Hello,
I kinda want to do a similar thing as here , exept that the structure I want to pass includes vectors or arrays. Therefore the code is not working. In general I try to write a driver block for Simulink for UART communication for a raspberry pi with a Matlab System. The UART code is working fine.
In my System code I create a struct and fill it with the inputs of the System. Now I want to pass a pointer to that struct to my extern send function (with some other arguments).
Here is the Code:
toFluco_struct = struct('velocity',u1,'heading',u2);
coder.cinclude('piData.h');
coder.cstructname(toFluco_struct, 'piData_toFluco_t', 'extern');
coder.ceval('pidata_send', obj.fd, obj.packetID, coder.ref(piData_toFluco), obj.size);
piData.h
typedef struct { float velocity [3]; float heading [5]; } piData_toFluco_t;
void pidata_send(int uartsocket, uint8_t packet_id, piData_toFluco_t* packet_ptr, uint8_t size);
piData.c
void pidata_send(int uartsocket, uint8_t packet_id, piData_toFluco_t* packet_ptr, uint8_t size){
uart_send(uartsocket, "\xff\xff\xff\xff", 4); // Start-Byte
uart_send(uartsocket, &packet_id, 1); //Packet ID senden
uart_send(uartsocket, packet_ptr, size); //Payload senden
I'm getting the following error message when compiling:
Simulink detected an error 'coder.ref may only be applied to an expression of type V or V(E) where V is a variable and E is a numeric expression.'.
I would appreciate any help
Cheers Michael
