Dimmable LED Siv Basys 3 Board: 5 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26

Hauv phau ntawv qhia no peb yuav tsim thiab tswj cov txheej txheem sab nrauv LED dimming. Nrog cov nyees khawm muaj, tus neeg siv tuaj yeem txo lub teeb LED rau txhua qhov kev xav tau ci. Lub kaw lus siv Basys 3 lub rooj tsavxwm, thiab nws txuas nrog lub khob cij uas muaj cov tiv thaiv thiab lub teeb LED. Nias lub khawm "nce" xaiv yuav ua rau pom kev ci ntsa iab, thiab nias lub pob "nqis" yuav txo qhov ci ci mus rau xoom. Tsis tsuas yog qhov no tiv thaiv tus neeg siv los ntawm qhov muag tsis pom los ntawm lub teeb ci zoo li lub hnub tab sis nws tseem txuag lub zog!

Kauj Ruam 1: Tsim Cov Tswv Yim Counter

Rau cov kauj ruam no peb tsim cov khoom siv uas txiav txim siab qib kev ci ntsa iab (dhau ntawm lub moos) los ntawm kev siv ob lub hloov pauv: ib qho kom nce thiab ib qho kom txo qis. Siv VHDL, peb tsim lub txee los ntawm kev siv D flip-flops. Nias lub pob "nce" thawb lub xeev tom ntej mus rau lub xeev tam sim no, tso tawm mus rau xya ntu ntu thiab lub teeb LED.

entity updown_counter yog

Chaw nres nkoj (present_state: tawm STD_LOGIC_VECTOR (3 downto 0); yav dhau los_state: hauv STD_LOGIC_VECTOR (3 downto 0); next_state: hauv STD_LOGIC_VECTOR (3 downto 0); clk: hauv STD_LOGIC; down_enable: hauv STD kawg updown_counter; architecture Tus cwj pwm ntawm kev hloov kho tshiab_counter yog pib flop: txheej txheem (next_state, clk, nce_enable, down_enable, yav dhau los_state) pib yog (nce_edge (clk)) ces yog (up_enable = '1' thiab tsis yog (next_state = "0000")) ces present_state <= tom ntej_state; elsif (down_enable = '1' thiab tsis yog (yav dhau los_state = "1111")) ces tam sim no_state <= yav dhau los_state; kawg yog; kawg yog; kawg txheej txheem flop; kawg Tus Cwj Pwm;

Peb kuj xav tau lub moos rau txhua qhov kev nkag mus rau hauv qhov chaw (thaum nws nce), yog li peb kuj tsim lub moos faib uas txiav txim siab nrawm npaum li cas cov nyees khawm tuaj yeem nias ntawm txhua qib ntawm qhov ci. Lub moos faib ua haujlwm no tso cai rau peb kom ua kom raug rau qib raug rau ntawm xya ntu ntu thiab tsim kom raug rau qib raug rau txhua qib.

entity counter_clkDiv yog

Chaw nres nkoj (clk: hauv std_logic; sclk: tawm std_logic); kawg counter_clkDiv; architecture my_clk_div ntawm counter_clkDiv tas li max_count: integer: = (10000000); teeb liab tmp_clk: std_logic: = '0'; pib my_div: txheej txheem (clk, tmp_clk) sib txawv div_cnt: integer: = 0; pib yog (nce_edge (clk)) ces yog (div_cnt> = MAX_COUNT) ces tmp_clk <= tsis tmp_clk; div_cnt: = 0; lwm qhov div_cnt: = div_cnt + 1; kawg yog; kawg yog; sclk <= tmp_clk; kawg txheej txheem my_div; kawg my_clk_div;

Kauj Ruam 2: Tsim LED Clock Divider

Rau cov kauj ruam no peb tsim lub moos faib rau lub teeb LED txhawm rau txiav txim siab 16 qib sib txawv ntawm kev siv. Nrog 0 tau tawm mus rau 15 tso tawm qhov siab tshaj plaws, lub moos faib ua ntu zuj zus txhua lub pob nyem los ntawm qhov peb teeb tsa ua qib ci ntsa iab. Txhua qib nce ntxiv txhais tau tias nce hauv lub moos rau lub teeb LED. Nco ntsoov tias qhov ci ntsa iab tsis nce ntxiv, peb cranked lub moos mus rau qhov siab tshaj plaws nws tuaj yeem mus thiab txo peb cov moos raws li.

