chip erase timeout

[gcat000]

when i try to erase some 25q128, sometimes an error appears after a some minuts: chip erase timeout.

[msiqueira553]

when i try to erase some 25qxx, sometimes an error appears after a some minuts: chip erase timeout. I changed the timeout value in main.c (line 183) to 500 seconds, now I no longer get the error but the memory is not reset

[dronov]

It could be fixed with #21

[danielkucera]

It may also not. In my experience, some chips got locked by flash protection bits, see 10.1.3-10.1.6 in https://www.elinux.org/images/f/f5/Winbond-w25q32.pdf

I got it fixed by following code (it's commented now), I'll submit a proper patch when I experience it again (not sure if both commands are needed)

diff --git a/ch341a.c b/ch341a.c
index 8caeeab..66b41db 100644
--- a/ch341a.c
+++ b/ch341a.c
@@ -334,14 +334,25 @@ int32_t ch341WriteStatus(uint8_t status)
 /* chip erase */
 int32_t ch341EraseChip(void)
 {
-    uint8_t out[1];
-    uint8_t in[1];
+    uint8_t out[2];
+    uint8_t in[2];
     int32_t ret;
 
     if (devHandle == NULL) return -1;
     out[0] = 0x06; // Write enable
     ret = ch341SpiStream(out, in, 1);
     if (ret < 0) return ret;
+/*
+    out[0] = 0x01; // Set status register
+    out[1] = 0x00; // all to 0
+    ret = ch341SpiStream(out, in, 2);
+//    while (ch341ReadStatus() > 0){
+//     sleep(1);
+//    }
+    out[0] = 0x98; // Global block unlock
+    ret = ch341SpiStream(out, in, 1);
+    if (ret < 0) return ret;
+*/
     out[0] = 0xC7; // Chip erase
     ret = ch341SpiStream(out, in, 1);
     if (ret < 0) return ret;

@setarcos ,can you please reopen?