Differences

This shows you the differences between two versions of the page.

--- fpgapad [2025/01/22 17:25] – arisotura
+++ fpgapad [2025/03/19 22:59] (current) – arisotura
@@ Line 34: / Line 34: @@
 [[https://github.com/Arisotura/spi_flash|Flash emulator codebase]]
-The codebase is a bit of a mess. I had started adding support for write commands, but there are still issues with it as of now.
+The codebase is a bit of a mess.
@@ Line 69: / Line 69: @@
 Write data to SDRAM.
-This command takes 4 parameter bytes: 3 for the address (MSb's first), 1 for the length to read. Address and length are expressed in 8-byte chunks.
+This command takes 4 parameter bytes: 3 for the address (MSb's first), 1 for the length to write. Address and length are expressed in 8-byte chunks.
-After the parameter bytes are sent, data bytes should be sent to be written to memory.
+After the parameter bytes are sent, data bytes should be sent to be written to memory. A 0x01 byte is returned when the write has completed.
 **Debug output**
@@ Line 88: / Line 88: @@
 ^ Command ^ Description ^
-| 0x02    | Page program (experimental) |
+| 0x02    | Page program |
 | 0x03    | Read |
 | 0x04    | Write disable |
 | 0x05    | Read status (basic status bits supported) |
 | 0x06    | Write enable |
-| 0x20    | Subsector erase (experimental) |
+| 0x20    | Subsector erase |
 | 0x9E/0x9F | Read chip ID (fixed 20,BA,19,00,00,...) |
 | 0xB7    | Enter 4-byte address mode |
-| 0xD8    | Sector erase (experimental) |
+| 0xD8    | Sector erase |
 | 0xE9    | Leave 4-byte address mode |
 | 0xF2    | Debug |