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AN1105 데이터시트(PDF) 70 Page - STMicroelectronics

부품명 AN1105
상세설명  ST7 pCAN PERIPHERAL DRIVER
PDF  100 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1105 데이터시트(HTML) 70 Page - STMicroelectronics

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ST7 pCAN PERIPHERAL DRIVER
if (ValBit(CANBCSR,RDY))
//Check if the register is already in use
{
return CAN_TRANSMIT_BUFFER_FULL;
//Exit if yes
}
else
{
CAN_Buffer* msg_to_send_ptr;
u8* data_ptr;
CAN_Data_Size data_length;
msg_to_send_ptr=CAN_Out_Queue();
//If no, get the first message
in the queue
if (msg_to_send_ptr==NULL)
{
return CAN_TRANSMIT_NO_MSG;
//Aborts process if queue
empty
}
CANIDLR=0x00;
CANIDHR=0x00;
data_length=msg_to_send_ptr->data_size;
data_ptr=msg_to_send_ptr->CAN_msg_data;
//!!!Code is here dependant of the order of the fields in the data structure
//Writing both CANIDHR and CANIDLR
CANIDLR = *(((unsigned char*)msg_to_send_ptr)+1);
CANIDHR = *((unsigned char*)msg_to_send_ptr);
_asm("SLL _CANIDLR \n RLC _CANIDHR");
{
register u8 counter;
if (data_length==REMOTE_FRAME) /*If remote frame, send immediately*/
{
SetBit(CANIDLR,RTR);
}
else
{
CANIDLR |= data_length;
for (counter=0;counter<data_length;counter++)
{



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