NaxdyOrg/embassy
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Buffer data to be written to flash in ram if it does not already reside in ram

Browse source
This commit is contained in:
Mathias 2022-10-26 14:47:32 +02:00
parent 80e58426fc
commit 1669e39565
2 changed files with 27 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

34
embassy-rp/src/flash.rs
View file

@ -55,6 +55,8 @@ pub struct Flash<'d, T: Instance, const FLASH_SIZE: usize>(PhantomData<&'d mut T
impl<'d, T: Instance, const FLASH_SIZE: usize> Flash<'d, T, FLASH_SIZE> {
pub fn new(_flash: impl Peripheral<P = T> + 'd) -> Self {
// FIXME: WHY is this needed?!
cortex_m::asm::delay(50_000);
Self(PhantomData)
}
@ -163,15 +165,24 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> NorFlash for Flash<'d, T, FLASH_S
// Write aligned slice of length in multiples of 256 bytes
// If the remaining bytes to be written is more than a full page.
if remaining_len >= PAGE_SIZE {
let aligned_data = &bytes[start_padding..end_padding];
let aligned_offset = if start_padding > 0 {
let mut aligned_offset = if start_padding > 0 {
offset as usize + padded_offset
} else {
offset as usize
};
unsafe { self.in_ram(|| ram_helpers::flash_range_program(aligned_offset as u32, aligned_data, true)) }
if bytes.as_ptr() as usize >= 0x2000_0000 {
let aligned_data = &bytes[start_padding..end_padding];
unsafe { self.in_ram(|| ram_helpers::flash_range_program(aligned_offset as u32, aligned_data, true)) }
} else {
for chunk in bytes[start_padding..end_padding].chunks_exact(PAGE_SIZE) {
let mut ram_buf = [0xFF_u8; PAGE_SIZE];
ram_buf.copy_from_slice(chunk);
unsafe { self.in_ram(|| ram_helpers::flash_range_program(aligned_offset as u32, &ram_buf, true)) }
aligned_offset += PAGE_SIZE;
}
}
}
// Pad in the end
@ -273,11 +284,14 @@ mod ram_helpers {
pub unsafe fn flash_range_erase(addr: u32, len: u32, use_boot2: bool) {
let mut boot2 = [0u32; 256 / 4];
let ptrs = if use_boot2 {
rom_data::memcpy44(&mut boot2 as *mut _, 0x10000000 as *const _, 256);
rom_data::memcpy44(&mut boot2 as *mut _, super::FLASH_BASE as *const _, 256);
flash_function_pointers_with_boot2(true, false, &boot2)
} else {
flash_function_pointers(true, false)
};
core::sync::atomic::compiler_fence(core::sync::atomic::Ordering::SeqCst);
write_flash_inner(addr, len, None, &ptrs as *const FlashFunctionPointers);
}
@ -300,11 +314,14 @@ mod ram_helpers {
pub unsafe fn flash_range_erase_and_program(addr: u32, data: &[u8], use_boot2: bool) {
let mut boot2 = [0u32; 256 / 4];
let ptrs = if use_boot2 {
rom_data::memcpy44(&mut boot2 as *mut _, 0x10000000 as *const _, 256);
rom_data::memcpy44(&mut boot2 as *mut _, super::FLASH_BASE as *const _, 256);
flash_function_pointers_with_boot2(true, true, &boot2)
} else {
flash_function_pointers(true, true)
};
core::sync::atomic::compiler_fence(core::sync::atomic::Ordering::SeqCst);
write_flash_inner(
addr,
data.len() as u32,
@ -332,11 +349,14 @@ mod ram_helpers {
pub unsafe fn flash_range_program(addr: u32, data: &[u8], use_boot2: bool) {
let mut boot2 = [0u32; 256 / 4];
let ptrs = if use_boot2 {
rom_data::memcpy44(&mut boot2 as *mut _, 0x10000000 as *const _, 256);
rom_data::memcpy44(&mut boot2 as *mut _, super::FLASH_BASE as *const _, 256);
flash_function_pointers_with_boot2(false, true, &boot2)
} else {
flash_function_pointers(false, true)
};
core::sync::atomic::compiler_fence(core::sync::atomic::Ordering::SeqCst);
write_flash_inner(
addr,
data.len() as u32,

1
examples/rp/src/bin/flash.rs
View file

@ -18,7 +18,6 @@ async fn main(_spawner: Spawner) {
info!("Hello World!");
let mut flash = embassy_rp::flash::Flash::<_, FLASH_SIZE>::new(p.FLASH);
erase_write_sector(&mut flash, 0x00);
multiwrite_bytes(&mut flash, ERASE_SIZE as u32);