; Copyright (c) 2019 Arduino LLC. All right reserved. ; ; This library is free software; you can redistribute it and/or ; modify it under the terms of the GNU Lesser General Public ; License as published by the Free Software Foundation; either ; version 2.1 of the License, or (at your option) any later version. ; ; This library is distributed in the hope that it will be useful, ; but WITHOUT ANY WARRANTY; without even the implied warranty of ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. ; See the GNU Lesser General Public License for more details. ; ; You should have received a copy of the GNU Lesser General Public ; License along with this library; if not, write to the Free Software ; Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA .program pdm_pio .side_set 1 .wrap_target ; prova a cambiare edge ;sample on falling edge push iffull noblock side 1 ;nop side 1 ;nop side 0 in pins, 1 side 0 ;nop side 0 .wrap % c-sdk { #include "hardware/gpio.h" static inline void pdm_pio_program_init(PIO pio, uint sm, uint offset, uint clkPin, uint dataPin, float clkDiv) { pio_sm_config c = pdm_pio_program_get_default_config(offset); sm_config_set_sideset(&c, 1, false, false); //sm_config_set_in_shift(&c, false, true, 8); sm_config_set_in_shift(&c, false, false, 8); sm_config_set_in_pins(&c, dataPin); sm_config_set_sideset_pins(&c, clkPin); sm_config_set_clkdiv(&c, clkDiv); pio_sm_set_consecutive_pindirs(pio, sm, dataPin, 1, false); pio_sm_set_consecutive_pindirs(pio, sm, clkPin, 1, true); pio_sm_set_pins_with_mask(pio, sm, 0, (1u << clkPin) ); //pio_gpio_init(pio, dataPin); pio_gpio_init(pio, clkPin); pio_sm_init(pio, sm, offset, &c); pio_sm_set_enabled(pio, sm, true); } %}