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esp_usb_jtag: added support for https://github.com/espressif/esp-usb-bridge + small adjusts

This commit is contained in:
Gwenhael Goavec-Merou 2025-08-25 09:38:00 +02:00
parent c818641cae
commit 2580aed994
2 changed files with 38 additions and 12 deletions
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46
src/esp_usb_jtag.cpp
View File

@ -5,6 +5,8 @@
/* To prepare the cable see:
* https://github.com/emard/esp32s3-jtag
* or
* https://github.com/espressif/esp-usb-bridge
*/
/*
@ -117,7 +119,7 @@ using namespace std;
#define ESPUSBJTAG_PID 0x1001
#define ESPUSBJTAG_INTF 2
#define ESPUSBJTAG_WRITE_EP 0x02
//#define ESPUSBJTAG_WRITE_EP 0x02
#define ESPUSBJTAG_READ_EP 0x83
#define ESPUSBJTAG_TIMEOUT_MS 1000
@ -240,17 +242,19 @@ struct esp_usb_jtag_s {
static struct esp_usb_jtag_s esp_usb_jtag_priv;
static struct esp_usb_jtag_s *priv = &esp_usb_jtag_priv;
static uint16_t esp_usb_jtag_caps = 0x2000; /* capabilites descriptor ID, different esp32 chip may need different value */
static uint16_t esp_usb_target_chip_id = 0; /* not applicable for FPGA, they have chip id 32-bit wide */
/* end copy from openocd */
esp_usb_jtag::esp_usb_jtag(uint32_t clkHZ, int8_t verbose, int vid = ESPUSBJTAG_VID, int pid = ESPUSBJTAG_PID):
_verbose(verbose > 1),
dev_handle(NULL), usb_ctx(NULL), _tdi(0), _tms(0)
dev_handle(NULL), usb_ctx(NULL), _tdi(0), _tms(0),
/* Default for emard firmware. */
_esp_usb_jtag_caps(0x2000), _write_ep(0x02),
_vid(ESPUSBJTAG_VID), _pid(ESPUSBJTAG_PID)
{
int ret;
char mess[256];
if (libusb_init(&usb_ctx) < 0) {
cerr << "libusb init failed" << endl;
@ -258,13 +262,24 @@ esp_usb_jtag::esp_usb_jtag(uint32_t clkHZ, int8_t verbose, int vid = ESPUSBJTAG_
}
dev_handle = libusb_open_device_with_vid_pid(usb_ctx,
ESPUSBJTAG_VID, ESPUSBJTAG_PID);
_vid, _pid);
if (!dev_handle) {
cerr << "fails to open esp_usb_jtag device vid:pid 0x" << std::hex << vid << ":0x" << std::hex << endl;
_esp_usb_jtag_caps = 0x030A;
_write_ep = 0x03;
_pid = 0x1002;
dev_handle = libusb_open_device_with_vid_pid(usb_ctx,
_vid, _pid);
}
if (!dev_handle) {
snprintf(mess, 256, "fails to open esp_usb_jtag device");
printError(mess);
libusb_exit(usb_ctx);
throw std::exception();
}
snprintf(mess, 256, "Open Success with vid: 0x%04x pid 0x%04x", _vid, _pid);
printSuccess(mess);
ret = libusb_claim_interface(dev_handle, ESPUSBJTAG_INTF);
if (ret) {
cerr << "libusb error while claiming esp_usb_jtag interface of device vid:pid 0x" << std::hex << vid << ":0x" << std::hex << pid << endl;
@ -301,15 +316,20 @@ bool esp_usb_jtag::getVersion()
int jtag_caps_read_len = libusb_control_transfer(dev_handle,
/*type*/ LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_STANDARD | LIBUSB_RECIPIENT_DEVICE,
/*brequest*/ LIBUSB_REQUEST_GET_DESCRIPTOR,
/*wvalue*/ esp_usb_jtag_caps,
/*wvalue*/ _esp_usb_jtag_caps,
/*interface*/ 0,
/*data*/ (unsigned char *)jtag_caps_desc,
/*length*/ JTAG_PROTO_CAPS_DATA_LEN,
/*timeout ms*/ ESPUSBJTAG_TIMEOUT_MS);
if (jtag_caps_read_len <= 0) {
cerr << "esp_usb_jtag: could not retrieve jtag_caps descriptor! len=" << jtag_caps_read_len << endl;
// goto out;
char mess[256];
snprintf(mess, 256, "esp_usb_jtag: could not retrieve jtag_caps descriptor! len=%d Error: %s\n",
jtag_caps_read_len, libusb_error_name(jtag_caps_read_len));
printError(mess);
return false;
}
for(int i = 0; i < jtag_caps_read_len; i++)
cerr << " 0x" << std::hex << (int)(jtag_caps_desc[i]);
cerr << endl;
@ -318,7 +338,7 @@ bool esp_usb_jtag::getVersion()
_div_min = 1;
_div_max = 1;
int p = esp_usb_jtag_caps ==
int p = _esp_usb_jtag_caps ==
VEND_DESCR_BUILTIN_JTAG_CAPS ? JTAG_BUILTIN_DESCR_START_OFF : JTAG_EUB_DESCR_START_OFF;
if (p + sizeof(struct jtag_proto_caps_hdr) > (unsigned int)jtag_caps_read_len) {
@ -391,7 +411,9 @@ int esp_usb_jtag::setClkFreq(uint32_t clkHZ)
uint32_t base_speed_Hz = _base_speed_khz * 1000; // TODO read base speed from caps
if (clkHZ > base_speed_Hz) {
printWarn("esp_usb_jtag probe limited to %d kHz", _base_speed_khz);
char mess[256];
snprintf(mess, 256, "esp_usb_jtag probe limited to %d kHz", _base_speed_khz);
printWarn(mess);
clkHZ = base_speed_Hz;
}
@ -603,7 +625,7 @@ int esp_usb_jtag::xfer(const uint8_t *tx, uint8_t *rx, const uint16_t length,
is_read ? "True" : "False", is_write ? "True" : "False", length);
printInfo(mess);
}
const unsigned char endpoint = (is_write) ? ESPUSBJTAG_WRITE_EP : ESPUSBJTAG_READ_EP;
const unsigned char endpoint = (is_write) ? _write_ep : ESPUSBJTAG_READ_EP;
uint8_t *data = (is_write) ? (uint8_t *)tx : rx;
if (is_write && _verbose) {
printf("xfer: write: ");

4
src/esp_usb_jtag.hpp
View File

@ -66,5 +66,9 @@ class esp_usb_jtag : public JtagInterface {
uint8_t _version;
uint32_t _base_speed_khz;
uint8_t _div_min, _div_max;
uint16_t _esp_usb_jtag_caps; /* capabilites descriptor ID, different esp32 chip may need different value */
uint32_t _write_ep; /* ESP32 Write endpoint */
int _vid;
int _pid;
};
#endif // SRC_ESPUSBJTAG_HPP_