--- a/target-utils/calversion/dsp_bringup.c	Sat May 25 20:44:05 2019 +0000
+++ b/target-utils/calversion/dsp_bringup.c	Sat May 25 21:30:23 2019 +0000
@@ -153,8 +153,13 @@
       // register is in reset state: HOM mode, PLL off, Bridge off. No ws
       // are applied for MCU<-->API access !!!!! So, MCU must wait for
       // end of Leadboot execution before accessing API.
-      //wait_ARM_cycles(convert_nanosec_to_cycles(10000));  // wait 10us
-      osmo_delay_ms(10);
+      /*
+       * TI's firmware code waits 10 us, but we'll give it a more generous
+       * 1 ms because our clocking setup is a little different, coming from
+       * the boot ROM: on platforms with 13 MHz CLKTCXO the DSP will run
+       * at the same frequency as the ARM, rather than the typical double.
+       */
+      wait_ARM_cycles(13000);
 
       // NO DOWNLOAD...
       {
@@ -216,7 +221,8 @@
     *(volatile UWORD16 *) DOWNLOAD_ADDR   = dsp_start_address; // Start address.
     *(volatile UWORD16 *) DOWNLOAD_STATUS = BLOCK_READY;       // Start DSP...
 
-    osmo_delay_ms(50);
+    /* give it a very generous 50 ms wait */
+    wait_ARM_cycles(13000 * 50);
     printf("DSP reports version 0x%04X 0x%04X\n",
            dsp_ndb_ptr->d_version_number1, dsp_ndb_ptr->d_version_number2);
 }