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Nikolay Shadrin whoney at gmail.com, Zach Welch <zw@superlucidity.net> unstable USB J-Link in OpenOCD (revised patch provided) 

git-svn-id: svn://svn.berlios.de/openocd/trunk@1475 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
oharboe 2009-04-19 23:30:15 +00:00
parent d1ab0a9698
commit c401b8dd4f
1 changed files with 59 additions and 11 deletions
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70
src/jtag/jlink.c
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@ -115,7 +115,7 @@ jlink_jtag_t *jlink_usb_open(void);
void jlink_usb_close(jlink_jtag_t *jlink_jtag);
int jlink_usb_message(jlink_jtag_t *jlink_jtag, int out_length, int in_length);
int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length);
int jlink_usb_read(jlink_jtag_t *jlink_jtag);
int jlink_usb_read(jlink_jtag_t *jlink_jtag, int expected_size);
int jlink_usb_read_emu_result(jlink_jtag_t *jlink_jtag);
/* helper functions */
@ -497,7 +497,7 @@ int jlink_get_status(void)
int result;
jlink_simple_command(EMU_CMD_GET_STATE);
result = jlink_usb_read(jlink_jtag_handle);
result = jlink_usb_read(jlink_jtag_handle, 8);
if (result == 8)
{
@ -527,12 +527,12 @@ int jlink_get_version_info(void)
/* query hardware version */
jlink_simple_command(EMU_CMD_VERSION);
result = jlink_usb_read(jlink_jtag_handle);
result = jlink_usb_read(jlink_jtag_handle, 2);
if (result == 2)
{
len = buf_get_u32(usb_in_buffer, 0, 16);
result = jlink_usb_read(jlink_jtag_handle);
result = jlink_usb_read(jlink_jtag_handle, len);
if (result == len)
{
@ -806,7 +806,7 @@ int jlink_usb_message(jlink_jtag_t *jlink_jtag, int out_length, int in_length)
result = jlink_usb_write(jlink_jtag, out_length);
if (result == out_length)
{
result = jlink_usb_read(jlink_jtag);
result = jlink_usb_read(jlink_jtag, in_length);
if (result == in_length || result == in_length+1)
{
if (result == in_length)
@ -859,6 +859,54 @@ int jlink_usb_message(jlink_jtag_t *jlink_jtag, int out_length, int in_length)
}
}
int usb_bulk_write_ex(usb_dev_handle *dev, int ep, char *bytes, int size,
int timeout) {
int rc = 0, tries = 3, this_size;
while (tries && size) {
this_size = usb_bulk_write (dev, ep, bytes, size, timeout);
if (this_size > 0) {
size -= this_size;
rc += this_size;
bytes += this_size;
} else
tries --;
}
return rc;
}
int usb_bulk_read_ex(usb_dev_handle *dev, int ep, char *bytes, int size,
int timeout) {
int rc = 0, tries = 3, this_size;
while (tries && size) {
this_size = usb_bulk_read (dev, ep, bytes, size, timeout);
if (this_size > 0) {
size -= this_size;
rc += this_size;
bytes += this_size;
} else
tries --;
}
return rc;
}
/* Write data from out_buffer to USB. */
int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length)
{
@ -870,7 +918,7 @@ int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length)
return -1;
}
result = usb_bulk_write(jlink_jtag->usb_handle, JLINK_WRITE_ENDPOINT,
result = usb_bulk_write_ex(jlink_jtag->usb_handle, JLINK_WRITE_ENDPOINT,
(char *)usb_out_buffer, out_length, JLINK_USB_TIMEOUT);
DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d", out_length, result);
@ -882,10 +930,10 @@ int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length)
}
/* Read data from USB into in_buffer. */
int jlink_usb_read(jlink_jtag_t *jlink_jtag)
int jlink_usb_read(jlink_jtag_t *jlink_jtag, int expected_size)
{
int result = usb_bulk_read(jlink_jtag->usb_handle, JLINK_READ_ENDPOINT,
(char *)usb_in_buffer, JLINK_IN_BUFFER_SIZE, JLINK_USB_TIMEOUT);
int result = usb_bulk_read_ex(jlink_jtag->usb_handle, JLINK_READ_ENDPOINT,
(char *)usb_in_buffer, expected_size, JLINK_USB_TIMEOUT);
DEBUG_JTAG_IO("jlink_usb_read, result = %d", result);
@ -898,8 +946,8 @@ int jlink_usb_read(jlink_jtag_t *jlink_jtag)
/* Read the result from the previous EMU cmd into result_buffer. */
int jlink_usb_read_emu_result(jlink_jtag_t *jlink_jtag)
{
int result = usb_bulk_read(jlink_jtag->usb_handle, JLINK_READ_ENDPOINT,
(char *)usb_emu_result_buffer, JLINK_EMU_RESULT_BUFFER_SIZE,
int result = usb_bulk_read_ex(jlink_jtag->usb_handle, JLINK_READ_ENDPOINT,
(char *)usb_emu_result_buffer, 1 /* JLINK_EMU_RESULT_BUFFER_SIZE */,
JLINK_USB_TIMEOUT);
DEBUG_JTAG_IO("jlink_usb_read_result, result = %d", result);