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annotate Small_CPU/Src/uart.c @ 874:fbb6f8f41e0a Evo_2_23

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minor
author heinrichsweikamp
date Wed, 14 Aug 2024 16:50:55 +0200
parents ad96f99ebc78
children cf3967fe6924
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1 /**
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2 ******************************************************************************
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3 * @file uart.c
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4 * @author heinrichs weikamp gmbh
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5 * @version V0.0.1
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6 * @date 27-March-2014
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7 * @brief button control
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8 *
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9 @verbatim
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10 ==============================================================================
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11 ##### How to use #####
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12 ==============================================================================
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13 @endverbatim
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14 ******************************************************************************
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15 * @attention
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16 *
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17 * <h2><center>&copy; COPYRIGHT(c) 2015 heinrichs weikamp</center></h2>
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18 *
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19 ******************************************************************************
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20 */
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21 /* Includes ------------------------------------------------------------------*/
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22 #include "uart.h"
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23 #include "uartProtocol_O2.h"
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24 #include "uartProtocol_Co2.h"
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25 #include "uartProtocol_Sentinel.h"
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26 #include "externalInterface.h"
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27 #include "data_exchange.h"
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28 #include <string.h> /* memset */
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29
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30 /* Private variables ---------------------------------------------------------*/
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31
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33
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34 #define CHUNK_SIZE (25u) /* the DMA will handle chunk size transfers */
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35 #define CHUNKS_PER_BUFFER (5u)
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36
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37 UART_HandleTypeDef huart1;
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38
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39 DMA_HandleTypeDef hdma_usart1_rx;
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40
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41 uint8_t rxBuffer[CHUNK_SIZE * CHUNKS_PER_BUFFER]; /* The complete buffer has a X * chunk size to allow fariations in buffer read time */
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42 static uint8_t rxWriteIndex; /* Index of the data item which is analysed */
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43 static uint8_t rxReadIndex; /* Index at which new data is stared */
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44 static uint8_t lastCmdIndex; /* Index of last command which has not been completly received */
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45 static uint8_t dmaActive; /* Indicator if DMA reception needs to be started */
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48 /* Exported functions --------------------------------------------------------*/
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49
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50
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51 void MX_USART1_UART_Init(void)
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52 {
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53 /* regular init */
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54
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55 huart1.Instance = USART1;
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56 huart1.Init.BaudRate = 19200;
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57 huart1.Init.WordLength = UART_WORDLENGTH_8B;
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58 huart1.Init.StopBits = UART_STOPBITS_1;
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59 huart1.Init.Parity = UART_PARITY_NONE;
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60 huart1.Init.Mode = UART_MODE_TX_RX;
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61 huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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62 huart1.Init.OverSampling = UART_OVERSAMPLING_16;
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63
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64 HAL_UART_Init(&huart1);
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65
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66 MX_USART1_DMA_Init();
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67
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68 memset(rxBuffer,BUFFER_NODATA,sizeof(rxBuffer));
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69 rxReadIndex = 0;
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70 lastCmdIndex = 0;
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71 rxWriteIndex = 0;
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72 dmaActive = 0;
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73 }
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74
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75 void MX_USART1_UART_DeInit(void)
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76 {
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77 HAL_DMA_Abort(&hdma_usart1_rx);
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78 HAL_DMA_DeInit(&hdma_usart1_rx);
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79 HAL_UART_DeInit(&huart1);
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80 dmaActive = 0;
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81 }
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82
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83 void MX_USART1_DMA_Init()
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84 {
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85 /* DMA controller clock enable */
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86 __DMA2_CLK_ENABLE();
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87
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88 /* Peripheral DMA init*/
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89 hdma_usart1_rx.Instance = DMA2_Stream5;
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90 hdma_usart1_rx.Init.Channel = DMA_CHANNEL_4;
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91 hdma_usart1_rx.Init.Direction = DMA_PERIPH_TO_MEMORY; //DMA_MEMORY_TO_PERIPH;
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92 hdma_usart1_rx.Init.PeriphInc = DMA_PINC_DISABLE;
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93 hdma_usart1_rx.Init.MemInc = DMA_MINC_ENABLE;
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94 hdma_usart1_rx.Init.PeriphDataAlignment = DMA_MDATAALIGN_BYTE;
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95 hdma_usart1_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
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96 hdma_usart1_rx.Init.Mode = DMA_NORMAL;
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97 hdma_usart1_rx.Init.Priority = DMA_PRIORITY_LOW;
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98 hdma_usart1_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
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99 HAL_DMA_Init(&hdma_usart1_rx);
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100
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101 __HAL_LINKDMA(&huart1,hdmarx,hdma_usart1_rx);
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102
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103 /* DMA interrupt init */
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104 HAL_NVIC_SetPriority(DMA2_Stream5_IRQn, 0, 0);
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105 HAL_NVIC_EnableIRQ(DMA2_Stream5_IRQn);
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106 }
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107
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108 void UART_MUX_SelectAddress(uint8_t muxAddress)
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109 {
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110 uint8_t indexstr[4];
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111
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112 if(muxAddress <= MAX_MUX_CHANNEL)
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113 {
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114 indexstr[0] = '~';
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115 indexstr[1] = muxAddress;
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116 indexstr[2] = 0x0D;
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117 indexstr[3] = 0x0A;
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118
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119 HAL_UART_Transmit(&huart1,indexstr,4,10);
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120 }
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121 }
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122
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123
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124 void UART_SendCmdString(uint8_t *cmdString)
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125 {
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126 uint8_t cmdLength = strlen((char*)cmdString);
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127
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128 if(cmdLength < 20) /* A longer string is an indication for a missing 0 termination */
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129 {
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130 if(dmaActive == 0)
