nebel/node-web-i2c
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Nebel 2020-06-25 11:45:56 +09:00
parent 4dd786679b
commit 64278cb7fa
1 changed files with 7 additions and 6 deletions
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13
index.js
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@ -1,5 +1,6 @@
"use strict"; "use strict";
Object.defineProperty(exports, "__esModule", { value: true }); Object.defineProperty(exports, "__esModule", { value: true });
exports.requestI2CAccess = exports.OperationError = exports.I2CPort = exports.I2CPortMap = exports.I2CAccess = void 0;
const i2c_bus_1 = require("i2c-bus"); const i2c_bus_1 = require("i2c-bus");
const I2CPortMapSizeMax = 32; const I2CPortMapSizeMax = 32;
const Uint16Max = 65535; const Uint16Max = 65535;
@ -38,15 +39,15 @@ class I2CPort {
return `i2c-${this.portNumber}`; return `i2c-${this.portNumber}`;
} }
async open(slaveAddress) { async open(slaveAddress) {
const bus = await i2c_bus_1.openPromisified(this.portNumber).catch(error => { const bus = await i2c_bus_1.openPromisified(this.portNumber).catch((error) => {
throw new OperationError(error); throw new OperationError(error);
}); });
return { return {
slaveAddress, slaveAddress,
read8: cmd => bus.readByte(slaveAddress, cmd).catch(error => { read8: (cmd) => bus.readByte(slaveAddress, cmd).catch((error) => {
throw new OperationError(error); throw new OperationError(error);
}), }),
read16: cmd => bus.readWord(slaveAddress, cmd).catch(error => { read16: (cmd) => bus.readWord(slaveAddress, cmd).catch((error) => {
throw new OperationError(error); throw new OperationError(error);
}), }),
write8: async (cmd, byte) => { write8: async (cmd, byte) => {
@ -106,7 +107,7 @@ class I2CPort {
catch (error) { catch (error) {
throw new OperationError(error); throw new OperationError(error);
} }
} },
}; };
} }
} }
@ -119,9 +120,9 @@ class OperationError extends Error {
} }
exports.OperationError = OperationError; exports.OperationError = OperationError;
async function requestI2CAccess() { async function requestI2CAccess() {
const ports = new I2CPortMap([...Array(I2CPortMapSizeMax).keys()].map(portNumber => [ const ports = new I2CPortMap([...Array(I2CPortMapSizeMax).keys()].map((portNumber) => [
portNumber, portNumber,
new I2CPort(portNumber) new I2CPort(portNumber),
])); ]));
return new I2CAccess(ports); return new I2CAccess(ports);
} }