This library is needed to place in a unique structure the data to be shared between microcontrollers.
- NUCLEO-H745ZI-Q
intercom_init: initializes the structureintercom_tthat contains the entries and their number.intercom_serialize: prepares the entries to be sent.intercom_deserialize: prepares the entries to be received.
- In your main, include
lib_intercom.h - Create an instance of
intercom_tto be used as the handler and afterwards create an array ofintercom_entry_t(intercom_entry_t entries[]={entry1, entry2...}) and add all the variables you want to send or receive (order matters). For each entry, define.var: pointer to the variable to be sent.sz :size of the variable.is_mem: 1 if the variable is already a memory address, 0 if it's not.
For example:
intercom_t h;
uint8_t h_data[] = { 1, 4, 3 ,4, 5, 6, 7, 8, 9, 10, 11 };
uint32_t h_v1 = 0x12345678;
uint16_t h_v2 = 0xAABB;
uint8_t h_v3 = 0xCC;
intercom_entry_t h_entries[] =
{
{.var = &h_v1, .sz = 4, .is_mem = 0},
{.var = &h_v2, .sz = 2, .is_mem = 0},
{.var = &h_v3, .sz = 1, .is_mem = 0},
{.var = h_data, .sz = 11, .is_mem = 1},
};- Use the functions
intercom_serialize: To serialize theentriesinto the givenbufferintercom_deserialize: To deserialize the givenbufferinto theentries
intercom_serialize(&h, output_buffer, &output_buffer_size);
intercom_deserialize(&h, input_buffer ,&input_buffer_size);In this example, data is prepared to be sent and saved in a buffer (used as buffer_send).
The same buffer is then used as buffer_read in a "deserialize" function.
#include <stdio.h>
#include "lib_intercom.h"
uint8_t h1_data[] = { 1, 4, 3 ,4, 5, 6, 7, 8, 9, 10, 11 };
uint32_t h1_v1 = 0x12345678;
uint16_t h1_v2 = 0xAABB;
uint8_t h1_v3 = 0xCC;
uint8_t h2_data[11] = { 0 };
uint32_t h2_v1 = 0;
uint16_t h2_v2 = 0;
uint8_t h2_v3 = 0;
intercom_t h1,h2; //structures for sent and received data
intercom_entry_t h1_entries[] = {
{.var = &h1_v1, .sz = 4, .is_mem = 0},
{.var = &h1_v2, .sz = 2, .is_mem = 0},
{.var = &h1_v3, .sz = 1, .is_mem = 0},
{.var = h1_data, .sz = 11, .is_mem = 1},
}; //entries to be sent
intercom_entry_t h2_entries[] = {
{.var = &h2_v1, .sz = 4, .is_mem = 0},
{.var = &h2_v2, .sz = 2, .is_mem = 0},
{.var = &h2_v3, .sz = 1, .is_mem = 0},
{.var = h2_data, .sz = 11, .is_mem = 1},
}; //received entries go there
uint8_t sd_buffer[22] = {0}; //buffer to store the sent data
// or read the received data
uint32_t sd_buffer = 0;
int main(void)
{
intercom_init(&h1, h1_entries, 4);
intercom_init(&h2, h2_entries, 4);
intercom_serialize(&h1, sd_buffer, &buffer_size);
intercom_deserialize(&h2, sd_buffer,NULL);
return 0;
}