annotate Small_CPU/Src/i2c.c @ 242:b23de15e2861 div-fixes-5

Comply to datasheet when resetting battery gauge registers According to the datasheet of the LTC2942, the adc shall be disabled when writing to the gauge registers. Simply provide a function for this and use it. And no, it does not seem to fix anything, but its simply better to follow the datasheet. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Mon, 08 Apr 2019 12:02:07 +0200
parents 2b9775f71e30
children 4fe5400567e7
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1 #include "baseCPU2.h"
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2 #include "i2c.h"
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3 #include "scheduler.h"
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4
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5 /* Private typedef -----------------------------------------------------------*/
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6 /* Private define ------------------------------------------------------------*/
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7 /* Private macro -------------------------------------------------------------*/
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10 // ===============================================================================
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11 // I2C addresses - see i2c.h
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12 // ===============================================================================
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13
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14 I2C_HandleTypeDef I2cHandle;
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17 /*
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18 static void I2C_Error_Handler(void)
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19 {
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20 while(1)
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21 {
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22 }
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23 }
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24 */
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25
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26 GPIO_PinState HAL_I2C_Read_Data_PIN(void)
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27 {
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28 return HAL_GPIO_ReadPin(I2Cx_SDA_GPIO_PORT,I2Cx_SDA_PIN);
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29 }
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31 void HAL_I2C_Send_One_CLOCK(void)
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32 {
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33 HAL_GPIO_WritePin(I2Cx_SCL_GPIO_PORT, I2Cx_SCL_PIN, GPIO_PIN_RESET);
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34 HAL_Delay(10);
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35 HAL_GPIO_WritePin(I2Cx_SCL_GPIO_PORT, I2Cx_SCL_PIN, GPIO_PIN_SET);
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36 HAL_Delay(10);
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37 }
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39 GPIO_PinState MX_I2C1_TestAndClear(void)
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40 {
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41 I2C_DeInit();
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42 HAL_I2C_ManualControl_MspInit();
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43 for(int i=0; i<9;i++)
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44 {
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45 if(HAL_I2C_Read_Data_PIN() == GPIO_PIN_RESET)
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46 HAL_I2C_Send_One_CLOCK();
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47 else
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48 break;
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49 }
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50 return HAL_I2C_Read_Data_PIN();
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51 }
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53 HAL_StatusTypeDef MX_I2C1_Init(void)
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54 {
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55 I2cHandle.Instance = I2Cx;
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56 I2cHandle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
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57 I2cHandle.Init.ClockSpeed = 100000;//400000; REDUCED for compatibility with HMC5583L + MMA8452Q
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58 I2cHandle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLED;
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59 I2cHandle.Init.DutyCycle = I2C_DUTYCYCLE_2;
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60 I2cHandle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLED;
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61 I2cHandle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLED;
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62 I2cHandle.Init.OwnAddress1 = 0x01;
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63
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64 global.I2C_SystemStatus = HAL_I2C_Init(&I2cHandle);
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65 HAL_I2CEx_AnalogFilter_Config(&I2cHandle, I2C_ANALOGFILTER_ENABLED);
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66 HAL_I2CEx_ConfigDigitalFilter(&I2cHandle,0x0F);
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67
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68 if(global.dataSendToSlavePending)
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69 {
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70 scheduleSpecial_Evaluate_DataSendToSlave();
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71 }
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72 return global.I2C_SystemStatus;
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73 }
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76 void I2C_DeInit(void)
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77 {
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78 HAL_I2C_DeInit(&I2cHandle);
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79 }
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80
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81 static uint8_t i2c_errors = 0;
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83 void I2C_Error_count(void)
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84 {
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85 i2c_errors++;
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86 }
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87
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88 HAL_StatusTypeDef I2C_Master_Transmit( uint16_t DevAddress, uint8_t *pData, uint16_t Size)
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89 {
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90 if(global.I2C_SystemStatus != HAL_OK)
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91 return global.I2C_SystemStatus;
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92
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93 global.I2C_SystemStatus = HAL_I2C_Master_Transmit(&I2cHandle, DevAddress, pData, Size, 2);
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94 if(global.I2C_SystemStatus != HAL_OK)
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95 {
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96 I2C_Error_count();
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97 }
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99 return global.I2C_SystemStatus;
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100 }
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101
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102 HAL_StatusTypeDef I2C_Master_Receive( uint16_t DevAddress, uint8_t *pData, uint16_t Size)
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103 {
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104 if(global.I2C_SystemStatus != HAL_OK)
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105 return global.I2C_SystemStatus;
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106
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107 global.I2C_SystemStatus = HAL_I2C_Master_Receive(&I2cHandle, DevAddress, pData, Size, 10);
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108 if(global.I2C_SystemStatus != HAL_OK)
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109 {
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110 I2C_Error_count();
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111 }
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112
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113 return global.I2C_SystemStatus;
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114 }