esp32_BNO08x 1.2
C++ BNO08x IMU driver component for esp-idf.
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BNO08x_macros.hpp File Reference
#include <inttypes.h>
#include <freertos/FreeRTOS.h>
#include <freertos/event_groups.h>
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Macros

#define CHECK_TASKS_RUNNING(evt_grp_task_flow, running_bit)   ((xEventGroupGetBits(evt_grp_task_flow) & (running_bit)) != 0)
 Clears the most significant byte of a 16-bit value.
 
#define UINT16_CLR_MSB(val_16bit)   ((val_16bit) & 0x00FFU)
 Clears the most significant byte of a 16-bit value.
 
#define UINT16_CLR_LSB(val_16bit)   ((val_16bit) & 0xFF00U)
 Clears the least significant byte of a 16-bit value.
 
#define UINT32_CLR_BYTE(val_32bit, byte2clear)   ((val_32bit) & ~(0xFFUL << (byte2clear * 8UL)))
 Clears a specified byte in a 32-bit value.
 
#define UINT32_MSK_BYTE(val_32bit, byte2mask)   ((val_32bit) & (0xFFUL << (byte2mask * 8UL)))
 Masks a specified byte in a 32-bit value.
 
#define PARSE_PACKET_LENGTH(packet_ptr)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet_ptr->header[1]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet_ptr->header[0])))
 Parse length from SHTP packet header.
 
#define PARSE_PACKET_TIMESTAMP(packet_ptr)
 Parse timestamp from SHTP packet.
 
#define PARSE_PRODUCT_ID_REPORT_RESET_REASON(packet_ptr)   UINT32_MSK_BYTE(static_cast<uint32_t>(packet_ptr->body[1]), 0UL)
 Parse reset reason from SHTP packet containing product ID report.
 
#define PARSE_PRODUCT_ID_REPORT_SW_PART_NO(packet_ptr)
 Parse sw part number from SHTP packet containing product ID report.
 
#define PARSE_PRODUCT_ID_REPORT_SW_BUILD_NO(packet_ptr)
 Parse sw build number from SHTP packet containing product ID report.
 
#define PARSE_PRODUCT_ID_REPORT_SW_VERSION_PATCH(packet_ptr)    (UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[13]) << 8UL, 1UL) | UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[12]), 0UL))
 Parse sw version patch from SHTP packet containing product ID report.
 
#define PARSE_PRODUCT_ID_REPORT_PRODUCT_ID(packet_ptr)   UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[0]), 0UL)
 Parse product ID SHTP packet containing product ID report.
 
#define PARSE_PRODUCT_ID_REPORT_SW_VERSION_MAJOR(packet_ptr)   UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[2]), 0UL)
 Parse product sw version major containing product ID report.
 
#define PARSE_PRODUCT_ID_REPORT_SW_VERSION_MINOR(packet_ptr)   UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[3]), 0UL)
 Parse product sw version minor containing product ID report.
 
#define PARSE_GYRO_REPORT_RAW_QUAT_I(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[1]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[0])))
 Parse quat I data from integrated gyro rotation vector report.
 
#define PARSE_GYRO_REPORT_RAW_QUAT_J(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[3]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[2])))
 Parse quat J data from integrated gyro rotation vector report.
 
#define PARSE_GYRO_REPORT_RAW_QUAT_K(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[4])))
 Parse quat K data from integrated gyro rotation vector report.
 
#define PARSE_GYRO_REPORT_RAW_QUAT_REAL(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[7]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[6])))
 Parse quat real data from integrated gyro rotation vector report.
 
#define PARSE_GYRO_REPORT_RAW_GYRO_VEL_X(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[9]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[8])))
 Parse x axis velocity data from integrated gyro rotation vector report.
 
#define PARSE_GYRO_REPORT_RAW_GYRO_VEL_Y(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[11]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[10])))
 Parse y axis velocity data from integrated gyro rotation vector report.
 
#define PARSE_GYRO_REPORT_RAW_GYRO_VEL_Z(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[13]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[12])))
 Parse z axis velocity data from integrated gyro rotation vector report.
 
#define PARSE_INPUT_REPORT_STATUS_BITS(packet)   (packet->body[5 + 2] & 0x03U)
 Parse status bits from input report.
 
#define PARSE_INPUT_REPORT_REPORT_ID(packet)   UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5]))
 Parse report ID from input report.
 
