From patchwork Sat Sep 5 10:46:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heinrich Schuchardt X-Patchwork-Id: 1357981 X-Patchwork-Delegate: uboot@andestech.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=85.214.62.61; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=gmx.de Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; secure) header.d=gmx.net header.i=@gmx.net header.a=rsa-sha256 header.s=badeba3b8450 header.b=HCZXS2Vc; dkim-atps=neutral Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4BkB7S5k0wz9sSP for ; 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Sat, 5 Sep 2020 12:46:53 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=gmx.de Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=xypron.glpk@gmx.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1599302812; bh=5jMbWIDdfvJz3HfLtKKSl7lB2jFTNM5lvhVURkIqQII=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date; b=HCZXS2VcMekCDVRfU43bMSSK6ok/L2aM6Pg9GzEF8ABJsIq+z6NvTYBwWaZgt/+Lh 4hj+9IliUWfiO1Zuhd2Urv9Yr1A2Rn4byP4UEmhevXcS7KTLAoq3frB6RID2yklbun aGOBj0nwMqJqfVjSOW2Ee871JK7vqUIfHzuu5xco= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from workstation4.fritz.box ([178.202.41.107]) by mail.gmx.com (mrgmx005 [212.227.17.184]) with ESMTPSA (Nemesis) id 1N1OXZ-1kgJRn1Zcp-012lzG; Sat, 05 Sep 2020 12:46:52 +0200 From: Heinrich Schuchardt To: Sean Anderson Cc: u-boot@lists.denx.de, Heinrich Schuchardt Subject: [PATCH] doc/sipeed/maix: describe RESET and BOOT button Date: Sat, 5 Sep 2020 12:46:46 +0200 Message-Id: <20200905104646.17766-1-xypron.glpk@gmx.de> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-Provags-ID: V03:K1:ZhbvCunkbqg8+QbdZyN3qCsZ/XiVhjaeGnteGyLaNUhuKqOcK2c l1qGIv38kEp11Z5OfZK+ZlCsoaPBZUu+EJVIwfeb7qYBf0Q1U9gnYV/IY8G+eObL7mI2/nM k/WCbviUidKYV0OPdlJk80HreDW/ybuaTLUl+1nK458Sc8Fr23qmP5WImvLSHMSmsGBsRCy XpRZMTJxEdEwyyyOScMKA== X-UI-Out-Filterresults: notjunk:1;V03:K0:cgnUXcSfYpQ=:W7dt4R8h7/HEqOYDvzB4AE /cT0DEFYQb+lIdgLTbWA3KhiSV6AJj1XiirpgJT39T22cSX/j0sfvZ4q3nQVlEeZVELXfMfhM grWfjGUlaSlK9dwX0/s1C1XBA6rTG212C9Bgus+Abm+tJiOwDhHzl8Hipifya8PXD7n114K93 yV1dUW3yR+UHOQm3LF473fXvEBAJYZvPPJ28LmhP1l6fT6UnlycUQHLs99oMwR4oYjmaiLY2C fXAiclgL5e5qRanep71n4lNoq63IVz2ibj+jyf6s+kDw0vKu4aa5lq0zmwpJoPIvlkTbYyZmQ 1ss5aiT4smLmHarbCb8xsJ4iZ3GKeqCh1S3b6Tjoo6O5PLT9JBr+PTwmZnSdijuaqW8ZmMk3y GOkKo84aYis/z5Zbh5/qSVZZhHl/ymfZ7/Vr9qF1D76JbYwzQMgXaqf+nIExaNfhen2P3R0wt NfU3oDtiQx3U4P+ipu/3xfh2k3k1qiPszabloR9xyCuLLeJKMMCNFI0EdCkOe37ckz5YGnYwx w9165I0WCtGqI+303NGnyGsxiTEGn9IUDr4k3LTTvLpyY3jxUkDEDAMfIqdAWqK2JvQHoH5ll dm8Kkkxf/S4Ee6p/97Yk7ZwI6fiVagh9H7auei57/2TZVMYbExpkYWSFb4Tm9SpL92/36ug6H l/SqoNlLgFz+rnFF+D7dc1uRq+JaHo5FmeBqzV79lGmsJg0BIXsvFyBva6YTOdAxD8CWx+C3K IQkeIevZpCOg/rlYMmymM4v2KiE6Qg3sS3vZVLXXSCt3T+RoGjda+/FKouXueoNPqu5Cz51Vt IMVslq1zaDwI4+EIh8ellrlA/p5FHJHCdMALTCiWSaD8o37Fnw3RvBk9TFB4QkW5BvYHY6htB dqFIAbwF8MHKZG4BhQV/iAl/chISfO2NS28MVorGS7S6M2c0lgr2TZ7GEvQA+udv2RVAh8Eii b4xL+Ha0rvrOtKNxznZTrq7lmcL43GPU56ByMphl1D+/S4A+/sD4DEPfsFN5eGdo+sBk+EoT0 osijQsKwvkpyLXKsYSVn2H1kLlBKn5YU7UlK7lytNoTZvIX5kRyCOYV8UflRI38A4R4rNkX5k zIWl7bkyxcxYclG3x9mYXpwtD9MicWqAFQkIVmBtCPIYKudWifszHntvP93zKsub7G+tvl77c d+wG3Y5SFD7BNAMPzLyj6M6GuVf4UcshnGonrrj7eF4hwlbVtKRoikOQ9pjMdzsm1X+514c/V Nv7a8yExwu69yZg/4e1FOjNoHarv/1+7WiIiklg== X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.34 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.102.3 at phobos.denx.de X-Virus-Status: Clean In the boot flow description add the RESET and BOOT button as well as the function of the DTR and RTS lines of the serial interface. Signed-off-by: Heinrich Schuchardt --- doc/board/sipeed/maix.rst | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) -- 2.28.0 diff --git a/doc/board/sipeed/maix.rst b/doc/board/sipeed/maix.rst index 90ef70b7cf..a8efc90440 100644 --- a/doc/board/sipeed/maix.rst +++ b/doc/board/sipeed/maix.rst @@ -345,11 +345,15 @@ Technical Details Boot Sequence ^^^^^^^^^^^^^ -1. ``RESET`` pin is deasserted. +1. ``RESET`` pin is deasserted. The pin is connected to the ``RESET`` button. It + can also be set to low via either the ``DTR`` or the ``RTS`` line of the + serial interface (depending on the board). 2. Both harts begin executing at ``0x00001000``. 3. Both harts jump to firmware at ``0x88000000``. 4. One hart is chosen as a boot hart. -5. Firmware reads value of pin ``IO_16`` (ISP). +5. Firmware reads the value of pin ``IO_16`` (ISP). This pin is connected to the + ``BOOT`` button. The pin can equally be set to low via either the ``DTR`` or + ``RTS`` line of the serial interface (depending on the board). * If the pin is low, enter ISP mode. This mode allows loading data to ram, writing it to flash, and booting from specific addresses.