Mercurial > public > ostc4
annotate Small_CPU/Src/i2c.c @ 777:6a8cf91e5b22
This is only showing if one of the compass views is visible. It should make it possible to verify that a correct heading is set as the user can see the compass readout when pushing the button. (mikeller)
author | heinrichsweikamp |
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date | Mon, 22 May 2023 09:14:27 +0200 |
parents | 4fe5400567e7 |
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rev | line source |
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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 } |