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[Request] [Bootloader] for TIVA TM4C1231H6PZ

Hi,

 I'm Using TIVA TM4C1231H6PZ Controller.

i want to update my firmware by  pin-based forced update check.

for that i connected a switch to Pin 48 (PK1) in the controller.

my application is when we switch on the power supply if the switch is in pressed state it should go to bootloader mode.

for this i uncomment the 

 

#define ENABLE_UPDATE_CHECK

in the bl_config.h (C:\ti\TivaWare_C_Series-2.0.1.11577\examples\boards\dk-tm4c123g\boot_serial\ccs)

i have to configure  PK1.

i have to replace  SYSCTL_RCGC2_GPIOB with SYSCTL_RCGC2_GPIOK in below

#define FORCED_UPDATE_PERIPH    SYSCTL_RCGC2_GPIOB

but in hw_sysctl.h i didnt find SYSCTL_RCGC2_GPIOK

//*****************************************************************************
//
// The following are defines for the bit fields in the SYSCTL_RCGC2 register.
//
//*****************************************************************************
#define SYSCTL_RCGC2_USB0       0x00010000  // USB0 Clock Gating Control
#define SYSCTL_RCGC2_UDMA       0x00002000  // Micro-DMA Clock Gating Control
#define SYSCTL_RCGC2_GPIOJ      0x00000100  // Port J Clock Gating Control
#define SYSCTL_RCGC2_GPIOH      0x00000080  // Port H Clock Gating Control
#define SYSCTL_RCGC2_GPIOG      0x00000040  // Port G Clock Gating Control
#define SYSCTL_RCGC2_GPIOF      0x00000020  // Port F Clock Gating Control
#define SYSCTL_RCGC2_GPIOE      0x00000010  // Port E Clock Gating Control
#define SYSCTL_RCGC2_GPIOD      0x00000008  // Port D Clock Gating Control
#define SYSCTL_RCGC2_GPIOC      0x00000004  // Port C Clock Gating Control
#define SYSCTL_RCGC2_GPIOB      0x00000002  // Port B Clock Gating Control
#define SYSCTL_RCGC2_GPIOA      0x00000001  // Port A Clock Gating Control

is there any other way to configure that port, help me to resolve this problem

Thank You.