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ADSP-BF51x SPI Slave Boot not starting

Question asked by jimhi on May 23, 2013

The blackfin is set to Boot Mode 4 (100). As per Figure 26-19 in the Processor Hardware Reference (page 1311), I wrote code that does the following on the host side:


1) Send the Reset Pin (pin 35) on the blackfin HIGH (1). I also tried sending it LOW (0) instead, as well as LOW then HIGH. What exactly is a pulse? Am I misunderstanding this?

2) Right after, I wait for the HWAIT Pin (pin 22) to send back LOW. So far, the HWAIT has always returned HIGH and never goes low. I tried waiting 10 minutes or so, but it stays at HIGH till I turn off the program.