From e0bb0bcca338853aa4a1fe600bd4fcc79adf3640 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A1szl=C3=B3=20Monda?= <laci@monda.hu>
Date: Tue, 30 Jan 2018 17:21:50 +0100
Subject: [PATCH] Add the async uhk.writeDevice() and use it in
 get-i2c-baud-rate.js

---
 packages/usb/get-i2c-baud-rate.js | 15 ++++++---------
 packages/usb/uhk.js               |  7 +++++++
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/packages/usb/get-i2c-baud-rate.js b/packages/usb/get-i2c-baud-rate.js
index adfd6e46..4043d382 100755
--- a/packages/usb/get-i2c-baud-rate.js
+++ b/packages/usb/get-i2c-baud-rate.js
@@ -1,13 +1,10 @@
 #!/usr/bin/env node
-const path = require('path');
 const uhk = require('./uhk');
 const device = uhk.getUhkDevice();
 
-let buffer = new Buffer([uhk.usbCommands.getDeviceProperty, uhk.devicePropertyIds.i2cBaudRate]);
-//console.log(buffer);
-device.write(uhk.getTransferData(buffer));
-let response = device.readSync();
-//console.log(Buffer.from(response));
-let requestedBaudRate = uhk.getUint32(response, 2);
-let actualBaudRate = uhk.getUint32(response, 6);
-console.log(`requestedBaudRate:${requestedBaudRate} | actualBaudRate:${actualBaudRate} | I2C0_F:0b${response[1].toString(2).padStart(8, '0')}`)
+(async function() {
+    let response = await uhk.writeDevice(device, [uhk.usbCommands.getDeviceProperty, uhk.devicePropertyIds.i2cBaudRate]);
+    let requestedBaudRate = uhk.getUint32(response, 2);
+    let actualBaudRate = uhk.getUint32(response, 6);
+    console.log(`requestedBaudRate:${requestedBaudRate} | actualBaudRate:${actualBaudRate} | I2C0_F:0b${response[1].toString(2).padStart(8, '0')}`)
+})();
diff --git a/packages/usb/uhk.js b/packages/usb/uhk.js
index 414de70a..0dacb6fb 100644
--- a/packages/usb/uhk.js
+++ b/packages/usb/uhk.js
@@ -1,3 +1,4 @@
+const util = require('util');
 const HID = require('node-hid');
 // const debug = process.env.DEBUG;
 const debug = true;
@@ -26,6 +27,11 @@ function uint32ToArray(value) {
     return [(value >> 0) & 0xff, (value >> 8) & 0xff, (value >> 16) & 0xff, (value >> 24) & 0xff];
 }
 
+function writeDevice(device, data, options={}) {
+    device.write(getTransferData(new Buffer(data)));
+    return util.promisify(device.read.bind(device))();
+}
+
 function getUhkDevice() {
     const foundDevice = HID.devices().find(device =>
         device.vendorId === 0x1d50 && device.productId === 0x6122 &&
@@ -72,6 +78,7 @@ exports = module.exports = moduleExports = {
     getUint16,
     getUint32,
     uint32ToArray,
+    writeDevice,
     getUhkDevice,
     getBootloaderDevice,
     getTransferData,