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Merge pull request #4187 from 1-rafael-1/rp235x-overclocking

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RP235x overclocking
This commit is contained in:
Dario Nieuwenhuis
2025-05-13 21:45:22 +00:00
committed by GitHub
parent 5caa4ac51b 981ef20f83
commit 5a19b64fec
5 changed files with 316 additions and 71 deletions
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49
tests/rp/src/bin/overclock.rs
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@@ -7,14 +7,8 @@ teleprobe_meta::target!(b"rpi-pico");
teleprobe_meta::target!(b"pimoroni-pico-plus-2");
use defmt::info;
#[cfg(feature = "rp2040")]
use defmt::{assert, assert_eq};
use embassy_executor::Spawner;
use embassy_rp::clocks;
#[cfg(feature = "rp2040")]
use embassy_rp::clocks::ClockConfig;
#[cfg(feature = "rp2040")]
use embassy_rp::clocks::CoreVoltage;
use embassy_rp::clocks::{clk_sys_freq, core_voltage, ClockConfig, CoreVoltage};
use embassy_rp::config::Config;
use embassy_time::Instant;
use {defmt_rtt as _, panic_probe as _};
@@ -23,23 +17,26 @@ const COUNT_TO: i64 = 10_000_000;
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
#[cfg(feature = "rp2040")]
let mut config = Config::default();
#[cfg(not(feature = "rp2040"))]
let config = Config::default();
// Initialize with 200MHz clock configuration for RP2040, other chips will use default clock
#[cfg(feature = "rp2040")]
// Initialize with 200MHz clock configuration
config.clocks = ClockConfig::system_freq(200_000_000).unwrap();
// if we are rp235x, we need to manually set the core voltage. rp2040 should do this automatically
#[cfg(feature = "rp235xb")]
{
config.clocks = ClockConfig::system_freq(200_000_000);
let voltage = config.clocks.core_voltage;
assert!(matches!(voltage, CoreVoltage::V1_15), "Expected voltage scale V1_15");
config.clocks.core_voltage = CoreVoltage::V1_15;
}
let _p = embassy_rp::init(config);
// We should be at core voltage of 1.15V
assert_eq!(core_voltage().unwrap(), CoreVoltage::V1_15, "Core voltage is not 1.15V");
// We should be at 200MHz
assert_eq!(clk_sys_freq(), 200_000_000, "System clock frequency is not 200MHz");
// Test the system speed
let (time_elapsed, clk_sys_freq) = {
let time_elapsed = {
let mut counter = 0;
let start = Instant::now();
while counter < COUNT_TO {
@@ -47,24 +44,26 @@ async fn main(_spawner: Spawner) {
}
let elapsed = Instant::now() - start;
(elapsed.as_millis(), clocks::clk_sys_freq())
elapsed.as_millis()
};
// Report the elapsed time, so that the compiler doesn't optimize it away for chips other than RP2040
// Tests will fail if unused variables are detected:
// Report the elapsed time, so that the compiler doesn't optimize it away for the chip not on test
info!(
"At {}Mhz: Elapsed time to count to {}: {}ms",
clk_sys_freq / 1_000_000,
clk_sys_freq() / 1_000_000,
COUNT_TO,
time_elapsed
);
// Check if the elapsed time is within expected limits
// for rp2040 we expect about 600ms
#[cfg(feature = "rp2040")]
{
// we should be at 200MHz
assert_eq!(clk_sys_freq, 200_000_000, "System clock frequency is not 200MHz");
// At 200MHz, the time to count to 10_000_000 should be at 600ms, testing with 1% margin
assert!(time_elapsed <= 606, "Elapsed time is too long");
}
// allow 1% error
assert!(time_elapsed < 606, "Elapsed time is too long");
// for rp235x we expect about 450ms
#[cfg(feature = "rp235xb")]
assert!(time_elapsed < 455, "Elapsed time is too long");
cortex_m::asm::bkpt();
}