E128 ATD PAD8+ problem.. help!

hex4def6 — Tue, 29 Apr 2008 11:27:48 GMT

Hi,

I'm trying to read from the ATD pins PAD8...PAD15, and I'm only getting zeroes. I am able to get data from PAD0...PAD7 however. I've been going through the manual back to back, and I'm stuck. Any suggestions?

Here's my code:

ATD0CTL2 = 0x80; /* Power up A/D, no interrupts */
ATD0CTL3 = 0x40; /* Do eight conversions */
ATD0CTL4 = 0x05; /* 10-bit mode, 7 us/conversion */
ATD0CTL5 = 0x90;

while ((ATD0STAT0 & 0x80) == 0 ) ; /* Wait for sequence to finish */

printf("%d %d %d %d %d %d% %d %d %d %d %d %d %d %d% %d %d\r\n", ATDDR0, ATDDR1, ATDDR2, ATDDR3, ATDDR4, ATDDR5, ATDDR6, ATDDR7, ATDDR8, ATDDR9, ATDDR10, ATDDR11, ATDDR12, ATDDR13, ATDDR14, ATDDR15);

Here's a typical result from the printf line:

517 165 98 317 35 558 75 55 0 0 0 0 0 0 0 0

What am I doing wrong?

Thanks,
Stewart

Re: E128 ATD PAD8+ problem.. help!

DPB — Tue, 29 Apr 2008 15:24:33 GMT

Hello

The listed code uses "ATD0CTL3 = 0x40; /* Do eight conversions */"
This ATD0CTL3 setting selects only 8 conversions (as you correctly commented).
To select 16 conversions use ATD0CTL3 = 0x00.
(Refer to Table 6-5 page 214 of the E128 datasheet).

DPB

topic E128 ATD PAD8+ problem.. help! in S12 / MagniV Microcontrollers

E128 ATD PAD8+ problem.. help!

Re: E128 ATD PAD8+ problem.. help!