ftdi_eeprom_build needs to know EEPROM chip type

[libftdi] / src / ftdi.c

diff --git a/src/ftdi.c b/src/ftdi.c
index c3d5fd8..65a626f 100644 (file)
--- a/src/ftdi.c
+++ b/src/ftdi.c
@@ -2261,6 +2261,7 @@ void ftdi_eeprom_free(struct ftdi_context *ftdi)
     \retval -3: Invalid cbus function setting
     \retval -4: Chip doesn't support invert
     \retval -5: Chip doesn't support high current drive
+    \retval -6: No connected EEPROM or EEPROM Type unknown
 */
 int ftdi_eeprom_build(struct ftdi_context *ftdi, unsigned char *output)
 {
@@ -2278,6 +2279,9 @@ int ftdi_eeprom_build(struct ftdi_context *ftdi, unsigned char *output)
 
     eeprom= ftdi->eeprom;
 
+    if(eeprom->chip == -1)
+        ftdi_error_return(-5,"No connected EEPROM or EEPROM Type unknown");
+
     if (eeprom->manufacturer != NULL)
         manufacturer_size = strlen(eeprom->manufacturer);
     if (eeprom->product != NULL)