Mirror/betaflight
1
0
Fork 0
mirror of https://github.com/betaflight/betaflight.git synced 2025-07-13 03:20:00 +03:00
Code Issues Wiki Activity

pwm_beeper_pico.c updates after code review.

Browse source
This commit is contained in:
Matthew Selby 2025-07-01 20:06:42 +01:00
parent 3721debfdd
commit 31ac50dfc2
1 changed files with 12 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

20
src/platform/PICO/pwm_beeper_pico.c
View file

@ -30,14 +30,14 @@
#include "hardware/gpio.h"
#include "hardware/pwm.h"
static bool beeperInit;
static bool beeperConfigured;
static bool beeperEnabled;
static int beeperGPIO;
static uint pwmSlice;
void pwmWriteBeeper(bool on)
{
if (beeperInit) {
if (beeperConfigured) {
gpio_set_outover(beeperGPIO, on ? GPIO_OVERRIDE_NORMAL : GPIO_OVERRIDE_LOW);
pwm_set_enabled(pwmSlice, on);
beeperEnabled = on;
@ -58,9 +58,15 @@ void beeperPwmInit(const ioTag_t tag, uint16_t frequency)
IOInit(beeperIO, OWNER_BEEPER, 0);
// f = sysclk / div / wrap
uint32_t clock_divide = 64; // gives a decent range of frequencies (down to 36Hz) for RP2350 at 150MHz
float wrap_f = ((float)SystemCoreClock) / frequency / clock_divide;
uint16_t wrap = (uint16_t)(wrap_f > 65535 ? 65535 : wrap_f);
// max clock divide is just under 256. Divide of 128 allows down to ~20Hz or so (at 150MHz).
uint32_t clock_divide;
for (clock_divide = 1; clock_divide < 256; clock_divide *= 2) {
if (SystemCoreClock / frequency / clock_divide < 0xffff) {
break;
}
}
uint16_t wrap = MIN(0xffff, SystemCoreClock / frequency / clock_divide);
pwm_config cfg = pwm_get_default_config();
pwm_config_set_clkdiv_int(&cfg, clock_divide);
pwm_config_set_wrap(&cfg, wrap);
@ -69,9 +75,7 @@ void beeperPwmInit(const ioTag_t tag, uint16_t frequency)
gpio_set_function(beeperGPIO, GPIO_FUNC_PWM);
pwm_set_gpio_level(beeperGPIO, wrap >> 1); // 50% square wave
beeperEnabled = false;
beeperInit = true;
} else {
beeperInit = false;
beeperConfigured = true;
}
}