hello, i have a problem on a developpement board toolstick which is associated to a 8051f330. for example: electronicdesign.com/.../14025_fig.1.jpg
I want to make make and simule an SMBUS communication but i don't happend
I found an example on the web: www.silabs.com/.../an141.pdf and i try the first example, 8051 as a master (p24).
When i send a start, i haven't interruption on the SMBUS interrupt and i don't know why.
Thanks for your help and sorry for my bad english, i'm french.
So when i write a STA:
void SMB_Write (void) { while (SMB_BUSY); // Wait for SMBus to be free. SMB_BUSY = 1; // Claim SMBus (set to busy) SMB_RW = 0; // Mark this transfer as a WRITE STA = 1; // Start transfer }
i don't ho here..
void SMBus_ISR (void) interrupt 7 { bit FAIL = 0; // Used by the ISR to flag failed // transfers static bit ADDR_SEND = 0; // Used by the ISR to flag byte // transmissions as slave addresses if (ARBLOST == 0) // Check for errors { // Normal operation switch (SMB0CN & 0xF0) // Status vector { // Master Transmitter/Receiver: START condition transmitted. case SMB_MTSTA: SMB0DAT = TARGET; // Load address of the target slave SMB0DAT &= 0xFE; // Clear the LSB of the address for the // R/W bit
instead of electronic design, why do you not use SILabs for examples community.silabs.com/.../Forum