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dfu.js: send SET_INTERFACE request for alternate 0 #15

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Merged
merged 1 commit into from
Jun 26, 2021
Merged

dfu.js: send SET_INTERFACE request for alternate 0 #15

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14 changes: 12 additions & 2 deletions dfu-util/dfu.js
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Original file line number Diff line number Diff line change
Expand Up @@ -109,8 +109,18 @@ var dfu = {};
const altSetting = this.settings.alternate.alternateSetting;
let intf = this.device_.configuration.interfaces[intfNumber];
if (intf.alternate === null ||
intf.alternate.alternateSetting != altSetting) {
await this.device_.selectAlternateInterface(intfNumber, altSetting);
intf.alternate.alternateSetting != altSetting ||
intf.alternates.length > 1) {
try {
await this.device_.selectAlternateInterface(intfNumber, altSetting);
} catch (error) {
if (intf.alternate.alternateSetting == altSetting &&
error.endsWith("Unable to set device interface.")) {
this.logWarning(`Redundant SET_INTERFACE request to select altSetting ${altSetting} failed`);
} else {
throw error;
}
}
}
}

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