blob: a8bcd81f70cf8c46611917811a2296fdc573c957 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
//! QMI CS1 peripheral for RP235x
//!
//! This module provides access to the QMI CS1 functionality for use with external memory devices
//! such as PSRAM. The QMI (Quad SPI) controller supports CS1 as a second chip select signal.
//!
//! This peripheral is only available on RP235x chips.
#![cfg(feature = "_rp235x")]
use embassy_hal_internal::{Peri, PeripheralType};
use crate::gpio::Pin as GpioPin;
use crate::{pac, peripherals};
/// QMI CS1 driver.
pub struct QmiCs1<'d> {
_inner: Peri<'d, peripherals::QMI_CS1>,
}
impl<'d> QmiCs1<'d> {
/// Create a new QMI CS1 instance.
pub fn new(
qmi_cs1: Peri<'d, peripherals::QMI_CS1>,
cs1: Peri<'d, impl QmiCs1Pin>,
) -> Self {
// Configure CS1 pin for QMI function (funcsel = 9)
cs1.gpio().ctrl().write(|w| w.set_funcsel(9));
// Configure pad settings for high-speed operation
cs1.pad_ctrl().write(|w| {
#[cfg(feature = "_rp235x")]
w.set_iso(false);
w.set_ie(true);
w.set_drive(pac::pads::vals::Drive::_12M_A);
w.set_slewfast(true);
});
Self { _inner: qmi_cs1 }
}
/// Get access to the QMI peripheral registers.
///
/// This allows low-level access to configure the QMI controller for specific memory devices.
pub fn regs(&self) -> pac::qmi::Qmi {
pac::QMI
}
}
trait SealedInstance {
fn regs(&self) -> pac::qmi::Qmi;
}
/// QMI CS1 instance trait.
#[allow(private_bounds)]
pub trait Instance: SealedInstance + PeripheralType {}
impl SealedInstance for peripherals::QMI_CS1 {
fn regs(&self) -> pac::qmi::Qmi {
pac::QMI
}
}
impl Instance for peripherals::QMI_CS1 {}
/// CS1 pin trait for QMI.
pub trait QmiCs1Pin: GpioPin {}
// Implement pin traits for CS1-capable GPIO pins
impl QmiCs1Pin for peripherals::PIN_0 {}
impl QmiCs1Pin for peripherals::PIN_8 {}
impl QmiCs1Pin for peripherals::PIN_19 {}
#[cfg(feature = "rp235xb")]
impl QmiCs1Pin for peripherals::PIN_47 {}
|
