{"id":4347,"date":"2023-11-22T16:45:23","date_gmt":"2023-11-22T08:45:23","guid":{"rendered":"http:\/\/www.wangkaixuan.tech\/?p=4347"},"modified":"2023-11-24T14:26:59","modified_gmt":"2023-11-24T06:26:59","slug":"%e5%85%a5%e5%9d%91%e6%a0%91%e8%8e%93%e6%b4%be-07-bcm2835%e5%87%bd%e6%95%b0%e5%ba%93%e5%ae%9e%e7%8e%b0%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"http:\/\/www.wangkaixuan.tech\/?p=4347","title":{"rendered":"\u5165\u5751\u6811\u8393\u6d3e-07-BCM2835\u9a71\u52a8\u7814\u7a76"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">1.\u524d\u8a00<\/h1>\n\n\n\n<p>\u524d\u9762\u7684\u6587\u7ae0\u4e2d\u6211\u4eec\u63d0\u5230\uff0c\u6811\u8393\u6d3e4\u642d\u8f7d\u7684SOC\u662f\u535a\u901aBCM2711\uff0c\u914d\u5957\u7684\u51fd\u6570\u5e93\u662fbcm2835-1.73.tar.gz\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"974\" height=\"713\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-57.png\" alt=\"\" class=\"wp-image-4350\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-57.png 974w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-57-300x220.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-57-768x562.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-57-369x270.png 369w\" sizes=\"auto, (max-width: 974px) 100vw, 974px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"496\" height=\"46\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-55.png\" alt=\"\" class=\"wp-image-4348\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-55.png 496w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-55-300x28.png 300w\" sizes=\"auto, (max-width: 496px) 100vw, 496px\" \/><\/figure>\n\n\n\n<p>\u8fd9\u4e2a\u51fd\u6570\u5e93\u5b9e\u8d28\u4e0a\u53ea\u6709\u4e24\u4e2a\u5c0f\u6587\u4ef6\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"164\" height=\"46\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-56.png\" alt=\"\" class=\"wp-image-4349\"\/><\/figure>\n\n\n\n<p>\u6211\u4eec\u5c1d\u8bd5\u628a\u4ed6\u96c6\u6210\u5230\u4e4b\u524d\u5199\u7684\u63a7\u5236\u5355\u8272LED\u706f\u5c0f\u7a0b\u5e8f\u4e2d\uff0c\u5e76\u5220\u6389\u4e00\u5207\u5f71\u54cd\u6211\u4eec\u7406\u89e3\u539f\u7406\u7684\u4ee3\u7801\uff0c\u5f97\u5230\u4e86\u5982\u4e0b\u7684\u6781\u7b80\u5c0f\u7a0b\u5e8f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;sys\/types.h&gt;\n#include &lt;sys\/mman.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;stdio.h&gt;\n#include &lt;stdint.h&gt;\n#include &lt;errno.h&gt;\n#include &lt;fcntl.h&gt;\n#include &lt;string.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;time.h&gt;\n\n#define BCM2835_GPFSEL0             0x0000\n#define BCM2835_GPSET0              0x001c\n#define BCM2835_GPCLR0              0x0028\n\n#define BCM2835_GPIO_FSEL_OUTP      0x01\n#define BCM2835_GPIO_FSEL_MASK      0x07\n\nvolatile uint32_t *bcm2835_gpio = NULL;\n\nuint32_t bcm2835_peri_read(volatile uint32_t* paddr)\n{\n    uint32_t ret;\n    __sync_synchronize();\n    ret = *paddr;\n    __sync_synchronize();\n    return ret;\n}\n\nvoid bcm2835_peri_write(volatile uint32_t* paddr, uint32_t value)\n{\n      __sync_synchronize();\n      *paddr = value;\n      __sync_synchronize();\n}\n\nvoid bcm2835_peri_set_bits(volatile uint32_t* paddr, uint32_t value, uint32_t mask)\n{\n    uint32_t v = bcm2835_peri_read(paddr);\n    v = (v &amp; ~mask) | (value &amp; mask);\n    bcm2835_peri_write(paddr, v);\n}\n\nvoid bcm2835_gpio_fsel(uint8_t pin, uint8_t mode)\n{\n    volatile uint32_t* paddr = bcm2835_gpio + BCM2835_GPFSEL0\/4 + (pin\/10);\n    uint8_t   shift = (pin % 10) * 3;\n    uint32_t  mask = BCM2835_GPIO_FSEL_MASK &lt;&lt; shift;\n    uint32_t  value = mode &lt;&lt; shift;\n    bcm2835_peri_set_bits(paddr, value, mask);\n}\n\nvoid bcm2835_gpio_set(uint8_t pin)\n{\n    volatile uint32_t* paddr = bcm2835_gpio + BCM2835_GPSET0\/4 + pin\/32;\n    uint8_t shift = pin % 32;\n    bcm2835_peri_write(paddr, 1 &lt;&lt; shift);\n}\n\nvoid bcm2835_gpio_clr(uint8_t pin)\n{\n    volatile uint32_t* paddr = bcm2835_gpio + BCM2835_GPCLR0\/4 + pin\/32;\n    uint8_t shift = pin % 32;\n    bcm2835_peri_write(paddr, 1 &lt;&lt; shift);\n}\n\nint bcm2835_init(void)\n{\n    FILE *fp = fopen(\"\/proc\/device-tree\/soc\/ranges\", \"rb\");\n    if (NULL == fp)\n        return -1;\n\n    unsigned char buf&#91;16];\n    if (fread(buf, 1, 16, fp) != 16)\n    {\n        fclose(fp);\n        return -1;\n    }\n    fclose(fp);\n\n    uint32_t peri_off = (buf&#91;8]  &lt;&lt; 24) | (buf&#91;9]  &lt;&lt; 16) | (buf&#91;10] &lt;&lt; 8) | (buf&#91;11] &lt;&lt; 0);\n    uint32_t peri_siz = (buf&#91;12] &lt;&lt; 24) | (buf&#91;13] &lt;&lt; 16) | (buf&#91;14] &lt;&lt; 8) | (buf&#91;15] &lt;&lt; 0);\n\n    int memfd = open(\"\/dev\/mem\", O_RDWR | O_SYNC);\n    if (memfd &lt; 0)\n        return -1;\n\n    uint32_t* peri_addr = mmap(NULL, peri_siz, (PROT_READ | PROT_WRITE), MAP_SHARED, memfd, peri_off);\n    if (peri_addr == MAP_FAILED)\n    {\n        close(memfd);\n        return -1;\n    }\n\n    bcm2835_gpio = peri_addr + 0x200000 \/ 4;\n\n    close(memfd);\n\n    return 0;\n}\n\n\/\/ gcc -o blink blink.c\n\n#define PIN_R 17  \/\/ \u7ea2\u8272LED\u706fGPIO\u7aef\u53e3\n#define PIN_Y 27  \/\/ \u9ec4\n#define PIN_G 22  \/\/ \u7eff\n#define PIN_B 5   \/\/ \u84dd\n\nint main(int argc, char **argv)\n{\n    if (bcm2835_init() &lt; 0)\n      return 1;\n\n    bcm2835_gpio_fsel(PIN_R, BCM2835_GPIO_FSEL_OUTP);\n    bcm2835_gpio_fsel(PIN_Y, BCM2835_GPIO_FSEL_OUTP);\n    bcm2835_gpio_fsel(PIN_G, BCM2835_GPIO_FSEL_OUTP);\n    bcm2835_gpio_fsel(PIN_B, BCM2835_GPIO_FSEL_OUTP);\n    while (1)\n    {\n        bcm2835_gpio_set(PIN_R);\n        usleep(50000);\n        bcm2835_gpio_clr(PIN_R);\n        bcm2835_gpio_set(PIN_Y);\n        usleep(50000);\n        bcm2835_gpio_clr(PIN_Y);\n        bcm2835_gpio_set(PIN_G);\n        usleep(50000);\n        bcm2835_gpio_clr(PIN_G);\n        bcm2835_gpio_set(PIN_B);\n        usleep(50000);\n        bcm2835_gpio_clr(PIN_B);\n    }\n    return 0;\n}\n<\/code><\/pre>\n\n\n\n<p>\u4e0b\u9762\u6211\u4eec\u6df1\u5165\u5206\u6790\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">2.\u521d\u59cb\u5316<\/h1>\n\n\n\n<p>\u521d\u59cb\u5316\u51fd\u6570\u662fbcm2835_init\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u51fd\u6570\u7684\u7b2c\u4e00\u6b65\u662f\u4ecelinux\u7684proc\u6587\u4ef6\u7cfb\u7edf\u4e2d\u6253\u5f00\u4e86\u4e00\u4e2a\u6587\u4ef6\uff08\/proc\/device-tree\/soc\/ranges\uff09\uff0c\u7136\u540e\u4ece\u4e2d\u8bfb\u53d6\u4e8616\u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"725\" height=\"285\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-58.png\" alt=\"\" class=\"wp-image-4351\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-58.png 725w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-58-300x118.