Calling the fraction a divider insinuates that this function is analogous to, for instance, pwm_config_set_clkdiv_int_frac() .
But that function divides clk_sys by a fraction, while dma_timer_set_fraction() multiplies clk_sys by a fraction.
I find it a little bit counterintuitive that RP2040 scales DMA timers with a multiplier and PWM timers with a divider, but that's what the datasheet says it does.
lurch
commented
3 months ago
Calling the fraction a divider insinuates that this function is analogous to, for instance, pwm_config_set_clkdiv_int_frac() . But that function divides clk_sys by a fraction, while dma_timer_set_fraction() multiplies clk_sys by a fraction.
I find it a little bit counterintuitive that RP2040 scales DMA timers with a multiplier and PWM timers with a divider, but that's what the datasheet says it does.