Questions about FLEXCAN_DRV_InstallEventCallback warning

Sang-Hoon_Ahn — Wed, 01 Mar 2023 15:19:38 GMT

hi
I am writing a CAN FD communication firmware utilizing the MPC5748G.

During the development of the firmware, I am using the FLEXCAN_DRV_InstallEventCallback function to write in interrupt format as much as possible.

This function takes 3 parameters as arguments, and for the callbackParam argument, I usually enter the value as 'NULL' in other examples.

ex) FLEXCAN_DRV_InstallEventCallback(INST_CANCOM1, FlexCan_RxTx_Callback, NULL);

This will cause the following warining in the function.
'passing argument 2 of 'FLEXCAN_DRV_InstallEventCallback' from incompatible pointer type'

Why does this warning occur, and can I ignore it?

Re: Questions about FLEXCAN_DRV_InstallEventCallback warning

PetrS — Thu, 02 Mar 2023 10:21:01 GMT

Hi,

maybe your callback function has different parameter type used. Did you define function as below?

void FlexCan_RxTx_Callback(uint8_t instance, flexcan_event_type_t eventType, uint32_t mb_num,
flexcan_state_t *flexcanState)
{
(void)flexcanState;
(void)instance;

switch(eventType)
{
....

BR, Petr

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Questions about FLEXCAN_DRV_InstallEventCallback warning

Re: Questions about FLEXCAN_DRV_InstallEventCallback warning