{"id":282,"date":"2023-09-06T09:12:56","date_gmt":"2023-09-06T00:12:56","guid":{"rendered":"https:\/\/www.aqua-informatics.jp\/?p=282"},"modified":"2023-09-06T09:15:56","modified_gmt":"2023-09-06T00:15:56","slug":"%e6%b5%9c%e6%9d%be%e3%83%9b%e3%83%88%e3%83%8b%e3%82%af%e3%82%b9c12880ma%e3%82%92raspberry-pi-pico%e3%80%81micropython%e3%81%a7%e4%bd%bf%e3%81%862","status":"publish","type":"post","link":"https:\/\/www.aqua-informatics.jp\/?p=282","title":{"rendered":"\u6d5c\u677e\u30db\u30c8\u30cb\u30af\u30b9c12880ma\u3092Raspberry Pi Pico\u3001MicroPython\u3067\u4f7f\u3046(2)"},"content":{"rendered":"\n

\u6d5c\u677e\u30db\u30c8\u30cb\u30af\u30b9C12880MA\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u30c1\u30e3\u30fc\u30c8\u3002\u30b9\u30bf\u30fc\u30c8\u30d1\u30eb\u30b9(ST)\u304c1\u21920\u306b\u843d\u3061\u3066\u304b\u3089\u300188\u30d1\u30eb\u30b9\u76ee\u307e\u3067\u3092PIO\u3067\u751f\u6210\u3057\u305f\u5f8c\u3001PIO\u3092\u505c\u6b62\u3002\u30d3\u30c7\u30aa\u4fe1\u53f7\u306f\u3072\u305f\u3059\u3089\u6700\u901f\u3067ADC\u3067\u53d6\u308a\u8fbc\u3080\u3002\u591a\u5c11\u9045\u308c\u3066\u3082\u53d6\u308a\u3053\u307c\u3059\u3053\u3068\u306f\u306a\u3044\u3088\u3046\u3067\u3042\u308b\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u30df\u30cb\u5206\u5149\u5668 C12880MA \u30c6\u30af\u30cb\u30ab\u30eb\u30b7\u30fc\u30c8 \u3088\u308a<\/a><\/p>\n\n\n\n

Video\u4fe1\u53f7\u8aad\u307f\u8fbc\u307f\u524d\u306e\u30af\u30ed\u30c3\u30af\u751f\u6210<\/p>\n\n\n\n

    def accum_light(self, usec=250):\n        # accumulation of light\n        # The unit of usec is [micro sec]. \n        \n        THP_ST_pulse = int(usec \/ 10**6 * self.freq + 3 - 52)\n        TPI_ST = int( 40 \/ self.freq * 10**6 ) + usec\n        \n        # State Machine reset \n        self.sm_reset()\n        \n        self.sm.active(1)\n        self.sm.put(THP_ST_pulse)     # The minimum pulse is 6.\n        self.sm.put(87)\n        time.sleep_us(TPI_ST)\n        self.sm.active(0)<\/code><\/pre><\/div>\n\n\n\n
288\u500b\u306eVideo\u4fe1\u53f7\u8aad\u307f\u8fbc\u307f\u6642\u306e\u30af\u30ed\u30c3\u30af\u751f\u6210(\u3068ADC\u306b\u3088\u308b\u30c7\u30fc\u30bf\u53d6\u5f97)\u3002<\/p>\n\n\n\n
    def acquire(self, usec=250):\n        \n        self.accum_light(usec)\n        \n        clk = Pin(CLK_pin, Pin.OUT)\n        data = []\n    \n        for i in range(288):\n        \n            clk.value(1)\n            data.append(self.adc.read_u16())\n            clk.value(0)\n\n        # Terminate by sending 7 pulses after all data is acquired.\n        # This is not specified in the datasheet.\n\n        for i in range(7):\n            clk.value(1)\n            clk.value(0)\n            \n        return(data)<\/code><\/pre><\/div>\n\n\n\n
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