dds: add register io

This commit is contained in:
occheung 2020-08-17 12:15:11 +08:00
parent afe00402b7
commit 8547610661
3 changed files with 34 additions and 6 deletions

View File

@ -55,7 +55,7 @@ construct_bitmask!(CFR3Mask; u32;
I_CP, 19, 3,
VCO_SEL, 24, 3,
DRV0, 28, 2
)
);
const WRITE_MASK :u8 = 0x00;
const READ_MASK :u8 = 0x80;
@ -75,7 +75,7 @@ where
}
}
impl<SPI, E> Transfer<u8> for ConfigRegister<SPI>
impl<SPI, E> Transfer<u8> for DDS<SPI>
where
SPI: Transfer<u8, Error = E>
{
@ -97,16 +97,41 @@ macro_rules! impl_register_io {
$(
$reg_addr => {
assert_eq!(bytes.len(), $reg_byte_size);
let arr: [u8; $reg_byte_size + 1] = [addr, 0; $reg_byte_size];
let mut arr: [u8; $reg_byte_size + 1] = [0; ($reg_byte_size + 1)];
arr[0] = addr | WRITE_MASK;
for i in 0..$reg_byte_size {
arr[i+1] = bytes[i];
}
match self.spi.transfer(words).map_err(Error<E>) {
match self.spi.transfer(&mut arr).map_err(Error::SPI) {
Ok(v) => Ok(()),
Err(e) => Err(e),
},
}
},
)*
_ => panic!("Bad address for DDS writing.")
}
}
pub fn read_register<'w>(&mut self, addr: u8, bytes: &'w mut[u8]) -> Result<&'w [u8], Error<E>> {
match addr {
$(
$reg_addr => {
assert_eq!(bytes.len(), $reg_byte_size);
let mut arr: [u8; $reg_byte_size + 1] = [0; ($reg_byte_size + 1)];
arr[0] = addr | READ_MASK;
match self.spi.transfer(&mut arr).map_err(Error::SPI) {
Ok(ret) => {
assert_eq!(ret.len(), $reg_byte_size + 1);
for i in 0..$reg_byte_size {
bytes[i] = ret[i+1];
}
Ok(bytes)
},
Err(e) => Err(e),
}
},
)*
_ => panic!("Bad address for DDS reading.")
}
}
}

View File

@ -19,7 +19,7 @@ use crate::spi_slave::Parts;
pub mod config_register;
pub mod attenuator;
pub mod dds;
/*
* Enum for structuring error

View File

@ -25,6 +25,7 @@ use firmware::{
ConfigRegister,
CFGMask,
},
dds::DDS,
};
#[entry]
@ -110,6 +111,8 @@ fn main() -> ! {
(CFGMask::DIV, 0x0),
]).unwrap()).unwrap();
let mut dds = DDS::new(parts.spi4);
loop {
nop();
}