in meinem STM32-CAN Interface verwende ich folgende bxCAN Einstellungen für die unterschiedlichen Baudraten:
typedef enum bitrate_ty {
_500_kbit
, _250_kbit
, _125_kbit
, _100_kbit
, _95_kbit
, _83_kbit
, _50_kbit
, _33_kbit
, _20_kbit
, _10_kbit
, COUNT_BITRATE
} enBitrate_t;
typedef struct Bitrate_t {
unsigned int Prescaler;
unsigned char BS1;
unsigned char BS2;
} Bitrate_st ;
const Bitrate_st stBitrate[COUNT_BITRATE]= { // use the same order from enum enBitrate_t
// PRESCal BS1 BS2 // This values are valid for: system clock = 72MHz (PCLK1 = 36 MHz)
{ 6 , CAN_BS1_8tq, CAN_BS2_3tq} // 500kbit
, { 12 , CAN_BS1_8tq, CAN_BS2_3tq} // 250kbit
, { 24 , CAN_BS1_8tq, CAN_BS2_3tq} // 125kbit
, { 30 , CAN_BS1_8tq, CAN_BS2_3tq} // 100kbit
, { 42 , CAN_BS1_6tq, CAN_BS2_2tq} // 95kbit
, { 36 , CAN_BS1_8tq, CAN_BS2_3tq} // 83kbit
, { 60 , CAN_BS1_8tq, CAN_BS2_3tq} // 50kbit
, { 90 , CAN_BS1_8tq, CAN_BS2_3tq} // 33kbit
, { 150 , CAN_BS1_8tq, CAN_BS2_3tq} // 20kbit
, { 300 , CAN_BS1_8tq, CAN_BS2_3tq} // 10kbit
};
Und die Werte für die nicht unterstützten Baudraten 1 MBit und 800 kBit würde ich folgende verwenden:
{ 2 , CAN_BS1_12tq, CAN_BS2_5tq} // 1 MBit
, { 3 , CAN_BS1_10tq, CAN_BS2_4tq} // 800 kBit
