Add command to read firmware version

src/commands.c

@@ -248,7 +248,7 @@ command_func_t* const cmd_table[NUM_PRIMARY_CMDS + 1][NUM_SECONDARY_CMDS_MAX + 1
      // 0                               1 GET_CTMU_VOLTAGE              2 GET_CAPACITANCE               3 GET_FREQUENCY
         Undefined,                      MULTIMETER_GetCTMUVolts,        MULTIMETER_GetCapacitance,      Unimplemented,
      // 4 GET_INDUCTANCE                5 GET_VERSION                   6                               7
-        Unimplemented,                  DEVICE_GetVersion,              Undefined,                      Undefined,
+        Unimplemented,                  DEVICE_GetVersion,              DEVICE_get_fw_version,          Undefined,
      // 8 RETRIEVE_BUFFER               9 GET_HIGH_FREQUENCY            10 CLEAR_BUFFER                 11 SET_RGB1
         BUFFER_Retrieve,                Unimplemented,                  BUFFER_Clear,                   Removed,
      // 12 READ_PROGRAM_ADDRESS         13 WRITE_PROGRAM_ADDRESS        14 READ_DATA_ADDRESS            15 WRITE_DATA_ADDRESS

src/helpers/device.c

@@ -1,11 +1,26 @@
 #include <stdint.h>
+#include <stddef.h>
 
 #include "../bus/uart/uart.h"
 #include "../commands.h"
 #include "../registers/system/pin_manager.h"
 #include "../registers/system/watchdog.h"
 
+#define SEMVERS 3
+
 const uint8_t VERSION_HW[] = "PSLab V6"; /** Hardware version. **/
+union {
+    struct {
+        uint8_t const major;
+        uint8_t const minor;
+        uint8_t const patch;
+    };
+    uint8_t const version[SEMVERS];
+} VERSION_FW = {{
+    .major = 3,
+    .minor = 0,
+    .patch = 0
+}};
 
 response_t DEVICE_GetVersion(void) {
     uint8_t i;
@@ -14,6 +29,13 @@ response_t DEVICE_GetVersion(void) {
     return DO_NOT_BOTHER;
 }
 
+response_t DEVICE_get_fw_version(void) {
+    for (size_t i = 0; i < SEMVERS; ++i) {
+        UART1_Write(VERSION_FW.version[i]);
+    }
+    return DO_NOT_BOTHER;
+}
+
 response_t DEVICE_Reset(void) {
     __asm__ volatile ("reset");
     return DO_NOT_BOTHER;

src/helpers/device.h

@@ -11,6 +11,12 @@ extern "C" {
      */
     response_t DEVICE_GetVersion(void);
 
+    /**
+     * @brief Get firmware version.
+     * @return MAJOR (uint8_t), MINOR (uint8_t), PATCH (uint8_t)
+     */
+    response_t DEVICE_get_fw_version(void);
+
     /**
      * @brief Reset the device by moving program counter to 0x0000
      * @return DO_NOT_BOTHER