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-58-604x237.png 604w\" sizes=\"auto, (max-width: 725px) 100vw, 725px\" \/><\/figure>\n\n\n\n<p>\u8fd916\u4e2a\u5b57\u8282\u7684\u5185\u5bb9\u662f\u6709\u7ed3\u6784\u7684\uff0c\u5176\u4e2d9~12\u5b57\u8282\u5b58\u653e\u7684\u662f\u6811\u8393\u6d3e\u5916\u8bbe\u7684\u5730\u5740\u504f\u79fb\u91cf\uff0c13~16\u5b57\u8282\u5b58\u653e\u7684\u662f\u6811\u8393\u6d3e\u5916\u8bbe\u7684\u5185\u5b58\u5927\u5c0f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"896\" height=\"66\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-59.png\" alt=\"\" class=\"wp-image-4352\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-59.png 896w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-59-300x22.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-59-768x57.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-59-604x44.png 604w\" sizes=\"auto, (max-width: 896px) 100vw, 896px\" \/><\/figure>\n\n\n\n<p>\u62ff\u5230\u8fd9\u4e24\u4e2a\u4fe1\u606f\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u8c03\u7528mmap\uff0c\u5c06\u5916\u8bbe\u7684\u5185\u5b58\u6620\u5c04\u5230\u8fdb\u7a0b\u7684\u5730\u5740\u7a7a\u95f4\u4e86\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"964\" height=\"250\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-60.png\" alt=\"\" class=\"wp-image-4353\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-60.png 964w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-60-300x78.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-60-768x199.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-60-604x157.png 604w\" sizes=\"auto, (max-width: 964px) 100vw, 964px\" \/><\/figure>\n\n\n\n<p>GPIO\u662f\u5916\u8bbe\u7684\u4e00\u79cd\uff0c\u56e0\u6b64\u8fd8\u8981\u518d\u5c06\u5916\u8bbe\u7684\u5730\u5740\u8f6c\u6362\u4e3aGPIO\u7684\u5730\u5740\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"417\" height=\"41\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-61.png\" alt=\"\" class=\"wp-image-4354\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-61.png 417w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-61-300x29.png 300w\" sizes=\"auto, (max-width: 417px) 100vw, 417px\" \/><\/figure>\n\n\n\n<p>\u540e\u9762\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u5411\u8fd9\u5757\u5185\u5b58\u8bfb\u5199\u6570\u636e\u6765\u5b9e\u73b0\u8ddfGPIO\u5f15\u811a\u901a\u4fe1\u4e86\uff08\u4eceGPIO\u5185\u5b58\u5230GPIO\u5f15\u811a\u7684\u4fe1\u53f7\u8f6c\u6362\uff0c\u662flinux\u9a71\u52a8\u5c42\u5b8c\u6210\u7684\uff09\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">3.\u8bbe\u7f6e\u5f15\u811a<\/h1>\n\n\n\n<p>\u6211\u4eec\u8c03\u7528\u7684\u662fbcm2835_gpio_fsel\u51fd\u6570\uff0c\u5176\u4e2dfsel=function select\uff0c\u5373\u529f\u80fd\u9009\u62e9\uff0c\u5373\u9009\u62e9\u5f15\u811a\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n<p>\u53ef\u9009\u7684\u529f\u80fd\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"858\" height=\"344\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-62.png\" alt=\"\" class=\"wp-image-4355\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-62.png 858w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-62-300x120.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-62-768x308.