| Line | Branch | Decision | Exec | Source |
|---|---|---|---|---|
| 1 | /** | |||
| 2 | * this file is mostly about SEFMJ early 2000s specific honda K-line protocol | |||
| 3 | * https://rusefi.com/forum/viewtopic.php?f=4&t=2514 | |||
| 4 | */ | |||
| 5 | ||||
| 6 | #include "pch.h" | |||
| 7 | #include "kline.h" | |||
| 8 | #include "hellen_meta.h" | |||
| 9 | #include "crc8hondak.h" | |||
| 10 | ||||
| 11 | 1 | size_t readWhileGives(ByteSource source, uint8_t *buffer, size_t bufferSize) { | ||
| 12 | 1 | size_t totalBytes = 0; | ||
| 13 |
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12 | while (totalBytes < bufferSize) { |
| 14 | 12 | size_t readThisTime = source(&buffer[totalBytes], bufferSize - totalBytes); | ||
| 15 |
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12 | if (readThisTime == 0) { |
| 16 | // looks like idle gap | |||
| 17 | 1 | break; | ||
| 18 | } | |||
| 19 | 11 | totalBytes += readThisTime; | ||
| 20 | } | |||
| 21 | 1 | return totalBytes; | ||
| 22 | } | |||
| 23 | ||||
| 24 | #ifdef EFI_KLINE | |||
| 25 | ||||
| 26 | static uint8_t kvalues[8]; | |||
| 27 | ||||
| 28 | #define HONDA_K_BCM_STATUS_NIBBLE 0x0 | |||
| 29 | #define HONDA_K_BCM_REQ_NIBBLE 0x1 | |||
| 30 | ||||
| 31 | bool kAcRequestState; | |||
| 32 | ||||
| 33 | static void handleHonda(uint8_t *bufferIn) { | |||
| 34 | ||||
| 35 | // no headlights 0x40, with headlights 0x60 | |||
| 36 | uint8_t statusByte1 = bufferIn[1]; | |||
| 37 | // no cabin blower 0x06, with blower 0x86 | |||
| 38 | uint8_t statusByte2 = bufferIn[2]; | |||
| 39 | kAcRequestState = statusByte2 & 0x80; | |||
| 40 | if (engineConfiguration->verboseKLine) { | |||
| 41 | efiPrintf("honda status packet with 0x%02x 0x%02x state %d", statusByte1, statusByte2, kAcRequestState); | |||
| 42 | } | |||
| 43 | } | |||
| 44 | ||||
| 45 | static SerialDriver* const klDriver = &KLINE_SERIAL_DEVICE; | |||
| 46 | static THD_WORKING_AREA(klThreadStack, UTILITY_THREAD_STACK_SIZE); | |||
| 47 | ||||
| 48 | static int totalBytes = 0; | |||
| 49 | ||||
| 50 | void kLineThread(void*) { | |||
| 51 | // due to single wire we read everything we've transmitted | |||
| 52 | bool ignoreRecentTransmit = false; | |||
| 53 | int sendCounter = 0; | |||
| 54 | while (1) { | |||
| 55 | ||||
| 56 | /** | |||
| 57 | * under the hood there is SERIAL_BUFFERS_SIZE which we hope to help us | |||
| 58 | */ | |||
| 59 | ||||
| 60 | uint8_t bufferIn[16]; | |||
| 61 | // a bit of a busy read open question if this would affect performance? | |||
| 62 | // on 2003 Honda for instance the bus seems to be 70%-ish busy. 9600 baud is 1.04ms per byte, a bit below 1kHz | |||
| 63 | ByteSource serialSource = [] (uint8_t * buffer, int maxSize) { | |||
| 64 | return chnReadTimeout(klDriver,buffer, maxSize, TIME_US2I(engineConfiguration->kLinePeriodUs)); | |||
| 65 | }; | |||
| 66 | size_t len = readWhileGives(serialSource, bufferIn, sizeof(bufferIn)); | |||
| 67 | ||||
| 68 | if (engineConfiguration->verboseKLine) { | |||
| 69 | // efiPrintf("ignoreRecentTransmit %d", ignoreRecentTransmit); | |||
