The chip manual states that AFR0 and AFR1 cannot be used at the same time
AFR1 Alternate function remapping option 1 (2)
0: AFR1 remapping option inactive: default alternate function(1);
1: Port A3 alternate function = SPI_NSS; port D2 alternate function =TIM2_CH3.
AFR0 Alternate function remapping option 0(2)
0: AFR0 remapping option inactive: Default alternate functions(1);
1: Port C5 alternate function = TIM2_CH1; port C6 alternate function =TIM1_CH1; port C7 alternate function = TIM1_CH2.
1. Refer to the pinout description.
2. Do not use more than one remapping option in the same port. It is forbidden to enable both AFR1 and AFR0.
In fact, there is no problem in testing simultaneous use, just pay attention to the ports.
In addition, ST-LINK-->option bytes in IAR also need to be configured accordingly. The figure shows that AFR0 is configured.
The official STVP is also configured during burning.
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