Finished base drivers, requires testing

.gitignore

@@ -1,52 +1,54 @@
-# Prerequisites
-*.d
-
-# Object files
-*.o
-*.ko
-*.obj
-*.elf
-
-# Linker output
-*.ilk
-*.map
-*.exp
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Libraries
-*.lib
-*.a
-*.la
-*.lo
-
-# Shared objects (inc. Windows DLLs)
-*.dll
-*.so
-*.so.*
-*.dylib
-
-# Executables
-*.exe
-*.out
-*.app
-*.i*86
-*.x86_64
-*.hex
-
-# Debug files
-*.dSYM/
-*.su
-*.idb
-*.pdb
-
-# Kernel Module Compile Results
-*.mod*
-*.cmd
-.tmp_versions/
-modules.order
-Module.symvers
-Mkfile.old
-dkms.conf
+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf
+
+.vscode/

.vscode/c_cpp_properties.json

@@ -0,0 +1,16 @@
+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [
+                "_DEBUG",
+                "UNICODE",
+                "_UNICODE"
+            ]
+        }
+    ],
+    "version": 4
+}

GPS_DRIVERS/.mxproject

@@ -0,0 +1,25 @@
+[PreviousLibFiles]
+LibFiles=Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_i2c.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_i2c.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal.h;Drivers\STM32L1xx_HAL_Driver\Inc\Legacy\stm32_hal_legacy.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_def.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_rcc.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_rcc_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_bus.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_rcc.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_crs.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_system.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_utils.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_flash.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_flash_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_flash_ramfunc.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_gpio.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_gpio_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_gpio.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_dma_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_dma.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_dma.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_pwr.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_pwr_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_pwr.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_cortex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_cortex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_exti.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_exti.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_tim.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_tim_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_uart.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_usart.h;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_i2c.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_rcc.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_rcc_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_flash.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_flash_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_flash_ramfunc.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_gpio.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_dma.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_pwr.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_pwr_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_cortex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_exti.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_tim.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_tim_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_uart.c;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_i2c.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_i2c.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal.h;Drivers\STM32L1xx_HAL_Driver\Inc\Legacy\stm32_hal_legacy.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_def.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_rcc.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_rcc_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_bus.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_rcc.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_crs.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_system.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_utils.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_flash.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_flash_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_flash_ramfunc.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_gpio.