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Adding comment to explain byte value enum values.

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Evelyn Eastmond 2019-06-14 12:02:51 -04:00
parent 14e8a93ac6
commit 50c80a8abc
1 changed files with 9 additions and 4 deletions
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13
src/extensions/scratch3_ev3/index.js
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@ -67,14 +67,19 @@ const Ev3Opcode = {
* Enum for Ev3 byte values used as arguments to various opcodes.
* Found in the 'EV3 Firmware Developer Kit', section4, page 9, at
* https://education.lego.com/en-us/support/mindstorms-ev3/developer-kits.
*
* The format for these values is:
* 0xxxxxxx for Short Format
* 1ttt-bbb for Long Format
*
* @readonly
* @enum {number}
*/
const Ev3ByteValue = {
NUM8: 0x81, // = 0b10000001 = 1 byte to follow
NUM16: 0x82, // = 0b10000010 = 2 bytes to follow
NUM32: 0x83, // = 0b10000011 = 4 bytes to follow
GLOBAL8: 0xE1 // = 0b11100001 = size of global var - 1 byte to follow
NUM8: 0x81, // = 0b1000-001 = 1 byte to follow
NUM16: 0x82, // = 0b1000-010 = 2 bytes to follow
NUM32: 0x83, // = 0b1000-011 = 4 bytes to follow
GLOBAL8: 0xE1 // = 0b1110-001 = size of global var - 1 byte to follow
};
/**