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view Small_CPU/Src/uartProtocol_Co2.c @ 801:ff66b41d6fe4
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author | Ideenmodellierer |
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date | Thu, 10 Aug 2023 21:24:04 +0200 |
parents | e9eba334b942 |
children | 9602a7338f28 |
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/** ****************************************************************************** * @file uartProtocol_Co2.c * @author heinrichs weikamp gmbh * @version V0.0.1 * @date 31-Jul-2023 * @brief Interface functionality to external, UART based CO2 sensors * @verbatim @endverbatim ****************************************************************************** * @attention * * <h2><center>© COPYRIGHT(c) 2023 heinrichs weikamp</center></h2> * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include <string.h> #include <uartProtocol_Co2.h> #include "uart.h" #include "externalInterface.h" #ifdef ENABLE_CO2_SUPPORT static uint8_t CO2Connected = 0; /* Binary indicator if a sensor is connected or not */ static receiveState_t rxState = RX_Ready; float LED_Level = 0.0; /* Normalized LED value which may be used as indication for the health status of the sensor */ float LED_ZeroOffset = 0.0; float pCO2 = 0.0; void uartCo2_SendCmd(uint8_t CO2Cmd, uint8_t *cmdString, uint8_t *cmdLength) { switch (CO2Cmd) { case CO2CMD_MODE_POLL: *cmdLength = snprintf((char*)cmdString, 10, "K 2\r\n"); break; case CO2CMD_MODE_STREAM: *cmdLength = snprintf((char*)cmdString, 10, "K 1\r\n"); break; case CO2CMD_CALIBRATE: *cmdLength = snprintf((char*)cmdString, 10, "G\r\n"); break; case CO2CMD_GETDATA: *cmdLength = snprintf((char*)cmdString, 10, "Q\r\n"); break; case CO2CMD_GETSCALE: *cmdLength = snprintf((char*)cmdString, 10, ".\r\n"); break; default: *cmdLength = 0; break; } if(cmdLength != 0) { UART_SendCmdString(cmdString); } } void uartCo2_Control(void) { static uint8_t cmdString[10]; static uint8_t cmdLength = 0; static uint8_t lastComState = 0; uint8_t activeSensor = externalInterface_GetActiveUartSensor(); uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET); uint8_t *pmap = externalInterface_GetSensorMapPointer(0); if(localComState == UART_CO2_ERROR) { localComState = lastComState; } if(localComState == UART_CO2_INIT) { externalInterface_SetCO2Scale(0.0); UART_StartDMA_Receiption(); localComState = UART_CO2_SETUP; } if(localComState == UART_CO2_SETUP) { if(externalInterface_GetCO2Scale() == 0.0) { uartCo2_SendCmd(CO2CMD_GETSCALE, cmdString, &cmdLength); } else { localComState = UART_CO2_IDLE; } } else { if(localComState == UART_CO2_CALIBRATE) { uartCo2_SendCmd(CO2CMD_CALIBRATE, cmdString, &cmdLength); } else if(pmap[EXT_INTERFACE_SENSOR_CNT-1] == SENSOR_MUX) /* sensor is working in polling mode if mux is connected to avoid interference with other sensors */ { //if(cmdLength == 0) /* poll data */ if(localComState == UART_CO2_IDLE) { uartCo2_SendCmd(CO2CMD_GETDATA, cmdString, &cmdLength); localComState = UART_CO2_OPERATING; } else /* resend last command */ { UART_SendCmdString(cmdString); cmdLength = 0; } } else { localComState = UART_CO2_OPERATING; /* sensor in streaming mode if not connected to mux => operating */ } } lastComState = localComState; externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState); } void uartCo2_ProcessData(uint8_t data) { static uint8_t dataType = 0; static uint32_t dataValue = 0; uint8_t activeSensor = externalInterface_GetActiveUartSensor(); uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET); if(rxState == RX_Ready) /* identify data content */ { switch(data) { case 'G': case 'l': case 'D': case 'Z': case '.': dataType = data; rxState = RX_Data0; dataValue = 0; break; case '?': localComState = UART_CO2_ERROR; break; default: /* unknown or corrupted => ignore */ break; } } else if((data >= '0') && (data <= '9')) { if((rxState >= RX_Data0) && (rxState <= RX_Data4)) { dataValue = dataValue * 10 + (data - '0'); rxState++; if(rxState == RX_Data5) { rxState = RX_DataComplete; CO2Connected = 1; } } else /* protocol error data has max 5 digits */ { rxState = RX_Ready; } } if((data == ' ') || (data == '\n')) /* Abort data detection */ { if(rxState == RX_DataComplete) { localComState = UART_CO2_IDLE; if(externalInterface_GetCO2State() == 0) { externalInterface_SetCO2State(EXT_INTERFACE_33V_ON); } switch(dataType) { case 'D': externalInterface_SetCO2SignalStrength(dataValue); break; case 'l': LED_ZeroOffset = dataValue; break; case 'Z': externalInterface_SetCO2Value(dataValue); break; case '.': externalInterface_SetCO2Scale(dataValue); break; default: rxState = RX_Ready; break; } } if(rxState != RX_Data0) /* reset state machine because message in wrong format */ { rxState = RX_Ready; } } externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState); } uint8_t uartCo2_isSensorConnected() { return CO2Connected; } #endif