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_gpio_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_gpio.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_dma_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_dma.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_dma.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_pwr.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_pwr_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_pwr.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_cortex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_cortex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_exti.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_exti.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_tim.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_tim_ex.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_hal_uart.h;Drivers\STM32L1xx_HAL_Driver\Inc\stm32l1xx_ll_usart.h;Drivers\CMSIS\Device\ST\STM32L1xx\Include\stm32l152xe.h;Drivers\CMSIS\Device\ST\STM32L1xx\Include\stm32l1xx.h;Drivers\CMSIS\Device\ST\STM32L1xx\Include\system_stm32l1xx.h;Drivers\CMSIS\Device\ST\STM32L1xx\Source\Templates\system_stm32l1xx.c;Drivers\CMSIS\Include\cmsis_armcc.h;Drivers\CMSIS\Include\cmsis_armclang.h;Drivers\CMSIS\Include\cmsis_compiler.h;Drivers\CMSIS\Include\cmsis_gcc.h;Drivers\CMSIS\Include\cmsis_iccarm.h;Drivers\CMSIS\Include\cmsis_version.h;Drivers\CMSIS\Include\core_armv8mbl.h;Drivers\CMSIS\Include\core_armv8mml.h;Drivers\CMSIS\Include\core_cm0.h;Drivers\CMSIS\Include\core_cm0plus.h;Drivers\CMSIS\Include\core_cm1.h;Drivers\CMSIS\Include\core_cm23.h;Drivers\CMSIS\Include\core_cm3.h;Drivers\CMSIS\Include\core_cm33.h;Drivers\CMSIS\Include\core_cm4.h;Drivers\CMSIS\Include\core_cm7.h;Drivers\CMSIS\Include\core_sc000.h;Drivers\CMSIS\Include\core_sc300.h;Drivers\CMSIS\Include\mpu_armv7.h;Drivers\CMSIS\Include\mpu_armv8.h;Drivers\CMSIS\Include\tz_context.h;
+
+[PreviousUsedCubeIDEFiles]
+SourceFiles=Core\Src\main.c;Core\Src\stm32l1xx_it.c;Core\Src\stm32l1xx_hal_msp.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_i2c.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_rcc.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_rcc_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_flash.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_flash_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_flash_ramfunc.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_gpio.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_dma.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_pwr.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_pwr_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_cortex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_exti.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_tim.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_tim_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_uart.c;Drivers\CMSIS\Device\ST\STM32L1xx\Source\Templates\system_stm32l1xx.c;Core\Src\system_stm32l1xx.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_i2c.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_rcc.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_rcc_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_flash.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_flash_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_flash_ramfunc.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_gpio.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_dma.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_pwr.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_pwr_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_cortex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_exti.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_tim.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_tim_ex.c;Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_uart.c;Drivers\CMSIS\Device\ST\STM32L1xx\Source\Templates\system_stm32l1xx.c;Core\Src\system_stm32l1xx.c;;;
+HeaderPath=Drivers\STM32L1xx_HAL_Driver\Inc;Drivers\STM32L1xx_HAL_Driver\Inc\Legacy;Drivers\CMSIS\Device\ST\STM32L1xx\Include;Drivers\CMSIS\Include;Core\Inc;
+CDefines=USE_HAL_DRIVER;STM32L152xE;USE_HAL_DRIVER;USE_HAL_DRIVER;
+
+[PreviousGenFiles]
+AdvancedFolderStructure=true
+HeaderFileListSize=3
+HeaderFiles#0=..\Core\Inc\stm32l1xx_it.h
+HeaderFiles#1=..\Core\Inc\stm32l1xx_hal_conf.h
+HeaderFiles#2=..\Core\Inc\main.h
+HeaderFolderListSize=1
+HeaderPath#0=..\Core\Inc
+HeaderFiles=;
+SourceFileListSize=3
+SourceFiles#0=..\Core\Src\stm32l1xx_it.c
+SourceFiles#1=..\Core\Src\stm32l1xx_hal_msp.c
+SourceFiles#2=..\Core\Src\main.c
+SourceFolderListSize=1
+SourcePath#0=..\Core\Src
+SourceFiles=;
+

