2 -- * LXPWR slave part *
3 -- common sioreg & common counter for several ADC&PWM blocks
5 -- part of LXPWR motion control board (c) PiKRON Ltd
6 -- idea by Pavel Pisa PiKRON Ltd <pisa@cmp.felk.cvut.cz>
7 -- code by Marek Peca <mp@duch.cz>
14 use ieee.std_logic_1164.all;
15 use ieee.numeric_std.all;
18 entity rpi_pmsm_control is
20 pwm_width : natural:=11
23 gpio2: in std_logic; -- SDA
24 gpio3: in std_logic; -- SCL
25 gpio4: in std_logic; -- CLK
26 gpio14: in std_logic; -- Tx
27 gpio15: in std_logic; -- Rx
28 gpio17: in std_logic; -- RTS
29 gpio18: in std_logic; -- PWM0/PCMCLK
30 gpio27: in std_logic; -- SD1DAT3
31 gpio22: in std_logic; -- SD1CLK
32 gpio23: in std_logic; -- SD1CMD
33 gpio24: in std_logic; -- SD1DAT0
34 gpio10: in std_logic; -- SPI0MOSI
35 gpio9: out std_logic; -- SPI0MISO
36 gpio25: in std_logic; -- SD1DAT1
37 gpio11: in std_logic; -- SPI0SCLK
38 gpio8: in std_logic; -- SPI0CE0
39 gpio7: in std_logic; -- SPI0CE1
40 gpio5: in std_logic; -- GPCLK1
41 gpio6: in std_logic; -- GPCLK2
42 gpio12: in std_logic; -- PWM0
43 gpio13: in std_logic; -- PWM1
44 gpio19: in std_logic; -- PWM1/SPI1MISO/PCMFS
45 gpio16: in std_logic; -- SPI1CE2
46 gpio26: in std_logic; -- SD1DAT2
47 gpio20: in std_logic; -- SPI1MOSI/PCMDIN/GPCLK0
48 gpio21: in std_logic; -- SPI1SCLK/PCMDOUT/GPCLK1
51 -- Each PWM signal has cooresponding shutdown
52 pwm: out std_logic_vector (1 to 3);
53 shdn: out std_logic_vector (1 to 3);
54 -- Fault/power stage status
55 stat: in std_logic_vector (1 to 3);
57 hal_in: in std_logic_vector (1 to 3);
63 power_stat: in std_logic;
65 adc_miso: in std_logic;
66 adc_mosi: out std_logic;
67 adc_sclk: out std_logic;
68 adc_scs: out std_logic;
70 ext_miso: in std_logic; --master in slave out
71 ext_mosi: in std_logic; --master out slave in
72 ext_sclk: in std_logic;
73 ext_scs0: in std_logic;
74 ext_scs1: in std_logic;
75 ext_scs2: in std_logic;
77 rs485_rxd: in std_logic;
78 rs485_txd: out std_logic;
79 rs485_dir: out std_logic;
84 dip_sw: in std_logic_vector (1 to 3); --na desce je prohozene cislovanni
85 -- Unused terminal to keep design tools silent
86 dummy_unused : out std_logic
91 architecture behavioral of rpi_pmsm_control is
92 attribute syn_noprune :boolean;
93 attribute syn_preserve :boolean;
94 attribute syn_keep :boolean;
95 attribute syn_hier :boolean;
100 powerdown, clka: in std_logic;
101 lock, gla: out std_logic
106 port (A: in std_logic; Y: out std_logic);
113 a0, b0: in std_logic;
114 qcount: out std_logic_vector (31 downto 0);
115 a_rise, a_fall, b_rise, b_fall, ab_event: out std_logic;
116 ab_error: out std_logic
126 sync: in std_logic; --flag that counter "restarts-overflows"
127 data_valid:in std_logic; --indicates data is consistent
128 failsafe: in std_logic; --turn off both transistors
129 en_p, en_n: in std_logic; --enable positive & enable shutdown
130 match: in std_logic_vector (pwm_width-1 downto 0); --posion of counter when we swap output logic
131 count: in std_logic_vector (pwm_width-1 downto 0); --we use an external counter
132 out_p, out_n: out std_logic --pwm outputs: positive & shutdown
133 --TODO add the rest of pwm signals, swap match to pwm_word
137 --frequency division by 12
140 clk_in: in std_logic;
145 component adc_reader is
147 clk: in std_logic; --input clk
148 adc_reset: in std_logic;
149 adc_miso: in std_logic; --spi master in slave out
150 adc_channels: out std_logic_vector (35 downto 0); --consistent data of 3 channels
