Skip to content

Keep states of device GPIOs upon open #50

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
ovchinnikov-v-a wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Keep states of device GPIOs upon open #50

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
145 changes: 130 additions & 15 deletions src/mpsse.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -50,13 +50,30 @@ struct vid_pid supported_devices[] = {
* On failure, mpsse->open will be set to 0.
*/
struct mpsse_context *MPSSE(enum modes mode, int freq, int endianess)
{
return MPSSEEx(mode, freq, endianess, 1);
}

/*
* Opens and initializes the first FTDI device found.
*
* @mode - Mode to open the device in. One of enum modes.
* @freq - Clock frequency to use for the specified mode.
* @endianess - Specifies how data is clocked in/out (MSB, LSB).
* @reset_gpios - Whether reset (!= 0) GPIOs to the default state or not (== 0).
*
* Returns a pointer to an MPSSE context structure.
* On success, mpsse->open will be set to 1.
* On failure, mpsse->open will be set to 0.
*/
struct mpsse_context *MPSSEEx(enum modes mode, int freq, int endianess, int reset_gpios)
{
int i = 0;
struct mpsse_context *mpsse = NULL;

for(i=0; supported_devices[i].vid != 0; i++)
{
if((mpsse = Open(supported_devices[i].vid, supported_devices[i].pid, mode, freq, endianess, IFACE_A, NULL, NULL)) != NULL)
if((mpsse = OpenEx(supported_devices[i].vid, supported_devices[i].pid, mode, freq, endianess, IFACE_A, NULL, NULL, reset_gpios)) != NULL)
{
if(mpsse->open)
{
Expand Down Expand Up @@ -93,7 +110,29 @@ struct mpsse_context *MPSSE(enum modes mode, int freq, int endianess)
*/
struct mpsse_context *Open(int vid, int pid, enum modes mode, int freq, int endianess, int interface, const char *description, const char *serial)
{
return OpenIndex(vid, pid, mode, freq, endianess, interface, description, serial, 0);
return OpenEx(vid, pid, mode, freq, endianess, interface, description, serial, 1);
}

/*
* Open device by VID/PID
*
* @vid - Device vendor ID.
* @pid - Device product ID.
* @mode - MPSSE mode, one of enum modes.
* @freq - Clock frequency to use for the specified mode.
* @endianess - Specifies how data is clocked in/out (MSB, LSB).
* @interface - FTDI interface to use (IFACE_A - IFACE_D).
* @description - Device product description (set to NULL if not needed).
* @serial - Device serial number (set to NULL if not needed).
* @reset_gpios - Whether reset (!= 0) GPIOs to the default state or not (== 0).
*
* Returns a pointer to an MPSSE context structure.
* On success, mpsse->open will be set to 1.
* On failure, mpsse->open will be set to 0.
*/
struct mpsse_context *OpenEx(int vid, int pid, enum modes mode, int freq, int endianess, int interface, const char *description, const char *serial, int reset_gpios)
{
return OpenIndexEx(vid, pid, mode, freq, endianess, interface, description, serial, 0, reset_gpios);
}

/*
Expand All @@ -114,6 +153,29 @@ struct mpsse_context *Open(int vid, int pid, enum modes mode, int freq, int endi
* On failure, mpsse->open will be set to 0.
*/
struct mpsse_context *OpenIndex(int vid, int pid, enum modes mode, int freq, int endianess, int interface, const char *description, const char *serial, int index)
{
return OpenIndexEx(vid, pid, mode, freq, endianess, interface, description, serial, index, 1);
}

/*
* Open device by VID/PID/index
*
* @vid - Device vendor ID.
* @pid - Device product ID.
* @mode - MPSSE mode, one of enum modes.
* @freq - Clock frequency to use for the specified mode.
* @endianess - Specifies how data is clocked in/out (MSB, LSB).
* @interface - FTDI interface to use (IFACE_A - IFACE_D).
* @description - Device product description (set to NULL if not needed).
* @serial - Device serial number (set to NULL if not needed).
* @index - Device index (set to 0 if not needed).
* @reset_gpios - Whether reset (!= 0) GPIOs to the default state or not (== 0).
*
* Returns a pointer to an MPSSE context structure.
* On success, mpsse->open will be set to 1.
* On failure, mpsse->open will be set to 0.
*/
struct mpsse_context *OpenIndexEx(int vid, int pid, enum modes mode, int freq, int endianess, int interface, const char *description, const char *serial, int index, int reset_gpios)
{
int status = 0;
struct mpsse_context *mpsse = NULL;
Expand Down Expand Up @@ -155,7 +217,10 @@ struct mpsse_context *OpenIndex(int vid, int pid, enum modes mode, int freq, int
status |= ftdi_set_latency_timer(&mpsse->ftdi, LATENCY_MS);
status |= ftdi_write_data_set_chunksize(&mpsse->ftdi, CHUNK_SIZE);
status |= ftdi_read_data_set_chunksize(&mpsse->ftdi, CHUNK_SIZE);
status |= ftdi_set_bitmode(&mpsse->ftdi, 0, BITMODE_RESET);
if(reset_gpios != 0)
{
status |= ftdi_set_bitmode(&mpsse->ftdi, 0, BITMODE_RESET);
}

if(status == 0)
{
Expand All @@ -168,7 +233,7 @@ struct mpsse_context *OpenIndex(int vid, int pid, enum modes mode, int freq, int

if(SetClock(mpsse, freq) == MPSSE_OK)
{
if(SetMode(mpsse, endianess) == MPSSE_OK)
if(SetModeEx(mpsse, endianess, reset_gpios) == MPSSE_OK)
{
mpsse->open = 1;

