Posted on June 26, 2018 at 00:02I am having difficulty transmitting on my stm32l071k8. I am using a STM32l073RZ nucleo board for benchtop development.
my lab setup is just a nucleo board connected to an oscilloscope for SCL and SDA. Currently my device sending out the address (0xFF) and then it waits in the code snippet:
// wait for transmit to occur
while( (I2Cx->ISR & 0x1) == 0)
{
LL_mDelay(1);
}
Which i believe means it is waiting to send the data already in the TXDR register.
However, the TXE bit never goes high (data is still in TXDR) and i dont see any further transmission on the o-scope.
I have attached a scope shot of my address write and my two snippets of init and transmit code. Hopefully somebody sees my glaring mistake.
From the scope shot it looks like i just never get an acknowledge? or clock stretching isn't happening? but honestly at this point i'm not really sure so i figured i would get some help from this community.!
Thanks
Casey
