Posted on December 25, 2013 at 13:57I have been spending days trying to get the CAN bus functional on the stm32vldiscovery board. But it always fails on initialization. I am quite familiar with using the Stm32 chips, but the CAN is completely eluding my debugging. I do not see any signals on the CAN pins. I have tried remapping to the alternate pins. but, to no avail. I also ported the Keil code over, but it locks up with the CAN Interrupt enabling.
Attached is one of the sample codes that I tried and modified.
In debugging it fails here :
uint8_t CAN_Init(CAN_TypeDef* CANx, CAN_InitTypeDef* CAN_InitStruct)
{
..
/* Check acknowledge */
if ((CANx->MSR & CAN_MSR_INAK) != CAN_MSR_INAK)
..
Notice that the code is in Loopback mode. I also tried cross connecting the CAN TX and RX pins, also attaching a Mcp2551 chip - still no luck ..
Any help - Thanks !
#can-bus
