From: Martin Prudek <prudemar@fel.cvut.cz>
Date: Sun, 5 Apr 2015 15:27:53 +0000 (+0200)
Subject: Tested version of ADC state machine. Tested only to prove that 'something works'... 
X-Git-Url: https://rtime.felk.cvut.cz/gitweb/fpga/rpi-motor-control.git/commitdiff_plain/6aed1bb7f39be0834cce9351ecc4f09c3c8aef06

Tested version of ADC state machine. Tested only to prove that 'something works'. Cannot verify measured data - so thah implemented communication protocol might not be workung.
---

diff --git a/pmsm-control/rpi_mc_simple_dc.vhdl b/pmsm-control/rpi_mc_simple_dc.vhdl
index 11f97af..0ff098e 100644
--- a/pmsm-control/rpi_mc_simple_dc.vhdl
+++ b/pmsm-control/rpi_mc_simple_dc.vhdl
@@ -238,6 +238,7 @@ begin
 			dat_reg(63 downto 61) <= hal_in(1 to 3); --halovy sondy
 			dat_reg(60 downto 36) <= (others => '1'); --let the rest fill with ones
 			dat_reg(35 downto 0) <= adc_channels(35 downto 0); --current mesurments
+			adc_reset<='0'; --remove reset flag, and wait on its rising edge
 		elsif (ce0_old = "01") then --rising edge of SS, we should read the data
 			adc_reset<=dat_reg(95);
 		end if;
@@ -315,13 +316,16 @@ begin
 				if (data_ready='1') then
 					case channel is
 						when ch0=>
-							adc_channels(35 downto 24)<=adc_data(11 downto 0);
+							--adc_channels(35 downto 24)<=adc_data(11 downto 0);
+							adc_channels(35 downto 24)<=(others=>'0');
 							channel:=ch1;
 						when ch1=>
-							adc_channels(23 downto 12)<=adc_data(11 downto 0);
+							--adc_channels(23 downto 12)<=adc_data(11 downto 0);
+							adc_channels(23 downto 12)<=(others=>'1');
 							channel:=ch2;
 						when ch2=>
-							adc_channels(11 downto 0)<=adc_data(11 downto 0);
+							--adc_channels(11 downto 0)<=adc_data(11 downto 0);
+							adc_channels(11 downto 0)<=(others=>'0');
 							channel:=ch0;
 					end case;
 				end if;