#define PARSE_INPUT_REPORT_DATA_1(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 5]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 4])))
 Parse first data block from input report.
 
#define PARSE_INPUT_REPORT_DATA_2(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 7]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 6])))
 Parse second data block from input report.
 
#define PARSE_INPUT_REPORT_DATA_3(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 9]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 8])))
 Parse third data block from input report.
 
#define PARSE_INPUT_REPORT_DATA_4(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 11]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 10])))
 Parse fourth data block from input report.
 
#define PARSE_INPUT_REPORT_DATA_5(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 13]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 12])))
 Parse fifth data block from input report.
 
#define PARSE_INPUT_REPORT_DATA_6(packet)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 15]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 14])))
 Parse sixth data block from input report.
 
#define IS_ROTATION_VECTOR_REPORT(packet)
 Checks if packet containing input report is a rotation vector report.
 
#define PARSE_FRS_READ_RESPONSE_REPORT_RECORD_ID(packet_body)    (UINT16_CLR_LSB(static_cast<uint16_t>(packet_body[13]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet_body[12])))
 Parse FRS record ID from FRS read response report.
 
#define PARSE_FRS_READ_RESPONSE_REPORT_DATA_1(packet_body)
 Parse data block 1 from FRS read response report.
 
#define PARSE_FRS_READ_RESPONSE_REPORT_DATA_2(packet_body)
 Parse data block 2 from FRS read response report.
 

Detailed Description

Author
Myles Parfeniuk

Macro Definition Documentation

◆ CHECK_TASKS_RUNNING

#define CHECK_TASKS_RUNNING ( evt_grp_task_flow,
running_bit )   ((xEventGroupGetBits(evt_grp_task_flow) & (running_bit)) != 0)

Clears the most significant byte of a 16-bit value.

Parameters
evt_grp_task_flowTask flow event group handle.
running_bitEVT_GRP_TSK_FLW_RUNNING_BIT
Returns
The value with the MSB cleared.

◆ IS_ROTATION_VECTOR_REPORT

#define IS_ROTATION_VECTOR_REPORT ( packet)
Value:
((packet)->body[5] == SENSOR_REPORT_ID_ROTATION_VECTOR || (packet)->body[5] == SENSOR_REPORT_ID_GAME_ROTATION_VECTOR || \
(packet)->body[5] == SENSOR_REPORT_ID_ARVR_STABILIZED_ROTATION_VECTOR || \
(packet)->body[5] == SENSOR_REPORT_ID_ARVR_STABILIZED_GAME_ROTATION_VECTOR)

Checks if packet containing input report is a rotation vector report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
True if contained input report is rotation vector report.

◆ PARSE_FRS_READ_RESPONSE_REPORT_DATA_1

#define PARSE_FRS_READ_RESPONSE_REPORT_DATA_1 ( packet_body)
Value:
(UINT32_MSK_BYTE(static_cast<uint32_t>(packet_body[7]) << 24UL, 3UL) | UINT32_MSK_BYTE(static_cast<uint32_t>(packet_body[6]) << 16UL, 2UL) | \
UINT32_MSK_BYTE(static_cast<uint32_t>(packet_body[5]) << 8UL, 1UL) | UINT32_MSK_BYTE(static_cast<uint32_t>(packet_body[4]), 0UL))
#define UINT32_MSK_BYTE(val_32bit, byte2mask)
Masks a specified byte in a 32-bit value.
Definition BNO08x_macros.hpp:58

Parse data block 1 from FRS read response report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
FRS read response data block 1.

◆ PARSE_FRS_READ_RESPONSE_REPORT_DATA_2

#define PARSE_FRS_READ_RESPONSE_REPORT_DATA_2 ( packet_body)
Value:
(UINT32_MSK_BYTE(static_cast<uint32_t>(packet_body[11]) << 24UL, 3UL) | UINT32_MSK_BYTE(static_cast<uint32_t>(packet_body[10]) << 16UL, 2UL) | \
UINT32_MSK_BYTE(static_cast<uint32_t>(packet_body[9]) << 8UL, 1UL) | UINT32_MSK_BYTE(static_cast<uint32_t>(packet_body[8]), 0UL))

Parse data block 2 from FRS read response report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
FRS read response data block 2.

◆ PARSE_FRS_READ_RESPONSE_REPORT_RECORD_ID

#define PARSE_FRS_READ_RESPONSE_REPORT_RECORD_ID ( packet_body)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet_body[13]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet_body[12])))

Parse FRS record ID from FRS read response report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
FRS record ID.

