Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Thu, 17 Jun 2021 16:28:17 -0700 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 15HNIcWu024722; Thu, 17 Jun 2021 19:19:21 -0400 Received: from outgoing-exchange-3.mit.edu (OUTGOING-EXCHANGE-3.MIT.EDU [18.9.28.13]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 15HNIaER024719 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Thu, 17 Jun 2021 19:18:36 -0400 Received: from oc11exedge2.exchange.mit.edu (OC11EXEDGE2.EXCHANGE.MIT.EDU [18.9.3.18]) by outgoing-exchange-3.mit.edu (8.14.7/8.12.4) with ESMTP id 15HNHTGV012697 for ; Thu, 17 Jun 2021 19:18:36 -0400 Received: from oc11expo30.exchange.mit.edu (18.9.4.103) by oc11exedge2.exchange.mit.edu (18.9.3.18) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Thu, 17 Jun 2021 19:17:50 -0400 Received: from oc11exhyb8.exchange.mit.edu (18.9.1.113) by oc11expo30.exchange.mit.edu (18.9.4.103) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 17 Jun 2021 19:17:59 -0400 Received: from NAM02-DM3-obe.outbound.protection.outlook.com (104.47.56.41) by oc11exhyb8.exchange.mit.edu (18.9.1.113) with Microsoft SMTP Server (TLS) id 15.0.1497.18 via Frontend Transport; Thu, 17 Jun 2021 19:17:59 -0400 Received: from DS7PR03CA0054.namprd03.prod.outlook.com (2603:10b6:5:3b5::29) by SN6PR01MB4304.prod.exchangelabs.com (2603:10b6:805:a6::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4219.24; Thu, 17 Jun 2021 23:17:58 +0000 Received: from DM6NAM11FT015.eop-nam11.prod.protection.outlook.com (2603:10b6:5:3b5:cafe::61) by DS7PR03CA0054.outlook.office365.com (2603:10b6:5:3b5::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4242.18 via Frontend Transport; Thu, 17 Jun 2021 23:17:58 +0000 Received: from mail-wr1-f41.google.com (209.85.221.41) by DM6NAM11FT015.mail.protection.outlook.com (10.13.172.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4242.16 via Frontend Transport; Thu, 17 Jun 2021 23:17:58 +0000 Received: by mail-wr1-f41.google.com with SMTP id c5so8530257wrq.9 for ; Thu, 17 Jun 2021 16:17:58 -0700 (PDT) Received: from raspberry (cpc113460-oxfd27-2-0-cust322.4-3.cable.virginm.net. [86.24.157.67]) by smtp.gmail.com with ESMTPSA id b8sm9425135wmd.35.2021.06.17.16.17.56 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Jun 2021 16:17:57 -0700 (PDT) From: Alan Pearce To: "piclist@mit.edu" Sender: "piclist-bounces@mit.edu" Date: Thu, 17 Jun 2021 16:17:54 -0700 Subject: Re: [EE] Driving large