151 adc_sclk: out std_logic; --spi clk
152 adc_scs: out std_logic; --spi slave select
153 adc_mosi: out std_logic; --spi master out slave in
154 measur_count: out std_logic_vector(8 downto 0) --number of accumulated measurments
160 signal adc_reset : std_logic;
161 signal adc_channels: std_logic_vector(71 downto 0);
162 signal adc_m_count: std_logic_vector(8 downto 0);
164 --clock signals for logic and master fail monitoring
165 signal gpio_clk: std_logic;
166 signal pll_clkin, pll_clkout, pll_lock: std_logic;
167 signal clkmon_dly1, clkmon_dly2: std_logic;
168 signal clkmon_fail, clkmon_fail_next: std_logic;
169 signal clkmon_wdg: integer range 0 to 6;
170 signal reset_sync, reset_async: std_logic;
171 signal failsafe, next_failsafe: std_logic;
173 signal spiclk_old: std_logic_vector(1 downto 0); --pro detekci hrany SPI hodin
174 --signal pwm_in, pwm_dir_in: std_logic;
175 signal dat_reg : STD_LOGIC_VECTOR (127 downto 0); --shift register for spi
176 signal position: std_logic_vector(31 downto 0); --pozice z qcounteru
177 signal index_position: std_logic_vector(11 downto 0); --pozice irc_i
178 signal ce0_old: std_logic_vector(1 downto 0);
181 constant pwm_n: natural := 3; --number of pwm outputs
182 --number of ticks per pwm cycle, 2^11=2048
183 constant pwm_period : std_logic_vector (pwm_width-1 downto 0) := (others=>'1');
184 type pwm_res_type is array(1 to 3) of std_logic_vector (pwm_width-1 downto 0);
186 signal pwm_match: pwm_res_type; --point of reversion of pwm output, 0 to 2047
187 signal pwm_count: std_logic_vector (pwm_width-1 downto 0); --counter, 0 to 2047
188 signal pwm_sync: std_logic;
189 signal pwm_en_p: std_logic_vector(1 to 3);
190 signal pwm_en_n: std_logic_vector(1 to 3);
191 signal pwm_sig: std_logic_vector(1 to 3);
193 signal income_data_valid: std_logic;
195 signal clk_4M17: std_logic;
197 -- irc signals processing
198 signal irc_i_prev: std_logic;
200 -- attribute syn_noprune of gpio2 : signal is true;
201 -- attribute syn_preserve of gpio2 : signal is true;
202 -- attribute syn_keep of gpio2 : signal is true;
203 -- attribute syn_hier of gpio2 : signal is true;
206 -- PLL as a reset generator
208 --zesileni signalu GPIO CLK
222 -- the failasfe signal from communication block if CRC is used
223 next_failsafe <= '0';
225 reset_async <= not pll_lock or clkmon_fail;
227 pll_clkin <= gpio_clk;
244 pwm_block: for i in pwm_n downto 1 generate
247 pwm_width => pwm_width
250 clock => gpio_clk, --50 Mhz clk from gpclk on raspberry
251 sync => pwm_sync, --counter restarts
252 data_valid => income_data_valid,
253 failsafe => failsafe,
255 -- pwm config bits & match word
257 en_n => pwm_en_n(i), --enable positive pwm
258 en_p => pwm_en_p(i), --enable "negative" ->activate shutdown
259 match => pwm_match(i),
262 out_p => pwm_sig(i), --positive signal
263 out_n => shdn(i) --reverse signal is in shutdown mode
270 --reset => income_data_valid,
275 -- ADC needs 3.2 MHz clk when powered from +5V Vcc
276 -- 2.0 MHz clk when +2.7V Vcc
277 -- on the input is 4.17Mhz,but this frequency is divided inside adc_reader by 2 to 2.08 Mhz,
278 -- while we use +3.3V Vcc
279 adc_reader_map: adc_reader
282 adc_reset => adc_reset,
283 adc_miso => adc_miso,
284 adc_channels => adc_channels,
285 adc_sclk => adc_sclk,
287 adc_mosi => adc_mosi,
288 measur_count => adc_m_count
292 dummy_unused <= gpio2 and gpio3 and gpio4 and
294 gpio12 and gpio13 and gpio14 and
