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doc: first release
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readme.md
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# cc2640r2-etag
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cc2640r2 电子标签改电子时钟固件.
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目前支持,
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* cc2640r2l_2in13_ssd1680_250x122
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* cc2640r2l_2in9_ssd1680a_296x128
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单节或者双节 CR2450 电池供电.
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## 编译
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IAR 9.40 或 CCS 12.5
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SDK: simplelink_cc2640r2_sdk_1_40_00_45
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直接 IDE 编译出固件刷入即可.
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## 烧写
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电子标签为 cjtag 2 wire, 需要 xds 或者 jlink 烧写器.
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## 低功耗蓝牙 BLE5
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电子标签使用 BLE5 配置, 兼容 4.2.
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可使用 toos 下 cc2640r2_etag.html (chrome 蓝牙) 配置, 或手机端 nRF connect App 配置.
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GATT 配置,
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* Main Service UUID: FFF0,
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* Characteristic 配置,
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- UUID: FFF1, Unix Epoch 时间, uint32, 默认为 0 (1970-01-01)
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- UUID: FFF2, 时区偏移分钟, int32, 默认为北京时区 (+8*60)
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- UUID: FFF3, 电池电压 mV, uint16
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- UUID: FFF4, 温度 摄氏度, int8, (-127 ~ +128)
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