Mercurial > public > ostc4
annotate Small_CPU/Src/i2c.c @ 322:31e471d60797 O2_SensorSync
Added start of frame detection for HUD data
In the previous impmenentation the reception and evaluation of 15 byte were used without start detection. As a result sensor data could be stuck in case the frame sequence does not match the structure (e.g. cause by an framing error).
To resolve this in case of an invalid checksumme in combination with a data lost detection a byte based reception is startet to detect the start of a frame using the break between two transmissions.
In addition a babbling idiot protecting has been added because a faulty hardware could have an impact on the OSTC operation (high interrupt load)
| author | ideenmodellierer |
|---|---|
| date | Sun, 30 Jun 2019 21:25:58 +0200 |
| parents | 2b9775f71e30 |
| children | 4fe5400567e7 |
| 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); | |
| 34 HAL_Delay(10); | |
| 35 HAL_GPIO_WritePin(I2Cx_SCL_GPIO_PORT, I2Cx_SCL_PIN, GPIO_PIN_SET); | |
| 36 HAL_Delay(10); | |
| 37 } | |
| 38 | |
| 39 GPIO_PinState MX_I2C1_TestAndClear(void) | |
| 40 { | |
| 41 I2C_DeInit(); | |
| 42 HAL_I2C_ManualControl_MspInit(); | |
| 43 for(int i=0; i<9;i++) | |
| 44 { | |
| 45 if(HAL_I2C_Read_Data_PIN() == GPIO_PIN_RESET) | |
| 46 HAL_I2C_Send_One_CLOCK(); | |
| 47 else | |
| 48 break; | |
| 49 } | |
| 50 return HAL_I2C_Read_Data_PIN(); | |
| 51 } | |
| 52 | |
| 53 HAL_StatusTypeDef MX_I2C1_Init(void) | |
| 54 { | |
| 55 I2cHandle.Instance = I2Cx; | |
| 56 I2cHandle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT; | |
| 104 | 57 I2cHandle.Init.ClockSpeed = 100000;//400000; REDUCED for compatibility with HMC5583L + MMA8452Q |
| 38 | 58 I2cHandle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLED; |
| 104 | 59 I2cHandle.Init.DutyCycle = I2C_DUTYCYCLE_2; |
| 38 | 60 I2cHandle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLED; |
| 61 I2cHandle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLED; | |
| 62 I2cHandle.Init.OwnAddress1 = 0x01; | |
| 63 | |
| 64 global.I2C_SystemStatus = HAL_I2C_Init(&I2cHandle); | |
| 82 | 65 HAL_I2CEx_AnalogFilter_Config(&I2cHandle, I2C_ANALOGFILTER_ENABLED); |
| 100 | 66 HAL_I2CEx_ConfigDigitalFilter(&I2cHandle,0x0F); |
| 67 | |
| 68 if(global.dataSendToSlavePending) | |
| 69 { | |
| 70 scheduleSpecial_Evaluate_DataSendToSlave(); | |
| 71 } | |
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cleanup: factor out I2C1_Status() and cleanup type
Jan Mulder <jlmulder@xs4all.nl>
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72 return global.I2C_SystemStatus; |
| 38 | 73 } |
| 74 | |
| 75 | |
| 76 void I2C_DeInit(void) | |
| 77 { | |
| 78 HAL_I2C_DeInit(&I2cHandle); | |
| 79 } | |
| 80 | |
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cleanup: factor out dataSendToSlaveStopEval
Jan Mulder <jlmulder@xs4all.nl>
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81 static uint8_t i2c_errors = 0; |
| 38 | 82 |
| 83 void I2C_Error_count(void) | |
| 84 { | |
| 85 i2c_errors++; | |
| 86 } | |
| 87 | |
| 88 HAL_StatusTypeDef I2C_Master_Transmit( uint16_t DevAddress, uint8_t *pData, uint16_t Size) | |
| 89 { | |
| 90 if(global.I2C_SystemStatus != HAL_OK) | |
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238
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cleanup, bugfix: do not mask I2C_SystemStatus with local variable
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91 return global.I2C_SystemStatus; |
| 38 | 92 |
| 182 | 93 global.I2C_SystemStatus = HAL_I2C_Master_Transmit(&I2cHandle, DevAddress, pData, Size, 2); |
| 38 | 94 if(global.I2C_SystemStatus != HAL_OK) |
| 95 { | |
| 96 I2C_Error_count(); | |
| 97 } | |
| 88 | 98 |
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241
2b9775f71e30
cleanup: factor out I2C1_Status() and cleanup type
Jan Mulder <jlmulder@xs4all.nl>
parents:
239
diff
changeset
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99 return global.I2C_SystemStatus; |
| 38 | 100 } |
| 101 | |
| 102 HAL_StatusTypeDef I2C_Master_Receive( uint16_t DevAddress, uint8_t *pData, uint16_t Size) | |
| 103 { | |
| 104 if(global.I2C_SystemStatus != HAL_OK) | |
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238
a9d798e8c11f
cleanup, bugfix: do not mask I2C_SystemStatus with local variable
Jan Mulder <jlmulder@xs4all.nl>
parents:
182
diff
changeset
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105 return global.I2C_SystemStatus; |
| 38 | 106 |
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238
a9d798e8c11f
cleanup, bugfix: do not mask I2C_SystemStatus with local variable
Jan Mulder <jlmulder@xs4all.nl>
parents:
182
diff
changeset
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107 global.I2C_SystemStatus = HAL_I2C_Master_Receive(&I2cHandle, DevAddress, pData, Size, 10); |
|
a9d798e8c11f
cleanup, bugfix: do not mask I2C_SystemStatus with local variable
Jan Mulder <jlmulder@xs4all.nl>
parents:
182
diff
changeset
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108 if(global.I2C_SystemStatus != HAL_OK) |
| 38 | 109 { |
| 110 I2C_Error_count(); | |
| 111 } | |
| 112 | |
|
238
a9d798e8c11f
cleanup, bugfix: do not mask I2C_SystemStatus with local variable
Jan Mulder <jlmulder@xs4all.nl>
parents:
182
diff
changeset
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113 return global.I2C_SystemStatus; |
| 38 | 114 } |