Topic : STM8L101xx SR1 Changing Problem

Forum : ST7/STM8

Original Post
Post Information Post
June 19, 2012 - 7:47am

Hi everyone,
I have serious problem about TIMx_SR1 register. This register is 0x07 at the normal time. I finished my code and i am using timer3 everything is ok. Sometimes my timer3 working wrong and i found problem.The problem is SR1 register changing automatically and new value is 0x06. So that update interrupt flag(UIF) is set to zero and after this time TIMER3 always working wrong and not changing this stuation unless upload hex code again to MCU.Can anybody help me? Thanks alot.

Datasheet says to me(RM0013 page:182/266):

UIF: Update Interrupt Flag
This bit is set by hardware on an update event. It is cleared by software.
0: No update occurred.
1: Update interrupt pending. This bit is set by hardware when the registers are updated:
– At overflow if UDIS=0 in the TIMx_CR1 register.
– When CNT is re-initialized by software using the UG bit in TIMx_EGR register, if URS=0 and
UDIS=0 in the TIMx_CR1 register.

"Mustafa Tekdemir"

Post Information Post
October 3, 2012 - 2:30pm

I'm starting with I2C and I have problems, I have the development board of steval IAS003V1. the microprocessor is stm8l101 and I am sending by I2C as master Arduino Uno. No way to communicate, my code is the original steval counter. I want to see the digit that the master Arduino Uno sent to stm8l101 . If he says it's arduino 666 has to show for the display that number. My code stm8l101#include