Hello, I am using a discovery board with an STM32l152. The user push button is ported to PA0. I need to read from the IDR bit on the GPIOA when the button is pushed. I read that it can only be accessed via word only. I have already set up the moder, otyper, etc correctly and checked it against the debugger. Below is the offset address of GPIOA_IDR.
LDR r0, =0x40000000 ;PERIPH_BASE ADD r0, #0x20000 ;AHBPERIPH_BASE ADD r0, #0x0400 ;GPIOA_BASE ADD r0, #0x10 if((GPIOA-IDR & 0x1) == 1) turn on LED
I would like to do the the C statement above in assembly. Thank you very much
View all questions in Keil forum