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1077
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1 /**
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2 ******************************************************************************
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3 * @file uartProtocol_HUD.h
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4 * @author heinrichs weikamp gmbh
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5 * @version V0.0.1
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6 * @date 24-Feb-2026
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7 * @brief Interface functionality to handle external, UART based CO2 sensors
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8 *
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9 @verbatim
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10 ==============================================================================
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11 ##### How to use #####
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12 ==============================================================================
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13 @endverbatim
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14 ******************************************************************************
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15 * @attention
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16 *
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17 * <h2><center>© COPYRIGHT(c) 2014 heinrichs weikamp</center></h2>
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18 *
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19 ******************************************************************************
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20 */
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21
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22 /* Define to prevent recursive inclusion -------------------------------------*/
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23 #ifndef UART_PROTOCOL_HUD_H
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24 #define UART_PROTOCOL_HUD_H
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25
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26 #ifdef __cplusplus
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27 extern "C" {
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28 #endif
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29
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30 /* Includes ------------------------------------------------------------------*/
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31 #include "configuration.h"
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32 #include "stm32f4xx_hal.h"
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33
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34
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35 #define HUD_INFO_DATA_LENGTH (24u) /* expected number of received info data */
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36 #define HUD_MAX_CMD_LENGTH (32u) /* max length for a command sequence */
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37
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38 #define HUD_CMD_BYTE_START (0xAA) /* Start byte */
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39 #define HUD_CMD_BYTE_INFO (0x10) /* Request HUD info */
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40 #define HUD_CMD_BYTE_UPDATE (0x20) /* Update LED sequence command */
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41 #define HUD_CMD_BYTE_STOP (0x30) /* Stip LED sequence execution */
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42
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43 typedef enum
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44 {
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45 UART_HUD_INIT = 0, /* Default Status for every sensor type */
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46 UART_HUD_IDLE, /* sensor detected and no communication pending */
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47 UART_HUD_ERROR,
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48 UART_HUD_SETUP = 10, /* collecting data */
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49 UART_HUD_UPDATE, /* update the HUD status LEDs */
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50 UART_HUD_ABORT, /* abort status sequence */
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51 } uartHUDStatus_t;
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52
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53 typedef enum
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54 {
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55 HUDRX_Ready= 0, /* Initial state */
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56 HUDRX_DetectStart, /* validate start byte */
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57 HUDRX_RXData,
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58 HUDRX_CheckSum_L,
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59 HUDRX_CheckSum_H,
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60 HUDRX_DataComplete
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61 } receiveStateHUD_t;
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62
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63
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64 typedef enum
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65 {
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66 HUDCMD_GETINFO = 0, /* Get HUD info */
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67 HUDCMD_UPDATE, /* Update LED sequence */
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68 HUDCMD_ABORTSEQ /* Abort LED sequence */
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69 } hudSensorCmd_t;
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70
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71
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72 void uartHUD_Control(void);
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73 void uartHUD_ProcessData(uint8_t data);
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74 void uartHUD_SendCmd(uint8_t HUDCmd);
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75 uint8_t uartHUD_isSensorConnected();
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76
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77 #endif /* UART_PROTOCOL_HUD_H */
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