M-Labs/ionpak-thermostat
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tec: init freq pins for 1 MHz switching

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This commit is contained in:
Astro 2019-11-14 01:59:28 +01:00
parent 13771bf770
commit 2773ba47fe
2 changed files with 18 additions and 1 deletions
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4
firmware/src/board/gpio.rs
View File

@ -72,7 +72,11 @@ pub struct PE4;
def_gpio!(GPIO_PORTE_AHB, PE4, 4);
pub struct PE5;
def_gpio!(GPIO_PORTE_AHB, PE5, 5);
pub struct PK1;
def_gpio!(GPIO_PORTK, PK1, 1);
pub struct PP2;
def_gpio!(GPIO_PORTP, PP2, 2);
pub struct PP3;
def_gpio!(GPIO_PORTP, PP3, 3);
pub struct PQ4;
def_gpio!(GPIO_PORTQ, PQ4, 4);

15
firmware/src/tec.rs
View File

@ -1,6 +1,6 @@
use core::fmt;
use crate::board::pwm::{self, PwmChannel, PwmPeripheral};
use crate::board::gpio::{Gpio, GpioOutput, PP2, PP3};
use crate::board::gpio::{Gpio, GpioOutput, PP2, PP3, PK1, PQ4};
use embedded_hal::digital::v2::OutputPin;
#[derive(Clone, Copy, Debug)]
@ -46,6 +46,17 @@ where
pin
}
fn setup_freq<G>(gpio: G)
where
G: Gpio,
GpioOutput<G>: OutputPin,
{
let mut pin = gpio.into_output();
// Switching Frequency Select
// high: 1 MHz, low: 500 kHz
let _ = pin.set_high();
}
/// Thermo-Electric Cooling device controlled through four PWM
/// channels
pub struct Tec<MaxIPos: PwmChannel, MaxINeg: PwmChannel, ISet: PwmChannel, MaxV: PwmChannel, SHDN: OutputPin> {
@ -61,6 +72,7 @@ impl Tec<pwm::T2CCP0, pwm::T2CCP1, pwm::T3CCP0, pwm::T3CCP1, GpioOutput<PP2>> {
let (max_i_pos, max_i_neg) = tm4c129x::TIMER2::split();
let (i_set, max_v) = tm4c129x::TIMER3::split();
let shdn = setup_shdn(PP2);
setup_freq(PK1);
Tec { max_i_pos, max_i_neg, i_set, max_v, shdn }
}
}
@ -70,6 +82,7 @@ impl Tec<pwm::T4CCP0, pwm::T4CCP1, pwm::T5CCP0, pwm::T5CCP1, GpioOutput<PP3>> {
let (max_i_pos, max_i_neg) = tm4c129x::TIMER4::split();
let (i_set, max_v) = tm4c129x::TIMER5::split();
let shdn = setup_shdn(PP3);
setup_freq(PQ4);
Tec { max_i_pos, max_i_neg, i_set, max_v, shdn }
}
}