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The DMX*LEV Lighting System
A DMX512/RDM512 Controlled Light Electric Vehicle Lighting System by Moxon Design


We'll give an overview of the firmware here, as well as the defintions of the DMX*LEV system addressing and control functions.
Erwin Rol gives a good overview of the DMX512 protocol, which I would recommend reading before you try to understand what is going on here. Below is a depiction of a DMX512 data frame :


As the name implies there are 512 DMX channels, each of which gives you one byte of control information per channel. (And yes you can use two (2) channels if you need sixteen (16) bits of data.) So for most DMX systems, you need to know the channel mapping to determine how things are controlled. The DMX*LEV controller uses thirty-two (32) channels for the switch information, such as the throttle setting, the headlight dimmer setting, etc. These thirty-two (32) channels are considered "global" as any of the lights can respond to one of those switch channels actively.

In general however, the lights are passive, meaning that they just listen to a specific DMX channel that tells them their brightness. It is the DMX*LEV controller that determines what light(s) should be triggered based on a specific switch setting, or a combination of switches.

DMX/RDM512 Channel Assignments

    Reserved Group
  1. Reserved
  2. Reserved
  3. Reserved
  4. Reserved
  5. Reserved
  6. Reserved
  7. Reserved
  8. Reserved


    9. Switch Group 1
  9. Brake Switch
  10. Throttle
  11. Turn Right Switch
  12. Turn Left Switch
  13. Light Switch
  14. Horn Switch
  15. Key Switch
  16. Backup Switch


    17. Switch Group 2
  17. Kill Switch
  18. Hibeam Switch
  19. RPM Right Rear Wheel
  20. RPM Left Rear Wheel
  21. RPM Right Front Wheel
  22. RPM Left Front Wheel
  23. Cadence RPM
  24. Foglight Switch


    25. Switch Group 3
  25. Cruise Control On/Off Switch
  26. Cruise Control + Switch
  27. Cruise Control - Switch
  28. Alarm Switch
  29. Accessory 1 Switch
  30. Wiper1 Switch
  31. Wiper2 Switch
  32. Hazard Switch


    33. Switch Group 4
  33. Reserved
  34. Reserved
  35. Reserved
  36. Reserved
  37. Reserved
  38. Reserved
  39. Reserved
  40. Reserved


    41. Tail Light (Center) Group
  41. Brake Light
  42. Acceleration Light
  43. Turn Right Signal Light
  44. Turn Left Signal Light
  45. Bottom Running Light
  46. Middle Running Light
  47. Top Running Light
  48. Backup/Reverse Light


    49. Head Light (Center) Group
  49. Head Light
  50. Hibeam Light
  51. Turn Right Signal Light
  52. Turn Left Signal Light
  53. Bottom Running Light
  54. Middle Running Light
  55. Top Running Light
  56. Fog Light


    57. Tail Light (Left) Group
  57. Brake Light
  58. Acceleration Light
  59. Turn Right Signal Light
  60. Turn Left Signal Light
  61. Bottom Running Light
  62. Middle Running Light
  63. Top Running Light
  64. Backup/Reverse Light


    65. Head Light (Left) Group
  65. Head Light
  66. Hibeam Light
  67. Turn Right Signal Light
  68. Turn Left Signal Light
  69. Bottom Running Light
  70. Middle Running Light
  71. Top Running Light
  72. Fog Light


    73. Tail Light (Right) Group
  73. Brake Light
  74. Acceleration Light
  75. Turn Right Signal Light
  76. Turn Left Signal Light
  77. Bottom Running Light
  78. Middle Running Light
  79. Top Running Light
  80. Backup/Reverse Light


    81. Head Light (Right) Group
  81. Head Light
  82. Hibeam Light
  83. Turn Right Signal Light
  84. Turn Left Signal Light
  85. Bottom Running Light
  86. Middle Running Light
  87. Top Running Light
  88. Fog Light


    89. Side Light (Center Left) Group
  89. Upper Accent Light
  90. Lower Accent Light
  91. Turn Right Signal Light
  92. Turn Left Signal Light
  93. Bottom Running Light
  94. Middle Running Light
  95. Top Running Light
  96. Down Light


    97. Side Light (Center Right) Group
  97. Upper Accent Light
  98. Lower Accent Light
  99. Turn Right Signal Light
  100. Turn Left Signal Light
  101. Bottom Running Light
  102. Middle Running Light
  103. Top Running Light
  104. Down Light


    105. Side Light (Front Left) Group
  105. Upper Accent Light
  106. Lower Accent Light
  107. Turn Right Signal Light
  108. Turn Left Signal Light
  109. Bottom Running Light
  110. Middle Running Light
  111. Top Running Light
  112. Down Light


    113. Side Light (Front Right) Group
  113. Upper Accent Light
  114. Lower Accent Light
  115. Turn Right Signal Light
  116. Turn Left Signal Light
  117. Bottom Running Light
  118. Middle Running Light
  119. Top Running Light
  120. Down Light


    121. Side Light (Rear Left) Group
  121. Upper Accent Light
  122. Lower Accent Light
  123. Turn Right Signal Light
  124. Turn Left Signal Light
  125. Bottom Running Light
  126. Middle Running Light
  127. Top Running Light
  128. Down Light


    129. Side Light (Rear Right) Group
  129. Upper Accent Light
  130. Lower Accent Light
  131. Turn Right Signal Light
  132. Turn Left Signal Light
  133. Bottom Running Light
  134. Middle Running Light
  135. Top Running Light
  136. Down Light

Now we don't really imagine that someone will have all of those lights simulataineously (well, we might just try it...), but the idea is to support different configurations for addressing blink and chase patterns.

As we get closer to releasing the DMX*LEV lighting system, we'll put some more information about the firmware here. The firmware is based on a simple interrupt driven state machine, using the DMX512 bus state as the controlling mechanism.

 
 
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