When I define an enum say
typedef enum {
VALUE,
VALUE2,
VALUE3
}myEnum;
With regard to the differences between CPU and CLA where ptrs are 16 vs 32 bits, and ints are treated differently on the two processors, when I use an ENUM across the two processors, is it using an incompatible type across the processors? I seem to be observing a location mismatch when using enums across the CPU/CLA...
Can I specify that it use unsigned longs for the enums or some compatible type across the processors?
Rob,
enums take on the type int. Since ints are different sizes on the CLA(32-bits) and C28 (16-bits) the cores are going to access them differently. This issue had come up before 
and we discussed it internally and came up with the following solution at the time. I think it applies now as well,
"
In the shared header file, declare
//
// Globals
//
typedef union{
enum
{
Done=0,
Init,
Start,
Rampup,
Rampdown,
}enum_t;
int32_t pad;
}MOSPROF_State;
extern MOSPROF_State state;
on the C28x side, in main() I tried
state.enum_t = Done;
state.enum_t = sizeof(MOSPROF_State);
which gives me
;----------------------------------------------------------------------
; 68 | state.enum_t = Done;
;----------------------------------------------------------------------
MOVW DP,#_state ; [CPU_U]
MOV @_state,#0 ; [CPU_] |68|
----------------------------------------------------------------------
; 69 | state.enum_t = sizeof(MOSPROF_State);
;----------------------------------------------------------------------
MOVB @_state,#2,UNC ; [CPU_] |69|
On the CLA side, I did something similar
state.enum_t = Rampup;
state.enum_t = sizeof(MOSPROF_State);
which gave me
;----------------------------------------------------------------------
; 44 | state.enum_t = Rampup;
;----------------------------------------------------------------------
MMOVIZ MR0,#0 ; [CPU_] |44|
MMOVXI MR0,#3 ; [CPU_] |44|
MMOV32 @_state,MR0 ; [CPU_] |44|
.dwpsn file "C:/Users/a0272561/Repositories/c2000_driverlib/test/f28004x/cla/cla_accessible_functions_unit_test/source/driver_test.cla",line 45,column 2,is_stmt,isa 0
;----------------------------------------------------------------------
; 45 | state.enum_t = sizeof(MOSPROF_State);
; 46 | // Enable the Software Interrupt ability for task 1
;----------------------------------------------------------------------
MMOVIZ MR0,#0 ; [CPU_] |45|
MMOVXI MR0,#2 ; [CPU_] |45|
MMOV32 @_state,MR0 ; [CPU_] |45|
In both cases the size of this new enum was 32-bits
"