File content as of revision 1:fb307cfca15c:

/**
******************************************************************************
* File Name          : bluenrg_shield_bsp.c
* Date               : 16/05/2014
* Description        : This file provides code for the BlueNRG Shield driver
*                      based on STM32Cube HAL for STM32 Nucleo boards.
******************************************************************************
*
* COPYRIGHT(c) 2014 STMicroelectronics
*
* 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.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "bluenrg_shield_bsp.h"
#include "cube_hal.h"
#include "hci.h"

/** @addtogroup BlueNRG_Shield
 *  @{
 */

/** @defgroup BlueNRG_Shield_Driver
 *  @brief BlueNRG Shield driver based on STM32Cube HAL for STM32 Nucleo boards.
 *  @{
 */


/* SPI handler declared in "main.c" file */
extern SPI_HandleTypeDef SpiHandle;


/**
 * @brief  This function is used for low level initialization of the SPI
 *         communication with the BlueNRG Shield.
 * @param  hspi: handle of the STM32Cube HAL SPI interface
 * @retval None
 */
void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{
    GPIO_InitTypeDef GPIO_InitStruct;
    if(hspi->Instance==BNRG_SPI_INSTANCE) {
        /* Enable peripherals clock */

        /* Enable GPIO Ports Clock */
        BNRG_SPI_RESET_CLK_ENABLE();
        BNRG_SPI_SCLK_CLK_ENABLE();
        BNRG_SPI_MISO_CLK_ENABLE();
        BNRG_SPI_MOSI_CLK_ENABLE();
        BNRG_SPI_CS_CLK_ENABLE();
        BNRG_SPI_IRQ_CLK_ENABLE();

        /* Enable SPI clock */
        BNRG_SPI_CLK_ENABLE();

        /* Reset */
        GPIO_InitStruct.Pin = BNRG_SPI_RESET_PIN;
        GPIO_InitStruct.Mode = BNRG_SPI_RESET_MODE;
        GPIO_InitStruct.Pull = BNRG_SPI_RESET_PULL;
        GPIO_InitStruct.Speed = BNRG_SPI_RESET_SPEED;
        GPIO_InitStruct.Alternate = BNRG_SPI_RESET_ALTERNATE;
        HAL_GPIO_Init(BNRG_SPI_RESET_PORT, &GPIO_InitStruct);
        HAL_GPIO_WritePin(BNRG_SPI_RESET_PORT, BNRG_SPI_RESET_PIN, GPIO_PIN_RESET);	/*Added to avoid spurious interrupt from the BlueNRG */

        /* SCLK */
        GPIO_InitStruct.Pin = BNRG_SPI_SCLK_PIN;
        GPIO_InitStruct.Mode = BNRG_SPI_SCLK_MODE;
        GPIO_InitStruct.Pull = BNRG_SPI_SCLK_PULL;
        GPIO_InitStruct.Speed = BNRG_SPI_SCLK_SPEED;
        GPIO_InitStruct.Alternate = BNRG_SPI_SCLK_ALTERNATE;
        HAL_GPIO_Init(BNRG_SPI_SCLK_PORT, &GPIO_InitStruct);

        /* MISO */
        GPIO_InitStruct.Pin = BNRG_SPI_MISO_PIN;
        GPIO_InitStruct.Mode = BNRG_SPI_MISO_MODE;
        GPIO_InitStruct.Pull = BNRG_SPI_MISO_PULL;
        GPIO_InitStruct.Speed = BNRG_SPI_MISO_SPEED;
        GPIO_InitStruct.Alternate = BNRG_SPI_MISO_ALTERNATE;
        HAL_GPIO_Init(BNRG_SPI_MISO_PORT, &GPIO_InitStruct);

        /* MOSI */
        GPIO_InitStruct.Pin = BNRG_SPI_MOSI_PIN;
        GPIO_InitStruct.Mode = BNRG_SPI_MOSI_MODE;
        GPIO_InitStruct.Pull = BNRG_SPI_MOSI_PULL;
        GPIO_InitStruct.Speed = BNRG_SPI_MOSI_SPEED;
        GPIO_InitStruct.Alternate = BNRG_SPI_MOSI_ALTERNATE;
        HAL_GPIO_Init(BNRG_SPI_MOSI_PORT, &GPIO_InitStruct);

        /* NSS/CSN/CS */
        GPIO_InitStruct.Pin = BNRG_SPI_CS_PIN;
        GPIO_InitStruct.Mode = BNRG_SPI_CS_MODE;
        GPIO_InitStruct.Pull = BNRG_SPI_CS_PULL;
        GPIO_InitStruct.Speed = BNRG_SPI_CS_SPEED;
        GPIO_InitStruct.Alternate = BNRG_SPI_CS_ALTERNATE;
        HAL_GPIO_Init(BNRG_SPI_CS_PORT, &GPIO_InitStruct);
        HAL_GPIO_WritePin(BNRG_SPI_CS_PORT, BNRG_SPI_CS_PIN, GPIO_PIN_SET);