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131 {
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132 UART_StartDMA_Receiption();
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133 }
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134 HAL_UART_Transmit(&huart1,cmdString,cmdLength,10);
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135 }
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136 }
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137
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138
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139 void StringToInt(char *pstr, uint32_t *puInt32)
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140 {
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141 uint8_t index = 0;
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142 uint32_t result = 0;
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143 while((pstr[index] >= '0') && (pstr[index] <= '9'))
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144 {
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145 result *=10;
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146 result += pstr[index] - '0';
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147 index++;
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148 }
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149 *puInt32 = result;
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150 }
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151
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152 void StringToUInt64(char *pstr, uint64_t *puint64)
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153 {
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154 uint8_t index = 0;
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155 uint64_t result = 0;
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156 while((pstr[index] >= '0') && (pstr[index] <= '9'))
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157 {
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158 result *=10;
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159 result += pstr[index] - '0';
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160 index++;
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161 }
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162 *puint64 = result;
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163 }
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164
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165 void UART_StartDMA_Receiption()
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166 {
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167 if(dmaActive == 0)
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168 {
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169 if(HAL_OK == HAL_UART_Receive_DMA (&huart1, &rxBuffer[rxWriteIndex], CHUNK_SIZE))
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170 {
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171 dmaActive = 1;
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172 }
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173 }
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174 }
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175
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176 void UART_ChangeBaudrate(uint32_t newBaudrate)
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177 {
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178 uint8_t dmaWasActive = dmaActive;
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179 // HAL_DMA_Abort(&hdma_usart1_rx);
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180 MX_USART1_UART_DeInit();
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181 //HAL_UART_Abort(&huart1);
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182 //HAL_DMA_DeInit(&hdma_usart1_rx);
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183
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184
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185 // huart1.Instance->BRR = UART_BRR_SAMPLING8(HAL_RCC_GetPCLK2Freq()/2, newBaudrate);
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186 huart1.Init.BaudRate = newBaudrate;
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187 HAL_UART_Init(&huart1);
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188 MX_USART1_DMA_Init();
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189 if(dmaWasActive)
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190 {
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191 memset(rxBuffer,BUFFER_NODATA,sizeof(rxBuffer));
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192 rxReadIndex = 0;
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193 rxWriteIndex = 0;
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194 dmaActive = 0;
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195 UART_StartDMA_Receiption();
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196 }
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197 }
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198
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199 void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
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200 {
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201 if(huart == &huart1)
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202 {
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203 dmaActive = 0;
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204 rxWriteIndex+=CHUNK_SIZE;
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205 if(rxWriteIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER)
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206 {
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207 rxWriteIndex = 0;
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208 }
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209 if((rxWriteIndex / CHUNK_SIZE) != (rxReadIndex / CHUNK_SIZE) || (rxWriteIndex == rxReadIndex)) /* start next transfer if we did not catch up with read index */
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210 {
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211 UART_StartDMA_Receiption();
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212 }
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213 }
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214 }
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215
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216 void UART_ReadData(uint8_t sensorType)
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217 {
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218 uint8_t localRX = rxReadIndex;
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219
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220 while((rxBuffer[localRX]!=BUFFER_NODATA))
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221 {
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222 switch (sensorType)
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223 {
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224 case SENSOR_MUX:
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225 case SENSOR_DIGO2: uartO2_ProcessData(rxBuffer[localRX]);
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226 break;
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227 #ifdef ENABLE_CO2_SUPPORT
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228 case SENSOR_CO2: uartCo2_ProcessData(rxBuffer[localRX]);
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229 break;
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230 #endif
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231 #ifdef ENABLE_SENTINEL_MODE
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232 case SENSOR_SENTINEL: uartSentinel_ProcessData(rxBuffer[localRX]);
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233 break;
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234 #endif
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235 default:
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236 break;
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237 }
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238
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239 rxBuffer[localRX] = BUFFER_NODATA;
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240 localRX++;
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241 rxReadIndex++;
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242 if(rxReadIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER)
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243 {
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244 localRX = 0;
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245 rxReadIndex = 0;
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246 }
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247 }
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248 }
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249
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250 void UART_FlushRxBuffer(void)
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251 {
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252 while(rxBuffer[rxReadIndex] != BUFFER_NODATA)
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253 {
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254 rxBuffer[rxReadIndex] = BUFFER_NODATA;
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255 rxReadIndex++;
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256 if(rxReadIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER)
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257 {
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258 rxReadIndex = 0;
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259 }
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260 }
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261 }
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262
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263 uint8_t UART_isComActive(uint8_t sensorId)
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264 {
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265 uint8_t active = 1;
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266
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267 uint8_t ComState = externalInterface_GetSensorState(sensorId + EXT_INTERFACE_MUX_OFFSET);
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268
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269 if((ComState == UART_COMMON_INIT) || (ComState == UART_COMMON_IDLE) || (ComState == UART_COMMON_ERROR))
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270 {
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271 active = 0;
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272 }
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273 return active;
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274 }
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275
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276 /************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/