Mercurial > public > ostc4
annotate Small_CPU/Src/i2c.c @ 935:f2494a708f52 Evo_2_23
Added unit files for GPIO:
The new gpios need to be accessed from severall units. That's why the current, static implementation in the baseCPU did not fit. To enable global usage of the function they have been moved into new source / header file
| author | Ideenmodellierer |
|---|---|
| date | Sun, 08 Dec 2024 21:59:22 +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 } |