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Cleanup

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This commit is contained in:
Kai Vogelgesang 2021-08-30 10:18:31 +02:00
parent 0260c3bb6b
commit f9e969e6e8
Signed by: kai
GPG Key ID: 0A95D3B6E62C0879
1 changed files with 31 additions and 20 deletions
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41
microcontroller/test.ino
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@ -19,7 +19,8 @@
} }
*/ */
struct InternalBuffer { struct InternalBuffer
{
char data[512] = {0}; char data[512] = {0};
bool is_fresh = false; bool is_fresh = false;
}; };
@ -27,23 +28,26 @@ struct InternalBuffer {
class DMXTripleBuffer class DMXTripleBuffer
{ {
public: public:
DMXTripleBuffer()
DMXTripleBuffer() { {
fill_buffer = &_buffers[0]; fill_buffer = &_buffers[0];
drain_buffer = &_buffers[1]; drain_buffer = &_buffers[1];
off_buffer = &_buffers[2]; off_buffer = &_buffers[2];
} }
void on_fill_complete() { void on_fill_complete()
{
fill_pos = 0; fill_pos = 0;
fill_buffer->is_fresh = true; fill_buffer->is_fresh = true;
std::swap(fill_buffer, off_buffer); std::swap(fill_buffer, off_buffer);
} }
void on_drain_complete() { void on_drain_complete()
{
drain_pos = 0; drain_pos = 0;
drain_buffer->is_fresh = false; drain_buffer->is_fresh = false;
if (off_buffer->is_fresh) { if (off_buffer->is_fresh)
{
std::swap(drain_buffer, off_buffer); std::swap(drain_buffer, off_buffer);
} }
} }
@ -58,18 +62,17 @@ private:
Some globals Some globals
*/ */
DMXTripleBuffer buffer; // Triple buffer instance
bool packet_ready = true; // flag to write header
// send a "Sync." every second if no data is coming in
unsigned long time_since_last_sync; unsigned long time_since_last_sync;
const unsigned long SYNC_TIMEOUT = 1000; const unsigned long SYNC_TIMEOUT = 1000;
const unsigned int FRAME_TIME = 20; // 20 ms -> 50 FPS
DMXTripleBuffer buffer;
bool packet_ready = true;
unsigned long pkt_count = 0;
/* /*
main setup
initialize both Serial connections and write the initial "Sync."
*/ */
void setup() void setup()
@ -92,6 +95,15 @@ void setup()
time_since_last_sync = millis(); time_since_last_sync = millis();
} }
/*
loop
continuously poll Serial1 for writing and Serial for reading
only read/write as much as fits into the UART buffers to avoid blocking
since Serial1 is set to 250000 baud, it should be able to write 50 DMX packets per second
*/
void loop() void loop()
{ {
@ -101,7 +113,6 @@ void loop()
{ {
send_dmx_header(); send_dmx_header();
packet_ready = false; packet_ready = false;
pkt_count += 1;
} }
size_t n = Serial1.availableForWrite(); size_t n = Serial1.availableForWrite();