        /* IRQ -- INPUT */
        GPIO_InitStruct.Pin = BNRG_SPI_IRQ_PIN;
        GPIO_InitStruct.Mode = BNRG_SPI_IRQ_MODE;
        GPIO_InitStruct.Pull = BNRG_SPI_IRQ_PULL;
        GPIO_InitStruct.Speed = BNRG_SPI_IRQ_SPEED;
        GPIO_InitStruct.Alternate = BNRG_SPI_IRQ_ALTERNATE;
        HAL_GPIO_Init(BNRG_SPI_IRQ_PORT, &GPIO_InitStruct);

        /* Configure the NVIC for SPI */
        HAL_NVIC_SetPriority(BNRG_SPI_EXTI_IRQn, 4, 0);
        HAL_NVIC_EnableIRQ(BNRG_SPI_EXTI_IRQn);
    }
}

/**
 * @brief EXTI line detection callback.
 * @param GPIO_Pin: Specifies the pins connected EXTI line
 * @retval None
 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
    tHciDataPacket * hciReadPacket;// = NULL;
    uint8_t data_len;
    /*
     * No need to call Clear_SPI_EXTI_Flag() here as
     * HAL_GPIO_EXTI_IRQHandler() already does it
     */

    if(GPIO_Pin == BNRG_SPI_EXTI_PIN) {

        while (HAL_GPIO_ReadPin(BNRG_SPI_EXTI_PORT, BNRG_SPI_EXTI_PIN) == GPIO_PIN_SET) {
            if (list_is_empty (&hciReadPktPool) == FALSE) {
                /* enqueueing a packet for read */
                list_remove_head (&hciReadPktPool, (tListNode **)&hciReadPacket);
                data_len = BlueNRG_SPI_Read_All(&SpiHandle, hciReadPacket->dataBuff, HCI_PACKET_SIZE);

                if(data_len > 0) {
                    /* Packet will be inserted to the correct queue */
                    HCI_Input(hciReadPacket);
                } else {
                    /* Insert the packet back into the pool */
                    list_insert_head(&hciReadPktPool, (tListNode *)hciReadPacket);
                }

            } else {
                /* TODO: HCI Read Packet Pool is empty, wait for a free packet */
            }

            Clear_SPI_EXTI_Flag();
        }
    }
}


/**
* @brief  This function is used to initialize the SPI communication with
*         the BlueNRG Shield.
* @param  None
* @retval None
*/
void BNRG_SPI_Init(void)
{
    SpiHandle.Instance = BNRG_SPI_INSTANCE;
    SpiHandle.Init.Mode = BNRG_SPI_MODE;
    SpiHandle.Init.Direction = BNRG_SPI_DIRECTION;
    SpiHandle.Init.DataSize = BNRG_SPI_DATASIZE;
    SpiHandle.Init.CLKPolarity = BNRG_SPI_CLKPOLARITY;
    SpiHandle.Init.CLKPhase = BNRG_SPI_CLKPHASE;
    SpiHandle.Init.NSS = BNRG_SPI_NSS;
    SpiHandle.Init.FirstBit = BNRG_SPI_FIRSTBIT;
    SpiHandle.Init.TIMode = BNRG_SPI_TIMODE;
    SpiHandle.Init.CRCPolynomial = BNRG_SPI_CRCPOLYNOMIAL;
    SpiHandle.Init.BaudRatePrescaler = BNRG_SPI_BAUDRATEPRESCALER;
    SpiHandle.Init.CRCCalculation = BNRG_SPI_CRCCALCULATION;

    HAL_SPI_Init(&SpiHandle);
}

/**
* @brief  Read from BlueNRG SPI buffer and store data into local buffer
* @param  hspi:      handle of the STM32Cube HAL SPI interface
* @param  buffer:    buffer where data from SPI are stored
* @param  buff_size: buffer size
* @retval number of read bytes
*/
int32_t BlueNRG_SPI_Read_All(SPI_HandleTypeDef *hspi, uint8_t *buffer, uint8_t buff_size)
{
    uint16_t byte_count;
    uint8_t len = 0;
    uint8_t i = 0;
    uint8_t char_ff = 0xff;
    volatile uint8_t read_char;

    uint8_t header_master[5] = {0x0b, 0x00, 0x00, 0x00, 0x00};
    uint8_t header_slave[5];

    /* CS reset */
    HAL_GPIO_WritePin(BNRG_SPI_CS_PORT, BNRG_SPI_CS_PIN, GPIO_PIN_RESET);

