Prototype RF driver for STM Sub-1 GHz RF expansion board based on the SPSGRF-868 module for STM32 Nucleo.
Prototype RF Driver for STM Sub-1 GHz RF Expansion Boards based on the SPSGRF-868 and SPSGRF-915 Modules for STM32 Nucleo
Currently supported boards:
Note, in order to use expansion board X-NUCLEO-IDS01A4 in mbed you need to perform the following HW modifications on the board:
- Unmount resistor
R4 - Mount resistor
R7
Furthermore, on some Nucleo development boards (e.g. the NUCLEO_F429ZI), in order to be able to use Ethernet together with these Sub-1 GHz RF expansion boards, you need to compile this driver with macro SPIRIT1_SPI_MOSI=PB_5 defined, while the development board typically requires some HW modification as e.g. described here!
This driver can be used together with the 6LoWPAN stack (a.k.a. Nanostack).
Diff: source/libs/spirit1/SPIRIT1_Library/Src/SPIRIT_PktBasic.c
- Revision:
- 34:edda6a7238ec
- Child:
- 67:93bec0baf1de
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/source/libs/spirit1/SPIRIT1_Library/Src/SPIRIT_PktBasic.c Tue Nov 22 11:40:10 2016 +0100
@@ -0,0 +1,615 @@
+/**
+ ******************************************************************************
+ * @file SPIRIT_PktBasic.c
+ * @author VMA division - AMS
+ * @version 3.2.2
+ * @date 08-July-2015
+ * @brief Configuration and management of SPIRIT Basic packets.
+ * @details
+ *
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+ *
+ * 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 "SPIRIT_PktBasic.h"
+#include "MCU_Interface.h"
+
+
+/**
+ * @addtogroup SPIRIT_Libraries
+ * @{
+ */
+
+
+/**
+ * @addtogroup SPIRIT_PktBasic
+ * @{
+ */
+
+
+/**
+ * @defgroup PktBasic_Private_TypesDefinitions Pkt Basic Private Types Definitions
+ * @{
+ */
+
+/**
+ *@}
+ */
+
+
+/**
+ * @defgroup PktBasic_Private_Defines Pkt Basic Private Defines
+ * @{
+ */
+
+/**
+ *@}
+ */
+
+
+/**
+ * @defgroup PktBasic_Private_Macros Pkt Basic Private Macros
+ * @{
+ */
+
+/**
+ *@}
+ */
+
+
+/**
+ * @defgroup PktBasic_Private_Variables Pkt Basic Private Variables
+ * @{
+ */
+
+/**
+ *@}
+ */
+
+
+
+/**
+ * @defgroup PktBasic_Private_FunctionPrototypes Pkt Basic Private Function Prototypes
+ * @{
+ */
+
+/**
+ *@}
+ */
+
+
+/**
+ * @defgroup PktBasic_Private_Functions Pkt Basic Private Functions
+ * @{
+ */
+
+/**
+ * @brief Initializes the SPIRIT Basic packet according to the specified parameters in the PktBasicInit struct.
+ * Notice that this function sets the autofiltering option on CRC if it is set to any value different from BASIC_NO_CRC.
+ * @param pxPktBasicInit Basic packet init structure.
+ * This parameter is a pointer to @ref PktBasicInit.
+ * @retval None.
