Unable to configure SYSCFG->CFGR1 reg when init UCPD on stm32g0

[LOMO]

the Dead Battery Signals have been selected in stm32cubeMX, but when it run to "MODIFY_REG(SYSCFG->CFGR1, (SYSCFG_CFGR1_UCPD1_STROBE | SYSCFG_CFGR1_UCPD2_STROBE), ConfigDeadBattery);",SYSCFG->CFGR1 keeps default value.the clock is enabled.

[waclawek.jan]

Which STM32? What is your hardware - a Nucleo board, or your own board?

Can you change SYSCFG->CFGR1in debugger?

Can you change other SYSCFG_CFGR1 bits?

JW

[LOMO]

stm32G071CB , my board ,i Can change other SYSCFG_CFGR1 bits in debugger.

[waclawek.jan · Accepted solution]

According to RM, these two bits are write-only (w), not read-write (rw), so even if you write 1 into them and they work as intended, they may not read 1 back.

 

JW

[LOMO]

really appreciate!