49 lines
1.4 KiB
C++

#ifdef FEATURE_ENABLE_CAN
#include "can.h"
MCP_CAN CAN0(GPIO_CS_CAN);
void Init_CAN()
{
if (CAN0.begin(MCP_STDEXT, CAN_500KBPS, MCP_16MHZ) != CAN_OK)
MaintainDTC(DTC_CAN_TRANSCEIVER_FAILED, DTC_CRITICAL, true);
CAN0.init_Mask(0, 0, 0x07FF0000); // Init first mask...
CAN0.init_Mask(1, 0, 0x07FF0000); // Init second mask...
CAN0.init_Filt(0, 0, 0x012D0000); // Init first filter...
CAN0.setMode(MCP_NORMAL);
}
uint32_t Process_CAN_WheelSpeed()
{
#define FACTOR_RWP_KMH_890ADV 18 // Divider to convert Raw Data to km/h
can_frame canMsg;
static uint32_t lastRecTimestamp = 0;
uint16_t RearWheelSpeed_raw;
uint32_t milimeters_to_add = 0;
if (CAN0.readMsgBuf(&canMsg.can_id, &canMsg.can_dlc, canMsg.data) == CAN_OK)
{
RearWheelSpeed_raw = (uint16_t)canMsg.data[5] << 8 | canMsg.data[6];
// raw / FACTOR_RWP_KMH_890ADV -> km/h * 100000 -> cm/h / 3600 -> cm/s
// raw * 500 -> cm/s
uint32_t RWP_millimeter_per_second = (((uint32_t)RearWheelSpeed_raw * 1000000) / FACTOR_RWP_KMH_890ADV) / 3600;
uint32_t timesincelast = millis() - lastRecTimestamp;
lastRecTimestamp = millis();
milimeters_to_add = (RWP_millimeter_per_second * timesincelast) / 1000;
}
if (lastRecTimestamp != 0)
{
MaintainDTC(DTC_NO_CAN_SIGNAL, DTC_CRITICAL, (millis() > lastRecTimestamp + 10000 ? true : false));
}
return milimeters_to_add;
}
#endif