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Improve CAN datatypes and prevent overflow

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Daniel Öster 2023-02-27 13:47:46 -08:00 • committed by GitHub
parent 9c694058cb
commit e35da04118
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1 changed files with 34 additions and 23 deletions
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57
Software/BYD-MODBUS-2-LEAF-CAN.ino
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@ -26,15 +26,15 @@ CAN_frame_t LEAF_50C = {.MsgID = 0x50C, LEAF_50C.FIR.B.DLC = 8, LEAF_50C.FIR.B.F
//Nissan LEAF battery parameters from CAN
#define WH_PER_GID 77 //One GID is this amount of Watt hours
int LB_Discharge_Power_Limit = 0; //Limit in kW
int LB_MAX_POWER_FOR_CHARGER = 0; //Limit in kW
int LB_SOC = 0; //0 - 100.0 % (0-1000)
long LB_Wh_Remaining = 0; //Amount of energy in battery, in Wh
int LB_GIDS = 0;
int LB_MAX = 0;
int LB_Max_GIDS = 273; //Startup in 24kWh mode
int16_t LB_Current = 0; //Current in kW going in/out of battery
int LB_Total_Voltage = 370; //Battery voltage (0-450V)
uint16_t LB_Discharge_Power_Limit = 0; //Limit in kW
uint16_t LB_MAX_POWER_FOR_CHARGER = 0; //Limit in kW
uint16_t LB_SOC = 0; //0 - 100.0 % (0-1000)
uint16_t LB_Wh_Remaining = 0; //Amount of energy in battery, in Wh
uint16_t LB_GIDS = 0;
uint16_t LB_MAX = 0;
uint16_t LB_Max_GIDS = 273; //Startup in 24kWh mode
int16_t LB_Current = 0; //Current in A going in/out of battery
uint16_t LB_Total_Voltage = 370; //Battery voltage (0-450V)
// global Modbus memory registers
const int intervalModbusTask = 4800; //Interval at which to refresh modbus registers
@ -132,8 +132,22 @@ void update_values()
SOC = (LB_SOC * 10); //increase range from 0-100.0 -> 100.00
capacity_Wh = (LB_Max_GIDS * WH_PER_GID);
remaining_capacity_Wh = LB_Wh_Remaining;
max_target_discharge_power = (LB_Discharge_Power_Limit * 1000); //kW to W
max_target_charge_power = (LB_MAX_POWER_FOR_CHARGER * 1000); //kW to W
if(LB_Discharge_Power_Limit > 60) //if >60kW can be pulled from battery
{
max_target_discharge_power = 60000; //cap value so we don't go over 16bits
}
else
{
max_target_discharge_power = (LB_Discharge_Power_Limit * 1000); //kW to W
}
if(LB_MAX_POWER_FOR_CHARGER > 60)
{
max_target_charge_power = 60000; //cap value so we don't go over 16bits
}
else
{
max_target_charge_power = (LB_MAX_POWER_FOR_CHARGER * 1000); //kW to W
}
TemperatureMin = 50; //hardcoded, todo, read from 5C0
TemperatureMax = 60; //hardcoded, todo, read from 5C0
}
@ -179,12 +193,12 @@ void handle_update_data_modbusp201() {
void handle_update_data_modbusp301() {
// Store the data into the array
static uint16_t battery_data[23];
if (LB_Current > 0) {
bms_char_dis_status = 1; //Discharging
} else if (LB_Current < 0) {
bms_char_dis_status = 2; //Charging
if (LB_Current > 0) { //Positive value = Charging on LEAF
bms_char_dis_status = 2; //Charging
} else if (LB_Current < 0) { //Negative value = Discharging on LEAF
bms_char_dis_status = 1; //Discharging
} else { //LB_Current == 0
bms_char_dis_status = 0;
bms_char_dis_status = 0; //idle
}
bms_status = 3; //Todo add logic here
@ -236,20 +250,17 @@ void handle_can()
switch (rx_frame.MsgID)
{
case 0x1DB:
printf("1DB \n");
LB_Current = (rx_frame.data.u8[0] << 3) | (rx_frame.data.u8[1] & 0xe0) >> 5; //TODO TEST THIS
if (LB_Current & 0x0400)//TODO TEST THIS
LB_Current = (rx_frame.data.u8[0] << 3) | (rx_frame.data.u8[1] & 0xe0) >> 5;
if (LB_Current & 0x0400)
{
// negative so extend the sign bit
LB_Current |= 0xf800; //TODO TEST THIS
LB_Current |= 0xf800;
}
Serial.println(LB_Current);//TODO TEST THIS
LB_Total_Voltage = ((rx_frame.data.u8[2] << 2) | (rx_frame.data.u8[3] & 0xc0) >> 6) / 2;
break;
case 0x1DC:
LB_Discharge_Power_Limit = ((rx_frame.data.u8[0] << 2 | rx_frame.data.u8[1] >> 6) / 4.0);
LB_MAX_POWER_FOR_CHARGER = ((((rx_frame.data.u8[2] & 0x0F) << 6 | rx_frame.data.u8[3] >> 2) / 10.0) -
10); //check if -10 is correct offset
LB_MAX_POWER_FOR_CHARGER = ((((rx_frame.data.u8[2] & 0x0F) << 6 | rx_frame.data.u8[3] >> 2) / 10.0) - 10);
break;
case 0x55B:
LB_SOC = (rx_frame.data.u8[0] << 2 | rx_frame.data.u8[1] >> 6);