RGB TFT displays Thread-Topic: [EE] Driving large RGB TFT displays Thread-Index: Addj0HPG3DbehGbuT/+Jwg4ihItIug== Message-ID: <20210618001754.1ac42f0d@raspberry> References: <02873f88-63df-6170-2f64-4a78c21f1881@narwani.org> <20210617194651.3a2f368c@raspberry> <0373770a-b760-0aa4-8c23-3bcd8da1e9ee@narwani.org> List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: <0373770a-b760-0aa4-8c23-3bcd8da1e9ee@narwani.org> Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of googlemail.com designates 209.85.221.41 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.221.41; helo=mail-wr1-f41.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20161025; h=from:date:to:subject:message-id:in-reply-to:references:organization :mime-version:content-transfer-encoding; bh=13Esu8kxXZpr5PSEw7Lokp6W7wzdGCAjD5Z0iQnjazA=; b=PmUy0GwHKRS6XuV0SwHTQ4BS/zh9OKUIESldG0gAv2AuHk9OoApCYV+rQAADsX3pZQ ROBIll96N5KdUkbjllp7GmQA6IVAGRMiyZ89WLMnQXh+EVJfgCBTTZADZgc/7gkkOzlG xqxfa38yD6mxoQKQvVdDB9fkGJSdPjLCatjLvo5osUBgaUXRPU0h3KlnW26/CRAkMNqP 0geyx29bA4uneIpqTXtN5QAHk48FbynlomJNgj3j+3dp2obbY/6ELGM5A5N3mFbmre/N evSkZihAk3iDlV4r2edQNxLfCzHZOZM/M5YfHCfm+/ytvOit1Cvv4/S31kSO4Lpw7I7i +6CA== authentication-results: spf=pass (sender IP is 209.85.221.41) smtp.mailfrom=googlemail.com; mit.edu; dkim=pass (signature was verified) header.d=googlemail.com;mit.edu; dmarc=pass action=none header.from=googlemail.com; errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:a5d:6e0d:: with SMTP id h13mr9014257wrz.118.1623971877184; Thu, 17 Jun 2021 16:17:57 -0700 (PDT) x-topics: [EE] x-mime-autoconverted: from quoted-printable to 8bit by PCH.mit.edu id 15HNIaER024719 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 T24gVGh1LCAxNyBKdW4gMjAyMSAxNjo1Mjo1NiAtMDQwMApOZWlsIDxwaWNkdWRlM0BuYXJ3YW5p Lm9yZz4gd3JvdGU6Cgo+IE9uIDYvMTcvMjAyMSAyOjQ2IFBNLCBBbGFuIFBlYXJjZSB3cm90ZToK PiA+Cj4gPiBGb3IgdGhhdCBzaXplIGRpc3BsYXkgaSBkb24ndCB0aGluayB5b3Ugd2lsbCBmaW5k IGFuIFJHQiBwYXJhbGxlbAo+ID4gaW50ZXJmYWNlLCB0aGV5IHNlZW0gdG8gc3RvcCBhdCB0aGUg ODAweDYwMCBtYXJrLiBIb3dldmVyIHlvdSB3aWxsCj4gPiBwcm9iYWJseSBmaW5kIExWRFMgUkdC IGRpc3BsYXlzIHdoZXJlIHRoZXJlIGFyZSBmb3VyIHNlcGVyYXRlIExWRFMKPiA+IHN0cmVhbXMg Zm9yIFJHQiBhbmQgc3luYyBpbmZvLiAgCj4gVGhpcyBpcyB3aGF0IEkgbmVlZCB0byBmaWd1cmUg b3V0Li4uIHdoYXQgc2lnbmFscyB0byBzZW5kIHRvIExWRFMuCj4gQXJlIHlvdSBzdWdnZXN0aW5n IGl0J3MgdGhlIHNhbWUgUkdCIGRhdGEvY2xvY2svc3luYyBzaWduYWxzLCBqdXN0IG9uCj4gYSBk aWZmZXJlbnQgcGh5c2ljYWwgbGF5ZXI/wqAgSWYgc28sIHRoYXQgc3RpbGwgcG9zZXMgdGhlIHNh