Hi there, this is a WIP patch for ftdi_eeprom that adds support for drive,
slew and schmitt settings for both ADBUS and ACBUS on the ft232h (currently
only group0_drive exists). I also changed the offset used for the group1
settings in ftdi.c: The eeprom (with stock configuration) of my um232h seems
to have the same memory map used in the 2232h and 4232h for these settings.
The factory defaults are:
group0_drive=8MA
group0_slew=false
group0_schmitt=false
group1_drive=8MA
group1_slew=false
group1_schmitt=false
Two things I still couldn't figure out:
- Why when I run ftdi_eeprom build-eeprom eeprom->chip is 0 instead 0x56
- In my um232h the content of 0x8A is 0x48/"H", I couldn't find what is
this for, any ideas?
Sorry for the messy e-mail, I'm tired, hope it makes sense. Cheers!
Signed-off-by: Brian Gomes Bascoy (pera) <brian@xxxxxxxxxxxxx>
---
ftdi_eeprom/main.c | 32 ++++++++++++++++++++++++++++++++
src/ftdi.c | 10 +++++-----
2 files changed, 37 insertions(+), 5 deletions(-)
diff --git a/ftdi_eeprom/main.c b/ftdi_eeprom/main.c
index e3a09ba..fc427db 100644
--- a/ftdi_eeprom/main.c
+++ b/ftdi_eeprom/main.c
@@ -87,6 +87,27 @@ static int parse_group0_drive(cfg_t *cfg, cfg_opt_t *opt,
const char *value, voi
return -1;
}
+static int parse_group1_drive(cfg_t *cfg, cfg_opt_t *opt, const char *value,
void *result)
+{
+ static const char* options[] =
+ {
+ "4MA", "8MA", "12MA", "16MA"
+ };
+
+ int i;
+ for (i=0; i<sizeof(options)/sizeof(*options); i++)
+ {
+ if (!(strcasecmp(options[i], value)))
+ {
+ *(int *)result = i;
+ return 0;
+ }
+ }
+
+ cfg_error(cfg, "Invalid %s option '%s'", cfg_opt_name(opt), value);
+ return -1;
+}
+
static int parse_cbush(cfg_t *cfg, cfg_opt_t *opt, const char *value, void
*result)
{
static const char* options[] =
@@ -261,6 +282,11 @@ int main(int argc, char *argv[])
CFG_INT_CB("cbusx2", -1, 0, parse_cbusx),
CFG_INT_CB("cbusx3", -1, 0, parse_cbusx),
CFG_INT_CB("group0_drive", -1, 0, parse_group0_drive),
+ CFG_BOOL("group0_slew", cfg_false, 0),
+ CFG_BOOL("group0_schmitt", cfg_false, 0),
+ CFG_INT_CB("group1_drive", -1, 0, parse_group1_drive),
+ CFG_BOOL("group1_slew", cfg_false, 0),
+ CFG_BOOL("group1_schmitt", cfg_false, 0),
CFG_BOOL("invert_txd", cfg_false, 0),
CFG_BOOL("invert_rxd", cfg_false, 0),
CFG_BOOL("invert_rts", cfg_false, 0),
@@ -516,6 +542,12 @@ int main(int argc, char *argv[])
eeprom_set_value(ftdi, CBUS_FUNCTION_9, cfg_getint(cfg, "cbush9"));
if (cfg_getint(cfg, "group0_drive") != -1)
eeprom_set_value(ftdi, GROUP0_DRIVE, cfg_getint(cfg,
"group0_drive"));
+ eeprom_set_value(ftdi, GROUP0_SLEW, cfg_getbool(cfg, "group0_slew"));
+ eeprom_set_value(ftdi, GROUP0_SCHMITT, cfg_getbool(cfg,
"group0_schmitt"));
+ if (cfg_getint(cfg, "group1_drive") != -1)
+ eeprom_set_value(ftdi, GROUP1_DRIVE, cfg_getint(cfg,
"group1_drive"));
+ eeprom_set_value(ftdi, GROUP1_SLEW, cfg_getbool(cfg, "group1_slew"));
+ eeprom_set_value(ftdi, GROUP1_SCHMITT, cfg_getbool(cfg,
"group1_schmitt"));
}
else if (ftdi->type == TYPE_230X)
{
diff --git a/src/ftdi.c b/src/ftdi.c
index 0a7fb27..4875c73 100644
--- a/src/ftdi.c
+++ b/src/ftdi.c
@@ -3424,17 +3424,17 @@ int ftdi_eeprom_build(struct ftdi_context *ftdi)
output[0x0c] |= SLOW_SLEW;
if (eeprom->group1_drive > DRIVE_16MA)
- output[0x0d] |= DRIVE_16MA;
+ output[0x0c] |= DRIVE_16MA<<4;
else
- output[0x0d] |= eeprom->group1_drive;
+ output[0x0c] |= eeprom->group1_drive<<4;
if (eeprom->group1_schmitt)
- output[0x0d] |= IS_SCHMITT;
+ output[0x0c] |= IS_SCHMITT<<4;
if (eeprom->group1_slew)
- output[0x0d] |= SLOW_SLEW;
+ output[0x0c] |= SLOW_SLEW<<4;
set_ft232h_cbus(eeprom, output);
- output[0x1e] = eeprom->chip;
+ output[0x1e] = 0x56;//??? eeprom->chip;
/* FIXME: Build FT232H specific EEPROM settings */
break;
case TYPE_230X:
--
2.35.1
--
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