serial_hw.cpp

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/**
 * @file    serial_hw.cpp
 * @brief   SERIAL bus low level code
 *
 * @date Apr 17, 2020
 * @author Konstantin Smola, (c) 2020
 */
 
#include "pch.h"
 
#if EFI_AUX_SERIAL
 
#include "serial.h"
#include "serial_hw.h"
#include "string.h"
#include "mpu_util.h"
 
static bool isSerialEnabled = false;
static bool isSerialTXEnabled = false;
static bool isSerialRXEnabled = false;
 
static SerialConfig uartCfg;
static SerialRead serialRead;
 
static void auxInfo() {
    if (!isSerialEnabled) {
        efiPrintf("AUX Serial is not enabled, please enable & restart");
        return;
    }
 
    efiPrintf("AUX Serial TX %s", hwPortname(engineConfiguration->auxSerialTxPin));
    efiPrintf("AUX Serial RX %s", hwPortname(engineConfiguration->auxSerialRxPin));
}
 
void enableAuxSerial() {
    uartCfg.speed = engineConfiguration->auxSerialSpeed;
    sdStart(AUX_SERIAL_DEVICE, &uartCfg);
 
    efiPrintf("AUX Serial started");
}
 
void stopAuxSerialPins() {
    efiSetPadUnused(activeConfiguration.auxSerialTxPin);
    efiSetPadUnused(activeConfiguration.auxSerialRxPin);
}
 
void startAuxSerialPins() {
    if (isBrainPinValid(engineConfiguration->auxSerialTxPin))
        efiSetPadMode("AuxSerial TX", engineConfiguration->auxSerialTxPin, PAL_MODE_ALTERNATE(8));
    if (isBrainPinValid(engineConfiguration->auxSerialRxPin))
        efiSetPadMode("AuxSerial RX", engineConfiguration->auxSerialRxPin, PAL_MODE_ALTERNATE(8));
 
    enableAuxSerial();
}
 
void initAuxSerial(void) {
    addConsoleAction("auxinfo", auxInfo);
 
    isSerialRXEnabled = isBrainPinValid(engineConfiguration->auxSerialRxPin);
    isSerialTXEnabled = isBrainPinValid(engineConfiguration->auxSerialTxPin);
 
    isSerialEnabled =
        isSerialRXEnabled || // we need at least one pin set
        isSerialTXEnabled;
 
    // exit if no pin is configured
    if (!isSerialEnabled)
        return;
 
    // Validate pins 
    if (isSerialTXEnabled && !isValidSerialTxPin(engineConfiguration->auxSerialTxPin)) {
        criticalError("unexpected aux TX pin");
        return;
    }
 
    if (isSerialRXEnabled && !isValidSerialRxPin(engineConfiguration->auxSerialRxPin)) {
        criticalError("unexpected aux RX pin");
        return;
    }
 
    startAuxSerialPins();
 
    if (isSerialRXEnabled)
        serialRead.start();
}
 
#endif // EFI_AUX_SERIAL