+ */
+void SpiritPktBasicInit(PktBasicInit* pxPktBasicInit)
+{
+ uint8_t tempRegValue[4], i;
+
+ /* Check the parameters */
+ s_assert_param(IS_BASIC_PREAMBLE_LENGTH(pxPktBasicInit->xPreambleLength));
+ s_assert_param(IS_BASIC_SYNC_LENGTH(pxPktBasicInit->xSyncLength));
+ s_assert_param(IS_BASIC_CRC_MODE(pxPktBasicInit->xCrcMode));
+ s_assert_param(IS_BASIC_LENGTH_WIDTH_BITS(pxPktBasicInit->cPktLengthWidth));
+ s_assert_param(IS_BASIC_FIX_VAR_LENGTH(pxPktBasicInit->xFixVarLength));
+ s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(pxPktBasicInit->xAddressField));
+ s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(pxPktBasicInit->xFec));
+ s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(pxPktBasicInit->xDataWhitening));
+ s_assert_param(IS_BASIC_CONTROL_LENGTH(pxPktBasicInit->xControlLength));
+
+ /* Reads the PROTOCOL1 register */
+ g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue[0]);
+
+ /* Mask a reserved bit */
+ tempRegValue[0] &= ~0x20;
+
+ /* Always set the automatic packet filtering */
+ tempRegValue[0] |= PROTOCOL1_AUTO_PCKT_FLT_MASK;
+
+ /* Writes the value on register */
+ g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue[0]);
+
+ /* Reads the PCKT_FLT_OPTIONS register */
+ g_xStatus = SpiritSpiReadRegisters(PCKT_FLT_OPTIONS_BASE, 1, &tempRegValue[0]);
+
+ /* Always reset the control and source filtering (also if it is not present in basic) */
+ tempRegValue[0] &= ~(PCKT_FLT_OPTIONS_SOURCE_FILTERING_MASK | PCKT_FLT_OPTIONS_CONTROL_FILTERING_MASK);
+
+ /* Writes the value on register */
+ g_xStatus = SpiritSpiWriteRegisters(PCKT_FLT_OPTIONS_BASE, 1, &tempRegValue[0]);
+
+ if(pxPktBasicInit->xAddressField == S_ENABLE)
+ {
+ tempRegValue[0]=0x08;
+ }
+ else
+ {
+ tempRegValue[0]=0x00;
+ }
+ /* Address and control length setting */
+ tempRegValue[0] |= ((uint8_t) pxPktBasicInit->xControlLength);
+
+ /* Packet format and width length setting */
+ pxPktBasicInit->cPktLengthWidth == 0 ? pxPktBasicInit->cPktLengthWidth=1 : pxPktBasicInit->cPktLengthWidth;
+ tempRegValue[1] = ((uint8_t) PCKTCTRL3_PCKT_FRMT_BASIC) | ((uint8_t)(pxPktBasicInit->cPktLengthWidth-1));
+
+ /* Preamble, sync and fixed or variable length setting */
+ tempRegValue[2] = ((uint8_t) pxPktBasicInit->xPreambleLength) | ((uint8_t) pxPktBasicInit->xSyncLength) |
+ ((uint8_t) pxPktBasicInit->xFixVarLength);
+
+ /* CRC length, whitening and FEC setting */
+ tempRegValue[3] = (uint8_t) pxPktBasicInit->xCrcMode;
+
+ if(pxPktBasicInit->xDataWhitening == S_ENABLE)
+ {
+ tempRegValue[3] |= PCKTCTRL1_WHIT_MASK;
+ }
+
+ if(pxPktBasicInit->xFec == S_ENABLE)
+ {
+ tempRegValue[3] |= PCKTCTRL1_FEC_MASK;
+ }
+
+ /* Writes registers */
+ SpiritSpiWriteRegisters(PCKTCTRL4_BASE, 4, tempRegValue);
+
+ /* Sync words setting */
+ for(i=0;i<4;i++)
+ {
+ if(i<3-(pxPktBasicInit->xSyncLength >>1))
+ {
+ tempRegValue[i]=0;
+ }
+ else
+ {
+ tempRegValue[i] = (uint8_t)(pxPktBasicInit->lSyncWords>>(8*i));
+ }
+ }
+
+ /* Sets CRC check bit */
+ if(pxPktBasicInit->xCrcMode == PKT_NO_CRC)
+ {
+ SpiritPktBasicFilterOnCrc(S_DISABLE);
+ }
+ else
+ {
+ SpiritPktBasicFilterOnCrc(S_ENABLE);
+ }
+
+
+ g_xStatus = SpiritSpiWriteRegisters(SYNC4_BASE, 4, tempRegValue);
+
+}
+
+
+/**
+ * @brief Returns the SPIRIT Basic packet structure according to the specified parameters in the registers.