295 gpio15 and gpio16 and gpio19 and
296 gpio20 and gpio21 and gpio26 and
297 stat(1) and stat(2) and stat(3) and
298 hal_in(1) and hal_in(2) and hal_in(3) and
299 irc_i and power_stat and
302 can_rx and can_tx and
303 dip_sw(1) and dip_sw(2) and dip_sw(3) and
305 gpio17 and gpio18 and gpio27 and gpio22 and gpio23 and gpio24 and gpio25 and
306 gpio8 and gpio11 and gpio7 and gpio10 and
307 ext_scs1 and ext_scs2 and ext_miso and ext_mosi and ext_sclk and ext_scs0;
313 pwm(1) <= pwm_sig(1) and dip_sw(1);
314 pwm(2) <= pwm_sig(2) and dip_sw(2);
315 pwm(3) <= pwm_sig(3) and dip_sw(3);
320 wait until (gpio_clk'event and gpio_clk='1');
321 if irc_i_prev = '0' and irc_i = '1' then
322 index_position(11 downto 0)<=position(11 downto 0);
329 wait until (gpio_clk'event and gpio_clk='1');
330 IF(pwm_count = pwm_period) THEN
331 --end of period reached
332 pwm_count <= (others=>'0'); --reset counter
333 pwm_sync <= '1'; -- inform PWM logic about new period start
334 ELSE --end of period not reached
335 pwm_count <= std_logic_vector(unsigned(pwm_count)+1); --increment counter
342 --position is obtained on rising edge -> we should write it on next cycle
343 wait until (gpio_clk'event and gpio_clk='1');
345 --SCLK edge detection
346 spiclk_old(0)<=gpio11;
347 spiclk_old(1)<=spiclk_old(0);
351 ce0_old(1)<=ce0_old(0);
353 if (spiclk_old="01") then --rising edge, faze cteni
354 if (gpio7 = '0') then -- SPI CS must be selected
355 -- shift serial data into dat_reg on each rising edge
357 dat_reg(127 downto 0) <= dat_reg(126 downto 0) & gpio10;
359 elsif (spiclk_old="10" ) then --falling edge, faze zapisu
360 if (gpio7 = '0') then
361 gpio9 <= dat_reg(127); --zapisujeme nejdriv MSB
366 --sestupna hrana SS, pripravime data pro prenos
367 if (ce0_old = "10" ) then
368 income_data_valid<='0';
369 dat_reg(127 downto 96) <= position(31 downto 0); --pozice
370 dat_reg(95 downto 93) <= hal_in(1 to 3); --halovy sondy
371 dat_reg(92 downto 81) <= index_position(11 downto 0); --position of irc_i
372 dat_reg(80 downto 72) <=adc_m_count(8 downto 0); --count of measurments
373 --data order schould be: ch2 downto ch0 downto ch1
374 dat_reg(71 downto 0) <= adc_channels(71 downto 0); --current mesurments
375 adc_reset<='0'; --remove reset flag, and wait on its rising edge
376 elsif (ce0_old = "01") then --rising edge of SS, we should read the data
378 pwm_en_p(1 to 3)<=dat_reg(126 downto 124);
379 pwm_en_n(1 to 3)<=dat_reg(123 downto 121);
380 --11 bit pwm TODO: make it generic
381 pwm_match(1)(pwm_width-1 downto 0)<=dat_reg(66 downto 56);
382 pwm_match(2)(pwm_width-1 downto 0)<=dat_reg(55 downto 45);
384 pwm_match(3)(pwm_width-1 downto 0)<=dat_reg(42 downto 32);
385 income_data_valid<='1';
389 clock_monitor: process (pll_clkout, gpio_clk, clkmon_dly1, clkmon_wdg, clkmon_fail_next)
391 if pll_clkout'event and pll_clkout = '1' then
392 clkmon_dly1 <= gpio_clk;
393 clkmon_dly2 <= clkmon_dly1;
394 if clkmon_dly1 = '0' and clkmon_dly2 = '1' then
396 clkmon_fail_next <= '0';
397 elsif clkmon_wdg > 0 then
398 clkmon_wdg <= clkmon_wdg - 1;
399 clkmon_fail_next <= '0';
402 clkmon_fail_next <= '1';
404 clkmon_fail <= clkmon_fail_next;
408 async_rst: process (gpio_clk, reset_async, reset_sync)
410 if reset_async = '1' then
412 elsif gpio_clk'event and gpio_clk = '1' then
413 failsafe <= next_failsafe or reset_sync;
417 sync_rst: process (gpio_clk, reset_async)
419 if gpio_clk'event and gpio_clk = '1' then
420 reset_sync <= reset_async;