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Add constants for cmd_word arguments

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This commit adds constants intended to be used with the `cmd_word`
function.

The motivation for this to (hopefully) improve the readability of the
code.
This commit is contained in:
Daniel Bevenius 2022-09-23 15:01:09 +02:00
parent 9db9333d05
commit 9aaefa6e71
1 changed files with 16 additions and 9 deletions
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25
src/lib.rs
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@ -32,6 +32,13 @@ fn swap16(x: u32) -> u32 {
x.rotate_left(16)
}
// CYW_SPID command structure constants.
const WRITE: bool = true;
const READ: bool = false;
const INC_ADDR: bool = true;
#[allow(unused)]
const FIXED_ADDR: bool = false;
fn cmd_word(write: bool, incr: bool, func: u32, addr: u32, len: u32) -> u32 {
(write as u32) << 31 | (incr as u32) << 30 | (func & 0b11) << 28 | (addr & 0x1FFFF) << 11 | (len & 0x7FF)
}
@ -734,7 +741,7 @@ where
if status & STATUS_F2_PKT_AVAILABLE != 0 {
let len = (status & STATUS_F2_PKT_LEN_MASK) >> STATUS_F2_PKT_LEN_SHIFT;
let cmd = cmd_word(false, true, FUNC_WLAN, 0, len);
let cmd = cmd_word(READ, INC_ADDR, FUNC_WLAN, 0, len);
self.spi
.transaction(|bus| {
@ -799,7 +806,7 @@ where
trace!(" {:02x}", &buf8[..total_len.min(48)]);
let cmd = cmd_word(true, true, FUNC_WLAN, 0, total_len as _);
let cmd = cmd_word(WRITE, INC_ADDR, FUNC_WLAN, 0, total_len as _);
self.spi
.transaction(|bus| {
let bus = unsafe { &mut *bus };
@ -993,7 +1000,7 @@ where
trace!(" {:02x}", &buf8[..total_len.min(48)]);
let cmd = cmd_word(true, true, FUNC_WLAN, 0, total_len as _);
let cmd = cmd_word(WRITE, INC_ADDR, FUNC_WLAN, 0, total_len as _);
self.spi
.transaction(|bus| {
@ -1081,7 +1088,7 @@ where
self.backplane_set_window(addr).await;
let cmd = cmd_word(false, true, FUNC_BACKPLANE, window_offs, len as u32);
let cmd = cmd_word(READ, INC_ADDR, FUNC_BACKPLANE, window_offs, len as u32);
self.spi
.transaction(|bus| {
@ -1126,7 +1133,7 @@ where
self.backplane_set_window(addr).await;
let cmd = cmd_word(true, true, FUNC_BACKPLANE, window_offs, len as u32);
let cmd = cmd_word(WRITE, INC_ADDR, FUNC_BACKPLANE, window_offs, len as u32);
self.spi
.transaction(|bus| {
@ -1245,7 +1252,7 @@ where
}
async fn readn(&mut self, func: u32, addr: u32, len: u32) -> u32 {
let cmd = cmd_word(false, true, func, addr, len);
let cmd = cmd_word(READ, INC_ADDR, func, addr, len);
let mut buf = [0; 1];
self.spi
@ -1268,7 +1275,7 @@ where
}
async fn writen(&mut self, func: u32, addr: u32, val: u32, len: u32) {
let cmd = cmd_word(true, true, func, addr, len);
let cmd = cmd_word(WRITE, INC_ADDR, func, addr, len);
self.spi
.transaction(|bus| {
@ -1283,7 +1290,7 @@ where
}
async fn read32_swapped(&mut self, addr: u32) -> u32 {
let cmd = cmd_word(false, true, FUNC_BUS, addr, 4);
let cmd = cmd_word(READ, INC_ADDR, FUNC_BUS, addr, 4);
let mut buf = [0; 1];
self.spi
@ -1302,7 +1309,7 @@ where
}
async fn write32_swapped(&mut self, addr: u32, val: u32) {
let cmd = cmd_word(true, true, FUNC_BUS, addr, 4);
let cmd = cmd_word(WRITE, INC_ADDR, FUNC_BUS, addr, 4);
self.spi
.transaction(|bus| {