    /* Read the header */
    for (i = 0; i < 5; i++) {
        HAL_SPI_TransmitReceive(hspi, &header_master[i], &header_slave[i], 1, 15);
    }


    if (header_slave[0] == 0x02) {
        /* device is ready */
        byte_count = (header_slave[4]<<8)|header_slave[3];

        if (byte_count > 0) {

            /* avoid to read more data that size of the buffer */
            if (byte_count > buff_size) {
                byte_count = buff_size;
            }

            for (len = 0; len < byte_count; len++) {
                HAL_SPI_TransmitReceive(hspi, &char_ff, (uint8_t*)&read_char, 1, 15);
                buffer[len] = read_char;
            }
        }
    }
    /* Release CS line */
    HAL_GPIO_WritePin(BNRG_SPI_CS_PORT, BNRG_SPI_CS_PIN, GPIO_PIN_SET);

    return len;
}

/**
* @brief  Write data from local buffer to SPI
* @param  hspi:      handle of the STM32Cube HAL SPI interface
* @param  data1:     first data buffer to be written
* @param  data2:     second data buffer to be written
* @param  Nb_bytes1: size of first data buffer to be written
* @param  Nb_bytes2: size of second data buffer to be written
* @retval number of read bytes
*/
int32_t BlueNRG_SPI_Write(SPI_HandleTypeDef *hspi, uint8_t* data1, uint8_t* data2, uint8_t Nb_bytes1, uint8_t Nb_bytes2)
{
    uint32_t i;
    uint8_t read_char;
    int32_t result = 0;

    unsigned char header_master[5] = {0x0a, 0x00, 0x00, 0x00, 0x00};
    unsigned char header_slave[5]  = {0xaa, 0x00, 0x00, 0x00, 0x00};

    Disable_SPI_IRQ();

    /* CS reset */
    HAL_GPIO_WritePin(BNRG_SPI_CS_PORT, BNRG_SPI_CS_PIN, GPIO_PIN_RESET);

    /* Exchange header */


    for (i = 0; i < 5; i++) {
        HAL_SPI_TransmitReceive(hspi, &header_master[i], &header_slave[i], 1, 15);
    }


    if (header_slave[0] == 0x02) {
        /* SPI is ready */
        if (header_slave[1] >= (Nb_bytes1+Nb_bytes2)) {
            /*  Buffer is big enough */
            for (i = 0; i < Nb_bytes1; i++) {
                HAL_SPI_TransmitReceive(hspi, (data1 + i), &read_char, 1, 15);
            }
            for (i = 0; i < Nb_bytes2; i++) {
                HAL_SPI_TransmitReceive(hspi, (data2 + i), &read_char, 1, 15);
            }
        } else {
            /* Buffer is too small */
            result = -2;
        }
    } else {
        /* SPI is not ready */
        result = -1;
    }

    /* Release CS line */
    HAL_GPIO_WritePin(BNRG_SPI_CS_PORT, BNRG_SPI_CS_PIN, GPIO_PIN_SET);

    Enable_SPI_IRQ();

    return result;
}

/**
 * Writes data to a serial interface.
 *
 * @param  data1    1st buffer
 * @param  data2    2nd buffer
 * @param  n_bytes1 number of bytes in 1st buffer
 * @param  n_bytes2 number of bytes in 2nd buffer
 */
void Hal_Write_Serial(const void* data1, const void* data2, tHalInt32 n_bytes1, tHalInt32 n_bytes2)
{
    struct timer t;

    Timer_Set(&t, CLOCK_SECOND/10);

    while(1) {
        if(BlueNRG_SPI_Write(&SpiHandle, (uint8_t *)data1,(uint8_t *)data2, n_bytes1, n_bytes2)==0) break;
        if(Timer_Expired(&t)) {
            break;
        }
    }
}

/**
 * @brief  Disable SPI IRQ
 * @param  None
 * @retval None
 */
void Disable_SPI_IRQ(void)
{
    HAL_NVIC_DisableIRQ(BNRG_SPI_EXTI_IRQn);
}

/**
 * @brief  Enable SPI IRQ
 * @param  None
 * @retval None
 */
void Enable_SPI_IRQ(void)
{
    HAL_NVIC_EnableIRQ(BNRG_SPI_EXTI_IRQn);
}

/**
 * @brief  Clear Pending SPI IRQ
 * @param  None
 * @retval None
 */
void Clear_SPI_IRQ(void)
{
    HAL_NVIC_ClearPendingIRQ(BNRG_SPI_EXTI_IRQn);
}

/**
 * @brief  Clear EXTI (External Interrupt) line for SPI IRQ
 * @param  None
 * @retval None
 */
void Clear_SPI_EXTI_Flag(void)
{
    __HAL_GPIO_EXTI_CLEAR_IT(BNRG_SPI_EXTI_PIN);
}

/**
 * @brief  Reset the BlueNRG
 * @param  None
 * @retval None
 */
void BlueNRG_RST(void)
{
    HAL_GPIO_WritePin(BNRG_SPI_RESET_PORT, BNRG_SPI_RESET_PIN, GPIO_PIN_RESET);
    HAL_Delay(5);
    HAL_GPIO_WritePin(BNRG_SPI_RESET_PORT, BNRG_SPI_RESET_PIN, GPIO_PIN_SET);
    HAL_Delay(5);
}

/**
 * @}
 */

/**
 * @}
 */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/