Changes between Version 1 and Version 2 of Debugging/OpenOCD/Raspberry_Pi


Ignore:
Timestamp:
Jun 15, 2016, 3:10:02 PM (3 years ago)
Author:
Pavel Pisa
Comment:

Rung RPi OpenOCD debug without setup of pins in u-boot.

Legend:

Unmodified
Added
Removed
Modified
  • Debugging/OpenOCD/Raspberry_Pi

    v1 v2  
    1717mw.l 0x20200008 0x65b6c0
    1818}}}
     19or apply next change to RTEMS sources
     20{{{
     21--- a/c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c
     22+++ b/c/src/lib/libbsp/arm/raspberrypi/startup/bspstarthooks.c
     23@@ -29,6 +29,15 @@
     24 #include <libcpu/arm-cp15.h>
     25 #include <bsp.h>
     26
     27+void ll_strout(char *str)
     28+{
     29+  char ch;
     30+  while ((ch = *(str++)) != 0) {
     31+    if (ch == '\n')
     32+      bcm2835_usart_fns.deviceWritePolled(0, '\r');
     33+    bcm2835_usart_fns.deviceWritePolled(0, ch);
     34+  }
     35+}
     36
     37 void BSP_START_TEXT_SECTION bsp_start_hook_0(void)
     38 {
     39@@ -66,6 +75,21 @@ void BSP_START_TEXT_SECTION bsp_start_hook_0(void)
     40
     41   /* Clear Secure or Non-secure Vector Base Address Register */
     42   arm_cp15_set_vector_base_address(0);
     43+
     44+  /* Enable JTAG */
     45+  rtems_gpio_bsp_select_specific_io(0, 22, RPI_ALT_FUNC_4);
     46+  rtems_gpio_bsp_select_specific_io(0, 4,  RPI_ALT_FUNC_5);
     47+  rtems_gpio_bsp_select_specific_io(0, 27, RPI_ALT_FUNC_4);
     48+  rtems_gpio_bsp_select_specific_io(0, 25, RPI_ALT_FUNC_4);
     49+  rtems_gpio_bsp_select_specific_io(0, 23, RPI_ALT_FUNC_4);
     50+  rtems_gpio_bsp_select_specific_io(0, 24, RPI_ALT_FUNC_4);
     51+
     52+  if (1) {
     53+    ll_strout("JTAG Enabled and waiting for GDB\n");
     54+
     55+    continue_execution = 0;
     56+    while (!continue_execution);
     57+  }
     58 }
     59
     60 void BSP_START_TEXT_SECTION bsp_start_hook_1(void)
     61}}}
     62Start RTEMS, when message appears connect from OpenOCD, setup breakpoints and set continue_execution to one
     63{{{
     64(gdb) set continue_execution=1
     65}}}
     66
    1967
    2068File "rpi-jt_usb5.cfg":