+ * @param pxPktBasicInit Basic packet init structure.
+ * This parameter is a pointer to @ref PktBasicInit.
+ * @retval None.
+ */
+void SpiritPktBasicGetInfo(PktBasicInit* pxPktBasicInit)
+{
+ uint8_t tempRegValue[10];
+
+ /* Reads registers */
+ g_xStatus = SpiritSpiReadRegisters(PCKTCTRL4_BASE, 10, tempRegValue);
+
+ /* Length width */
+ pxPktBasicInit->cPktLengthWidth=(tempRegValue[1] & 0x0F)+1;
+
+ /* Address field */
+ pxPktBasicInit->xAddressField=(SpiritFunctionalState)((tempRegValue[0]>>3) & 0x01);
+
+ /* Control length */
+ pxPktBasicInit->xControlLength=(BasicControlLength)(tempRegValue[0] & 0x07);
+
+ /* CRC mode */
+ pxPktBasicInit->xCrcMode=(BasicCrcMode)(tempRegValue[3] & 0xE0);
+
+ /* Whitening */
+ pxPktBasicInit->xDataWhitening=(SpiritFunctionalState)((tempRegValue[3] >> 4) & 0x01);
+
+ /* FEC */
+ pxPktBasicInit->xFec=(SpiritFunctionalState)(tempRegValue[3] & 0x01);
+
+ /* FIX or VAR bit */
+ pxPktBasicInit->xFixVarLength=(BasicFixVarLength)(tempRegValue[2] & 0x01);
+
+ /* Preamble length */
+ pxPktBasicInit->xPreambleLength=(BasicPreambleLength)(tempRegValue[2] & 0xF8);
+
+ /* Sync length */
+ pxPktBasicInit->xSyncLength=(BasicSyncLength)(tempRegValue[2] & 0x06);
+
+ /* sync Words */
+ pxPktBasicInit->lSyncWords=0;
+ for(uint8_t i=0 ; i<4 ; i++)
+ {
+ if(i>2-(((uint8_t)pxPktBasicInit->xSyncLength) >>1))
+ {
+ pxPktBasicInit->lSyncWords |= (uint32_t)(tempRegValue[i+6])<<(8*i);
+ }
+ }
+
+}
+
+
+/**
+ * @brief Initializes the SPIRIT Basic packet addresses according to the specified
+ * parameters in the PktBasicAddressesInit struct.
+ * @param pxPktBasicAddresses Basic packet addresses init structure.
+ * This parameter is a pointer to @ref PktBasicAddresses.
+ * @retval None.
+ */
+void SpiritPktBasicAddressesInit(PktBasicAddressesInit* pxPktBasicAddresses)
+{
+ uint8_t tempRegValue[3];
+
+ /* Check the parameters */
+ s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(pxPktBasicAddresses->xFilterOnMyAddress));
+ s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(pxPktBasicAddresses->xFilterOnMulticastAddress));
+ s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(pxPktBasicAddresses->xFilterOnBroadcastAddress));
+
+
+ /* Reads the PCKT_FLT_OPTIONS ragister */
+ g_xStatus = SpiritSpiReadRegisters(PCKT_FLT_OPTIONS_BASE, 1, &tempRegValue[0]);
+
+ /* Enables or disables filtering on my address */
+ if(pxPktBasicAddresses->xFilterOnMyAddress == S_ENABLE)
+ {
+ tempRegValue[0] |= PCKT_FLT_OPTIONS_DEST_VS_TX_ADDR_MASK;
+ }
+ else
+ {
