{"id":1509,"date":"2015-07-12T05:07:30","date_gmt":"2015-07-12T04:07:30","guid":{"rendered":"http:\/\/rglinuxtech.com\/?p=1509"},"modified":"2015-07-12T05:08:21","modified_gmt":"2015-07-12T04:08:21","slug":"arm64-hikey-with-proper-uart-connection","status":"publish","type":"post","link":"https:\/\/rglinuxtech.com\/?p=1509","title":{"rendered":"ARM64 – HiKey With Proper UART Connection.."},"content":{"rendered":"

One of the most annoying missing features of the HiKey ARM54 board is the lack of a proper UART connection, to enable the same degree of boot information as other SoC systems..\u00a0\u00a0\u00a0\u00a0 There is a 4-pin\/hole connection point, but no actual connector…\u00a0\u00a0\u00a0 So, I had to get out the (mini) soldering iron, and magnifying goggles, and use a not-so-steady hand..<\/p>\n

I managed to solder on three pin-type connectors, cut from a strip of a dozen or so, and then use female push-on connectors to the 1.8v USB\/UART tail..<\/p>\n

\"HiKey<\/a>

HiKey UART Connection<\/strong><\/span><\/p><\/div>\n

After this, I got a proper<\/span> boot \/ console display (on \/dev\/ttyAMA0<\/span><\/strong>):<\/p>\n

........<\/span><\/strong>\r\ndebug EMMC boot: print init OK<\/span><\/strong>\r\ndebug EMMC boot: send RST_N .<\/span><\/strong>\r\ndebug EMMC boot: start eMMC boot......<\/span><\/strong>\r\nload fastboot1!<\/span><\/strong>\r\n#PMU LDO15_REG_ADJ:0x00000054, STATUS3_LDO9_16:0x00000048<\/span><\/strong>\r\n#PMU LDO22_REG:ADJ:0x00000057, STATUS4_LDO17_22:0x00000026<\/span><\/strong>\r\n[BDID]boardid: 777 <7.7.7><\/span><\/strong>\r\n#select_hw_config, 58, board_id:0x0000002b<\/span><\/strong>\r\n#select_hw_config, 71, array index:0<\/span><\/strong>\r\nbaudRate=115200, g_baudRate=115200<\/span><\/strong>\r\nget_hw_config_int,hw_afreq:1200000.<\/span><\/strong>\r\nget_efuse_value,efuse ATE_flag temp:0x02800000.<\/span><\/strong>\r\nATE PASS,ate flag value:0x00000001.<\/span><\/strong>\r\nget_efuse_value,efuse acpu_freq change level:0xb6baeb00.<\/span><\/strong>\r\nget_efuse_value,efuse afreq change level val:0x00000000.<\/span><\/strong>\r\nget_efuse_value,efuse acpu_freq level:0xb6baeb00.<\/span><\/strong>\r\nget_efuse_value,efuse acpu freq sys level:0x00000000.<\/span><\/strong>\r\n###INFO###,soc_freq = hw_afreq, efuse_afreq:1200000,hw_afreq:1200000.<\/span><\/strong>\r\nefuse ACPU 1.4G HPM:0.<\/span><\/strong>\r\nefuse ACPU 1.2G HPM:0.<\/span><\/strong>\r\nefuse ACPU 960M HPM:0.<\/span><\/strong>\r\nfastboot: acpu_dvfs_init successful!<\/span><\/strong>\r\nacpu_get_dvfs_volt,g_afreq_max_pro is :5\u2592\u2592acpu max freq:1200000.<\/span><\/strong>\r\nacpu support freq num:5<\/span><\/strong>\r\nvolt:0x0000003a 0x0000003a 0x0000004a 0x0000005b 0x0000006b<\/span><\/strong>\r\nacpu start prof:0x00000004<\/span><\/strong>\r\nacpu magic:0x5a5ac5c5<\/span><\/strong>\r\n#### success !!!!! set_acpu_freq: acpu support freq num is 5 and start is 4 .<\/span><\/strong>\r\nget_ddr_type 1; (lpddr2: 0; lpddr3: 1)<\/span><\/strong>\r\nddr_init(): get_ddr_type: 1<\/span><\/strong>\r\n ddr freq: 800000<\/span><\/strong>\r\nin lpddr3_init: mode: 0; freq_config: 800<\/span><\/strong>\r\n...... etc.......<\/span><\/strong><\/pre>\n
This is (IMHO) essential for proper development and testing, especially as this device (unlike the DragonBoard 410c) has a version of U-Boot available, and also supports UEFI..\u00a0 https:\/\/github.com\/96boards\/documentation\/wiki\/HiKeyUEFI<\/a><\/p>\n
So far, I have not been able to get a newer compiled Kernel to boot, but this UART console connection will help to get things working….<\/p>\n
Robert Gadsdon.\u00a0 July 11, 2015.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"
One of the most annoying missing features of the HiKey ARM54 board is the lack of a proper UART connection, to enable the same degree of boot information as other SoC systems..\u00a0\u00a0\u00a0\u00a0 There is a 4-pin\/hole connection point, but no actual connector…\u00a0\u00a0\u00a0 So, I had to get out the (mini) soldering iron, and magnifying goggles, and use …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1131,6,1146,16],"tags":[1133,1152,1147,1151,1175,1150],"class_list":["post-1509","post","type-post","status-publish","format-standard","hentry","category-arm64","category-crash-and-burn","category-hikey","category-linux-arm","tag-arm64","tag-boot-debug-console","tag-hikey","tag-soldered","tag-success","tag-uart-connection"],"_links":{"self":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts\/1509","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1509"}],"version-history":[{"count":2,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts\/1509\/revisions"}],"predecessor-version":[{"id":1512,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts\/1509\/revisions\/1512"}],"wp:attachment":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1509"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1509"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1509"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}