GPS_DRIVERS/.project

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>GPS_DRIVERS</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>
+			<triggers>clean,full,incremental,</triggers>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>
+			<triggers>full,incremental,</triggers>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>com.st.stm32cube.ide.mcu.MCUProjectNature</nature>
+		<nature>com.st.stm32cube.ide.mcu.MCUCubeProjectNature</nature>
+		<nature>org.eclipse.cdt.core.cnature</nature>
+		<nature>com.st.stm32cube.ide.mcu.MCUCubeIdeServicesRevAev2ProjectNature</nature>
+		<nature>com.st.stm32cube.ide.mcu.MCUAdvancedStructureProjectNature</nature>
+		<nature>com.st.stm32cube.ide.mcu.MCUSingleCpuProjectNature</nature>
+		<nature>com.st.stm32cube.ide.mcu.MCURootProjectNature</nature>
+		<nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>
+		<nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
+	</natures>
+</projectDescription>

GPS_DRIVERS/.settings/com.st.stm32cube.ide.mcu.sfrview.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+sfrviewstate={"fFavorites"\:{"fLists"\:{}},"fProperties"\:{"fNodeProperties"\:{}}}

GPS_DRIVERS/.settings/language.settings.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<project>
+	<configuration id="com.st.stm32cube.ide.mcu.gnu.managedbuild.config.exe.debug.68605761" name="Debug">
+		<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
+			<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
+			<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
+			<provider class="com.st.stm32cube.ide.mcu.toolchain.armnone.setup.CrossBuiltinSpecsDetector" console="false" env-hash="1466955137373753251" id="com.st.stm32cube.ide.mcu.toolchain.armnone.setup.CrossBuiltinSpecsDetector" keep-relative-paths="false" name="MCU ARM GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
+				<language-scope id="org.eclipse.cdt.core.gcc"/>
+				<language-scope id="org.eclipse.cdt.core.g++"/>
+			</provider>
+		</extension>
+	</configuration>
+	<configuration id="com.st.stm32cube.ide.mcu.gnu.managedbuild.config.exe.release.1375633609" name="Release">
+		<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
+			<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
+			<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
+			<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
+			<provider class="com.st.stm32cube.ide.mcu.toolchain.armnone.setup.CrossBuiltinSpecsDetector" console="false" env-hash="1466955137373753251" id="com.st.stm32cube.ide.mcu.toolchain.armnone.setup.CrossBuiltinSpecsDetector" keep-relative-paths="false" name="MCU ARM GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
+				<language-scope id="org.eclipse.cdt.core.gcc"/>
+				<language-scope id="org.eclipse.cdt.core.g++"/>
+			</provider>
+		</extension>
+	</configuration>
+</project>

GPS_DRIVERS/.settings/stm32cubeide.project.prefs

@@ -0,0 +1,5 @@
+635E684B79701B039C64EA45C3F84D30=1A939CABBB88A3663958E56CF4748F57
+66BE74F758C12D739921AEA421D593D3=0
+8DF89ED150041C4CBC7CB9A9CAA90856=C9D8D67AD006D7107F8B5EB7AA47F88D
+DC22A860405A8BF2F2C095E5B6529F12=9FA0E749C26A7524EBA32EE38D54C304
+eclipse.preferences.version=1

