Техническая Спецификация для Mikroelektronika MIKROE-350

CANSPI_CONFIG_DBL_BUFFER_BIT  

as byte = $10

CANSPI_CONFIG_DBL_BUFFER_ON   

as byte = $FF   ' XXX1XXXX

CANSPI_CONFIG_DBL_BUFFER_OFF  

as byte = $EF   ' XXX0XXXX

CANSPI_CONFIG_MSG_BITS        

as byte = $60

CANSPI_CONFIG_ALL_MSG         

as byte = $FF   ' X11XXXXX

CANSPI_CONFIG_VALID_XTD_MSG   

as byte = $DF   ' X10XXXXX

CANSPI_CONFIG_VALID_STD_MSG   

as byte = $BF   ' X01XXXXX

CANSPI_CONFIG_ALL_VALID_MSG   

as byte = $9F   ' X00XXXXX

You may use bitwise and to form config byte out of these values. For example:

init  = CANSPI_CONFIG_SAMPLE_THRICE    

CANSPI_CONFIG_PHSEG2_PRG_ON   

CANSPI_CONFIG_STD_MSG         

CANSPI_CONFIG_DBL_BUFFER_ON   

CANSPI_CONFIG_VALID_XTD_MSG   

CANSPI_CONFIG_LINE_FILTER_OFF

...

CANSPIInit(1, 1, 3, 3, 1, init)   ' initialize CANSPI

CANSPI_TX_MSG_FLAGS are flags related to transmission of a CAN message:

const

CANSPI_TX_PRIORITY_BITS 

as byte = $03

CANSPI_TX_PRIORITY_0    

as byte = $FC   ' XXXXXX00

CANSPI_TX_PRIORITY_1    

as byte = $FD   ' XXXXXX01

CANSPI_TX_PRIORITY_2    

as byte = $FE   ' XXXXXX10

CANSPI_TX_PRIORITY_3    

as byte = $FF   ' XXXXXX11

CANSPI_TX_FRAME_BIT     

= $08

CANSPI_TX_STD_FRAME     

= $FF  ' XXXXX1XX

CANSPI_TX_XTD_FRAME     

= $F7  ' XXXXX0XX

CANSPI_TX_RTR_BIT       

as byte = $40

CANSPI_TX_NO_RTR_FRAME  

as byte = $FF   ' X1XXXXXX

CANSPI_TX_RTR_FRAME     

as byte = $BF   ' X0XXXXXX

You may use bitwise and to adjust the appropriate flags. For example:

' form value to be used with CANSendMessage:
send_config  = CANSPI_TX_PRIORITY_0     

CANSPI_TX_XTD_FRAME     

CANSPI_TX_NO_RTR_FRAME

...

CANSPI1Write(id, data, 1, send_config)

183

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6