Expand Down Expand Up @@ -259,6 +324,22 @@ void EnableBitmode(struct mpsse_context *mpsse, int tf)
*/
int SetMode(struct mpsse_context *mpsse, int endianess)
{
return SetModeEx(mpsse, endianess, 1);
}

/*
* Sets the appropriate transmit and receive commands based on the requested mode and byte order.
*
* @mpsse - MPSSE context pointer.
* @endianess - MPSSE_MSB or MPSSE_LSB.
* @reset_gpios - Whether reset (!= 0) GPIOs to the default state or not (== 0).
*
* Returns MPSSE_OK on success.
* Returns MPSSE_FAIL on failure.
*/
int SetModeEx(struct mpsse_context *mpsse, int endianess, int reset_gpios)
{
unsigned char get_bits_command;
int retval = MPSSE_OK, i = 0, setup_commands_size = 0;
unsigned char buf[CMD_SIZE] = { 0 };
unsigned char setup_commands[CMD_SIZE*MAX_SETUP_COMMANDS] = { 0 };
Expand All @@ -274,8 +355,25 @@ int SetMode(struct mpsse_context *mpsse, int endianess)
/* Clock, data out, chip select pins are outputs; all others are inputs. */
mpsse->tris = DEFAULT_TRIS;

/* Clock and chip select pins idle high; all others are low */
mpsse->pidle = mpsse->pstart = mpsse->pstop = DEFAULT_PORT;
if(reset_gpios == 0)
{
get_bits_command = GET_BITS_LOW;
retval = raw_write(mpsse, &get_bits_command, 1);
if(retval == MPSSE_OK)
{
if(raw_read(mpsse, &mpsse->pidle, 1) != 1)
{
retval = MPSSE_FAIL;
}
}
}
else
{
mpsse->pidle = 0;
}
/* Clock and chip select pins idle high */
mpsse->pidle = mpsse->pstart = mpsse->pstop = DEFAULT_PORT
| (mpsse->pidle & (GPIO0 | GPIO1 | GPIO2 | GPIO3));

/* During reads and writes the chip select pin is brought low */
mpsse->pstart &= ~CS;
Expand Down Expand Up @@ -370,16 +468,33 @@ int SetMode(struct mpsse_context *mpsse, int endianess)
{
/* Set the idle pin states */
set_bits_low(mpsse, mpsse->pidle);
/* All GPIO pins are outputs, set low */

/* All GPIOH pins are outputs */
mpsse->trish = 0xFF;
mpsse->gpioh = 0x00;

buf[i++] = SET_BITS_HIGH;
buf[i++] = mpsse->gpioh;
buf[i++] = mpsse->trish;

retval = raw_write(mpsse, buf, i);

if(reset_gpios == 0)
{
get_bits_command = GET_BITS_HIGH;
retval = raw_write(mpsse, &get_bits_command, 1);
if(retval == MPSSE_OK)
{
if(raw_read(mpsse, &mpsse->gpioh, 1) != 1)
{
retval = MPSSE_FAIL;
}
}
}
else
{
/* Set all GPIOH pins low */
mpsse->gpioh = 0x00;

buf[i++] = SET_BITS_HIGH;
buf[i++] = mpsse->gpioh;
buf[i++] = mpsse->trish;

retval = raw_write(mpsse, buf, i);
}
}
}
else
Expand Down
4 changes: 4 additions & 0 deletions src/mpsse.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -173,11 +173,15 @@ struct mpsse_context
};

struct mpsse_context *MPSSE(enum modes mode, int freq, int endianess);
struct mpsse_context *MPSSEEx(enum modes mode, int freq, int endianess, int reset_gpios);
struct mpsse_context *Open(int vid, int pid, enum modes mode, int freq, int endianess, int interface, const char *description, const char *serial);
struct mpsse_context *OpenEx(int vid, int pid, enum modes mode, int freq, int endianess, int interface, const char *description, const char *serial, int reset_gpios);
struct mpsse_context *OpenIndex(int vid, int pid, enum modes mode, int freq, int endianess, int interface, const char *description, const char *serial, int index);
struct mpsse_context *OpenIndexEx(int vid, int pid, enum modes mode, int freq, int endianess, int interface, const char *description, const char *serial, int index, int reset_gpios);
void Close(struct mpsse_context *mpsse);
const char *ErrorString(struct mpsse_context *mpsse);
int SetMode(struct mpsse_context *mpsse, int endianess);
int SetModeEx(struct mpsse_context *mpsse, int endianess, int reset_gpios);
void EnableBitmode(struct mpsse_context *mpsse, int tf);
int SetClock(struct mpsse_context *mpsse, uint32_t freq);
int GetClock(struct mpsse_context *mpsse);
Expand Down