From a6a2a035d57ced9a7a9bb2ef325885063ea83295 Mon Sep 17 00:00:00 2001 From: kbleeke Date: Sun, 19 Mar 2023 16:43:46 +0100 Subject: even faster pio speed are possible --- examples/rpi-pico-w/src/pio.rs | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) (limited to 'examples') diff --git a/examples/rpi-pico-w/src/pio.rs b/examples/rpi-pico-w/src/pio.rs index abb71b5de..1bf304d5d 100644 --- a/examples/rpi-pico-w/src/pio.rs +++ b/examples/rpi-pico-w/src/pio.rs @@ -2,7 +2,7 @@ use core::slice; use cyw43::SpiBusCyw43; use embassy_rp::dma::Channel; -use embassy_rp::gpio::{Pin, Pull}; +use embassy_rp::gpio::{Drive, Pin, Pull, SlewRate}; use embassy_rp::pio::{PioStateMachine, ShiftDirection}; use embassy_rp::relocate::RelocatedProgram; use embassy_rp::{pio_instr_util, Peripheral}; @@ -43,10 +43,11 @@ where "out pins, 1 side 0" "jmp x-- lp side 1" "set pindirs, 0 side 0" - // "nop side 1" + "nop side 1" "lp2:" - "in pins, 1 side 0" - "jmp y-- lp2 side 1" + "in pins, 1 side 1" + "jmp y-- lp2 side 0" + ".wrap" ); @@ -55,15 +56,22 @@ where let mut pin_io = sm.make_pio_pin(dio); pin_io.set_pull(Pull::Down); pin_io.set_schmitt(true); - let pin_clk = sm.make_pio_pin(clk); + pin_io.set_input_sync_bypass(true); + + let mut pin_clk = sm.make_pio_pin(clk); + pin_clk.set_drive_strength(Drive::_12mA); + pin_clk.set_slew_rate(SlewRate::Fast); sm.write_instr(relocated.origin() as usize, relocated.code()); + // 32 Mhz + sm.set_clkdiv(0x03E8); + // 16 Mhz - sm.set_clkdiv(0x07d0); + // sm.set_clkdiv(0x07d0); // 8Mhz - sm.set_clkdiv(0x0a_00); + // sm.set_clkdiv(0x0a_00); // 1Mhz // sm.set_clkdiv(0x7d_00); -- cgit