B3M38SPD seminar project - beehive monitor with LoRa reporting
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spd-lorabees/Src/hw_spi.c

224 lines
7.2 KiB

7 years ago
/*
/ _____) _ | |
( (____ _____ ____ _| |_ _____ ____| |__
\____ \| ___ | (_ _) ___ |/ ___) _ \
_____) ) ____| | | || |_| ____( (___| | | |
(______/|_____)_|_|_| \__)_____)\____)_| |_|
(C)2013 Semtech
Description: Bleeper board SPI driver implementation
License: Revised BSD License, see LICENSE.TXT file include in the project
Maintainer: Miguel Luis and Gregory Cristian
*/
/*******************************************************************************
* @file hw_spi.c
* @author MCD Application Team
* @version V1.1.2
* @date 08-September-2017
* @brief manages the SPI interface
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) 2017 STMicroelectronics International N.V.
* All rights reserved.</center></h2>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted, provided that the following conditions are met:
*
* 1. Redistribution 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 other
* contributors to this software may be used to endorse or promote products
* derived from this software without specific written permission.
* 4. This software, including modifications and/or derivative works of this
* software, must execute solely and exclusively on microcontroller or
* microprocessor devices manufactured by or for STMicroelectronics.
* 5. Redistribution and use of this software other than as permitted under
* this license is void and will automatically terminate your rights under
* this license.
*
* THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
* RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT
* SHALL STMICROELECTRONICS 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.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "hw.h"
#include "utilities.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static SPI_HandleTypeDef hspi;
/* Private function prototypes -----------------------------------------------*/
/*!
* @brief Calculates Spi Divisor based on Spi Frequency and Mcu Frequency
*
* @param [IN] Spi Frequency
* @retval Spi divisor
*/
static uint32_t SpiFrequency( uint32_t hz );
/* Exported functions ---------------------------------------------------------*/
/*!
* @brief Initializes the SPI object and MCU peripheral
*
* @param [IN] none
*/
void HW_SPI_Init( void )
{
/*##-1- Configure the SPI peripheral */
/* Set the SPI parameters */
hspi.Instance = SPI1;
hspi.Init.BaudRatePrescaler = SpiFrequency( 10000000 );
hspi.Init.Direction = SPI_DIRECTION_2LINES;
hspi.Init.Mode = SPI_MODE_MASTER;
hspi.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi.Init.DataSize = SPI_DATASIZE_8BIT;
hspi.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi.Init.NSS = SPI_NSS_SOFT;
hspi.Init.TIMode = SPI_TIMODE_DISABLE;
SPI_CLK_ENABLE();
if(HAL_SPI_Init( &hspi) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the SPI GPIOs */
HW_SPI_IoInit( );
}
/*!
* @brief De-initializes the SPI object and MCU peripheral
*
* @param [IN] none
*/
void HW_SPI_DeInit( void )
{
HAL_SPI_DeInit( &hspi);
/*##-1- Reset peripherals ####*/
__HAL_RCC_SPI1_FORCE_RESET();
__HAL_RCC_SPI1_RELEASE_RESET();
/*##-2- Configure the SPI GPIOs */
HW_SPI_IoDeInit( );
}
void HW_SPI_IoInit( void )
{
GPIO_InitTypeDef initStruct={0};
initStruct.Mode =GPIO_MODE_AF_PP;
initStruct.Pull = GPIO_PULLDOWN;
initStruct.Speed = GPIO_SPEED_HIGH;
initStruct.Alternate= SPI1_AF ;
HW_GPIO_Init( RADIO_SCLK_PORT, RADIO_SCLK_PIN, &initStruct);
HW_GPIO_Init( RADIO_MISO_PORT, RADIO_MISO_PIN, &initStruct);
HW_GPIO_Init( RADIO_MOSI_PORT, RADIO_MOSI_PIN, &initStruct);
initStruct.Mode = GPIO_MODE_OUTPUT_PP;
initStruct.Pull = GPIO_PULLUP;
HW_GPIO_Init( RADIO_NSS_PORT, RADIO_NSS_PIN, &initStruct );
HW_GPIO_Write ( RADIO_NSS_PORT, RADIO_NSS_PIN, 1 );
}
void HW_SPI_IoDeInit( void )
{
GPIO_InitTypeDef initStruct={0};
initStruct.Mode =GPIO_MODE_OUTPUT_PP;
initStruct.Pull =GPIO_PULLDOWN ;
HW_GPIO_Init ( RADIO_MOSI_PORT, RADIO_MOSI_PIN, &initStruct );
HW_GPIO_Write( RADIO_MOSI_PORT, RADIO_MOSI_PIN, 0 );
initStruct.Pull =GPIO_PULLDOWN;
HW_GPIO_Init ( RADIO_MISO_PORT, RADIO_MISO_PIN, &initStruct );
HW_GPIO_Write( RADIO_MISO_PORT, RADIO_MISO_PIN, 0 );
initStruct.Pull =GPIO_PULLDOWN ;
HW_GPIO_Init ( RADIO_SCLK_PORT, RADIO_SCLK_PIN, &initStruct );
HW_GPIO_Write( RADIO_SCLK_PORT, RADIO_SCLK_PIN, 0 );
initStruct.Pull = GPIO_PULLUP;
HW_GPIO_Init ( RADIO_NSS_PORT, RADIO_NSS_PIN , &initStruct );
HW_GPIO_Write( RADIO_NSS_PORT, RADIO_NSS_PIN , 1 );
}
/*!
* @brief Sends outData and receives inData
*
* @param [IN] outData Byte to be sent
* @retval inData Received byte.
*/
uint16_t HW_SPI_InOut( uint16_t txData )
{
uint16_t rxData ;
HAL_SPI_TransmitReceive( &hspi, ( uint8_t * ) &txData, ( uint8_t* ) &rxData, 1, HAL_MAX_DELAY);
return rxData;
}
/* Private functions ---------------------------------------------------------*/
static uint32_t SpiFrequency( uint32_t hz )
{
uint32_t divisor = 0;
uint32_t SysClkTmp = SystemCoreClock;
uint32_t baudRate;
while( SysClkTmp > hz)
{
divisor++;
SysClkTmp= ( SysClkTmp >> 1);
if (divisor >= 7)
break;
}
baudRate =((( divisor & 0x4 ) == 0 )? 0x0 : SPI_CR1_BR_2 )|
((( divisor & 0x2 ) == 0 )? 0x0 : SPI_CR1_BR_1 )|
((( divisor & 0x1 ) == 0 )? 0x0 : SPI_CR1_BR_0 );
return baudRate;
}
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/