C++ (Cpp) ring_buffer_remaining_entries Examples

Example #1

File: mip_sdk_inteface.c Project: JackDoan/ILC_C

u16 mip_interface_update(mip_interface *device_interface)
{
 u32 num_bytes, bytes_read = 0, bytes_written = 0;
 u8  local_buffer[MIP_INTERFACE_INPUT_RING_BUFFER_SIZE];
 u32 port_bytes;
 
 //The parser must be initialized
 if(device_interface->state != MIP_INTERFACE_INITIALIZED)
  return MIP_INTERFACE_ERROR;
 
 //Determine the max number of bytes to read
 num_bytes = MIP_INTERFACE_INPUT_RING_BUFFER_SIZE;
 
 if(ring_buffer_remaining_entries(&device_interface->input_buffer) < num_bytes)
  num_bytes = ring_buffer_remaining_entries(&device_interface->input_buffer);
 
 port_bytes = mip_sdk_port_read_count(device_interface->port_handle);
 
 if(num_bytes > port_bytes)
  num_bytes = port_bytes;
 
 
 //Read up to max ring buffer size from the port
 if(num_bytes > 0)
  mip_sdk_port_read(device_interface->port_handle, local_buffer, num_bytes, &bytes_read, MIP_INTERFACE_PORT_READ_TIMEOUT_MS);

 //Write the local buffer to the ring buffer
 if(bytes_read > 0)
 { 
  //printf("Got %d bytes\n", bytes_read);
  ring_buffer_write_multi(&device_interface->input_buffer, local_buffer, bytes_read, &bytes_written);
 }
 
 //Parse the data
 __mip_interface_parse_input_buffer(device_interface);
 
 
 return MIP_INTERFACE_OK;
}

Example #2

File: mip_sdk_interface.c Project: AeroChen/unmanned-aerial-surveillance

u16 mip_interface_write_blocking(mip_interface *device_interface, u8 *data, u32 num_bytes, u32 *bytes_written, u32 timeout_ms)
{
 u32 initial_time = mip_sdk_get_time_ms();
 
 //Check that the parser is initialized
 if(device_interface->state != MIP_INTERFACE_INITIALIZED)
   return MIP_INTERFACE_ERROR;

 //Cannot write more bytes than the buffer size
 if(num_bytes > MIP_INTERFACE_INPUT_RING_BUFFER_SIZE)
   return MIP_INTERFACE_ERROR;
 
 //Spin until the buffer has enough room 
 while(num_bytes > ring_buffer_remaining_entries(&device_interface->input_buffer))
 {
  if(__mip_interface_time_timeout(initial_time, timeout_ms) == MIP_INTERFACE_TIMEOUT)
    return MIP_INTERFACE_ERROR;
 }  
  
 return mip_interface_write(device_interface, data, num_bytes, bytes_written);  
}