117 lines
2.6 KiB
C++
117 lines
2.6 KiB
C++
// #include "dmx_buffers.h"
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unsigned long tic_loop = 0;
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unsigned long time_since_last_sync;
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const unsigned long SYNC_TIMEOUT = 1000;
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const unsigned int FRAME_TIME = 20; // 20 ms -> 50 FPS
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DMXTripleBuffer buffer;
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bool packet_ready = true;
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unsigned long pkt_count = 0, oof_ctr = 0, foo_ctr = 0;
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void setup()
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{
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Serial.begin(500000); // USB
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Serial.setRxBufferSize(512); // to fit the full DMX packet. (default is 128)
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while (!Serial)
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{
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// spin until serial is up
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}
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// DBG
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// Serial.println("SANITY CHECK AAAAAAAAAAAAAAAAAAAA");
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// Serial.printf("drain_pos: %d\nstd::min(128, 512-drain_pos): %d\n", buffer.drain_pos, std::min((size_t) 128, 512-buffer.drain_pos));
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Serial1.begin(250000, SERIAL_8N2); // DMX
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while (!Serial1)
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{
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// spin until serial1 is up
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}
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// Serial.printf("Is this stupid? %d %X %X\n", Serial1.availableForWrite(), USS(0), USS(1));
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Serial.println();
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Serial.println("Sync.");
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time_since_last_sync = millis();
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}
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void loop()
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{
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// output
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if (packet_ready)
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{
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send_dmx_header();
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packet_ready = false;
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pkt_count += 1;
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}
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size_t n = Serial1.availableForWrite();
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if (!n) {
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oof_ctr += 1;
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} else {
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foo_ctr += 1;
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}
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size_t written = Serial1.write(
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buffer.drain_buffer->data + buffer.drain_pos,
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std::min(n, 512 - buffer.drain_pos));
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buffer.drain_pos += written;
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if (buffer.drain_pos == 512)
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{
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buffer.on_drain_complete();
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packet_ready = true;
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}
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// input
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n = Serial.available();
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unsigned long now = millis();
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if (!n)
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{
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if (now - time_since_last_sync > 1000)
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{
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buffer.fill_pos = 0;
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Serial.println("Sync.");
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// Serial.printf("(pkts: %lu, fill: %d, drain: %d, foo: %lu, oof: %lu)\n", pkt_count, buffer.fill_pos, buffer.drain_pos, foo_ctr, oof_ctr);
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time_since_last_sync = now;
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}
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return;
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}
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time_since_last_sync = now;
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size_t read = Serial.read(
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buffer.fill_buffer->data + buffer.fill_pos,
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std::min(n, 512 - buffer.fill_pos));
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buffer.fill_pos += read;
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if (buffer.fill_pos == 512)
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{
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buffer.on_fill_complete();
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Serial.println("Ack.");
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}
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}
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void send_dmx_header()
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{
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Serial1.flush();
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Serial1.begin(90000, SERIAL_8N2);
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// send the break as a "slow" byte
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Serial1.write(0);
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// switch back to the original baud rate
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Serial1.flush();
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Serial1.begin(250000, SERIAL_8N2);
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Serial1.write(0); // Start-Byte
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} |