GPS_DRIVERS/Core/Inc/M8N.h

@@ -0,0 +1,103 @@
+/*
+ * M8N.h
+ *
+ *  Created on: Oct 13, 2023
+ *      Author: Nathan Ante
+ */
+
+
+#ifndef INC_M8N_H_
+#define INC_M8N_H_
+
+#include<stdint.h>
+
+/*-------------- Private Macros --------------*/
+#define GPS_DEVICE_ADDRESS (0x42 << 1)	// GPS device address is 0x42, left-shifted for STM32 uses 7-bit address
+#define GPS_DATA_REGISTER 0xFF		    // register address for GPS data stream
+
+// In case for "random access" read from i2c (refer to page 38 of data sheet)
+#define GPS_DATA_LENGTH_HIGH 0xFD	// register address for GPS data length (high byte)
+#define GPS_DATA_LENGTH_LOW 0xFE	// register address for GPS data length (low byte)
+
+/*
+ * This struct consists of the values parsed from the message rectrieved from the receiver.
+ * Created an identifier called NavData for ease of use
+ */
+typedef struct UBX_M8N_NAV_POSLLH {
+	uint32_t iTOW;	// GPS time of week of the navigation epoch (ms)
+	int32_t lon;	// Longitude (deg)
+	int32_t lat;	// Latitude (deg)
+	int32_t height;	// Height above ellipsoid (mm)
+	int32_t hMSL;	// Height above mean sea level (mm)
+	uint32_t hAcc;	// Horizontal accuracy estimate (mm)
+	uint32_t vAcc;	// Vertical accuracy estimate (mm)
+} NavData;
+
+/* 	This function parses the payload retreived from the NAV_POSLLH message and
+ * 	stores the values in the NAV_POSLLH_Data struct object. These are real world values,
+ * 	description and units for these values are commented in the struct declaration above.
+ *
+ * 	Arguments:
+ * 		pointer to buffer
+ *
+ * 	Refer to U-Blox 8 / U-Blox M8 Receiver desciption and protocol specification
+ *	Section 32.17.16 UBX-NAV-POSLLH (0x01 0x02)
+ *	Page 374
+ */
+void UBX_M8N_NAV_POSLLH_Parsing(uint8_t *buffer, NavData* data);
+
+/*	This function validates the data retrieved from the GPS receiver using a checksum.
+ * 	Checksum is calculated over the message, starting and including CLASS field byte up
+ * 	until but not including the Checksum field bytes. After calculating the checksum from
+ * 	the message payload, compare with CHECKSUM fields in buffer, if equal then data from
+ * 	message is valid.
+ *
+ *	Arguments:
+ *		pointer to buffer(message)
+ *		length of buffer
+ *
+ *	Returns:
+ *		16 bit unsigned integer / 2 byte checksum
+ *		i.e. [CK_A][CK_B] where CK_A and CK_B are 8 bit unsigned integers / byte
+ *
+ *	Refer to U-Blox 8 / U-Blox M8 Receiver desciption and protocol specification
+ *	Section 32.4 UBX Checksum
+ *	Page 171
+ */
+uint16_t UBX_M8N_CHECKSUM(uint8_t *buffer, uint8_t buflen);
+
+
+/*  This function sets a desired configuration in the GPS receiver, it does this by transmitting
+ *  a UBX-CFG message to the receiver, upon receiving, the receiver will transmit either a 
+ *  UBX-ACK-ACK message upon successful configuration, or a UBX-ACK-NAK message upon unsuccessful
+ *  configuration.
+ * 
+ *  Arguments:
+ * 		pointer to buffer(config message)
+ * 		length of buffer
+ * 
+ * 	No returns, function will terminate program upon unsuccessful configuration
+ * 
+ *  Refer to U-Blox 8 / U-Blox M8 Receiver desciption and protocol specification
+*/
+void CONFIG_Transmit(uint8_t *buffer, uint16_t buflen);
+
+/*  Initialize GPS with our desired configs
+ *  i.e. i2c communication with UBX message protocol
+*/
+void GPS_Initialization(void);
+
+/* After writing to the GPS Data Stream Register (i.e. configs and such),
+ * the receiver should store its response in the same register. It also stores
+ * the length of the response on registers 0xFD (high-byte) abd 0xFE (low-byte).
+ *
+ * This function retrieves the length from registers 0xFD and 0xFE and returns it as a uint16_t
+ */
+uint16_t UBX_GET_LENGTH(void);
+
+
+void UBX_Transmit(uint8_t *buffer, uint16_t buflen);
+
+void UBX_Receive(uint8_t *buffer, uint16_t buflen);
+
+#endif /* INC_M8N_H_ */

GPS_DRIVERS/Core/Inc/main.h

@@ -0,0 +1,72 @@
+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file           : main.h
+  * @brief          : Header for main.c file.
+  *                   This file contains the common defines of the application.
+  ******************************************************************************
+  * @attention
+  *
+  * Copyright (c) 2023 STMicroelectronics.
+  * All rights reserved.
+  *
+  * This software is licensed under terms that can be found in the LICENSE file
+  * in the root directory of this software component.
+  * If no LICENSE file comes with this software, it is provided AS-IS.
+  *
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __MAIN_H
+#define __MAIN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l1xx_hal.h"
+
+/* Private includes ----------------------------------------------------------*/
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* Exported types ------------------------------------------------------------*/
+/* USER CODE BEGIN ET */
+
+/* USER CODE END ET */
+
+/* Exported constants --------------------------------------------------------*/
+/* USER CODE BEGIN EC */
+
+/* USER CODE END EC */
+
+/* Exported macro ------------------------------------------------------------*/
+/* USER CODE BEGIN EM */
+
+/* USER CODE END EM */
+
+/* Exported functions prototypes ---------------------------------------------*/
+void Error_Handler(void);
+
+/* USER CODE BEGIN EFP */
+
+/* USER CODE END EFP */
+
+/* Private defines -----------------------------------------------------------*/
+#define B1_Pin GPIO_PIN_13
+#define B1_GPIO_Port GPIOC
+#define B1_EXTI_IRQn EXTI15_10_IRQn
+
+/* USER CODE BEGIN Private defines */
+
+/* USER CODE END Private defines */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __MAIN_H */