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Changed reaction for uart DMA buffer overruns: In the previous version a DMA was not restarted in case the read pointer is in the chunk which should be filled next. In normal operation this should never happen, in special cases, like debugging, it may occure. In case of an overrun the data may be already outdated and can be discarded. Because of this the new handling of a buffer overflow is to set the read pointer to the start of the chunk => the read function will start with the latest received data. Not yet processed data will be discarded.
author Ideenmodellierer
date Sun, 08 Mar 2026 21:04:36 +0100
parents efb7d18cc564
children
line wrap: on
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/**
  ******************************************************************************
  * @file    uartProtocol_GNSS.h
  * @author  heinrichs weikamp gmbh
  * @version V0.0.1
  * @date    30-Sep-2024
  * @brief	 Interface functionality for operation of gnss devices
  *
  @verbatim
  ==============================================================================
                        ##### How to use #####
  ==============================================================================
  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2014 heinrichs weikamp</center></h2>
  *
  ******************************************************************************
  */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef UART_PROTOCOL_GNSS_H
#define UART_PROTOCOL_GNSS_H

#ifdef __cplusplus
 extern "C" {
#endif

/* Includes ------------------------------------------------------------------*/
#include "configuration.h"
#include "stm32f4xx_hal.h"

 typedef enum
  {
		UART_GNSS_INIT = 0,		/* Default Status for every sensor type */
		UART_GNSS_IDLE,			/* sensor detected and no communication pending */
		UART_GNSS_ERROR,		/* Error message received from sensor */
		UART_GNSS_WARMUP = 10,
		UART_GNSS_INACTIVE,		/* no requests to the receiver */
		UART_GNSS_LOADCONF_0,
		UART_GNSS_LOADCONF_1,
		UART_GNSS_LOADCONF_2,
		UART_GNSS_SETMODE_MOBILE,
		UART_GNSS_SETDATE_TIME,
		UART_GNSS_SET_POSITION,
		UART_GNSS_PWRDOWN,
		UART_GNSS_PWRUP,
		UART_GNSS_SETCONF,		/* save configuration */
		UART_GNSS_GET_PVT,
		UART_GNSS_GET_SAT
  } uartGnssStatus_t;

  typedef enum
  {
  	GNSSRX_READY = 0,			/* Initial state */
	GNSSRX_DETECT_HEADER_0,
	GNSSRX_DETECT_HEADER_1,
	GNSSRX_DETECT_HEADER_2,
	GNSSRX_DETECT_HEADER_3,
	GNSSRX_DETECT_LENGTH_0,
	GNSSRX_DETECT_LENGTH_1,
	GNSSRX_DETECT_ACK_0,
	GNSSRX_DETECT_ACK_1,
	GNSSRX_DETECT_ACK_2,
	GNSSRX_DETECT_ACK_3,
	GNSSRX_READ_DATA,
	GNSSRX_READ_CK_A,
	GNSSRX_READ_CK_B,
  } receiveStateGnss_t;


  typedef enum
  {
  	GNSSCMD_LOADCONF_0 = 0,
	GNSSCMD_LOADCONF_1,
	GNSSCMD_LOADCONF_2,
	GNSSCMD_SETMOBILE,
	GNSSCMD_SETDATETIME,
	GNSSCMD_SET_POSITION,
	GNSSCMD_MODE_PWS,
	GNSSCMD_MODE_NORMAL,
	GNSSCMD_SET_CONFIG,
	GNSSCMD_GET_NAV_DATA,
	GNSSCMD_GET_PVT_DATA,
	GNSSCMD_GET_POSLLH_DATA,
	GNSSCMD_GET_NAVSAT_DATA
  } gnssSensorCmd_t;

  typedef struct
  {
    uint8_t class;
    uint8_t id;
  } gnssRequest_s;

void uartGnss_ReqPowerDown(uint8_t request);
uint8_t uartGnss_isPowerDownRequested(void);
uartGnssStatus_t uartGnss_GetState(void);
void uartGnss_SetState(uartGnssStatus_t newState);
void uartGnss_Control(void);
void uartGnss_ProcessData(uint8_t data);
uint8_t uartGnss_isSensorConnected();
void uartGnss_SendCmd(uint8_t GnssCmd);

#endif /* UART_PROTOCOL_GNSS_H */