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-62-604x242.png 604w\" sizes=\"auto, (max-width: 858px) 100vw, 858px\" \/><\/figure>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u867d\u7136\u6709\u5f88\u591a\uff0c\u4f46\u4e3b\u8981\u662f\u9884\u7559\u7684\uff0c\u771f\u6b63\u6709\u7528\u7684\u4e5f\u5c31\u662f\u8f93\u5165\/\u8f93\u51fa\u6a21\u5f0f\uff0c\u5373\u8bbe\u7f6e\u8981\u4eceGPIO\u5f15\u811a\u4e0a\u8bfb\u53d6\u7535\u5e73\u8fd8\u662f\u8f93\u51fa\u7535\u5e73\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u8981\u70b9\u4eaeLED\u706f\uff0c\u56e0\u6b64\u662f\u8981\u8f93\u51fa\u7535\u5e73\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"613\" height=\"274\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-63.png\" alt=\"\" class=\"wp-image-4356\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-63.png 613w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-63-300x134.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-63-604x270.png 604w\" sizes=\"auto, (max-width: 613px) 100vw, 613px\" \/><\/figure>\n\n\n\n<p>\u6211\u4eec\u770b\u8fd9\u4e2a\u51fd\u6570\u505a\u4e86\u5565\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"818\" height=\"548\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-64.png\" alt=\"\" class=\"wp-image-4357\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-64.png 818w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-64-300x201.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-64-768x515.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-64-403x270.png 403w\" sizes=\"auto, (max-width: 818px) 100vw, 818px\" \/><\/figure>\n\n\n\n<p>\u5927\u6982\u5c31\u662f\u5f80\u524d\u9762\u6620\u5c04\u7684\u5730\u5740\u4e0a\u7684\u67d0\u4e2a\u4f4d\u7f6e\u5199\u4e86\u4e9b\u4e1c\u897f\uff0c\u5177\u4f53\u5199\u4e86\u5565\u4e0d\u7528\u5173\u5fc3\uff0c\u56e0\u4e3a\u8fd9\u8ddfGPIO\u7684\u9a71\u52a8\u8bbe\u8ba1\u6709\u5173\uff0c\u6211\u4eec\u7406\u89e3\u5230\u5199\u4e86\u4e2a\u6570\u636e\u8fd9\u4e00\u5c42\u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">4.\u63a7\u5236LED\u706f<\/h1>\n\n\n\n<p>\u63a7\u5236LED\u706f\uff0c\u5176\u5b9e\u5c31\u662f\u63a7\u5236LED\u706f\u6240\u5728\u7684\u67d0\u4e2a\u5f15\u811a\u7684\u7535\u5e73\u9ad8\u4f4e\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"398\" height=\"361\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-66.png\" alt=\"\" class=\"wp-image-4359\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-66.png 398w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-66-300x272.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-66-298x270.png 298w\" sizes=\"auto, (max-width: 398px) 100vw, 398px\" \/><\/figure>\n\n\n\n<p>\u6700\u7ec8\u8fd8\u662f\u64cd\u4f5c\u5185\u5b58\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"719\" height=\"342\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-65.png\" alt=\"\" class=\"wp-image-4358\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-65.png 719w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-65-300x143.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-65-568x270.png 568w\" sizes=\"auto, (max-width: 719px) 100vw, 719px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">5.\u539f\u7406<\/h1>\n\n\n\n<p>\u4e0a\u8ff0\u8fc7\u7a0b\u7684\u539f\u7406\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"571\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-73-1024x571.png\" alt=\"\" class=\"wp-image-4380\" srcset=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-73-1024x571.png 1024w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-73-300x167.png 300w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-73-768x428.png 768w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-73-484x270.png 484w, http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2023\/11\/image-73.png 