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Added crc8 lib

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This commit is contained in:
Jan Mrna 2022-06-14 21:44:14 +02:00
parent 7960189a32
commit 9631a4816d
3 changed files with 5 additions and 50 deletions
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5
fw/.cproject
View File

@ -31,6 +31,7 @@
</option>
<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.option.includepaths.1572529382" name="Include paths (-I)" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.option.includepaths" valueType="includePath">
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/Libs/sht4x}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/Libs/crc8}&quot;"/>
</option>
<inputType id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.input.366934534" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.input"/>
</tool>
@ -59,6 +60,7 @@
<listOptionValue builtIn="false" value="../Drivers/CMSIS/Device/ST/STM32L0xx/Include"/>
<listOptionValue builtIn="false" value="../Drivers/CMSIS/Include"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/Libs/sht4x}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/Libs/crc8}&quot;"/>
</option>
<inputType id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.input.c.1544503170" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.input.c"/>
</tool>
@ -87,6 +89,7 @@
<sourceEntries>
<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Core"/>
<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Drivers"/>
<entry flags="VALUE_WORKSPACE_PATH" kind="sourcePath" name="Libs/crc8"/>
<entry flags="VALUE_WORKSPACE_PATH" kind="sourcePath" name="Libs/sht4x"/>
</sourceEntries>
</configuration>
@ -120,6 +123,7 @@
<option id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.option.debuglevel.375884652" name="Debug level" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.option.debuglevel" value="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.option.debuglevel.value.g0" valueType="enumerated"/>
<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.option.includepaths.700537390" name="Include paths (-I)" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.option.includepaths" valueType="includePath">
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/Libs/sht4x}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/Libs/crc8}&quot;"/>
</option>
<inputType id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.input.1707174983" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.assembler.input"/>
</tool>
@ -147,6 +151,7 @@
<listOptionValue builtIn="false" value="../Drivers/CMSIS/Device/ST/STM32L0xx/Include"/>
<listOptionValue builtIn="false" value="../Drivers/CMSIS/Include"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/Libs/sht4x}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/Libs/crc8}&quot;"/>
</option>
<inputType id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.input.c.1160143889" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.input.c"/>
</tool>

22
fw/Core/Inc/crc8.h
View File

@ -1,22 +0,0 @@
/*
* crc.h
*
* Created on: Jun 9, 2021
* Author: user
*/
#ifndef INC_CRC8_H_
#define INC_CRC8_H_
#include "stdint.h"
/*
* Definitions & macros
*/
#define CRC8_POLYNOMIAL ((uint8_t)0x31)
#define CRC8_INIT ((uint8_t)0xFF)
uint8_t crc8_calculate(const uint8_t *data, uint16_t count);
#endif /* INC_CRC8_H_ */

28
fw/Core/Src/crc8.c
View File

@ -1,28 +0,0 @@
/*
* crc.c
*
* Created on: Jun 9, 2021
* Author: user
*/
#include "crc8.h"
/* Stolen from Sensirion SCD4x datasheet, section 3.11 */
uint8_t crc8_calculate(const uint8_t *data, uint16_t count)
{
uint16_t current_byte;
uint8_t crc = CRC8_INIT;
uint8_t crc_bit;
/* calculates 8-Bit checksum with given polynomial */
for (current_byte = 0; current_byte < count; ++current_byte) {
crc ^= (data[current_byte]);
for(crc_bit = 8; crc_bit > 0; --crc_bit) {
if (crc & 0x80) {
crc =(crc << 1) ^ CRC8_POLYNOMIAL;
} else {
crc = (crc << 1);
}
}
}
return crc;
}