| 70 | } | |||
| 71 | ||||
| 72 | // to begin with just write byte to console | |||
| 73 | if (len > 0) { | |||
| 74 | if (engineConfiguration->verboseKLine) { | |||
| 75 | efiPrintf("kline: got count 0x%02x", len); | |||
| 76 | } | |||
| 77 | for (size_t i =0;i<len;i++) { | |||
| 78 | if (engineConfiguration->verboseKLine) { | |||
| 79 | efiPrintf("kline: got 0x%02x", bufferIn[i]); | |||
| 80 | } | |||
| 81 | totalBytes++; | |||
| 82 | } | |||
| 83 | if (len > 1) { | |||
| 84 | int crc = crc_hondak_calc(bufferIn, len - 1); | |||
| 85 | uint8_t low = bufferIn[0] & 0xF; | |||
| 86 | if (crc == bufferIn[len - 1]) { | |||
| 87 | if (engineConfiguration->verboseKLine) { | |||
| 88 | efiPrintf("happy CRC 0x%02x", crc); | |||
| 89 | } | |||
| 90 | if (low == HONDA_K_BCM_STATUS_NIBBLE) { | |||
| 91 | handleHonda(bufferIn); | |||
| 92 | } | |||
| 93 | ||||
| 94 | if (low == HONDA_K_BCM_REQ_NIBBLE) { | |||
| 95 | if (engineConfiguration->verboseKLine) { | |||
| 96 | efiPrintf("BCM request 0x%02x", bufferIn[0]); | |||
| 97 | } | |||
| 98 | } | |||
| 99 | ||||
| 100 | } else if (low == HONDA_K_BCM_STATUS_NIBBLE && bufferIn[4] == crc_hondak_calc(bufferIn, 4)) { | |||
| 101 | if (engineConfiguration->verboseKLine) { | |||
| 102 | efiPrintf("hack for now, happy CRC 0x%02x", crc); | |||
| 103 | } | |||
| 104 | handleHonda(bufferIn); | |||
| 105 | } | |||
| 106 | ||||
| 107 | ||||
| 108 | if (engineConfiguration->kLineDoHondaSend && !ignoreRecentTransmit) { | |||
| 109 | sendCounter++; | |||
| 110 | #define OUT_SIZE 6 | |||
| 111 | // const uint8_t out2[] = {0x2, 0x0, 0x0, 0x50, 0x0, 0x0}; | |||
| 112 | //static_assert(sizeof(out2) == OUT_SIZE); | |||
| 113 | // const uint8_t outB[] = {0x42, 0x0, 0x0, 0x50, 0x0, 0x0}; | |||
| 114 | // static_assert(sizeof(outB) == OUT_SIZE); | |||
| 115 | //const uint8_t *out = (sendCounter % 3 == 0) ? outB : out2; | |||
| 116 | // const uint8_t *out = out2; | |||
| 117 | ||||
| 118 | if (sendCounter % 30 == 0) { | |||
| 119 | // no idea what this, maybe "i am running"? | |||
| 120 | kvalues[0] = 0x82; | |||
| 121 | kvalues[2] = 0x10; | |||
| 122 | } else { | |||
| 123 | kvalues[0] = 0x2; | |||
| 124 | kvalues[2] = 0; | |||
| 125 | } | |||
| 126 | ||||
| 127 | if (engineConfiguration->verboseKLine) { | |||
| 128 | efiPrintf("kline doSend"); | |||
| 129 | } | |||
| 130 | int positiveCltWithHighishValueInCaseOfSensorIssue = maxI(1, | |||
| 131 | #ifdef HW_HELLEN_HONDA | |||
| 132 | /* temporary while we are playing with calibration */ | |||
| 133 | config->hondaKcltGaugeAdder | |||
| 134 | #else | |||
| 135 | 50 | |||
| 136 | #endif | |||
| 137 | + Sensor::get(SensorType::Clt).value_or(140) | |||
| 138 | ); | |||
| 139 | // 125 about horizontal | |||
| 140 | // 162 points at red mark, looks like gauge has hysteresis? | |||
| 141 | // value 200 way above red mark | |||
| 142 | kvalues[3] = positiveCltWithHighishValueInCaseOfSensorIssue; | |||
| 143 | ||||
| 144 | chnWrite(klDriver, (const uint8_t *)kvalues, OUT_SIZE); | |||
| 145 | crc = crc_hondak_calc(kvalues, OUT_SIZE); | |||