+ tempRegValue[0] &= ~PCKT_FLT_OPTIONS_DEST_VS_TX_ADDR_MASK;
+ }
+
+ /* Enables or disables filtering on multicast address */
+ if(pxPktBasicAddresses->xFilterOnMulticastAddress == S_ENABLE)
+ {
+ tempRegValue[0] |= PCKT_FLT_OPTIONS_DEST_VS_MULTICAST_ADDR_MASK;
+ }
+ else
+ {
+ tempRegValue[0] &= ~PCKT_FLT_OPTIONS_DEST_VS_MULTICAST_ADDR_MASK;
+ }
+
+ /* Enables or disables filtering on broadcast address */
+ if(pxPktBasicAddresses->xFilterOnBroadcastAddress == S_ENABLE)
+ {
+ tempRegValue[0] |= PCKT_FLT_OPTIONS_DEST_VS_BROADCAST_ADDR_MASK;
+ }
+ else
+ {
+ tempRegValue[0] &= ~PCKT_FLT_OPTIONS_DEST_VS_BROADCAST_ADDR_MASK;
+ }
+
+ /* Writes the new value on the PCKT_FLT_OPTIONS register */
+ g_xStatus = SpiritSpiWriteRegisters(PCKT_FLT_OPTIONS_BASE, 1, &tempRegValue[0]);
+
+ /* Fills the array with the addresses passed in the structure */
+ tempRegValue[0] = pxPktBasicAddresses->cBroadcastAddress;
+ tempRegValue[1] = pxPktBasicAddresses->cMulticastAddress;
+ tempRegValue[2] = pxPktBasicAddresses->cMyAddress;
+
+ /* Writes values on the PCKT_FLT_GOALS registers */
+ g_xStatus = SpiritSpiWriteRegisters(PCKT_FLT_GOALS_BROADCAST_BASE, 3, tempRegValue);
+
+
+}
+
+
+/**
+ * @brief Returns the SPIRIT Basic packet addresses structure according to the specified
+ * parameters in the registers.
+ * @param pxPktBasicAddresses Basic packet addresses init structure.
+ * This parameter is a pointer to @ref PktBasicAddresses.
+ * @retval None.
+ */
+void SpiritPktBasicGetAddressesInfo(PktBasicAddressesInit* pxPktBasicAddresses)
+{
+ uint8_t tempRegValue[3];
+
+ /* Reads values on the PCKT_FLT_GOALS registers */
+ g_xStatus = SpiritSpiReadRegisters(PCKT_FLT_GOALS_BROADCAST_BASE, 3, tempRegValue);
+
+ /* Fit the structure with the read addresses */
+ pxPktBasicAddresses->cBroadcastAddress = tempRegValue[0];
+ pxPktBasicAddresses->cMulticastAddress = tempRegValue[1];
+ pxPktBasicAddresses->cMyAddress = tempRegValue[2];
+
+ g_xStatus = SpiritSpiReadRegisters(PCKT_FLT_OPTIONS_BASE, 1, &tempRegValue[0]);
+
+ /* Fit the structure with the read filtering bits */
+ pxPktBasicAddresses->xFilterOnBroadcastAddress = (SpiritFunctionalState)((tempRegValue[0] >> 1) & 0x01);
+ pxPktBasicAddresses->xFilterOnMulticastAddress = (SpiritFunctionalState)((tempRegValue[0] >> 2) & 0x01);
+ pxPktBasicAddresses->xFilterOnMyAddress = (SpiritFunctionalState)((tempRegValue[0] >> 3) & 0x01);
+
+}
+
+
+/**
+ * @brief Configures the Basic packet format as packet used by SPIRIT.
+ * @param None.
+ * @retval None.
