ʾʹõԴ
TIM1 BRK     --   PB4
TIM1 CH1     --   PA0
TIM1 CH1N    --   PB3
TIM1 CH2     --   PB0
TIM1 CH2N    --   PA4
TIM1 CH3     --   PA1
TIM1 CH3N    --   PB5


ʾḶ́
1ϵʱӣRCH 48MHz
2ʼSystick100msһжϣ
3TIM1ΪPWMģʽ3ͨ;
       ͨ1CC1PЧCC1NPЧ
                  ͨ1еƽΪЧͨ1еƽΪЧ
       ͨ2CCC2PЧCC2NPЧ
                  ͨ2еƽΪЧͨ2еƽΪЧ
       ͨ3CC3PЧCC3NPЧ
                  ͨ3еƽΪЧͨ3еƽΪЧ
   
4ͨ1εռձΪ50%
       ͨ2εռձΪ37.5%
       ͨ3εռձΪ25%

5Systickжʱһλ¼

ע⣺
16PWMֵ£
         -----------------------------------------------
        | Step1 | Step2 | Step3 | Step4 | Step5 | Step6 |
   ----------------------------------------------------------
   CH1  |   1   |   1   |   0   |   0   |   0   |   0   |
   ----------------------------------------------------------
   CH1N |   0   |   0   |   0   |   1   |   1   |   0   |
   ----------------------------------------------------------
   CH2  |   0   |   0   |   1   |   1   |   0   |   0   |
   ----------------------------------------------------------
   CH2N |   1   |   0   |   0   |   0   |   0   |   1   |
   ----------------------------------------------------------
   CH3  |   0   |   0   |   0   |   0   |   1   |   1   |
   ----------------------------------------------------------
   CH3N |   0   |   1   |   1   |   0   |   0   |   0   |
   ----------------------------------------------------------
   
2Ϊֹ·¼TIM1 BRKӦΪ͵ƽ