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How to create good software interface ?

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jani12

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Our embedded target board is based on Renesas RH850F1L Microcontroller. Our language is 'C'.
A software library creates a instance of this structure and provides me a pointer to this structure. What is a good application interface that can be used to provide d0.Fact and d1.Fact to application periodically?
Code: 
typedef struct {
               unsigned short  count;
               unsigned short  hold;
               unsigned char    Fact;
} LtRXData;

typedef struct {
   unsigned short  speed;
   LtRXData  d0;
   LtRXData  d1;
} LtRData;
A software library creates instance of this structure and provides me pointer to the structure. What is a good application interface that can be used to provide d0_s1.Fact, d0_s2.Fact, d0_s3.Fact, d1_s1.Fact, d1_s2.Fact, and d1_s3.Fact to application periodically?
Code: 
typedef struct {
   unsigned short  count;
   unsigned short  hold;
   unsigned char   Fact;
} LtSXData;

typedef struct {
   unsigned short speed;
   LtSXData  d0_s1;
   LtSXData  d0_s2;
   LtSXData  d0_s3;
   LtSXData  d1_s1;
   LtSXData  d1_s2;
   LtSXData  d1_s3;
} LtSData;
 
Last edited by a moderator:

you can search for DMA direct memory access. or may be you can use message queue.
 

Can't undestand what both of you means. How DMA is related to s/w interface and what for you wanna use the structures.
 

I also don't understand how DMA can be used to create software interface implementation.

I ended up using arrays. Application software instantiates array of structure. They pass me pointer to first element of the array and I use it to populate the array.

I would be interested to know how queue could be used to achieve this.

Structure is used because when system is running, many related data are stored.
 

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