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Add pwm sound sample code

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cuu
2025-03-29 16:42:05 +08:00
parent 188f2ca65b
commit c99316b917
6 changed files with 3547 additions and 3 deletions
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38
Code/picocalc_helloworld/main.c
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@@ -6,10 +6,11 @@
#include <string.h>
#include "pico/stdlib.h"
#include "hardware/gpio.h"
#include "hardware/clocks.h"
#include "i2ckbd.h"
#include "lcdspi.h"
#include "psram_spi.h"
#include "pwm_sound.h"
const uint LEDPIN = 25;
psram_spi_inst_t* async_spi_inst;
@@ -174,9 +175,39 @@ int psram_test(psram_spi_inst_t*psram_spi){
lcd_print_string("PSRAM testing done\n");
}
#include "sample.h"
int wav_position = 0;
void pwm_interrupt_handler() {
int slice_l = pwm_gpio_to_slice_num(AUDIO_PIN_L);
int slice_r = pwm_gpio_to_slice_num(AUDIO_PIN_R);
pwm_clear_irq(slice_l);
pwm_clear_irq(slice_r);
if (wav_position < (WAV_DATA_LENGTH << 3) - 1) {
pwm_set_chan_level(pwm_gpio_to_slice_num(AUDIO_PIN_L), PWM_CHAN_A, WAV_DATA[wav_position >> 3]);
pwm_set_chan_level(pwm_gpio_to_slice_num(AUDIO_PIN_R), PWM_CHAN_B, WAV_DATA[wav_position >> 3]);
wav_position++;
} else {
wav_position = 0; // Stop
pwm_set_chan_level(slice_l, PWM_CHAN_A, 0);
pwm_set_chan_level(slice_r, PWM_CHAN_B, 0);
pwm_set_irq_enabled(slice_l, false);
pwm_set_irq_enabled(slice_r, false);
irq_remove_handler(PWM_IRQ_WRAP, pwm_interrupt_handler);
//
}
}
int main() {
stdio_init_all();
set_sys_clock_khz(133000, true);
init_i2c_kbd();
lcd_init();
@@ -190,10 +221,13 @@ int main() {
sleep_ms(500);
gpio_put(LEDPIN, 0);
psram_spi_inst_t psram_spi = psram_spi_init_clkdiv(pio1, -1,1.0f,true);
init_pwm(pwm_interrupt_handler);
psram_spi_inst_t psram_spi = psram_spi_init_clkdiv(pio1, -1,1.0f,true);
psram_test(&psram_spi);
while (1) {
int c = lcd_getc(0);
if(c != -1 && c > 0) {
lcd_putc(0,c);