Application - Joystick

Joysticks module

HW connection & Timing

Module        STM32F4
=====================
GND           GND 
5v            5v
VRX           PA0 - GPIO(ADC)
VRY           PA1 - GPIO(ADC)
SW            PE14 - GPIO(Interrupt)

ADC DMA

HAL_ADC_Start_DMA(&hadc1, (uint32_t*)ADC_Buffer, 2);

GDB for ADC

console 1

tommy@tommy-HP-EliteBook-Folio-1040-G2:~/projects/mbed/ST/stlink.git$ sudo ./st-util 
2016-07-10T14:40:18 INFO src/stlink-common.c: Loading device parameters....
2016-07-10T14:40:18 INFO src/stlink-common.c: Device connected is: F4 device, id 0x10016413
2016-07-10T14:40:18 INFO src/stlink-common.c: SRAM size: 0x30000 bytes (192 KiB), Flash: 0x100000 bytes (1024 KiB) in pages of 16384 bytes
2016-07-10T14:40:18 INFO gdbserver/gdb-server.c: Chip ID is 00000413, Core ID is  2ba01477.
2016-07-10T14:40:18 INFO gdbserver/gdb-server.c: Target voltage is 2905 mV.
2016-07-10T14:40:18 INFO gdbserver/gdb-server.c: Listening at *:4242...
2016-07-10T14:40:18 INFO gdbserver/gdb-server.c: Found 6 hw breakpoint registers
2016-07-10T14:40:18 INFO gdbserver/gdb-server.c: GDB connected.

console 2

tommy@tommy-HP-EliteBook-Folio-1040-G2:~/projects/mbed/ST/stm32cubef4.svn/Projects/STM32F4-Discovery/Applications/max7219_x4/SW4STM32/max7219_x4/Debug$ arm-none-eabi-gdb max7219_x4.elf 
GNU gdb (7.8-0ubuntu1+6) 7.8
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Type "show configuration" for configuration details.
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0x08004a70 in ?? ()
/home/tommy/.gdbinit:8: Error in sourced command file:
No executable file specified.
Use the "file" or "exec-file" command.
Reading symbols from max7219_x4.elf...done.
(gdb) tar extended-remote :4242
(gdb) r
The program being debugged has been started already.
Start it from the beginning? (y or n) y

Starting program: /home/tommy/projects/mbed/ST/stm32cubef4.svn/Projects/STM32F4-Discovery/Applications/max7219_x4/SW4STM32/max7219_x4/Debug/max7219_x4.elf 

//After programming, press Ctrl + C to stop in somewhere
^C
^CQuit
(gdb) bt
#0  0x080027d6 in HAL_Delay (Delay=Delay@entry=100)
    at /home/tommy/projects/mbed/ST/stm32cubef4.svn/Projects/STM32F4-Discovery/Applications/max7219_x4/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal.c:342
#1  0x08003d1a in StartDefaultTask (argument=<optimized out>)
    at /home/tommy/projects/mbed/ST/stm32cubef4.svn/Projects/STM32F4-Discovery/Applications/max7219_x4/Src/main.c:761
#2  0x08000d30 in uxListRemove (pxItemToRemove=<optimized out>)
    at /home/tommy/projects/mbed/ST/stm32cubef4.svn/Projects/STM32F4-Discovery/Applications/max7219_x4/Middlewares/Third_Party/FreeRTOS/Source/list.c:238
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

//Watch DMA variable
(gdb) print ADC_Buffer //no action
$6 = {2364, 2434}
(gdb) print ADC_Buffer //VRX to left end
$7 = {18, 2440}
(gdb) print ADC_Buffer //VRX to right end
$9 = {4095, 2436}
(gdb) print ADC_Buffer //VRY to up end
$10 = {3119, 13}
(gdb) print ADC_Buffer //VRY to down end
$11 = {2349, 4095}
(gdb)