MT8880 is a DTMF signal decoder chip in the smart phone to use a lot of control, the inside has a separate dial-up hook and ring detection process, each program had detailed notes, very easy to use

MT8880模块使用例程\MT8880模块用户程序.c
..................\工程：基于PSTN的智能家居系统设计\主控制器\310
..................\................................\........\310.LIB
..................\................................\........\310.lnp
..................\................................\........\310.M51
..................\................................\........\310.Opt
..................\................................\........\310.plg
..................\................................\........\310.Uv2
..................\................................\........\310.__b
..................\................................\........\310_Opt.Bak
..................\................................\........\310_Uv2.Bak
..................\................................\........\ExtDll.iex
..................\................................\........\F310_INIT.C
..................\................................\........\F310_INIT.LST
..................\................................\........\F310_INIT.OBJ
..................\................................\........\f330_spi.c
..................\................................\........\f330_spi.LST
..................\................................\........\f330_spi.OBJ
..................\................................\........\function_statement.h
..................\................................\........\key_scan.c
..................\................................\........\key_scan.LST
..................\................................\........\key_scan.OBJ
..................\................................\........\main.c
..................\................................\........\main.LST
..................\................................\........\main.OBJ
..................\................................\........\MT8880.C
..................\................................\........\MT8880.LST
..................\................................\........\MT8880.OBJ
..................\................................\........\nRF24L01.C
..................\................................\........\nRF24L01.LST
..................\................................\........\nRF24L01.OBJ
..................\................................\........\Nrf24l01_cmd.h
..................\................................\........\picture.c
..................\................................\........\picture.LST
..................\................................\........\picture.OBJ
..................\................................\........\SPI_M12864.C
..................\................................\........\SPI_M12864.LST
..................\................................\........\SPI_M12864.OBJ
..................\................................\........\STARTUP.A51
..................\................................\........\STARTUP.LST
..................\................................\........\STARTUP.OBJ
..................\................................\........\test.c
..................\................................\........\yuyin.c
..................\................................\........\yuyin.LST
..................\................................\........\yuyin.OBJ
..................\................................\主控制器
..................\................................\无线节点\330AND24L01.Opt
..................\................................\........\330AND24L01.Uv2
..................\................................\........\330AND24L01_Opt.Bak
..................\................................\........\330AND24L01_Uv2.Bak
..................\................................\........\ADC.C
..................\................................\........\ADC.LST
..................\................................\........\ADC.OBJ
..................\................................\........\bi_ye_she_ji_slave
..................\................................\........\bi_ye_she_ji_slave.lnp
..................\................................\........\bi_ye_she_ji_slave.M51
..................\................................\....

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