Changeset a6ae6ac in avrstuff for EPRoxygen/at29c040.cpp

Timestamp:

Jul 9, 2012, 11:05:43 PM (12 years ago)

Author:

Adrien Destugues <pulkomandy@…>

Branches:

main

Children:

16cf6ff

Parents:

34c57e8

Message:

Still not working...
Added very agressive timing, fixed some potential glitches, but still not enough to even read the device ID !

git-svn-id: ​svn://pulkomandy.tk/avrstuff@60 c6672c3c-f6b6-47f9-9001-1fd6b12fecbe

File:

• EPRoxygen/at29c040.cpp (modified) (6 diffs)

EPRoxygen/at29c040.cpp

@@ -14 +14 @@
         Device::write(CTRL, 0b10011111 | CTRLmask);
         Device::write(VOLT, 0b11001000 | VOLTmask);
+        outb(port + 2, NONE);
 }
 
@@ -20 +21 @@
         // All pins of the ROM are put either in high-Z, or 0V when it's not
         // possible
-        Device::write(CTRL, 0x62);
-        Device::write(VOLT, 0x7F);
+        Device::write(CTRL, 0b01100010);
+        Device::write(VOLT, 0b01111111);
         outb(port + 2, NONE);
 }
@@ -51 +52 @@
 {
         // Chip enable
-        Device::write(CTRL, CTRLmask | CE);
+        Device::write(CTRL, CTRLmask | WE | OE | CE | A17);
                 // Address bits low, WE = 1, CE = 0, OE = 1
                 // TC and TD = 1
@@ -60 +61 @@
 
         wr16(0x5555, 0xAA);
-        wr16(0x2AAA, 0x55);
+        wr16(0xAAAA, 0x55);
         wr16(0x5555, 0x90);
 
@@ -70 +71 @@
         // Read the result now
         Device::write(ADR0, 0x00);
-        Device::write(ADR1, 0x00);
-        Device::write(CTRL, WE | CE | CTRLmask);
+                        usleep(1000);
+        Device::write(ADR1, 0x00 ^ A13);
+                        usleep(1000);
+        Device::write(CTRL, WE | A17 | CTRLmask);
+                        usleep(1000);
         uint8_t manufacturer = Device::read();
 
-        getchar();
 
-        Device::write(CTRL, OE | WE | CE | CTRLmask);
+        Device::write(CTRL, CE | OE | WE | A17 | CTRLmask);
+                        usleep(1000);
         Device::write(ADR0, 0x01);
-        Device::write(CTRL, WE | CE | CTRLmask);
+                        usleep(1000);
+        Device::write(CTRL, WE | A17 | CTRLmask);
+                        usleep(1000);
 
         uint8_t product = Device::read();
 
+        Device::write(CTRL, CE | WE | OE | A17 | CTRLmask);
+                        usleep(1000);
         // re enable DOE, we are going to write again...
-        Device::write(CTRL, WE | OE | CE | CTRLmask);
         Device::write(VOLT, VOLTmask);
+                        usleep(1000);
 
         wr16(0x5555, 0xAA);
-        wr16(0x2AAA, 0x55);
+        wr16(0xAAAA, 0x55);
         wr16(0x5555, 0xF0);
         usleep(10000);
@@ -93 +101 @@
         // Chip disable - we're done !
         Device::write(CTRL, 0xFF | CTRLmask);
+                        usleep(1000);
         
         bool ok = (manufacturer == 0x1F && product == 0xA4);