AVR-Chat

I agree with Clark on the pointer issue.  The & should be * in the 
function declaration.

Charlie

On 2/2/2013 4:17 PM, englsprogeny1 wrote:
>
> I've updated the struct, thanks.
>
> I want to be able to update the values within the struct (depending on what 'instance' is passed into the function).
>
> This is why I am doing 'pass by reference' (by the address)
>
>
> I get the following error:
>
> menu.c:1732: error: expected ';', ',' or ')' before '&' token
>
> This is referring to the prototype portion of the function definition.
>
>   
>
> void CalculateOffTime(uint8_t duration, offTimeStruct &eventOff)
>
>
>
> Any more ideas?
>
>
>
> --- In AVR-Chat@yahoogroups.com, Charlie H  wrote:
>> It looks like you are expecting the address of the struct passed to your
>> function but not using the address in the function.  Try it this way:
>>
>> void CalculateOffTime(uint8_t duration, offTimeStruct eventOff)
>> {
>>      ...
>> }
>>
>>
>> Also, I think the typedef is wrong.  Try it this way:
>>
>> typedef struct
>> {
>> 	uint8_t endMinute;
>> 	uint8_t endHour;
>> } offTimeStruct;
>>
>>
>> HTH,
>> Charlie
>>
>>
>> On 2/2/2013 2:51 PM, englsprogeny1 wrote:
>>> Simple C question.. I guess that I am blowing!  Maybe I didn't get enough sleep last night....
>>>
>>>
>>> Using AVR Studio 4.0 with GCC
>>>
>>> 1. I create a type that is a struct
>>> 2. I create multiple 'instances' of this type.
>>>
>>>
>>> I get the following errors when I Build All:
>>>
>>> menu.c:1729: error: expected declaration specifiers or '...' before 'offTimeStruct'
>>> menu.c:1742: error: 'eventOff' undeclared (first use in this function)
>>>
>>>
>>>
>>>
>>> typedef struct offTimeStruct
>>> {
>>> 	uint8_t endMinute;
>>> 	uint8_t endHour;
>>> };
>>>
>>> offTimeStruct light1;
>>> offTimeStruct rocket;
>>>
>>>
>>>
>>> //menu.c: Line 1729
>>> void CalculateOffTime(uint8_t duration, offTimeStruct &eventOff)
>>> {
>>>           //menu.c: Line 1742
>>> 	eventOff.endMinute = 1;
>>>
>>> }
>>>
>>>
>>>
>>>
>>> funtion call from Main()
>>>
>>>
>>> CalculateOffTime(1, light1);
>>>
>>> Thanks for your ideas guys!
>>>
>>>
>>>
>>>
>>>
>>> ------------------------------------
>>>
>>> Yahoo! Groups Links
>>>
>>>
>>>
>>>
>
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