EXPORT void Can_InitController(uint8 Controller,const Can_ControllerConfigType* Config)
{
Can_UnitType *canUnit;
StatusType ercd;
canUnit = CAN_GET_PRIVATE_DATA(Controller);
#if(CAN_DEV_ERROR_DETECT == STD_ON)
if(CAN_UNINIT == Can_Global.driverState)
{
Det_ReportError(MODULE_ID_CAN,0,CAN_INITCONTROLLER_SERVICE_ID,CAN_E_UNINIT);
return;
}
if(NULL == Config)
{
Det_ReportError(MODULE_ID_CAN,0,CAN_INITCONTROLLER_SERVICE_ID,CAN_E_PARAM_POINTER);
return;
}
if(Controller >= CAN_CONTROLLER_CNT)
{
Det_ReportError(MODULE_ID_CAN,0,CAN_INITCONTROLLER_SERVICE_ID,CAN_E_PARAM_CONTROLLER);
return;
}
if(canUnit->state!=CANIF_CS_STOPPED)
{
Det_ReportError(MODULE_ID_CAN,0,CAN_INITCONTROLLER_SERVICE_ID,CAN_E_TRANSITION);
return;
}
#endif
ercd = Can_Hw_InitController(Controller,Config);
if(ercd != E_OK)
{
return;
}
canUnit->state = CANIF_CS_STOPPED;
Can_EnableControllerInterrupts(Controller);
}
EXPORT Can_ReturnType Can_Hw_SetControllerMode(uint8 controller,Can_StateTransitionType transition)
{
imask_t state;
CAN_HW_t *canHw;
Can_ReturnType rv = CAN_OK;
Can_UnitType *canUnit = CAN_GET_PRIVATE_DATA(controller);
VALIDATE( (canUnit->state!=CANIF_CS_UNINIT), 0x3, CAN_E_UNINIT );
canHw = GetController(controller);
switch(transition )
{
case CAN_T_START:
canUnit->state = CANIF_CS_STARTED;
Irq_Save(state);
if (canUnit->lock_cnt == 0){ // REQ CAN196
Can_EnableControllerInterrupts(controller);
}
Irq_Restore(state);
break;
case CAN_T_WAKEUP:
VALIDATE(canUnit->state == CANIF_CS_SLEEP, 0x3, CAN_E_TRANSITION);
CAN_WakeUp(canHw);
canUnit->state = CANIF_CS_STOPPED;
break;
case CAN_T_SLEEP: //CAN258, CAN290
// Should be reported to DEM but DET is the next best
VALIDATE(canUnit->state == CANIF_CS_STOPPED, 0x3, CAN_E_TRANSITION);
CAN_Sleep(canHw);
canUnit->state = CANIF_CS_SLEEP;
break;
case CAN_T_STOP:
// Stop
canUnit->state = CANIF_CS_STOPPED;
Can_AbortTx( canHw, canUnit ); // CANIF282
break;
default:
// Should be reported to DEM but DET is the next best
VALIDATE(canUnit->state == CANIF_CS_STOPPED, 0x3, CAN_E_TRANSITION);
break;
}
return rv;
}
EXPORT Std_ReturnType Can_Hw_InitController(uint8 controller,const Can_ControllerConfigType* config)
{
CAN_HW_t *canHw;
uint8_t tq;
uint8_t tqSync;
uint8_t tq1;
uint8_t tq2;
uint32_t clock;
Can_UnitType *canUnit;
uint8 cId = controller;
const Can_ControllerConfigType *canHwConfig;
const Can_HardwareObjectType *hohObj;
canUnit = CAN_GET_PRIVATE_DATA(controller);
canHw = GetController(cId);
canHwConfig = CAN_GET_CONTROLLER_CONFIG(Can_Global.channelMap[cId]);
// Start this baby up
CAN_DeInit(canHw);
/* CAN filter init. We set up two filters - one for the master (CAN1) and
* one for the slave (CAN2)
*
* CAN_SlaveStartBank(n) denotes which filter is the first of the slave.
*
* The filter registers reside in CAN1 and is shared to CAN2, so we only need
* to set up this once.
*/
// We let all frames in and do the filtering in software.
CAN_FilterInitTypeDef CAN_FilterInitStructure;
CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;
CAN_FilterInitStructure.CAN_FilterIdHigh=0x0000;
CAN_FilterInitStructure.CAN_FilterIdLow=0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdLow=0x0000;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;
// Init filter 0 (CAN1/master)
CAN_FilterInitStructure.CAN_FilterNumber=0;
CAN_FilterInit(&CAN_FilterInitStructure);
// Init filter 1 (CAN2/slave)
CAN_FilterInitStructure.CAN_FilterNumber=1;
CAN_FilterInit(&CAN_FilterInitStructure);
// Set which filter to use for CAN2.
CAN_SlaveStartBank(1);
// acceptance filters
hohObj = canHwConfig->Can_Hoh;
--hohObj;
do {
++hohObj;
if (hohObj->CanObjectType == CAN_OBJECT_TYPE_RECEIVE)
{
// TODO Hw filtering
}
}while( !hohObj->Can_EOL );
// Clock calucation
// -------------------------------------------------------------------
//
// * 1 TQ = Sclk period( also called SCK )
// * Ftq = Fcanclk / ( PRESDIV + 1 ) = Sclk
// ( Fcanclk can come from crystal or from the peripheral dividers )
//
// -->
// TQ = 1/Ftq = (PRESDIV+1)/Fcanclk --> PRESDIV = (TQ * Fcanclk - 1 )
// TQ is between 8 and 25
clock = McuE_GetSystemClock()/2;
tqSync = config->CanControllerPropSeg + 1;
tq1 = config->CanControllerSeg1 + 1;
tq2 = config->CanControllerSeg2 + 1;
tq = tqSync + tq1 + tq2;
CAN_InitTypeDef CAN_InitStructure;
CAN_StructInit(&CAN_InitStructure);
/* CAN cell init */
CAN_InitStructure.CAN_TTCM=DISABLE;
CAN_InitStructure.CAN_ABOM=ENABLE;
CAN_InitStructure.CAN_AWUM=ENABLE;
CAN_InitStructure.CAN_NART=DISABLE;
CAN_InitStructure.CAN_RFLM=DISABLE;
CAN_InitStructure.CAN_TXFP=DISABLE;
if(config->Can_Loopback){
CAN_InitStructure.CAN_Mode=CAN_Mode_LoopBack;
}else{
CAN_InitStructure.CAN_Mode=CAN_Mode_Normal;
}
CAN_InitStructure.CAN_SJW=config->CanControllerPropSeg;
CAN_InitStructure.CAN_BS1=config->CanControllerSeg1;
CAN_InitStructure.CAN_BS2=config->CanControllerSeg2;
CAN_InitStructure.CAN_Prescaler= clock/(config->CanControllerBaudRate*1000*tq);
if(CANINITOK != CAN_Init(canHw,&CAN_InitStructure))
{
return E_NOT_OK;
}
canUnit->state = CANIF_CS_STOPPED;
Can_EnableControllerInterrupts(cId);
return E_OK;
}
