66 lines
2.0 KiB
TypeScript
66 lines
2.0 KiB
TypeScript
/**
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* Message broadcasting
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*/
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//% weight=70
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//% color="#58AB41"
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namespace broadcast {
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const broadcastEventId = control.allocateNotifyEvent();
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const broadcastDoneEventId = control.allocateNotifyEvent();
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function normalizeId(id: number) {
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// upper ids are reserved for answer
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return ((id + 1) | 0) & 0xffff;
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}
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/**
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* An enum shim
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*/
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//% shim=ENUM_GET
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//% blockId=msg_enum_shim
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//% block="$arg"
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//% enumName="Messages"
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//% enumMemberName="message"
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//% enumPromptHint="e.g. Move, Turn, ..."
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//% enumInitialMembers="message1"
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//% blockHidden=1
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//% enumIsHash=1
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export function __messageShim(arg: number) {
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// This function should do nothing, but must take in a single
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// argument of type number and return a number value.
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return arg;
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}
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/**
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* Register code to run when a message is received
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*/
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//% block="on %id=msg_enum_shim|received"
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//% blockId=broadcastonreceived draggableParameters
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export function onMessageReceived(message: number, body: () => void) {
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const messageid = normalizeId(message);
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control.onEvent(broadcastEventId, messageid, function () {
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body();
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control.raiseEvent(broadcastDoneEventId, messageid);
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})
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}
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/**
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* Sends a message to activate code
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*/
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//% block="send %id=msg_enum_shim"
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//% blockId=broadcastsend draggableParameters
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export function sendMessage(message: number) {
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const messageid = normalizeId(message);
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control.raiseEvent(broadcastEventId, messageid);
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}
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/**
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* Sends a message and pauses until the handler to finishes.
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*/
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//% block="send %id=msg_enum_shim| and pause"
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//% blockId=broadcastsendpause
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export function sendMessageAndPause(message: number) {
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const messageid = normalizeId(message);
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control.raiseEvent(broadcastEventId, messageid);
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control.waitForEvent(broadcastDoneEventId, messageid);
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}
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} |