| 146 | chnWrite(klDriver, (const uint8_t *)&crc, 1); | |||
| 147 | ignoreRecentTransmit = true; | |||
| 148 | } else { | |||
| 149 | ignoreRecentTransmit = false; | |||
| 150 | } | |||
| 151 | } | |||
| 152 | } | |||
| 153 | } | |||
| 154 | } | |||
| 155 | #endif // EFI_KLINE | |||
| 156 | ||||
| 157 | 219 | void startKLine() { | ||
| 158 | #ifdef EFI_KLINE | |||
| 159 | if (!engineConfiguration->enableKline) { | |||
| 160 | return; | |||
| 161 | } | |||
| 162 | #if EFI_PROD_CODE | |||
| 163 | efiSetPadMode("K-Line UART RX", Gpio::KLINE_SERIAL_DEVICE_RX, PAL_MODE_ALTERNATE(TS_SERIAL_AF)); | |||
| 164 | efiSetPadMode("K-Line UART TX", Gpio::KLINE_SERIAL_DEVICE_TX, PAL_MODE_ALTERNATE(TS_SERIAL_AF)); | |||
| 165 | #endif /* EFI_PROD_CODE */ | |||
| 166 | ||||
| 167 | static SerialConfig cfg = { | |||
| 168 | #if EFI_PROD_CODE | |||
| 169 | .speed = 0, | |||
| 170 | .cr1 = 0, | |||
| 171 | .cr2 = USART_CR2_STOP1_BITS | USART_CR2_LINEN, | |||
| 172 | .cr3 = 0 | |||
| 173 | #endif // EFI_PROD_CODE | |||
| 174 | }; | |||
| 175 | ||||
| 176 | if (engineConfiguration->kLineBaudRate < 100) | |||
| 177 | engineConfiguration->kLineBaudRate = KLINE_BAUD_RATE; | |||
| 178 | cfg.speed = engineConfiguration->kLineBaudRate; | |||
| 179 | ||||
| 180 | sdStart(klDriver, &cfg); | |||
| 181 | #endif // EFI_KLINE | |||
| 182 | 219 | } | ||
| 183 | ||||
| 184 | 219 | void stopKLine() { | ||
| 185 | #ifdef EFI_KLINE | |||
| 186 | #if EFI_PROD_CODE | |||
| 187 | if (activeConfiguration.enableKline) { | |||
| 188 | efiSetPadUnused(Gpio::KLINE_SERIAL_DEVICE_RX); | |||
| 189 | efiSetPadUnused(Gpio::KLINE_SERIAL_DEVICE_TX); | |||
| 190 | ||||
| 191 | sdStop(klDriver); | |||
| 192 | } | |||
| 193 | ||||
| 194 | #endif /* EFI_PROD_CODE */ | |||
| 195 | #endif // EFI_KLINE | |||
| 196 | 219 | } | ||
| 197 | ||||
| 198 | 583 | void initKLine() { | ||
| 199 |
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583 | if (!engineConfiguration->enableKline) { |
| 200 | 583 | return; | ||
| 201 | } | |||
| 202 | #ifdef EFI_KLINE | |||
| 203 | startKLine(); | |||
| 204 | ||||
| 205 | memset(kvalues, 0, sizeof(kvalues)); | |||
| 206 | kvalues[0] = 0x2; | |||
| 207 | ||||
| 208 | chThdCreateStatic(klThreadStack, sizeof(klThreadStack), NORMALPRIO + 1, kLineThread, nullptr); | |||
| 209 | addConsoleAction("kline", [](){ | |||
| 210 | efiPrintf("kline totalBytes %d", totalBytes); | |||
| 211 | }); | |||
| 212 | addConsoleAction("klineyes", [](){ | |||
| 213 | engineConfiguration->kLineDoHondaSend = true; | |||
| 214 | efiPrintf("kline send %d", engineConfiguration->kLineDoHondaSend); | |||
| 215 | }); | |||
| 216 | addConsoleAction("klineno", [](){ | |||
| 217 | engineConfiguration->kLineDoHondaSend = false; | |||
| 218 | efiPrintf("kline send %d", engineConfiguration->kLineDoHondaSend); | |||
| 219 | }); | |||
| 220 | addConsoleActionII("temp_k", [](int index, int value) { | |||
| 221 | kvalues[index] = value; | |||
| 222 | }); | |||
| 223 | ||||
| 224 | #endif // EFI_KLINE | |||
| 225 | } | |||
| 226 |