bWUgaXNzdWUKPiBvZiBmaW5kaW5nIGEgY2hpcCB0aGF0IHdpbGwgY29udHJvbCBhIDJNUCBkaXNw bGF5LgoKWWVzIGl0IGRvZXMgYXBwZWFyIHRvIHdvcmsgdGhhdCB3YXkuIFRoZXJlIGFyZSBhIGxv dCBvZiByZXBsYWNlbWVudApsYXB0b3Agc2NyZWVucyBhdmFpbGFibGUgb24gZUJheSwgYW5kIGFs bCB0aGUgb25lcyBJIGhhdmUgc2VlbiB3aXRoCkxWRFMgYXJlIGRvaW5nIG11bHRpcGxlIHNlcmlh bCBzdHJlYW1zIChSR0IpIGFsb25nIHdpdGggYW5vdGhlciBMVkRTCnN0cmVhbSBmb3IgdGhlIHN5 bmMuCgpBbHNvIHRoZXJlIGFyZSBTRVJERVMgY2hpcHMgZnJvbSBUSSB0aGF0IHdvdWxkIHRha2Ug dGhlIG91dHB1dCBvZgpzb21ldGhpbmcgbGlrZSBhIFBJQzMyTVovREEgR1BVIGFuZCBzZW5kIGl0 IGFzIExWRFMgLSBidXQgeW91IHdvdWxkCm5lZWQgdG8gZGVjaWRlIGlmIHlvdSBjYW4gZ2V0IGhp Z2ggZW5vdWdoIHJlc29sdXRpb24gZm9yIHdoYXQgeW91IHdhbnQuClRoZXJlIGlzIGFsc28gYSBQ SUMyNCB3aXRoIGEgR1BVLCBidXQgaXQgZG9lc24ndCBoYXZlIHRoZSBpbnRlcm5hbAptZW1vcnks IG9uZSBhZHZhbnRhZ2Ugb2YgdGhlIFBJQzMyIGlzIGl0IGNhbiBjb21lIHdpdGggb25ib2FyZCBE RFMgUkFNCndoaWNoIGhhcyBlbm91Z2ggY2FwYWNpdHkgdG8gYWxsb3cgcGFnZSBzd2l0Y2hpbmcg b2YgdGhlIGRpc3BsYXksIGFuZApzbyBvbi4gVGhlIFBJQzI0IGNhbiB1c2UgZXh0ZXJuYWwgbWVt b3J5IG9uIHRoZSBFUE1QIHBvcnQsIGJ1dCBpdCBzZWVtcwp0byBiZSBhIGtsdWRnZSB0byBtZS4K Cj4gCj4gCj4gPiBJIGhhdmUgbG9va2VkIGludG8gdGhpcyBmb3IgdHJ5aW5nIHRvCj4gPiB1c2Ug YSBQSUMzMk1aL0RBIHNlcmllcyBjaGlwIHRoYXQgaGFzIGEgR1BMIGluIGl0LCBidXQgaXQgb25s eSBoYXMKPiA+IFJHQiBvdXRwdXQgYW5kIGlzIGxpbWl0ZWQgdG8gYXJvdW5kIHRoZSA4MDB4NjAw IG1hcmssIHdoaWNoIGFsc28KPiA+IGxpbWl0cyBzY3JlZW4gc2l6ZSB0byBhcm91bmQgNyBpbmNo ZXMuCj4gPgo+ID4gUXVpdGUgZnJhbmtseSwgZm9yIHdoYXQgeW91IGFyZSBsb29raW5nIHRvIGRv IEkgd291bGQgZ2V0IGEgc2NyZWVuCj4gPiB3aXRoIGFuIEhETUkgaW50ZXJmYWNlIGFuZCB1c2Ug YSBSUGkgWmVybyB0byBkcml2ZSBpdC4gVGhlbiBhbGwgeW91cgo+ID4gcHJvZ3JhbW1pbmcgaXMg YXBwbGljYXRpb24gcHJvZ3JhbW1pbmcgdW5kZXIgTGludXgsIGZvciB3aGljaCB5b3UKPiA+IGNv dWxkIHByb2JhYmx5IHVzZSBweXRob24gcmF0aGVyIHRoYW4gJ2JhcmUgbWV0YWwnIEMuICAKPiBX ZWxsIGZ1bm55IHlvdSBzYXkgdGhhdC4uLiBJIGhhZCBzdGFydGVkIGRvd24gdGhlIHBhdGggb2Yg ZG9pbmcgYmFyZSAKPiBtZXRhbCBQaS7CoCBGb3IgYSBzbWFsbCBlbWJlZGRlZCBkZXZpY2UsIGl0 IHdvdWxkIGJlIHRoZSBjb21wdXRlCj4gbW9kdWxlcyBhdCAkMjUtJDMwL2VhLsKgIE5vdCBhcyBs b3cgY29zdCBhcyBJIHdvdWxkJ3ZlIGxpa2VkLCBidXQgb2gKPiB3ZWxsLsKgIEluIHRoZSBtZWFu d2hpbGUgdGhvdWdoIHRoYXQncyBIRE1JLsKgIEhhdmVuJ3QgcmVzZWFyY2hlZCB3aGF0Cj4gaW50 ZXJmYWNlIEkgd291bGQgbmVlZCB0byBjb252ZXJ0IEhETUkgdG8gUkdCLCBidXQgdGhlbiB0aGF0 IHdpbGwKPiBhbHNvIGFkZCBjb3N0IGFuZCBzaXplLgo+IEkndmUgaGFkIHNvbWUgc3VjY2VzcyB3 aXRoIGJhcmUgbWV0YWwgb24gdGhlIFBpLCBidXQgdGhlbiBJIGRvbid0IAo+IGNvbnNpZGVyIG15 