{"draftJsState":{"blocks":[{"data":{},"depth":0,"entityRanges":[{"key":0,"length":34,"offset":13}],"inlineStyleRanges":[],"text":"О платформе: https://dzen.ru/a/ZNl3aWiUFm1X5II6","type":"unstyled","key":"vrnd"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"unstyled","key":"1i8sg"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"Опишу, как \"поднять\" SPI в Линуксе (Убунту) , подключить экранчик 12864 с контроллером ST7920 (бывают и другие варианты контроллеров) к ZYNQ-7010 и отобразить на нём текст, линию и прямоугольник , используя Питон.","type":"unstyled","key":"9gsei"},{"data":{"image":{"id":"66792a01b1c13b13bb3ae330"}},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"Тест, наклонная линия, пустой прямоугольник и прямоугольник с заливкой","type":"atomic:image","key":"6ngc9"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"Подключен к такой плате ","type":"unstyled","key":"d354a"},{"data":{"image":{"id":"66792b20eb7b71571ce21270"}},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"atomic:image","key":"7vai3"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"unstyled","key":"akv6u"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"1. Изучаем наработки по теме. ","type":"unstyled","key":"86b44"},{"data":{"embedData":{"type":"external","host":"pvsm.ru","src":"https://www.pvsm.ru/assembler/55601","title":"Программирование дисплея на контроллере ST7920"}},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"atomic:embed","key":"cobim"},{"data":{"embedData":{"type":"external","host":"github.com","image":{"src":"https://avatars.dzeninfra.ru/get-zen_brief_embed/271828/pub_6679104efb07197c08d3b0e7_6679144020832d3e4ccf540f/smart_crop_600x300","width":600,"height":300,"mainColor":"#F8F8F8"},"src":"https://github.com/JMW95/pyST7920","title":"GitHub - JMW95/pyST7920: Python library to control ST7920 128x64 monochrone LCD panel using Raspberry Pi and SPI"}},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"atomic:embed","key":"1i4pr"},{"data":{"embedData":{"type":"external","host":"microtechnics.ru","image":{"src":"https://avatars.dzeninfra.ru/get-zen_brief_embed/271828/pub_6679104efb07197c08d3b0e7_6679145b9d76681df9220c7a/smart_crop_156x156","width":156,"height":156,"mainColor":"#000000"},"src":"https://microtechnics.ru/raspberry-pi-obmen-dannymi-po-interfejsu-spi/","title":"Raspberry Pi. Обмен данными по интерфейсу SPI."}},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"atomic:embed","key":"dl04r"},{"data":{"embedData":{"type":"external","host":"hackster.io","image":{"src":"https://avatars.dzeninfra.ru/get-zen_brief_embed/271828/pub_6679104efb07197c08d3b0e7_667914a8181eb12ec896acae/smart_crop_600x300","width":600,"height":300,"mainColor":"#183040"},"src":"https://www.hackster.io/whitney-knitter/spidev-tutorial-for-zynq-7000-fpga-devices-b5e399","title":"SPIdev Tutorial for Zynq-7000 FPGA Devices"}},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"atomic:embed","key":"1b63v"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"unstyled","key":"3dooe"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"2. Блок дизайн Вивадо делаем, как на картинке ","type":"unstyled","key":"7jitr"},{"data":{"image":{"id":"66791ab4402aef57deef47b1"}},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"Подключим ВХОД SPI0_SS_I к константе (1)","type":"atomic:image","key":"dsnmh"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"unstyled","key":"7ocb8"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"unstyled","key":"ehuo1"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"unstyled","key":"8ji6s"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"3. Синтезируем и открываем синтез-дизайн , назначаем выводы нашего новоиспечённого на ножки (Package Pins) микросхемы xc7z010clg400 ","type":"unstyled","key":"e632c"},{"data":{"image":{"id":"667921229d76681df93f0ad6"}},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"MOSI=Tx3, MISO=Rx3, SCLK=Plug3, SS0=Speed1, SS1=Speed2 (на плате А9)","type":"atomic:image","key":"6o098"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"на плане отобразятся назначения пинов","type":"unstyled","key":"c1dj7"},{"data":{"image":{"id":"6679223deb7b71571ccac413"}},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"квадратики - это ножки микросхемы , (на которые \"накатывают шары\")","type":"atomic:image","key":"80kar"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"4. Далее всё, как обычно, Синтез, Имплементация, Генерация Битстрима, Экспорт \"Хардварэ инклуде битстрим\", запуск SDK (Vitis)","type":"unstyled","key":"fvvaq"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"5. Генерируем FSBL и BOOT.bin","type":"unstyled","key":"e54qt"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"6. Генерируем Device Tree и собираем devicetree.dtb","type":"unstyled","key":"dctar"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"7. Копируем эти два файла в загрузочный раздел. Загружаемся и ищем spi в /dev. (Вполне вероятно, что никаких SPI в системе не обнаружится, как разрулить такую ситуацию объясню позже.)","type":"unstyled","key":"6c3ml"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"8. Запускаем Питон и добавляем 2 файла - драйвер дисплейчика и собственно тест.","type":"unstyled","key":"202ja"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"драйвер st7920.py:","type":"unstyled","key":"84vc5"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"____________________________________________________________________________","type":"unstyled","key":"2vjjm"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"```","type":"unstyled","key":"49cqi"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"import spidev\nimport png\nfrom copy import deepcopy\n\nclass ST7920:\n\tdef __init__(self):\n\t\tself.spi = spidev.SpiDev()\n\t\tself.spi.open(0,1)\n\t\tself.spi.cshigh = True # use inverted CS\n\t\tself.spi.max_speed_hz = 1000000 # set SPI clock to 1.8MHz, up from 125kHz\n\t\t\n\t\tself.send(0,0,0x30) # basic instruction set\n\t\tself.send(0,0,0x30) # repeated\n\t\tself.send(0,0,0x0C) # display on\n\t\t\n\t\tself.send(0,0,0x34) #enable RE mode\n\t\tself.send(0,0,0x34)\n\t\tself.send(0,0,0x36) #enable graphics display\n\t\t\n\t\tself.set_rotation(0) # rotate to 0 degrees\n\t\t\n\t\tself.fontsheet = self.load_font_sheet(\"fontsheet.png\", 6, 8)\n\t\t\n\t\tself.clear()\n\t\tself.currentlydisplayedfbuff = None\n\t\tself.redraw()\n\t\n\tdef set_rotation(self, rot):\n\t\tif rot==0 or rot==2:\n\t\t\tself.width = 128\n\t\t\tself.height = 64\n\t\telif rot==1 or rot==3:\n\t\t\tself.width = 64\n\t\t\tself.height = 128\n\t\tself.rot = rot\n\t\n\tdef load_font_sheet(self, filename, cw, ch):\n\t\timg = png.Reader(filename).read()\n\t\trows = list(img[2])\n\t\theight = len(rows)\n\t\twidth = len(rows[0])\n\t\tsheet = []\n\t\tfor y in range(height//ch):\n\t\t\tfor x in range(width//cw):\n\t\t\t\tchar = []\n\t\t\t\tfor sy in range(ch):\n\t\t\t\t\trow = rows[(y*ch)+sy]\n\t\t\t\t\tchar.append(row[(x*cw):(x+1)*cw])\n\t\t\t\tsheet.append(char)\n\t\treturn (sheet, cw, ch)\n\t\n\tdef send(self, rs, rw, cmds):\n\t\tif type(cmds) is int: # if a single arg, convert to a list\n\t\t\tcmds = [cmds]\n\t\tb1 = 0b11111000 | ((rw&0x01)<<2) | ((rs&0x01)<<1)\n\t\tbytes = []\n\t\tfor cmd in cmds:\n\t\t\tbytes.append(cmd & 0xF0)\n\t\t\tbytes.append((cmd & 0x0F)<<4)\n\t\treturn self.spi.xfer2([b1] + bytes)\n\t\n\tdef clear(self):\n\t\tself.fbuff = [[0]*(128//8) for i in range(64)]\n\t\n\tdef line(self, x1, y1, x2, y2, set=True):\n\t\tdiffX = abs(x2-x1)\n\t\tdiffY = abs(y2-y1)\n\t\tshiftX = 1 if (x1 < x2) else -1\n\t\tshiftY = 1 if (y1 < y2) else -1\n\t\terr = diffX - diffY\n\t\tdrawn = False\n\t\twhile not drawn:\n\t\t\tself.plot(x1, y1, set)\n\t\t\tif x1 == x2 and y1 == y2:\n\t\t\t\tdrawn = True\n\t\t\t\tcontinue\n\t\t\terr2 = 2 * err\n\t\t\tif err2 > -diffY:\n\t\t\t\terr -= diffY\n\t\t\t\tx1 += shiftX\n\t\t\tif err2 < diffX:\n\t\t\t\terr += diffX\n\t\t\t\ty1 += shiftY\n\t\n\tdef fill_rect(self, x1, y1, x2, y2, set=True):\n\t\tfor y in range(y1,y2+1):\n\t\t\tself.line(x1,y,x2,y, set)\n\t\n\tdef rect(self, x1, y1, x2, y2, set=True):\n\t\tself.line(x1,y1,x2,y1,set)\n\t\tself.line(x2,y1,x2,y2,set)\n\t\tself.line(x2,y2,x1,y2,set)\n\t\tself.line(x1,y2,x1,y1,set)\n\t\n\tdef plot(self, x, y, set):\n\t\tif x<0 or x>=self.width or y<0 or y>=self.height:\n\t\t\treturn\n\t\tif set:\n\t\t\tif self.rot==0:\n\t\t\t\tself.fbuff[y][x//8] |= 1 << (7-(x%8))\n\t\t\telif self.rot==1:\n\t\t\t\tself.fbuff[x][15 - (y//8)] |= 1 << (y%8)\n\t\t\telif self.rot==2:\n\t\t\t\tself.fbuff[63 - y][15-(x//8)] |= 1 << (x%8)\n\t\t\telif self.rot==3:\n\t\t\t\tself.fbuff[63 - x][y//8] |= 1 << (7-(y%8))\n\t\telse:\n\t\t\tif self.rot==0:\n\t\t\t\tself.fbuff[y][x//8] &= ~(1 << (7-(x%8)))\n\t\t\telif self.rot==1:\n\t\t\t\tself.fbuff[x][15 - (y//8)] &= ~(1 << (y%8))\n\t\t\telif self.rot==2:\n\t\t\t\tself.fbuff[63 - y][15-(x//8)] &= ~(1 << (x%8))\n\t\t\telif self.rot==3:\n\t\t\t\tself.fbuff[63 - x][y//8] &= ~(1 << (7-(y%8)))\n\t\n\tdef put_text(self, s, x, y):\n\t\tfor c in s:\n\t\t\ttry:\n\t\t\t\tfont, cw, ch = self.fontsheet\n\t\t\t\tchar = font[ord(c)]\n\t\t\t\tsy = 0\n\t\t\t\tfor row in char:\n\t\t\t\t\tsx = 0\n\t\t\t\t\tfor px in row:\n\t\t\t\t\t\tself.plot(x+sx, y+sy, px == 1)\n\t\t\t\t\t\tsx += 1\n\t\t\t\t\tsy += 1\n\t\t\texcept KeyError:\n\t\t\t\tpass\n\t\t\tx += cw\n\n\tdef _send_line(self, row, dx1, dx2):\n\t\tself.send(0,0,[0x80 + row%32, 0x80 + ((dx1//16) + (8 if row>=32 else 0))]) # set address\n\t\tself.send(1,0,self.fbuff[row][dx1//8:(dx2//8)+1])\n\n\tdef redraw(self, dx1=0, dy1=0, dx2=127, dy2=63, full=False):\n\t\tif self.currentlydisplayedfbuff == None: # first redraw always affects the complete LCD\n\t\t\tfor row in range(0, 64):\n\t\t\t\tself._send_line(row, 0, 127)\n\t\t\tself.currentlydisplayedfbuff = deepcopy(self.fbuff) # currentlydisplayedfbuff is initialized here\n\t\telse: # redraw has been called before, since currentlydisplayedfbuff is already initialized\n\t\t\tfor row in range(dy1, dy2+1):\n\t\t\t\tif full or (self.currentlydisplayedfbuff[row] != self.fbuff[row]): # redraw row if full=True or changes are