1218w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>GPIO\u662flinux\u5916\u8bbe\u7684\u4e00\u79cd\uff0c\u6709\u4e13\u95e8\u7684linux\u5916\u8bbe\u9a71\u52a8\u7a0b\u5e8f<\/li>\n\n\n\n<li>Linux\u7cfb\u7edf\u542f\u52a8\u65f6\uff0c\u4f1a\u52a0\u8f7dGPIO\u9a71\u52a8\u7a0b\u5e8f\uff0c\u5e76\u5c06GPIO\u5916\u8bbe\u5404\u4e2a\u7ba1\u811a\u6620\u5c04\u5230\u7cfb\u7edf\u7684\u5185\u5b58\u4e2d<\/li>\n\n\n\n<li>\u8fd9\u5757\u5185\u5b58\u7684\u5177\u4f53\u4f4d\u7f6e\uff08\u504f\u79fb\u91cf\uff09\uff0c\u8bb0\u5f55\u5728<strong>\/proc\/device-tree\/soc\/ranges<\/strong>\u4e2d<\/li>\n\n\n\n<li>\u7136\u540e\u8c03\u7528mmap\uff0c\u586b\u5165\u76f8\u5173\u7684\u504f\u79fb\u91cf\u7b49\u4fe1\u606f\uff0c\u53ef\u4ee5\u5c06\u5185\u5b58\u6620\u5c04\u5230\u7528\u6237\u7a7a\u95f4\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u6307\u9488\u76f4\u63a5\u8bbf\u95ee<\/li>\n\n\n\n<li>\u8fd9\u5757\u5185\u5b58\uff0c\u5305\u542b\u4e24\u5757\u4fe1\u606f\uff0c\u4e00\u5757\u662f\u5404\u4e2a\u7ba1\u811a\u8f93\u5165\/\u8f93\u51fa\u72b6\u6001\uff0c\u4e00\u5757\u662f\u5404\u4e2a\u7ba1\u811a\u7684\u5177\u4f53\u503c<\/li>\n\n\n\n<li>\u6211\u4eec\u4fee\u6539\u7b2c\u4e00\u5757\u5185\u5b58\u7684\u503c\uff0c\u53ef\u4ee5\u5c06\u8bbe\u5b9a\u4e0d\u540c\u7ba1\u811a\u7684\u8f93\u5165\u8f93\u51fa\u72b6\u6001<\/li>\n\n\n\n<li>\u6839\u636e\u8f93\u5165\/\u8f93\u51fa\u72b6\u6001\u518d\u4fee\u6539\u6216\u8005\u8bfb\u53d6\u7b2c\u4e8c\u5757\u5185\u5b58\u7684\u503c\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u4ece\u5404\u4e2a\u7ba1\u811a\u4e0a\u8bfb\u53d6\/\u5199\u5165\u9ad8\u4f4e\u7535\u5e73<\/li>\n\n\n\n<li>\u4ece\u800c\u6700\u7ec8\u5b9e\u73b0\u901a\u8fc7GPIO\u7ba1\u811a\u4f20\u9012\u4fe1\u606f\u7684\u529f\u80fd\uff08\u70b9\u4eaeLED\u7b49\uff09<\/li>\n<\/ul>\n\n\n\n<p>bcm2835\u8fd9\u4e2a\u5e93\uff0c\u4e25\u683c\u6765\u8bb2\u662f\u4e00\u4e2a\u7528\u6237\u7a7a\u95f4\u7684\u9a71\u52a8\u7a0b\u5e8f\uff08\u533a\u522b\u4e8e\u5185\u6838\u7a7a\u95f4\u7684\u9a71\u52a8\u7a0b\u5e8f\uff09\uff0c\u4ed6\u505a\u7684\u4e8b\u60c5\u5c31\u662f\u5c06\u4e0a\u8ff0\u8fc7\u7a0b\u5c01\u88c5\u6210\u7b80\u5355\u6613\u7528\u7684\u63a5\u53e3\uff0c\u65b9\u4fbf\u7528\u6237\u7a7a\u95f4\u7684\u5e94\u7528\u7a0b\u5e8f\uff08C\u4ee3\u7801\u3001python\u4ee3\u7801\u7b49\uff09\u63a7\u5236\u5916\u8bbe\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">6.\u53c2\u8003\u8d44\u6599<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u300aLinux\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\u300b\u4e2d\u6587\u7b2c\u4e09\u7248 <\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>1.\u524d\u8a00 \u524d\u9762\u7684\u6587\u7ae0\u4e2d\u6211\u4eec\u63d0\u5230\uff0c\u6811\u8393\u6d3e4\u642d\u8f7d\u7684SOC\u662f\u535a\u901aBCM2711\uff0c\u914d\u5957\u7684\u51fd\u6570\u5e93\u662fbcm2835-1.73.tar.gz\u3002 \u8fd9\u4e2a\u51fd\u6570\u5e93\u5b9e\u8d28\u4e0a\u53ea\u6709\u4e24\u4e2a\u5c0f\u6587\u4ef6&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"http:\/\/www.wangkaixuan.tech\/?p=4347\"> Read More<span class=\"screen-reader-text\">  Read More<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-4347","post","type-post","status-publish","format-standard","hentry","category-03-01-"],"_links":{"self":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts\/4347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4347"}],"version-history":[{"count":0,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts\/4347\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4347"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}