|
Title: Control an MC145152 (PLL) by a processor Post by: folkeu on March 10, 2021, 03:38:22 15:38 Hi all,
I'm trying to drive an MC145152 (PLL) by a Pic processor through an MCP23s17. The MCp23s17 replaces the programming DIPs. I need help creating the routine in C to decompose a decimal number into a sum of powers of two. The decimal number can range from 3 to 1023 (Counter N). I stay in the program, I almost finished, I stumble on it. Thank you Fanch Title: Re: Control an MC145152 (PLL) by a processor Post by: titi on March 10, 2021, 05:23:26 17:23 Hi folkeu,
no need to decompose your decimal number into a sum of powers of two. Just use one port with 8 bits as low byte and the 2 high bits on the other port. Your value 3 to 1023 is on a unsigned integer of 16 bits. So just send the low byte of the value one port and the first 2 high bits of the high byte to the second port of the MCP23s17. Best regards. |