Pls I've run into trouble setting up centre aligned complementary pwm using stm32f103c8t6. Centre aligned Period is 2x but dma doesn't work anymore. But if I go to Edge aligned Period is half and dma works . I an using dma1_chn2 for dma ... pls could u piont me in the right direction.....I don't want HAL
The board manual or the chip datasheet will tell you the info regarding what pins have access to what timer channels/functions. Each timer has multiple functionality - eg. input capture, output compare, PWM etc. Channels are independent set of registers that allow the timer to be used for a specific functionality.