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[/] [minsoc/] [trunk/] [sw/] [drivers/] [can.h] - Blame information for rev 36

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Line No. Rev Author Line
1 36 rfajardo
 
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struct can_type
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{
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    unsigned char rtr;
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    unsigned char len;
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    unsigned short identifier;
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    unsigned char data[8];
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};
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typedef struct can_type can_type;
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#define CAN_BUF_LEN     10
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void can_init(void);
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void can_irq(void);
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can_type * can_get(void);       //return pointer to first non read received data
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int can_send_basic();           //return (-1) or length (still processing previous) or asserted
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void can_abort(void);
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//BOTH MODES
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#define CAN_MODE            0x00
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#define CAN_CMD             0x01
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#define CAN_STATUS          0x02
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#define IRQ_READ            0x03
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#define CAN_ACPT_CODE0      0x04    //only writable while in reset mode
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#define CAN_ACPT_MASK0      0x05    //only writable while in reset mode
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#define CAN_BUS_TIMING_0    0x06    //only writable while in reset mode
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#define CAN_BUS_TIMING_1    0x07    //only writable while in reset mode
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#define CAN_BUS_CLKDIV      0x1F    //only writable while NOT in reset mode
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#define CAN_TX_BUF          0x0A   //only accessable while NOT in reset mode
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#define CAN_TX_LEN          10
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#define CAN_RX_BUF          0x14   //free read access for basic mode
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#define CAN_RX_LEN          10
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//only accessable while in reset mode
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#define CAN_BUS_MODE        0x1F
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//EXTENDED MODE ONLY
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//only for extended mode & only accessable while in reset mode
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#define CAN_IRQ_EN_EXT      0x04    //also writable if NOT in reset mode 
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//read only regs
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#define CAN_ARBIT_LOSS_CNT          0x0B    //cnt of arbitration loss
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#define CAN_ERROR_CAPTURE_CODE      0x0C
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#define CAN_RX_MSG_CNT              0x1D
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//~read only regs
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#define CAN_ERROR_WARN_LIMIT        0x0D
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#define CAN_RX_ERR_CNT      0x0E
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#define CAN_TX_ERR_CNT      0x0F
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#define CAN_ACPT_CODE0_EXT  0x10    //also writable if NOT in reset mode
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#define CAN_ACPT_CODE1      0x11
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#define CAN_ACPT_CODE2      0x12
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#define CAN_ACPT_CODE3      0x13
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#define CAN_ACPT_MASK0_EXT  0x14    //also writable if NOT in reset mode
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#define CAN_ACPT_MASK1      0x15
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#define CAN_ACPT_MASK2      0x16
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#define CAN_ACPT_MASK3      0x17
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#define CAN_TX_BUF_EXT      0x10   //accessable if transmit_buffer_status=1 
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#define CAN_TX_LEN_EXT      13     //ignores reset mode
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#define CAN_RX_BUF_EXT      0x10   //read access only in NOT reset mode
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#define CAN_RX_LEN_EXT      13
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//BITS DEFINITIONS
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//BASIC MODE
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#define CAN_MODE_RESET             0x01
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#define CAN_MODE_LISTEN_ONLY_BASIC 0x20
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#define CAN_MODE_RECV_IRQ_EN       0x02
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#define CAN_MODE_TX_IRQ_EN         0x04
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#define CAN_MODE_ERROR_IRQ_EN      0x08
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#define CAN_MODE_OVERRUN_IRQ_EN    0x10
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//EXTENDED MODE
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#define CAN_MODE_LISTEN_ONLY_EXT   0x02
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#define CAN_MODE_SELF_TEST_MODE    0x04
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#define CAN_MODE_ACPT_FILTER_MODE  0x08
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//CMD
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#define CAN_CMD_CLR_DATA_OVERRUN   0x08
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#define CAN_CMD_RELEASE_BUFFER     0x04
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#define CAN_CMD_TX_REQ             0x11
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#define CAN_CMD_ABORT_TX           0x02
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//STATUS
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#define CAN_STATUS_NODE_BUS_OFF    0x80
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#define CAN_STATUS_ERROR           0x40
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#define CAN_STATUS_TX              0x20
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#define CAN_STATUS_RX              0x10
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#define CAN_STATUS_TX_COMPLETE     0x08
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#define CAN_STATUS_TX_BUF          0x04
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#define CAN_STATUS_OVERRUN         0x02
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#define CAN_STATUS_RX_BUF          0x01
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//IRQ READ
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#define CAN_IRQ_READ_BUS_ERROR          0x80
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#define CAN_IRQ_READ_ARBIT_LOST         0x40
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#define CAN_IRQ_READ_ERROR_PASSIV       0x20
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#define CAN_IRQ_READ_OVERRUN            0x08
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#define CAN_IRQ_READ_ERROR              0x04
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#define CAN_IRQ_READ_TX                 0x02
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#define CAN_IRQ_READ_RX                 0x01
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//BUS_TIMING_0
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#define CAN_BUS_TIMING_0_SYNC_JMP_SHIFT     6
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#define CAN_BUS_TIMING_0_SYNC_JMP           0xC0
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#define CAN_BUS_TIMING_0_BAUD_PRESC         0x3F
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//BUS_TIMING_1
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#define CAN_BUS_TIMING_1_TRIPLE_SAMP_SHIFT  7
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#define CAN_BUS_TIMING_1_TRIPLE_SAMP        0x80
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#define CAN_BUS_TIMING_1_TIME_SEG2_SHIFT    4
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#define CAN_BUS_TIMING_1_TIME_SEG2          0x70
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#define CAN_BUS_TIMING_1_TIME_SEG1          0x0F
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//CLKDIV
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//only writable while NOT in reset mode
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#define CAN_BUS_CLKDIV_MASK                 0x07
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//EXTENDED MODE ONLY
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//CLKMODE
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//only writable while in reset mode
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#define CAN_BUS_MODE_CLOCK_OFF              0x08
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#define CAN_BUS_MODE_EXTENDED_MODE          0x80
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//EXTENDED MODE IRQ
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#define CAN_IRQ_EN_EXT_BUS_ERROR          0x80
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#define CAN_IRQ_EN_EXT_ARBIT_LOST         0x40
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#define CAN_IRQ_EN_EXT_ERROR_PASSIV       0x20
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#define CAN_IRQ_EN_EXT_OVERRUN            0x08
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#define CAN_IRQ_EN_EXT_ERROR              0x04
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#define CAN_IRQ_EN_EXT_TX                 0x02
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#define CAN_IRQ_EN_EXT_RX                 0x01
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//EXTENDED ERROR CODES
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#define CAN_ERROR_CAPTURE_CODE_TYPE_SHIFT 6
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#define CAN_ERROR_CAPTURE_CODE_TYPE       0xC0
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#define CAN_ERROR_CAPTURE_CODE_TYPE_BIT   0x0
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#define CAN_ERROR_CAPTURE_CODE_TYPE_FORM  0x1
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#define CAN_ERROR_CAPTURE_CODE_TYPE_STUFF 0x2
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#define CAN_ERROR_CAPTURE_CODE_TYPE_OTHER 0x3
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#define CAN_ERROR_CAPTURE_CODE_DIR        0x40  //1 = TX | 0 = RX
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#define CAN_ERROR_CAPTURE_CODE_SEG        0x1F
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