+ */
+void SpiritPktBasicSetFormat(void)
+{
+ uint8_t tempRegValue;
+
+ /* Reads the register value */
+ g_xStatus = SpiritSpiReadRegisters(PCKTCTRL3_BASE, 1, &tempRegValue);
+
+ /* Build the new value. Also set to 0 the direct RX mode bits */
+ tempRegValue &= 0x0F;
+ tempRegValue |= (uint8_t)PCKTCTRL3_PCKT_FRMT_BASIC;
+
+ /* Writes the value on the PCKTCTRL3 register */
+ g_xStatus = SpiritSpiWriteRegisters(PCKTCTRL3_BASE, 1, &tempRegValue);
+
+ /* Reads the PCKTCTRL1_BASE register */
+ g_xStatus = SpiritSpiReadRegisters(PCKTCTRL1_BASE, 1, &tempRegValue);
+
+ /* Build the new value. Set to 0 the direct TX mode bits */
+ tempRegValue &= 0xF3;
+
+ /* Writes the value on the PCKTCTRL1 register */
+ g_xStatus = SpiritSpiWriteRegisters(PCKTCTRL1_BASE, 1, &tempRegValue);
+
+ /* Reads the PROTOCOL1 register */
+ g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+
+ /* Mask a reserved bit */
+ tempRegValue &= ~0x20;
+
+ /* Writes the value on register */
+ g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+}
+
+
+/**
+ * @brief Sets the address length for SPIRIT Basic packets.
+ * @param xAddressField length of ADDRESS in bytes.
+ * This parameter can be: S_ENABLE or S_DISABLE.
+ * @retval None.
+ */
+void SpiritPktBasicAddressField(SpiritFunctionalState xAddressField)
+{
+ uint8_t tempRegValue;
+
+ /* Check the parameters */
+ s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(xAddressField));
+
+ /* Reads the PCKTCTRL4 register value */
+ g_xStatus = SpiritSpiReadRegisters(PCKTCTRL4_BASE, 1, &tempRegValue);
+
+ /* Build the address length for the register */
+ if(xAddressField==S_ENABLE)
+ {
+ tempRegValue |= 0x08;
+ }
+ else
+ {
+ tempRegValue &= 0x07;
+ }
+
+ /* Writes the new value on the PCKTCTRL4 register */
+ g_xStatus = SpiritSpiWriteRegisters(PCKTCTRL4_BASE, 1, &tempRegValue);
+
+}
+
+
+/**
+ * @brief Specifies if the Address field for SPIRIT Basic packets is enabled or disabled.
+ * @param None.
+ * @retval SpiritFunctionalState Notifies if the address field is enabled or disabled.
+ */
+SpiritFunctionalState SpiritPktBasicGetAddressField(void)
+{
+ uint8_t tempRegValue;
+
+ /* Reads the PCKTCTRL4 register value */
+ g_xStatus = SpiritSpiReadRegisters(PCKTCTRL4_BASE, 1, &tempRegValue);
+
+ /* Returns the address field value */
+ if(tempRegValue & PCKTCTRL4_ADDRESS_LEN_MASK)
+ {
+ return S_ENABLE;
+ }
+ else
+ {
+ return S_DISABLE;
+ }
+
+}
+
+
+/**
+ * @brief Sets the payload length for SPIRIT Basic packets. Since the packet length
+ * depends from the address and the control field size, this
+ * function reads the correspondent registers in order to determine
+ * the correct packet length to be written.
+ * @param nPayloadLength payload length in bytes.
+ * This parameter is an uint16_t.
+ * @retval None.
+ */
+void SpiritPktBasicSetPayloadLength(uint16_t nPayloadLength)
+{
+ uint8_t tempRegValue[2];
+ uint16_t overSize=0;
+
+ /* Computes the oversize (address + control) size */
+ if(SpiritPktBasicGetAddressField())
+ {
+ overSize=1;
+ }
+ overSize += (uint16_t) SpiritPktBasicGetControlLength();
+
+ /* Computes PCKTLEN0 value from nPayloadLength */
+ tempRegValue[1]=BASIC_BUILD_PCKTLEN0(nPayloadLength+overSize);
+ /* Computes PCKTLEN1 value from nPayloadLength */
+ tempRegValue[0]=BASIC_BUILD_PCKTLEN1(nPayloadLength+overSize);
+
+ /* Writes data on the PCKTLEN1/0 register */
+ g_xStatus = SpiritSpiWriteRegisters(PCKTLEN1_BASE, 2, tempRegValue);
+
+}
+
+
+/**
+ * @brief Returns the payload length for SPIRIT Basic packets. Since the
+ * packet length depends from the address and the control
+ * field size, this function reads the correspondent
+ * registers in order to determine the correct payload length
+ * to be returned.