◆ PARSE_GYRO_REPORT_RAW_GYRO_VEL_X

#define PARSE_GYRO_REPORT_RAW_GYRO_VEL_X ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[9]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[8])))

Parse x axis velocity data from integrated gyro rotation vector report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
x velocity data.

◆ PARSE_GYRO_REPORT_RAW_GYRO_VEL_Y

#define PARSE_GYRO_REPORT_RAW_GYRO_VEL_Y ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[11]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[10])))

Parse y axis velocity data from integrated gyro rotation vector report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
y velocity data.

◆ PARSE_GYRO_REPORT_RAW_GYRO_VEL_Z

#define PARSE_GYRO_REPORT_RAW_GYRO_VEL_Z ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[13]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[12])))

Parse z axis velocity data from integrated gyro rotation vector report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
z velocity data.

◆ PARSE_GYRO_REPORT_RAW_QUAT_I

#define PARSE_GYRO_REPORT_RAW_QUAT_I ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[1]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[0])))

Parse quat I data from integrated gyro rotation vector report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Quat I data.

◆ PARSE_GYRO_REPORT_RAW_QUAT_J

#define PARSE_GYRO_REPORT_RAW_QUAT_J ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[3]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[2])))

Parse quat J data from integrated gyro rotation vector report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Quat J data.

◆ PARSE_GYRO_REPORT_RAW_QUAT_K

#define PARSE_GYRO_REPORT_RAW_QUAT_K ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[4])))

Parse quat K data from integrated gyro rotation vector report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Quat K data.

◆ PARSE_GYRO_REPORT_RAW_QUAT_REAL

#define PARSE_GYRO_REPORT_RAW_QUAT_REAL ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[7]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[6])))

Parse quat real data from integrated gyro rotation vector report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Quat real data.

◆ PARSE_INPUT_REPORT_DATA_1

#define PARSE_INPUT_REPORT_DATA_1 ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 5]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 4])))

Parse first data block from input report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
First data block of input report.

◆ PARSE_INPUT_REPORT_DATA_2

#define PARSE_INPUT_REPORT_DATA_2 ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 7]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 6])))

Parse second data block from input report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Second data block of input report.

◆ PARSE_INPUT_REPORT_DATA_3

#define PARSE_INPUT_REPORT_DATA_3 ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 9]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 8])))

Parse third data block from input report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
third data block of input report.

◆ PARSE_INPUT_REPORT_DATA_4

#define PARSE_INPUT_REPORT_DATA_4 ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 11]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 10])))

Parse fourth data block from input report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
fourth data block of input report.

◆ PARSE_INPUT_REPORT_DATA_5

#define PARSE_INPUT_REPORT_DATA_5 ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 13]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 12])))

Parse fifth data block from input report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
fifth data block of input report.

◆ PARSE_INPUT_REPORT_DATA_6

#define PARSE_INPUT_REPORT_DATA_6 ( packet)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet->body[5 + 15]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5 + 14])))

Parse sixth data block from input report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
sixth data block of input report.

◆ PARSE_INPUT_REPORT_REPORT_ID

#define PARSE_INPUT_REPORT_REPORT_ID ( packet)    UINT16_CLR_MSB(static_cast<uint16_t>(packet->body[5]))

Parse report ID from input report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Report ID.

◆ PARSE_INPUT_REPORT_STATUS_BITS

#define PARSE_INPUT_REPORT_STATUS_BITS ( packet)    (packet->body[5 + 2] & 0x03U)

Parse status bits from input report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Input report status bits.

◆ PARSE_PACKET_LENGTH

#define PARSE_PACKET_LENGTH ( packet_ptr)     (UINT16_CLR_LSB(static_cast<uint16_t>(packet_ptr->header[1]) << 8U) | UINT16_CLR_MSB(static_cast<uint16_t>(packet_ptr->header[0])))

Parse length from SHTP packet header.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Length of SHTP packet.

◆ PARSE_PACKET_TIMESTAMP

#define PARSE_PACKET_TIMESTAMP ( packet_ptr)
Value:
(UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[4]) << 24UL, 3UL) | UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[3]) << 16UL, 2UL) | \
UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[2]) << 8UL, 1UL) | UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[1]), 0UL))

Parse timestamp from SHTP packet.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Packet timestamp.