detected\n\t\t\t\t\tself._send_line(row, dx1, dx2)\n\t\t\t\t\tself.currentlydisplayedfbuff[row][dx1//8:(dx2//8)+1] = self.fbuff[row][dx1//8:(dx2//8)+1]\n__________________________________________________________________________________________\n```","type":"unstyled","key":"e7f9d"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"тест дисплея 12864.py :","type":"unstyled","key":"1n0p3"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"+++++++++++++++++++++++++++++++++++++++++++","type":"unstyled","key":"f8a9s"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"from st7920 import ST7920\nfrom time import sleep\ns = ST7920()\n\ns.clear()\nsleep(0.5)\ns.put_text(\"Privet, Bambuk!\", 5, 50)\nsleep(0.5)\ns.redraw()\nsleep(1)\ns.clear()\ns.fill_rect(1,30,120,40)\ns.rect(1,1,120,60)\ns.line(1,1,120,60)\ns.put_text(\"SPI on Spidev0.1!\", 20, 5)\ns.redraw()\nsleep(2)\ns.clear()\nsleep(0.5)\ns.put_text(\"Privet, Bambuk!\", 5, 50)\nsleep(0.5)\ns.redraw()\nsleep(1)\n#s.clear()\ns.fill_rect(1,30,120,40)\ns.rect(1,1,120,60)\ns.line(1,1,120,60)\ns.put_text(\"SPI on Spidev0.1!\", 20, 5)\ns.redraw()\n++++++++++++++++++++++++++++++++++++++++++++","type":"unstyled","key":"2638b"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"Вполне вероятно, что никаких SPI в системе не обнаружится, объясню, как разрулить такую ситуацию.","type":"unstyled","key":"c5ej2"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"Можно создать прекрасный дизайн в Вивадо, можно правильно припаять SPI устройство к плате, но оно не заработает, пока не будет прописано в девайстри.","type":"unstyled","key":"8qin5"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"В нашем случае необходимо найти в devicetree.dts конструкцию","type":"unstyled","key":"6bhpc"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"spi@e0006000 {\n\t\t\tcompatible = \"xlnx,zynq-spi-r1p6\";\n\t\t\treg = <0xe0006000 0x1000>;\n\t\t\tstatus = \"disabled\";\n\t\t\tinterrupt-parent = <0x04>;\n\t\t\tinterrupts = <0x00 0x1a 0x04>;\n\t\t\tclocks = <0x01 0x19 0x01 0x22>;\n\t\t\tclock-names = \"ref_clk\\0pclk\";\n\t\t\t#address-cells = <0x01>;\n\t\t\t#size-cells = <0x00>;\n\t\t};\nи привести её к виду:","type":"unstyled","key":"bvqbm"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"spi@e0006000 {\n\t\t\tcompatible = \"xlnx,zynq-spi-r1p6\";\n\t\t\treg = <0xe0006000 0x1000>;\n\t\t\tstatus = \"okay\";\n\t\t\tinterrupt-parent = <0x04>;\n\t\t\tinterrupts = <0x00 0x1a 0x04>;\n\t\t\tclocks = <0x01 0x19 0x01 0x22>;\n\t\t\tclock-names = \"ref_clk\\0pclk\";\n\t\t\t#address-cells = <0x01>;\n\t\t\t#size-cells = <0x00>;\n\t\t\tis-decoded-cs = <0x00>;\n\t\t\tnum-cs = <0x01>;\n\n\t\t\tspidev@0x00 {\n\t\t\t\tcompatible = \"spidev\";\n\t\t\t\tspi-max-frequency = <0xf4240>;\n\t\t\t\treg = <0x00>;\n\t\t\t};\n\t\t};","type":"unstyled","key":"cr8dm"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"Это позволит подключать по шине SPI произвольные устройства, на которые нет драйверов в ядре.","type":"unstyled","key":"372ne"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"Есть ещё один нюанс. В ядре линукса (файл uImage) нужно включить поддержку spidev.","type":"unstyled","key":"btgga"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[],"text":"","type":"marker","key":"QPL2bivXVf0IiFbNTJZ1"}],"entityMap":{"0":{"data":{"url":"https://dzen.ru/a/ZNl3aWiUFm1X5II6"},"mutability":"MUTABLE","type":"LINK"}}},"mentions":[]}