Mercurial > public > ostc4
annotate Small_CPU/Src/i2c.c @ 729:d646a0f724a7
Added auto detection functionality for sensors connected to the external interface:
O2 sensors may be connected to the analog input as well as to the UART. The GUI visualization provides three slots for ppo2 display. Beside detection of sensor kind the task of the function is to place the available sensor in this three slots. CO2 has its own communication slot outside the ppo2 channel.
The result of the automatic detection is communicated via the sensor map.
| author | Ideenmodellierer |
|---|---|
| date | Sat, 14 Jan 2023 20:46:17 +0100 |
| parents | 4fe5400567e7 |
| children |
| rev | line source |
|---|---|
| 38 | 1 #include "baseCPU2.h" |
| 2 #include "i2c.h" | |
| 3 #include "scheduler.h" | |
| 4 | |
| 5 /* Private typedef -----------------------------------------------------------*/ | |
| 6 /* Private define ------------------------------------------------------------*/ | |
| 7 /* Private macro -------------------------------------------------------------*/ | |
| 8 | |
| 9 | |
| 10 // =============================================================================== | |
| 11 // I2C addresses - see i2c.h | |
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12 // =============================================================================== |
| 38 | 13 |
| 14 I2C_HandleTypeDef I2cHandle; | |
| 15 | |
| 16 | |
| 17 /* | |
| 18 static void I2C_Error_Handler(void) | |
| 19 { | |
| 20 while(1) | |
| 21 { | |
| 22 } | |
| 23 } | |
| 24 */ | |
| 25 | |
| 26 GPIO_PinState HAL_I2C_Read_Data_PIN(void) | |
| 27 { | |
| 28 return HAL_GPIO_ReadPin(I2Cx_SDA_GPIO_PORT,I2Cx_SDA_PIN); | |
| 29 } | |
| 30 | |
| 31 void HAL_I2C_Send_One_CLOCK(void) | |
| 32 { | |
| 33 HAL_GPIO_WritePin(I2Cx_SCL_GPIO_PORT, I2Cx_SCL_PIN, GPIO_PIN_RESET); | |
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34 HAL_Delay(1); |
| 38 | 35 HAL_GPIO_WritePin(I2Cx_SCL_GPIO_PORT, I2Cx_SCL_PIN, GPIO_PIN_SET); |
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36 HAL_Delay(1); |
| 38 | 37 } |
| 38 | |
| 39 GPIO_PinState MX_I2C1_TestAndClear(void) | |
| 40 { | |
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41 GPIO_PinState retval; |
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42 uint8_t repeatcnt = 3; |
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43 |
| 38 | 44 I2C_DeInit(); |
| 45 HAL_I2C_ManualControl_MspInit(); | |
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46 |
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47 /* The SDA line is expected to be HIGH if no com is pending => send dummy clock signals if that is not the case */ |
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48 do |
| 38 | 49 { |
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50 for(int i=0; i<20;i++) |
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51 { |
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52 if(HAL_I2C_Read_Data_PIN() == GPIO_PIN_RESET) |
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53 HAL_I2C_Send_One_CLOCK(); |
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54 else |
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55 break; |
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56 } |
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57 retval = HAL_I2C_Read_Data_PIN(); |
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58 }while ((repeatcnt-- > 0) && (retval != GPIO_PIN_SET)); |
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59 |
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60 return retval; |
| 38 | 61 } |
| 62 | |
| 63 HAL_StatusTypeDef MX_I2C1_Init(void) | |
| 64 { | |
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65 I2cHandle.Instance = I2Cx; |
| 38 | 66 I2cHandle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT; |
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67 I2cHandle.Init.ClockSpeed = 88000; /* Reduced to avoid behavior described in errata: Mismatch on the “Setup time for a repeated Start condition” */ |
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68 I2cHandle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE; |
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69 I2cHandle.Init.DutyCycle = I2C_DUTYCYCLE_2; /* don't care if not in fast mode */ |
| 38 | 70 I2cHandle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLED; |
| 71 I2cHandle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLED; | |
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72 I2cHandle.Init.OwnAddress1 = 0x01; /* don't care because of master mode */ |
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73 |
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74 /* According to documentation setting filters before I2C initialization is recommended */ |
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75 /* HAL_I2CEx_AnalogFilter_Config(&I2cHandle, I2C_ANALOGFILTER_ENABLED); */ |
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76 HAL_I2CEx_ConfigDigitalFilter(&I2cHandle,0x0F); |
| 38 | 77 |
| 78 global.I2C_SystemStatus = HAL_I2C_Init(&I2cHandle); | |
| 100 | 79 |
| 80 if(global.dataSendToSlavePending) | |
| 81 { | |
| 82 scheduleSpecial_Evaluate_DataSendToSlave(); | |
| 83 } | |
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84 return global.I2C_SystemStatus; |
| 38 | 85 } |
| 86 | |
| 87 | |
| 88 void I2C_DeInit(void) | |
| 89 { | |
| 90 HAL_I2C_DeInit(&I2cHandle); | |
| 91 } | |
| 92 | |
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93 static uint8_t i2c_errors = 0; |
| 38 | 94 |
| 95 void I2C_Error_count(void) | |
| 96 { | |
| 97 i2c_errors++; | |
| 98 } | |
| 99 | |
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100 |
| 38 | 101 HAL_StatusTypeDef I2C_Master_Transmit( uint16_t DevAddress, uint8_t *pData, uint16_t Size) |
| 102 { | |
| 103 if(global.I2C_SystemStatus != HAL_OK) | |
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104 return global.I2C_SystemStatus; |
| 38 | 105 |
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106 global.I2C_SystemStatus = HAL_I2C_Master_Transmit(&I2cHandle, DevAddress, pData, Size, 10); |
| 38 | 107 if(global.I2C_SystemStatus != HAL_OK) |
| 108 { | |
| 109 I2C_Error_count(); | |
| 110 } | |
| 88 | 111 |
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112 return global.I2C_SystemStatus; |
| 38 | 113 } |
| 114 | |
| 115 HAL_StatusTypeDef I2C_Master_Receive( uint16_t DevAddress, uint8_t *pData, uint16_t Size) | |
| 116 { | |
| 117 if(global.I2C_SystemStatus != HAL_OK) | |
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118 return global.I2C_SystemStatus; |
| 38 | 119 |
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120 global.I2C_SystemStatus = HAL_I2C_Master_Receive(&I2cHandle, DevAddress, pData, Size, 10); |
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121 if(global.I2C_SystemStatus != HAL_OK) |
| 38 | 122 { |
| 123 I2C_Error_count(); | |
| 124 } | |
| 125 | |
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126 return global.I2C_SystemStatus; |
| 38 | 127 } |