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https://opencores.org/ocsvn/minsoc/minsoc/trunk
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[/] [minsoc/] [trunk/] [sw/] [drivers/] [can.h] - Rev 75
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struct can_type { unsigned char rtr; unsigned char len; unsigned short identifier; unsigned char data[8]; }; typedef struct can_type can_type; #define CAN_BUF_LEN 10 void can_init(void); void can_irq(void); can_type * can_get(void); //return pointer to first non read received data int can_send_basic(); //return (-1) or length (still processing previous) or asserted void can_abort(void); //BOTH MODES #define CAN_MODE 0x00 #define CAN_CMD 0x01 #define CAN_STATUS 0x02 #define IRQ_READ 0x03 #define CAN_ACPT_CODE0 0x04 //only writable while in reset mode #define CAN_ACPT_MASK0 0x05 //only writable while in reset mode #define CAN_BUS_TIMING_0 0x06 //only writable while in reset mode #define CAN_BUS_TIMING_1 0x07 //only writable while in reset mode #define CAN_BUS_CLKDIV 0x1F //only writable while NOT in reset mode #define CAN_TX_BUF 0x0A //only accessable while NOT in reset mode #define CAN_TX_LEN 10 #define CAN_RX_BUF 0x14 //free read access for basic mode #define CAN_RX_LEN 10 //only accessable while in reset mode #define CAN_BUS_MODE 0x1F //EXTENDED MODE ONLY //only for extended mode & only accessable while in reset mode #define CAN_IRQ_EN_EXT 0x04 //also writable if NOT in reset mode //read only regs #define CAN_ARBIT_LOSS_CNT 0x0B //cnt of arbitration loss #define CAN_ERROR_CAPTURE_CODE 0x0C #define CAN_RX_MSG_CNT 0x1D //~read only regs #define CAN_ERROR_WARN_LIMIT 0x0D #define CAN_RX_ERR_CNT 0x0E #define CAN_TX_ERR_CNT 0x0F #define CAN_ACPT_CODE0_EXT 0x10 //also writable if NOT in reset mode #define CAN_ACPT_CODE1 0x11 #define CAN_ACPT_CODE2 0x12 #define CAN_ACPT_CODE3 0x13 #define CAN_ACPT_MASK0_EXT 0x14 //also writable if NOT in reset mode #define CAN_ACPT_MASK1 0x15 #define CAN_ACPT_MASK2 0x16 #define CAN_ACPT_MASK3 0x17 #define CAN_TX_BUF_EXT 0x10 //accessable if transmit_buffer_status=1 #define CAN_TX_LEN_EXT 13 //ignores reset mode #define CAN_RX_BUF_EXT 0x10 //read access only in NOT reset mode #define CAN_RX_LEN_EXT 13 //BITS DEFINITIONS //BASIC MODE #define CAN_MODE_RESET 0x01 #define CAN_MODE_LISTEN_ONLY_BASIC 0x20 #define CAN_MODE_RECV_IRQ_EN 0x02 #define CAN_MODE_TX_IRQ_EN 0x04 #define CAN_MODE_ERROR_IRQ_EN 0x08 #define CAN_MODE_OVERRUN_IRQ_EN 0x10 //EXTENDED MODE #define CAN_MODE_LISTEN_ONLY_EXT 0x02 #define CAN_MODE_SELF_TEST_MODE 0x04 #define CAN_MODE_ACPT_FILTER_MODE 0x08 //CMD #define CAN_CMD_CLR_DATA_OVERRUN 0x08 #define CAN_CMD_RELEASE_BUFFER 0x04 #define CAN_CMD_TX_REQ 0x11 #define CAN_CMD_ABORT_TX 0x02 //STATUS #define CAN_STATUS_NODE_BUS_OFF 0x80 #define CAN_STATUS_ERROR 0x40 #define CAN_STATUS_TX 0x20 #define CAN_STATUS_RX 0x10 #define CAN_STATUS_TX_COMPLETE 0x08 #define CAN_STATUS_TX_BUF 0x04 #define CAN_STATUS_OVERRUN 0x02 #define CAN_STATUS_RX_BUF 0x01 //IRQ READ #define CAN_IRQ_READ_BUS_ERROR 0x80 #define CAN_IRQ_READ_ARBIT_LOST 0x40 #define CAN_IRQ_READ_ERROR_PASSIV 0x20 #define CAN_IRQ_READ_OVERRUN 0x08 #define CAN_IRQ_READ_ERROR 0x04 #define CAN_IRQ_READ_TX 0x02 #define CAN_IRQ_READ_RX 0x01 //BUS_TIMING_0 #define CAN_BUS_TIMING_0_SYNC_JMP_SHIFT 6 #define CAN_BUS_TIMING_0_SYNC_JMP 0xC0 #define CAN_BUS_TIMING_0_BAUD_PRESC 0x3F //BUS_TIMING_1 #define CAN_BUS_TIMING_1_TRIPLE_SAMP_SHIFT 7 #define CAN_BUS_TIMING_1_TRIPLE_SAMP 0x80 #define CAN_BUS_TIMING_1_TIME_SEG2_SHIFT 4 #define CAN_BUS_TIMING_1_TIME_SEG2 0x70 #define CAN_BUS_TIMING_1_TIME_SEG1 0x0F //CLKDIV //only writable while NOT in reset mode #define CAN_BUS_CLKDIV_MASK 0x07 //EXTENDED MODE ONLY //CLKMODE //only writable while in reset mode #define CAN_BUS_MODE_CLOCK_OFF 0x08 #define CAN_BUS_MODE_EXTENDED_MODE 0x80 //EXTENDED MODE IRQ #define CAN_IRQ_EN_EXT_BUS_ERROR 0x80 #define CAN_IRQ_EN_EXT_ARBIT_LOST 0x40 #define CAN_IRQ_EN_EXT_ERROR_PASSIV 0x20 #define CAN_IRQ_EN_EXT_OVERRUN 0x08 #define CAN_IRQ_EN_EXT_ERROR 0x04 #define CAN_IRQ_EN_EXT_TX 0x02 #define CAN_IRQ_EN_EXT_RX 0x01 //EXTENDED ERROR CODES #define CAN_ERROR_CAPTURE_CODE_TYPE_SHIFT 6 #define CAN_ERROR_CAPTURE_CODE_TYPE 0xC0 #define CAN_ERROR_CAPTURE_CODE_TYPE_BIT 0x0 #define CAN_ERROR_CAPTURE_CODE_TYPE_FORM 0x1 #define CAN_ERROR_CAPTURE_CODE_TYPE_STUFF 0x2 #define CAN_ERROR_CAPTURE_CODE_TYPE_OTHER 0x3 #define CAN_ERROR_CAPTURE_CODE_DIR 0x40 //1 = TX | 0 = RX #define CAN_ERROR_CAPTURE_CODE_SEG 0x1F
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