static int stlink_usb_read_mem8(void *handle, uint32_t addr, uint16_t len,
uint8_t *buffer)
{
int res;
uint16_t read_len = len;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, read_len);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READMEM_8BIT;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
h_u16_to_le(h->cmdbuf+h->cmdidx, len);
h->cmdidx += 2;
/* we need to fix read length for single bytes */
if (read_len == 1)
read_len++;
res = stlink_usb_xfer(handle, h->databuf, read_len);
if (res != ERROR_OK)
return res;
memcpy(buffer, h->databuf, len);
return stlink_usb_get_rw_status(handle);
}
static int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len,
const uint8_t *buffer)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
len *= 4;
stlink_usb_init_buffer(handle, STLINK_TX_EP, len);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_WRITEMEM_32BIT;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
h_u16_to_le(h->cmdbuf+h->cmdidx, len);
h->cmdidx += 2;
res = stlink_usb_xfer(handle, buffer, len);
if (res != ERROR_OK)
return res;
return stlink_usb_get_rw_status(handle);
}
static int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len,
const uint8_t *buffer)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
/* data must be a multiple of 4 and word aligned */
if (len % 4 || addr % 4) {
LOG_DEBUG("Invalid data alignment");
return ERROR_TARGET_UNALIGNED_ACCESS;
}
stlink_usb_init_buffer(handle, h->tx_ep, len);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_WRITEMEM_32BIT;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
h_u16_to_le(h->cmdbuf+h->cmdidx, len);
h->cmdidx += 2;
res = stlink_usb_xfer(handle, buffer, len);
if (res != ERROR_OK)
return res;
return stlink_usb_get_rw_status(handle);
}
static int stlink_usb_write_mem8(void *handle, uint32_t addr, uint16_t len,
const uint8_t *buffer)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
/* max 8bit read/write is 64bytes */
if (len > STLINK_MAX_RW8) {
LOG_DEBUG("max buffer length exceeded");
return ERROR_FAIL;
}
stlink_usb_init_buffer(handle, h->tx_ep, len);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_WRITEMEM_8BIT;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
h_u16_to_le(h->cmdbuf+h->cmdidx, len);
h->cmdidx += 2;
res = stlink_usb_xfer(handle, buffer, len);
if (res != ERROR_OK)
return res;
return stlink_usb_get_rw_status(handle);
}
static int stlink_usb_trace_enable(void *handle)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
if (h->version.jtag >= STLINK_TRACE_MIN_VERSION) {
uint32_t trace_hz;
res = stlink_configure_target_trace_port(handle);
if (res != ERROR_OK)
LOG_ERROR("Unable to configure tracing on target\n");
trace_hz = h->trace.prescale > 0 ?
h->trace.source_hz / (h->trace.prescale + 1) :
h->trace.source_hz;
stlink_usb_init_buffer(handle, h->rx_ep, 10);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_START_TRACE_RX;
h_u16_to_le(h->cmdbuf+h->cmdidx, (uint16_t)STLINK_TRACE_SIZE);
h->cmdidx += 2;
h_u32_to_le(h->cmdbuf+h->cmdidx, trace_hz);
h->cmdidx += 4;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res == ERROR_OK) {
h->trace.enabled = true;
LOG_DEBUG("Tracing: recording at %" PRIu32 "Hz\n", trace_hz);
/* We need the trace read function to be called at a
* high-enough frequency to ensure reasonable
* "timeliness" in processing ITM/DWT data.
* TODO: An alternative could be using the asynchronous
* features of the libusb-1.0 API to queue up one or more
* reads in advance and requeue them once they are
* completed. */
target_register_timer_callback(stlink_usb_trace_read_callback, 1, 1, handle);
}
} else {
LOG_ERROR("Tracing is not supported by this version.");
res = ERROR_FAIL;
}
return res;
}
static int stlink_usb_read_mem8(void *handle, uint32_t addr, uint16_t len,
uint8_t *buffer)
{
int res;
uint16_t read_len = len;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
/* max 8bit read/write is 64bytes */
if (len > STLINK_MAX_RW8) {
LOG_DEBUG("max buffer length exceeded");
return ERROR_FAIL;
}
stlink_usb_init_buffer(handle, h->rx_ep, read_len);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READMEM_8BIT;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
h_u16_to_le(h->cmdbuf+h->cmdidx, len);
h->cmdidx += 2;
/* we need to fix read length for single bytes */
if (read_len == 1)
read_len++;
res = stlink_usb_xfer(handle, h->databuf, read_len);
if (res != ERROR_OK)
return res;
memcpy(buffer, h->databuf, len);
return stlink_usb_get_rw_status(handle);
}
/* read JTAG buffer into little-endian u16 */
int arm_jtag_buf_to_le16(u8 *in_buf, void *priv, struct scan_field_s *field)
{
h_u16_to_le(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
return ERROR_OK;
}
