93 lines
2.3 KiB
JavaScript
93 lines
2.3 KiB
JavaScript
//to run this test you MUST install @uci/i2c which is not a dependency of @uci/mcp
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// npm install @uci/i2c
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const Bus = require('@uci/i2c').Bus,
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MCP = require('../lib/mcp23008-17'),
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expect = require('chai').expect,
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pause = require('@uci/utils').pPause
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let bus = new Bus()
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let ADDR = 0x27
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let CHIP = 'MCP23017'
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let MS = 300 // so humans can watch the lights on boards with leds otherwise set to zero
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let PORT = 'B'
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let id = `${CHIP} at I2C bus address of 0x${ADDR.toString(16)}`
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let mcp = new MCP[CHIP](bus, ADDR, {
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pin_cfg_default: 'output',
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id: id
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});
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describe(
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`Testing Chip ${id}, port: ${PORT}`,
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function () {
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hooks()
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eachpin()
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somepins()
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})
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//****************** TESTS **********************
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function eachpin() {
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it('==> test each pin', async function () {
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for (let pin of mcp.ports[PORT].pins) {
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await mcp.pinsOn(pin.address, PORT)
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let result = await mcp.readPort(PORT)
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expect(result, `pin ${pin.id} at address ${pin.address} write/read failed`).to.equal(pin.address)
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await mcp.pinsOff(pin.address, PORT)
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await pause(MS)
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}
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})
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}
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function somepins() {
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it('==> on, off toggle some pins', async function () {
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let pins = [1, 7, 8]
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await mcp.pinsOn(pins, PORT, 'PLC')
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let shouldbe = [1, 7, 8]
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let result = await mcp.readPort(PORT, { format: 'PLC' })
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expect(result.sort(), 'pin write/read failed on').to.deep.equal(shouldbe.sort())
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await pause(MS)
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pins = [2, 1, 7]
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await mcp.pinsOn(pins, PORT, 'PLC')
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shouldbe = [2, 1, 7, 8]
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result = await mcp.readPort(PORT, { format: 'PLC' })
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expect(result.sort(), 'pin write/read failed on 2').to.deep.equal(shouldbe.sort())
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await pause(MS)
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pins = [2, 1, 6]
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await mcp.toggle(pins, PORT, 'PLC')
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shouldbe = [6, 7, 8]
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result = await mcp.readPort(PORT, { format: 'PLC' })
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expect(result.sort(), 'pin write/read failed toggle').to.deep.equal(shouldbe.sort())
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await pause(MS)
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pins = [2, 1, 6, 7]
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await mcp.pinsOff(pins, PORT, 'PLC')
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shouldbe = [8]
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result = await mcp.readPort(PORT, { format: 'PLC' })
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expect(result.sort(), 'pin write/read failed off').to.deep.equal(shouldbe.sort())
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await pause(MS)
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})
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}
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function hooks() {
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before(async() => {
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await mcp.init()
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})
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beforeEach(async() => {
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await mcp.allOff(PORT) // start clean
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})
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after(async() => {
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await mcp.allOff(PORT) // start clean
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})
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}
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