Module stm32_hal2::pac::gpioa::lckr

This register is used to lock the configuration of the port bits when a correct write sequence is applied to bit 16 (LCKK). The value of bits [15:0] is used to lock the configuration of the GPIO. During the write sequence, the value of LCKR[15:0] must not change. When the LOCK sequence has been applied on a port bit, the value of this port bit can no longer be modified until the next MCU reset or peripheral reset.A specific write sequence is used to write to the GPIOx_LCKR register. Only word access (32-bit long) is allowed during this locking sequence.Each lock bit freezes a specific configuration register (control and alternate function registers).

Structs

• LCKR_SPEC
  This register is used to lock the configuration of the port bits when a correct write sequence is applied to bit 16 (LCKK). The value of bits [15:0] is used to lock the configuration of the GPIO. During the write sequence, the value of LCKR[15:0] must not change. When the LOCK sequence has been applied on a port bit, the value of this port bit can no longer be modified until the next MCU reset or peripheral reset.A specific write sequence is used to write to the GPIOx_LCKR register. Only word access (32-bit long) is allowed during this locking sequence.Each lock bit freezes a specific configuration register (control and alternate function registers).
• R
  Register LCKR reader
• W
  Register LCKR writer

Enums

• LCK0_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK1_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK2_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK3_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK4_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK5_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK6_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK7_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK8_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK9_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK10_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK11_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK12_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK13_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK14_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK15_A
  Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCKK_A
  Lock key This bit can be read any time. It can only be modified using the lock key write sequence. LOCK key write sequence: WR LCKR[16] = 1 + LCKR[15:0] WR LCKR[16] = 0 + LCKR[15:0] WR LCKR[16] = 1 + LCKR[15:0] RD LCKR RD LCKR[16] = 1 (this read operation is optional but it confirms that the lock is active) Note: During the LOCK key write sequence, the value of LCK[15:0] must not change. Any error in the lock sequence aborts the lock. After the first lock sequence on any bit of the port, any read access on the LCKK bit will return 1 until the next MCU reset or peripheral reset.

Type Aliases

• LCK0_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK0_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK1_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK1_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK2_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK2_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK3_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK3_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK4_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK4_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK5_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK5_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK6_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK6_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK7_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK7_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK8_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK8_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK9_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK9_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK10_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK10_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK11_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK11_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK12_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK12_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK13_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK13_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK14_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK14_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK15_R
  Field LCK0 reader - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCK15_W
  Field LCK0 writer - Port x lock bit y (y= 0..15) These bits are read/write but can only be written when the LCKK bit is 0.
• LCKK_R
  Field LCKK reader - Lock key This bit can be read any time. It can only be modified using the lock key write sequence. LOCK key write sequence: WR LCKR[16] = 1 + LCKR[15:0] WR LCKR[16] = 0 + LCKR[15:0] WR LCKR[16] = 1 + LCKR[15:0] RD LCKR RD LCKR[16] = 1 (this read operation is optional but it confirms that the lock is active) Note: During the LOCK key write sequence, the value of LCK[15:0] must not change. Any error in the lock sequence aborts the lock. After the first lock sequence on any bit of the port, any read access on the LCKK bit will return 1 until the next MCU reset or peripheral reset.
• LCKK_W
  Field LCKK writer - Lock key This bit can be read any time. It can only be modified using the lock key write sequence. LOCK key write sequence: WR LCKR[16] = 1 + LCKR[15:0] WR LCKR[16] = 0 + LCKR[15:0] WR LCKR[16] = 1 + LCKR[15:0] RD LCKR RD LCKR[16] = 1 (this read operation is optional but it confirms that the lock is active) Note: During the LOCK key write sequence, the value of LCK[15:0] must not change. Any error in the lock sequence aborts the lock. After the first lock sequence on any bit of the port, any read access on the LCKK bit will return 1 until the next MCU reset or peripheral reset.