (_ _) ___ |/ ___) _ \
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_____) ) ____| | | || |_| ____( (___| | | |
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(______/|_____)_|_|_| \__)_____)\____)_| |_|
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(C)2013 Semtech
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Description: Bleeper board SPI driver implementation
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License: Revised BSD License, see LICENSE.TXT file include in the project
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Maintainer: Miguel Luis and Gregory Cristian
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*/
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/*******************************************************************************
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* @file hw_spi.c
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* @author MCD Application Team
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* @version V1.1.2
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* @date 08-September-2017
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* @brief manages the SPI interface
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2017 STMicroelectronics International N.V.
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* All rights reserved.</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted, provided that the following conditions are met:
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*
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* 1. Redistribution of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of other
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* contributors to this software may be used to endorse or promote products
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* derived from this software without specific written permission.
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* 4. This software, including modifications and/or derivative works of this
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* software, must execute solely and exclusively on microcontroller or
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* microprocessor devices manufactured by or for STMicroelectronics.
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* 5. Redistribution and use of this software other than as permitted under
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* this license is void and will automatically terminate your rights under
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* this license.
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*
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* THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
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* RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT
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* SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "hw.h"
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#include "utilities.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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static SPI_HandleTypeDef hspi;
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/* Private function prototypes -----------------------------------------------*/
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/*!
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* @brief Calculates Spi Divisor based on Spi Frequency and Mcu Frequency
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*
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* @param [IN] Spi Frequency
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* @retval Spi divisor
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*/
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static uint32_t SpiFrequency( uint32_t hz );
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/* Exported functions ---------------------------------------------------------*/
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/*!
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* @brief Initializes the SPI object and MCU peripheral
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*
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* @param [IN] none
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*/
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void HW_SPI_Init( void )
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{
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/*##-1- Configure the SPI peripheral */
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/* Set the SPI parameters */
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hspi.Instance = SPI1;
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hspi.Init.BaudRatePrescaler = SpiFrequency( 10000000 );
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hspi.Init.Direction = SPI_DIRECTION_2LINES;
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hspi.Init.Mode = SPI_MODE_MASTER;
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hspi.Init.CLKPolarity = SPI_POLARITY_LOW;
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hspi.Init.CLKPhase = SPI_PHASE_1EDGE;
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hspi.Init.DataSize = SPI_DATASIZE_8BIT;
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hspi.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
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hspi.Init.FirstBit = SPI_FIRSTBIT_MSB;
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hspi.Init.NSS = SPI_NSS_SOFT;
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hspi.Init.TIMode = SPI_TIMODE_DISABLE;
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hspi.Init.CRCPolynomial = 0;
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SPI_CLK_ENABLE();
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if(HAL_SPI_Init( &hspi) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/*##-2- Configure the SPI GPIOs */
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HW_SPI_IoInit( );
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}
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/*!
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* @brief De-initializes the SPI object and MCU peripheral
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*
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* @param [IN] none
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*/
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void HW_SPI_DeInit( void )
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{
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HAL_SPI_DeInit( &hspi);
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/*##-1- Reset peripherals ####*/
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__HAL_RCC_SPI1_FORCE_RESET();
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__HAL_RCC_SPI1_RELEASE_RESET();
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/*##-2- Configure the SPI GPIOs */
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HW_SPI_IoDeInit( );
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}
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void HW_SPI_IoInit( void )
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{
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GPIO_InitTypeDef initStruct={0};
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initStruct.Mode =GPIO_MODE_AF_PP;
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initStruct.Pull = GPIO_PULLDOWN;
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initStruct.Speed = GPIO_SPEED_HIGH;
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initStruct.Alternate= SPI1_AF ;
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HW_GPIO_Init( RADIO_SCLK_PORT, RADIO_SCLK_PIN, &initStruct);
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HW_GPIO_Init( RADIO_MISO_PORT, RADIO_MISO_PIN, &initStruct);
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HW_GPIO_Init( RADIO_MOSI_PORT, RADIO_MOSI_PIN, &initStruct);
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initStruct.Mode = GPIO_MODE_OUTPUT_PP;
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initStruct.Pull = GPIO_PULLUP;
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HW_GPIO_Init( RADIO_NSS_PORT, RADIO_NSS_PIN, &initStruct );
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HW_GPIO_Write ( RADIO_NSS_PORT, RADIO_NSS_PIN, 1 );
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}
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void HW_SPI_IoDeInit( void )
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{
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GPIO_InitTypeDef initStruct={0};
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initStruct.Mode =GPIO_MODE_OUTPUT_PP;
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initStruct.Pull =GPIO_PULLDOWN ;
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HW_GPIO_Init ( RADIO_MOSI_PORT, RADIO_MOSI_PIN, &initStruct );
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HW_GPIO_Write( RADIO_MOSI_PORT, RADIO_MOSI_PIN, 0 );
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initStruct.Pull =GPIO_PULLDOWN;
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HW_GPIO_Init ( RADIO_MISO_PORT, RADIO_MISO_PIN, &initStruct );
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HW_GPIO_Write( RADIO_MISO_PORT, RADIO_MISO_PIN, 0 );
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initStruct.Pull =GPIO_PULLDOWN ;
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HW_GPIO_Init ( RADIO_SCLK_PORT, RADIO_SCLK_PIN, &initStruct );
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HW_GPIO_Write( RADIO_SCLK_PORT, RADIO_SCLK_PIN, 0 );
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initStruct.Pull = GPIO_PULLUP;
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HW_GPIO_Init ( RADIO_NSS_PORT, RADIO_NSS_PIN , &initStruct );
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HW_GPIO_Write( RADIO_NSS_PORT, RADIO_NSS_PIN , 1 );
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}
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/*!
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* @brief Sends outData and receives inData
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*
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* @param [IN] outData Byte to be sent
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* @retval inData Received byte.
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*/
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uint16_t HW_SPI_InOut( uint16_t txData )
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{
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uint16_t rxData ;
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HAL_SPI_TransmitReceive( &hspi, ( uint8_t * ) &txData, ( uint8_t* ) &rxData, 1, HAL_MAX_DELAY);
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return rxData;
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}
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/* Private functions ---------------------------------------------------------*/
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static uint32_t SpiFrequency( uint32_t hz )
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{
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uint32_t divisor = 0;
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uint32_t SysClkTmp = SystemCoreClock;
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uint32_t baudRate;
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while( SysClkTmp > hz)
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{
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divisor++;
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SysClkTmp= ( SysClkTmp >> 1);
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if (divisor >= 7)
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break;
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}
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baudRate =((( divisor & 0x4 ) == 0 )? 0x0 : SPI_CR1_BR_2 )|
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((( divisor & 0x2 ) == 0 )? 0x0 : SPI_CR1_BR_1 )|
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((( divisor & 0x1 ) == 0 )? 0x0 : SPI_CR1_BR_0 );
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return baudRate;
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}
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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