F302 怎么利用SYSCFG_CFGR1寄存器ENCODER_ MODE实现MT法测速

zhanghankui

在F302数据手册中
Bits 23:22 ENCODER_MODE: Encoder mode
This bit is set and cleared by software.
00: No redirection.
01: TIM2 IC1 and TIM2 IC2 are connected to TIM15 IC1 and TIM15 IC2 respectively.
10: TIM3 IC1 and TIM3 IC2 are connected to TIM15 IC1 and TIM15 IC2
respectively (STM32F302xB/C devices only).
11: TIM4 IC1 and TIM4 IC2 are connected to TIM15 IC1 and TIM15 IC2
respectively(STM32F302xB/C devices only).
Bit 21 I2C2_FMP: I2C2 fast mode Plus driving capability
这里有提到编码器模式，使用单独的TIM2或TIM3就可以完成M法测速，是不需要配置SYSCFG_CFGR1寄存器的，我想这里应该是可以配合TIM15实现M/T法测速，但是把IC1 IC2连接，还是没有办法利用TIM15的XOR功能，手册上也没有讲，官网也找不到demo，不知道是怎么操作实现的。
有人关注过这方面的实现吗？

zhanghankui

up up up

正点原子

帮顶

龙的传人98

帮顶，T法测速我还没搞出来