ST17H26之125KHz产生

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write_reg8(0x781,0x0f);//32M/(15+1) = 2M
write_reg16(0x79a, 16);//set pwm1 max cycle 125K = 2M/16
write_reg16(0x798, 8);//set pwm1 duty_cycle = 50% = 8/16
write_reg8(0x780, 0x02);
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