-/** */
-static int stlink_configure_target_trace_port(void *handle)
-{
- int res;
- uint32_t reg;
- struct stlink_usb_handle_s *h = handle;
-
- assert(handle != NULL);
-
- /* configure the TPI */
-
- /* enable the trace subsystem */
- res = stlink_usb_v2_read_debug_reg(handle, DCB_DEMCR, ®);
- if (res != ERROR_OK)
- goto out;
- res = stlink_usb_write_debug_reg(handle, DCB_DEMCR, TRCENA|reg);
- if (res != ERROR_OK)
- goto out;
- /* set the TPI clock prescaler */
- res = stlink_usb_write_debug_reg(handle, TPI_ACPR, h->trace.prescale);
- if (res != ERROR_OK)
- goto out;
- /* select the pin protocol. The STLinkv2 only supports asynchronous
- * UART emulation (NRZ) mode, so that's what we pick. */
- res = stlink_usb_write_debug_reg(handle, TPI_SPPR, 0x02);
- if (res != ERROR_OK)
- goto out;
- /* disable continuous formatting */
- res = stlink_usb_write_debug_reg(handle, TPI_FFCR, (1<<8));
- if (res != ERROR_OK)
- goto out;
-
- /* configure the ITM */
-
- /* unlock access to the ITM registers */
- res = stlink_usb_write_debug_reg(handle, ITM_LAR, 0xC5ACCE55);
- if (res != ERROR_OK)
- goto out;
- /* enable trace with ATB ID 1 */
- res = stlink_usb_write_debug_reg(handle, ITM_TCR, (1<<16)|(1<<0)|(1<<2));
- if (res != ERROR_OK)
- goto out;
- /* trace privilege */
- res = stlink_usb_write_debug_reg(handle, ITM_TPR, 1);
- if (res != ERROR_OK)
- goto out;
- /* trace port enable (port 0) */
- res = stlink_usb_write_debug_reg(handle, ITM_TER, (1<<0));
- if (res != ERROR_OK)
- goto out;
-
- res = ERROR_OK;
-out:
- return res;
-}
-