◆ PARSE_PRODUCT_ID_REPORT_PRODUCT_ID

#define PARSE_PRODUCT_ID_REPORT_PRODUCT_ID ( packet_ptr)    UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[0]), 0UL)

Parse product ID SHTP packet containing product ID report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Product ID.

◆ PARSE_PRODUCT_ID_REPORT_RESET_REASON

#define PARSE_PRODUCT_ID_REPORT_RESET_REASON ( packet_ptr)    UINT32_MSK_BYTE(static_cast<uint32_t>(packet_ptr->body[1]), 0UL)

Parse reset reason from SHTP packet containing product ID report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
Reset reason.

◆ PARSE_PRODUCT_ID_REPORT_SW_BUILD_NO

#define PARSE_PRODUCT_ID_REPORT_SW_BUILD_NO ( packet_ptr)
Value:
UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[11]) << 24UL, 3UL) | UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[10]) << 16UL, 2UL) | \
UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[9]) << 8UL, 1UL) | UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[8]), 0UL)

Parse sw build number from SHTP packet containing product ID report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
sw build number.

◆ PARSE_PRODUCT_ID_REPORT_SW_PART_NO

#define PARSE_PRODUCT_ID_REPORT_SW_PART_NO ( packet_ptr)
Value:
(UINT32_MSK_BYTE(static_cast<uint32_t>(packet_ptr->body[7]) << 24UL, 3UL) | \
UINT32_MSK_BYTE(static_cast<uint32_t>(packet_ptr->body[6]) << 16UL, 2UL) | \
UINT32_MSK_BYTE(static_cast<uint32_t>(packet_ptr->body[5]) << 8UL, 1UL) | \
UINT32_MSK_BYTE(static_cast<uint32_t>(packet_ptr->body[4]), 0UL))

Parse sw part number from SHTP packet containing product ID report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
sw part number.

◆ PARSE_PRODUCT_ID_REPORT_SW_VERSION_MAJOR

#define PARSE_PRODUCT_ID_REPORT_SW_VERSION_MAJOR ( packet_ptr)    UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[2]), 0UL)

Parse product sw version major containing product ID report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
sw version major.

◆ PARSE_PRODUCT_ID_REPORT_SW_VERSION_MINOR

#define PARSE_PRODUCT_ID_REPORT_SW_VERSION_MINOR ( packet_ptr)    UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[3]), 0UL)

Parse product sw version minor containing product ID report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
sw version minor.

◆ PARSE_PRODUCT_ID_REPORT_SW_VERSION_PATCH

#define PARSE_PRODUCT_ID_REPORT_SW_VERSION_PATCH ( packet_ptr)     (UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[13]) << 8UL, 1UL) | UINT32_MSK_BYTE(static_cast<uint32_t>(packet->body[12]), 0UL))

Parse sw version patch from SHTP packet containing product ID report.

Parameters
packetPointer to bno08x_rx_packet_t containing data.
Returns
sw version patch.

◆ UINT16_CLR_LSB

#define UINT16_CLR_LSB ( val_16bit)    ((val_16bit) & 0xFF00U)

Clears the least significant byte of a 16-bit value.

Parameters
val_16bitThe 16-bit value to modify.
Returns
The value with the MSB cleared.

◆ UINT16_CLR_MSB

#define UINT16_CLR_MSB ( val_16bit)    ((val_16bit) & 0x00FFU)

Clears the most significant byte of a 16-bit value.

Parameters
val_16bitThe 16-bit value to modify.
Returns
The value with the MSB cleared.

◆ UINT32_CLR_BYTE

#define UINT32_CLR_BYTE ( val_32bit,
byte2clear )   ((val_32bit) & ~(0xFFUL << (byte2clear * 8UL)))

Clears a specified byte in a 32-bit value.

Parameters
val_32bitThe 32-bit value to modify.
byte2clearThe byte index to clear (0 = LSB, 3 = MSB).
Returns
The value with the specified byte cleared.

◆ UINT32_MSK_BYTE

#define UINT32_MSK_BYTE ( val_32bit,
byte2mask )   ((val_32bit) & (0xFFUL << (byte2mask * 8UL)))

Masks a specified byte in a 32-bit value.

Parameters
val_32bitThe 32-bit value to modify.
byte2maskThe byte index to mask (0 = LSB, 3 = MSB).
Returns
The value with the specified byte masked.