Mercurial > public > ostc4
annotate Small_CPU/Src/i2c.c @ 667:8c3d495afc69 Betatest
Increased version number
| author | Ideenmodellierer |
|---|---|
| date | Sat, 12 Mar 2022 22:42:56 +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 | |
|
165
e9cce686fe41
Minor: Some documentation for new hardware
heinrichsweikamp
parents:
104
diff
changeset
|
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); | |
|
328
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
34 HAL_Delay(1); |
| 38 | 35 HAL_GPIO_WritePin(I2Cx_SCL_GPIO_PORT, I2Cx_SCL_PIN, GPIO_PIN_SET); |
|
328
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
36 HAL_Delay(1); |
| 38 | 37 } |
| 38 | |
| 39 GPIO_PinState MX_I2C1_TestAndClear(void) | |
| 40 { | |
|
328
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
41 GPIO_PinState retval; |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
42 uint8_t repeatcnt = 3; |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
43 |
| 38 | 44 I2C_DeInit(); |
| 45 HAL_I2C_ManualControl_MspInit(); | |
|
328
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
46 |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
47 /* The SDA line is expected to be HIGH if no com is pending => send dummy clock signals if that is not the case */ |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
48 do |
| 38 | 49 { |
|
328
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
50 for(int i=0; i<20;i++) |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
51 { |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
52 if(HAL_I2C_Read_Data_PIN() == GPIO_PIN_RESET) |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
53 HAL_I2C_Send_One_CLOCK(); |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
54 else |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
55 break; |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
56 } |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
57 retval = HAL_I2C_Read_Data_PIN(); |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
58 }while ((repeatcnt-- > 0) && (retval != GPIO_PIN_SET)); |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
59 |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
60 return retval; |
| 38 | 61 } |
| 62 | |
| 63 HAL_StatusTypeDef MX_I2C1_Init(void) | |
| 64 { | |
|
328
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
65 I2cHandle.Instance = I2Cx; |
| 38 | 66 I2cHandle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT; |
|
328
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
67 I2cHandle.Init.ClockSpeed = 88000; /* Reduced to avoid behavior described in errata: Mismatch on the “Setup time for a repeated Start condition” */ |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
68 I2cHandle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE; |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
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; | |
|
328
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
72 I2cHandle.Init.OwnAddress1 = 0x01; /* don't care because of master mode */ |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
73 |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
74 /* According to documentation setting filters before I2C initialization is recommended */ |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
75 /* HAL_I2CEx_AnalogFilter_Config(&I2cHandle, I2C_ANALOGFILTER_ENABLED); */ |
|
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
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 } | |
|
241
2b9775f71e30
cleanup: factor out I2C1_Status() and cleanup type
Jan Mulder <jlmulder@xs4all.nl>
parents:
239
diff
changeset
|
84 return global.I2C_SystemStatus; |
| 38 | 85 } |
| 86 | |
| 87 | |
| 88 void I2C_DeInit(void) | |
| 89 { | |
| 90 HAL_I2C_DeInit(&I2cHandle); | |
| 91 } | |
| 92 | |
|
239
e4207f0aaa4b
cleanup: factor out dataSendToSlaveStopEval
Jan Mulder <jlmulder@xs4all.nl>
parents:
238
diff
changeset
|
93 static uint8_t i2c_errors = 0; |
| 38 | 94 |
| 95 void I2C_Error_count(void) | |
| 96 { | |
| 97 i2c_errors++; | |
| 98 } | |
| 99 | |
|
328
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
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) | |
|
238
a9d798e8c11f
cleanup, bugfix: do not mask I2C_SystemStatus with local variable
Jan Mulder <jlmulder@xs4all.nl>
parents:
182
diff
changeset
|
104 return global.I2C_SystemStatus; |
| 38 | 105 |
|
328
4fe5400567e7
Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery
ideenmodellierer
parents:
241
diff
changeset
|
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 |
|
241
2b9775f71e30
cleanup: factor out I2C1_Status() and cleanup type
Jan Mulder <jlmulder@xs4all.nl>
parents:
239
diff
changeset
|
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) | |
|
238
a9d798e8c11f
cleanup, bugfix: do not mask I2C_SystemStatus with local variable
Jan Mulder <jlmulder@xs4all.nl>
parents:
182
diff
changeset
|
118 return global.I2C_SystemStatus; |
| 38 | 119 |
|
238
a9d798e8c11f
cleanup, bugfix: do not mask I2C_SystemStatus with local variable
Jan Mulder <jlmulder@xs4all.nl>
parents:
182
diff
changeset
|
120 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
|
121 if(global.I2C_SystemStatus != HAL_OK) |
| 38 | 122 { |
| 123 I2C_Error_count(); | |
| 124 } | |
| 125 | |
|
238
a9d798e8c11f
cleanup, bugfix: do not mask I2C_SystemStatus with local variable
Jan Mulder <jlmulder@xs4all.nl>
parents:
182
diff
changeset
|
126 return global.I2C_SystemStatus; |
| 38 | 127 } |