+ * @param None.
+ * @retval uint16_t Payload length in bytes.
+ */
+uint16_t SpiritPktBasicGetPayloadLength(void)
+{
+ uint8_t tempRegValue[2];
+ uint16_t overSize=0;
+
+ /* Computes the oversize (address + control) size */
+ if(SpiritPktBasicGetAddressField())
+ {
+ overSize=1;
+ }
+ overSize += (uint16_t) SpiritPktBasicGetControlLength();
+
+ /* Reads the packet length registers */
+ g_xStatus = SpiritSpiReadRegisters(PCKTLEN1_BASE, 2, tempRegValue);
+
+ /* Returns the packet length */
+ return ((((uint16_t)tempRegValue[0])<<8) + (uint16_t) tempRegValue[1]) - overSize;
+}
+
+/**
+ * @brief Returns the packet length field of the received packet.
+ * @param None.
+ * @retval uint16_t Packet length.
+ */
+uint16_t SpiritPktBasicGetReceivedPktLength(void)
+{
+ uint8_t tempRegValue[2];
+ uint16_t overSize=0;
+
+ /* Computes the oversize (address + control) size */
+ if(SpiritPktBasicGetAddressField())
+ {
+ overSize=1;
+ }
+ overSize += (uint16_t) SpiritPktBasicGetControlLength();
+
+ /* Reads the RX_PCKT_LENx registers value */
+ g_xStatus = SpiritSpiReadRegisters(RX_PCKT_LEN1_BASE, 2, tempRegValue);
+
+ /* Rebuild and return the length field */
+ return (((((uint16_t) tempRegValue[0]) << 8) + (uint16_t) tempRegValue[1]) - overSize);
+}
+
+/**
+ * @brief Computes and sets the variable payload length for SPIRIT Basic packets.
+ * @param nMaxPayloadLength payload length in bytes.
+ * This parameter is an uint16_t.
+ * @param xAddressField Enable or Disable Address Field.
+ * This parameter can be S_ENABLE or S_DISABLE.
+ * @param xControlLength Control length in bytes.
+ * This parameter can be any value of @ref BasicControlLength.
+ * @retval None.
+ */
+void SpiritPktBasicSetVarLengthWidth(uint16_t nMaxPayloadLength, SpiritFunctionalState xAddressField, BasicControlLength xControlLength)
+{
+ uint8_t tempRegValue,
+ addressLength,
+ i;
+ uint32_t packetLength;
+
+ /* Sets the address length according to xAddressField */
+ if(xAddressField == S_ENABLE)
+ {
+ addressLength=1;
+ }
+ else
+ {
+ addressLength=0;
+ }
+
+ /* packet length = payload length + address length + control length */
+ packetLength=nMaxPayloadLength+addressLength+xControlLength;
+
+ /* Computes the number of bits */
+ for(i=0;i<16;i++)
+ {
+ if(packetLength == 0) break;
+ {
+ packetLength >>= 1;
+ }
+ }
+ i==0 ? i=1 : i;
+
+ /* Reads the PCKTCTRL3 register value */
+ g_xStatus = SpiritSpiReadRegisters(PCKTCTRL3_BASE, 1, &tempRegValue);
+
+ /* Build value for the length width */
+ tempRegValue &= ~PCKTCTRL3_LEN_WID_MASK;
+ tempRegValue |= (uint8_t)(i-1);
+
+ /* Writes the PCKTCTRL3 register value */
+ g_xStatus = SpiritSpiWriteRegisters(PCKTCTRL3_BASE, 1, &tempRegValue);
+
+}
+
+
+
+/**
+ *@}
+ */
+
+/**
+ *@}
+ */
+
+
+/**
+ *@}
+ */
+
+
+
+/******************* (C) COPYRIGHT 2015 STMicroelectronics *****END OF FILE****/
X-NUCLEO-IDS01A4 Sub-1GHz RF Expansion Board