c2VsZiBhIGRldmVsb3BlciBub3dhZGF5cy4uLiBNeSBNLk8uIGlzIHRvIGdldCBpbnZvbHZlZCBh dCAKPiB0aGUgc3RhcnQgdW50aWwgSSBmaWd1cmUgb3V0IGVub3VnaCB0byBrbm93IGlmIGl0IHdp bGwgd29yaywKPiBhcmNoaXRlY3QgdGhlIHN5c3RlbSwgdGhlbiBnZXQgc29tZW9uZSB0byB3cml0 ZSB0aGUgY29kZSBwcm9wZXJseS4KPiBGaW5kaW5nIHNvbWVvbmUgdG8gZG8gYmFyZS1tZXRhbCBQ aSB3b24ndCBiZSBlYXN5LCBhbmQgZGVmIHByaWNleS4KPiBUaGVyZSdzIGdvdCB0byBhIHdheSB0 byBkbyB0aGlzIGluIGEgbGVzcyBjb252b2x1dGVkIHdheS4KCkhtbSwgZG9pbmcgYmFyZSBtZXRh bCBvbiB0aGUgUGkgd29uJ3QgYmUgZWFzeSwgSSBkb24ndCBrbm93IGhvdyBtdWNoCmluZm8gaXMg YXZhaWxhYmxlIGFib3V0IHRoZSBHUFUgY2hpcCB3aGljaCB5b3Ugd291bGQgbmVlZCB0byBkbyBi YXJlCm1ldGFsIHByb2dyYW1taW5nLiBJIHdhcyBmaWd1cmluZyBvbiBkb2luZyBpdCBhcyBhIExp bnV4IGFwcGxpY2F0aW9uLApidXQgaGF2ZW4ndCBjaGVja2VkIG91dCBob3cgZmFzdCB0aGUgYm9h cmRzIGJvb3QgdXAuCgpZb3UgbWF5IGVuZCB1cCB3aXRoIGEgbXVsdGktY2hpcCByZXN1bHQgaWYg bmVlZGluZyB0byBkbyBhYnNvbHV0ZQptaW5pbXVtIGJvb3QgdGltZXMgLSBidXQgZG9uJ3QgZm9y Z2V0IGEgc2NyZWVuIGlzbid0IGluc3RhbnQgb24gZWl0aGVyLAppdCB0YWtlcyB0aGVtIGEgZmV3 IHNlY29uZHMgdG8gaW5pdGlhbGlzZS4gVGhlIHRpbWUgdGFrZW4gZm9yIGEgbGFwdG9wCnRvIHJl c3RvcmUgdGhlIHNjcmVlbiBvbmNlIGl0IGhhcyBibGFua2VkIGl0IGFuZCB5b3UgaGl0IGEga2V5 IG9yCndyaWdnbGUgYSBtb3VzZSBpcyBub3QgaW5zdGFudGFuZW91cy4gaSB3b3VsZCBoYXZlIHRo b3VnaHQgaWYgeW91IGNhbgpnZXQgdG8gYSBwb2ludCB3aGVyZSBhIFBJQzMyIHBsdXMgUkdCIG1v bml0b3IgYXQgdGhlIG1heGltdW0gcmVzb2x1dGlvbgppdCB3b3VsZCBoYW5kbGUgdGFrZXMgYWJv dXQgdHdpY2UgdGhlIHRpbWUgaXQgdGFrZXMgYSBsYXB0b3AgdG8gdW5ibGFuawphIHNjcmVlbiBt aWdodCBiZSBhcyBnb29kIGFzIHlvdSBnZXQsIGV2ZW4gd2l0aCB0aGUgYmVzdCBiYXJlIG1ldGFs CnByb2dyYW1taW5nLgoKSSBoYXZlbid0IGR1ZyBpbnRvIGl0LCBidXQgbXkgdW5kZXJzdGFuZGlu ZyBvZiBIRE1JIGlzIGl0IGlzIGEgYml0IGxpa2UKVVNCIC0gdGhlcmUgaXMgYSBsb3Qgb2YgdW5k ZXJseWluZyBoYW5kc2hha2luZyBkZXNpZ25lZCBpbiB0byBkZWFsIHdpdGgKZGlnaXRhbCByaWdo dHMgbWFuYWdlbWVudCB0byBlbnN1cmUgdGhlIHN0cmVhbSBjYW4ndCBiZSB0YXBwZWQuIE5vdwp0 aGF0IHNpZGUgb2YgdGhpbmdzIGRvbid0IGNvbmNlcm4geW91ciBzaXR1YXRpb24gc28geW91IHdv dWxkbid0IG5lZWQKbW9zdCBvZiB0aGUgaGFuZHNoYWtpbmcsIGJ1dCBJIHdvdWxkbid0IGxvb2sg YXQgdHJ5aW5nIHRvIGdvIHRoYXQgd2F5CnVubGVzcyB0aGUgbW9uaXRvciB3YXMgZ29pbmcgdG8g YmUgZW50aXJlbHkgc2VwZXJhdGUgdG8gdGhlIGVsZWN0cm9uaWNzCnlvdSBhcmUgZ29pbmcgdG8g dXNlIHRvIGRyaXZlIGl0LCBzdWNoIGFzIHVzaW5nIGEgUGkgd2l0aCBhIGNvbXB1dGVyCm1vbml0 b3Igb3IgVFYgc2V0LgoKCi0tIApodHRwOi8vd3d3LnBpY2xpc3QuY29tL3RlY2hyZWYvcGljbGlz dCBQSUMvU1ggRkFRICYgbGlzdCBhcmNoaXZlClZpZXcvY2hhbmdlIHlvdXIgbWVtYmVyc2hpcCBv cHRpb25zIGF0Cmh0dHA6Ly9tYWlsbWFuLm1pdC5lZHUvbWFpbG1hbi9saXN0aW5mby9waWNsaXN0 Cg== .