STMicroelectronics STM32F05 series - Figure 214. Transfer Sequence Flowchart for I2 C Master Transmitter for N>255 Bytes

RM0091 Inter-integrated circuit (I
2
C) interface
Doc ID 018940 Rev 1 493/742
Figure 214. Transfer sequence flowchart for I2C master transmitter for N>255 bytes
MS19861V1
Master initialization
Master
transmission
Write I2Cx_TXDR
I2Cx_ISR.TXIS
=1?
No
Yes
I2Cx_ISR.NACKF
= 1?
Yes
No
NBYTES = 0xFF; N=N-255
RELOAD =1
Configure slave address
Set I2Cx_CR2.START
End
NBYTES
transmitted?
I2Cx_ISR.TC
= 1?
Yes
End
No
Yes
No
Set I2Cx_CR2.START
with slave addess
NBYTES ...
I2Cx_ISR.TCR
= 1?
Yes
IF N< 256
NBYTES =N; N=0;RELOAD=0
AUTOEND=0 for RESTART; 1 for STOP
ELSE
NBYTES =0xFF;N=N-255
RELOAD=1