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Fix for reading extended frames without filters #10

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Fix for reading extended frames without filters #10

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84956a5
should modify CANb_CTRL2 to allow extended frames, even if global mai…
maxpfeif Feb 16, 2019
d1906bb
should modify CANb_CTRL2 to allow extended frames, even if global mai…
maxpfeif Feb 16, 2019
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4 changes: 4 additions & 0 deletions FlexCAN.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
#define FLEXCANb_IDFLT_TAB(b, n) (*(vuint32_t*)(b+0xE0+(n*4)))
#define FLEXCANb_MB_MASK(b, n) (*(vuint32_t*)(b+0x880+(n*4)))
#define FLEXCANb_ESR1(b) (*(vuint32_t*)(b+0x20))
#define FLEXCANb_CTRL2(b) (*(vuint32_t*)(b+0x34))

#if defined(__MK66FX1M0__)
# define INCLUDE_FLEXCAN_CAN1
Expand Down Expand Up @@ -216,6 +217,9 @@ void FlexCAN::begin (uint32_t baud, const CAN_filter_t &mask, uint8_t txAlt, uin

setBaudRate(baud);

// need to modify CTRL2 to allow extended frames, even if global mailbox filter is unused
FLEXCANb_CTRL2(flexcanBase) |= (BIT16);

// enable per-mailbox filtering

FLEXCANb_MCR(flexcanBase) |= FLEXCAN_MCR_IRMQ;
Expand Down