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libftdi: Infrastructure to test for target voltage present.

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This commit is contained in:
Uwe Bonnes 2019-09-05 15:49:26 +02:00 committed by UweBonnes
parent aff624b6e0
commit c78066255d
2 changed files with 21 additions and 0 deletions
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17
src/platforms/hosted/ftdi_bmp.c
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@ -123,6 +123,8 @@ cable_desc_t cable_desc[] = {
.mpsse_swd_write.set_data_low = PIN5, .mpsse_swd_write.set_data_low = PIN5,
.mpsse_swd_write.clr_data_low = PIN6, .mpsse_swd_write.clr_data_low = PIN6,
.jtag.set_data_low = PIN6, .jtag.set_data_low = PIN6,
.target_voltage_cmd = GET_BITS_HIGH,
.target_voltage_pin = ~PIN2,
.name = "ftdiswd" .name = "ftdiswd"
}, },
{ {
@ -519,5 +521,20 @@ void libftdi_jtagtap_tdi_tdo_seq(
const char *libftdi_target_voltage(void) const char *libftdi_target_voltage(void)
{ {
uint8_t pin = active_cable->target_voltage_pin;
if (active_cable->target_voltage_cmd && pin) {
libftdi_buffer_write(&active_cable->target_voltage_cmd, 1);
uint8_t data[1];
libftdi_buffer_read(data, 1);
bool res = false;
if (((pin < 0x7f) || (pin == PIN7)))
res = data[0] & pin;
else
res = !(data[0] & ~pin);
if (res)
return "Present";
else
return "Absent";
}
return "not supported"; return "not supported";
} }

4
src/platforms/hosted/ftdi_bmp.h
View File

@ -88,6 +88,10 @@ typedef struct cable_desc_s {
pin_settings_t mpsse_swd_write; pin_settings_t mpsse_swd_write;
/* dbus data for jtag.*/ /* dbus data for jtag.*/
pin_settings_t jtag; pin_settings_t jtag;
/* Command to read port to check target voltage.*/
uint8_t target_voltage_cmd;
/* Pin to check target voltage.*/
uint8_t target_voltage_pin;
/* USB readable description of the device.*/ /* USB readable description of the device.*/
char *description; char *description;
/* Command line argument to -c option to select this device.*/ /* Command line argument to -c option to select this device.*/