void CAN_start_transmission_internal(volatile can_stream_data_t* data) {
int i=0;
while ((buffer_bytes_available((buffer_t*)&data->byte_buffer)>0) && i<8) {
data->can_msg.data.u8[i]=buffer_get((buffer_t*)&data->byte_buffer);
i++;
}
if (i==0) { // nothing left to transmit
data->transmission_active=false;
return;
}
/*
if (data->can_channel==0) {
can_bus_init(data->can_channel, ((uint32_t)&mob_ram_ch0[0]), CANIF_CHANNEL_MODE_NORMAL, can_callback0);
} else {
can_bus_init(data->can_channel, ((uint32_t)&mob_ram_ch1[0]), CANIF_CHANNEL_MODE_NORMAL, can_callback1);
}
*/
data->can_mob.handle=CAN_TX_MOB;
data->can_mob.dlc=i;
data->can_msg.id=data->id;
data->can_msg.id_mask = data->id_mask;
data->can_mob.req_type=CAN_DATA_FRAME;
data->transmission_active=true;
can_bus_tx(data->can_channel,
data->can_mob.handle,
data->can_mob.dlc,
data->can_mob.req_type,
data->can_mob.can_msg);
}
bool acoustic_update(audio_t* audio_data)
{
uint8_t buffer[6];
//reset new_data flag
audio_data->new_data = 0;
if (first_run == 0)
{
first_run = 1;
buffer_clear(&(audio_data->audio_buffer));
}
else if (buffer_bytes_available(&(audio_data->audio_buffer)) >= 6)
{
buffer[0] = buffer_get(&(audio_data->audio_buffer));
if (buffer[0] == 254)
{
buffer[1] = buffer_get(&(audio_data->audio_buffer));
buffer[2] = buffer_get(&(audio_data->audio_buffer));
buffer[3] = buffer_get(&(audio_data->audio_buffer));
buffer[4] = buffer_get(&(audio_data->audio_buffer));
buffer[5] = buffer_get(&(audio_data->audio_buffer));
//checksum check
if ((-(buffer[1] + buffer[2] + buffer[3] + buffer[4]) & 0xFF) == buffer[5])
{
audio_data->azimuth = (float)((buffer[1] << 8) | buffer[2]);
audio_data->elevation = (float)((buffer[3] << 8) | buffer[4]);
audio_data->new_data = 1;
buffer_clear(&(audio_data->audio_buffer));
}
}
}
acoustic_process(audio_data);
return true;
}
int CAN_bytes_available(can_stream_data_t *data) {
return buffer_bytes_available(&data->byte_buffer);
}
static ssize_t annotate_write(struct file *file, char const __user *buf, size_t count_orig, loff_t *offset)
{
int pid, cpu, header_size, available, contiguous, length1, length2, size, count = count_orig & 0x7fffffff;
bool interrupt_context;
if (*offset)
return -EINVAL;
interrupt_context = in_interrupt();
/* Annotations are not supported in interrupt context, but may work
* if you comment out the the next four lines of code. By doing so,
* annotations in interrupt context can result in deadlocks and lost
* data.
*/
if (interrupt_context) {
pr_warning("gator: Annotations are not supported in interrupt context. Edit gator_annotate.c in the gator driver to enable annotations in interrupt context.\n");
return -EINVAL;
}
retry:
/* synchronize between cores and with collect_annotations */
spin_lock(&annotate_lock);
if (!collect_annotations) {
/* Not collecting annotations, tell the caller everything was written */
size = count_orig;
goto annotate_write_out;
}
/* Annotation only uses a single per-cpu buffer as the data must be in order to the engine */
cpu = 0;
if (current == NULL)
pid = 0;
else
pid = current->pid;
/* determine total size of the payload */
header_size = MAXSIZE_PACK32 * 3 + MAXSIZE_PACK64;
available = buffer_bytes_available(cpu, ANNOTATE_BUF) - header_size;
size = count < available ? count : available;
if (size <= 0) {
/* Buffer is full, wait until space is available */
spin_unlock(&annotate_lock);
/* Drop the annotation as blocking is not allowed in interrupt context */
if (interrupt_context)
return -EINVAL;
wait_event_interruptible(gator_annotate_wait, buffer_bytes_available(cpu, ANNOTATE_BUF) > header_size || !collect_annotations);
/* Check to see if a signal is pending */
if (signal_pending(current))
return -EINTR;
goto retry;
}
/* synchronize shared variables annotateBuf and annotatePos */
if (per_cpu(gator_buffer, cpu)[ANNOTATE_BUF]) {
u64 time = gator_get_time();
gator_buffer_write_packed_int(cpu, ANNOTATE_BUF, get_physical_cpu());
gator_buffer_write_packed_int(cpu, ANNOTATE_BUF, pid);
gator_buffer_write_packed_int64(cpu, ANNOTATE_BUF, time);
gator_buffer_write_packed_int(cpu, ANNOTATE_BUF, size);
/* determine the sizes to capture, length1 + length2 will equal size */
contiguous = contiguous_space_available(cpu, ANNOTATE_BUF);
if (size < contiguous) {
length1 = size;
length2 = 0;
} else {
length1 = contiguous;
length2 = size - contiguous;
}
if (annotate_copy(file, buf, length1) != 0) {
size = -EINVAL;
goto annotate_write_out;
}
if (length2 > 0 && annotate_copy(file, &buf[length1], length2) != 0) {
size = -EINVAL;
goto annotate_write_out;
}
/* Check and commit; commit is set to occur once buffer is 3/4 full */
buffer_check(cpu, ANNOTATE_BUF, time);
}
annotate_write_out:
spin_unlock(&annotate_lock);
/* return the number of bytes written */
return size;
}