Nco tseg: peb tab tom siv LED xiav. Siv cov xim sib txawv (zoo li liab) yuav xav tau lub moos sib txawv me ntsis rau nws; qhov nruab nrab qhov ci ci rau xiav tuaj yeem yog qhov ci tshaj plaws rau liab. Qhov no tshwm sim vim qhov sib txawv ntawm lub teeb yuav xav tau ntau lub zog, nrog cov xim txias dua li xim liab thiab xiav xav tau lub zog ntau dua, thaum cov xim sov dua li liab thiab txiv kab ntxwv xav tau lub zog tsawg dua.

entity led_clkDiv is Port (present_state: in STD_LOGIC_VECTOR (3 downto 0); clk: in STD_LOGIC; led_clk: tawm STD_LOGIC); kawg led_clkDiv; architecture Tus cwj pwm coj ntawm led_clkDiv yog teeb liab tmp_clk: std_logic: = '0'; sib koom sib txawv max_count: integer; pib suav_stuff: txheej txheem (tam sim no_state) pib rooj plaub present_state yog thaum "0000" => max_count: = 0; thaum "0001" => max_count: = 2; thaum "0010" => max_count: = 4; thaum "0011" => max_count: = 6; thaum "0100" => max_count: = 8; thaum "0101" => max_count: = 10; thaum "0110" => max_count: = 12; thaum "0111" => max_count: = 14; thaum "1000" => max_count: = 16; thaum "1001" => max_count: = 25; thaum "1010" => max_count: = 50; thaum "1011" => max_count: = 100; thaum "1100" => max_count: = 150; thaum "1101" => max_count: = 200; thaum "1110" => max_count: = 250; thaum "1111" => max_count: = 300; rooj plaub xaus; kawg txheej txheem count_stuff; my_div: txheej txheem (clk, tmp_clk, tam sim no_state) sib txawv div_cnt: integer: = 0; pib yog (nce_edge (clk)) ces yog (div_cnt> = max_count) ces tmp_clk <= tsis tmp_clk; div_cnt: = 0; lwm qhov div_cnt: = div_cnt + 1; kawg yog; kawg yog; led_clk <= tmp_clk; kawg txheej txheem my_div; kawg Tus Cwj Pwm;

Kauj Ruam 3: Tsim LED Controller

Tam sim no uas peb tau ua nws nyob deb no, nws yog lub sijhawm kawg thaum kawg ua ke txhua yam khoom siv uas peb tau tsim kom deb li deb mus rau hauv LED Controller file.

Yuav kom xaus, cov khoom siv yog cov hauv qab no:

• Cov tswv yim tawm tswv yim (updown_counter)
• Clock divider (counter_clkDiv)
• LED moos faib (led_clkDiv)
• Xya-ntu tso saib tsav tsheb (sseg_dec) (txuas nrog cov ntawv)

Xya-ntu cov neeg tsav tsheb tsis tau tham yav dhau los vim tias peb tau qiv cov ntaub ntawv VHDL los ntawm Dr. Bryan Mealy vim nws txoj cai ntev thiab nyuaj. Dab tsi nws qhov tseem ceeb ua yog tsav peb lub khawm nkag mus rau xya ntu ntu ntawm Basys 3 pawg thawj coj kom peb paub tias qib kev ci ntsa iab nyob rau qhov twg.

Txav mus rau tom ntej, Tus Tswj Xyuas LED siv flip flops txhawm rau nce lossis txo qhov suav uas tswj hwm ob ntu ntu ntu thiab qib qhov ci ntawm LED teeb ib txhij.

cov khoom suav yog Port (clk: hauv STD_LOGIC; nce_enable: hauv STD_LOGIC; down_enable: hauv STD_LOGIC; SEGMENTS: tawm STD_LOGIC_VECTOR (7 downto 0); DISP_EN: tawm STD_LOGIC_VECTOR (3 downto:) kawg txee; architecture Kev coj tus cwj pwm ntawm lub txee yog kev hloov kho tshiab_counter yog Port (tam sim no_state: tawm STD_LOGIC_VECTOR (3 downto 0); yav dhau los_state: hauv STD_LOGIC_VECTOR (3 downto 0); next_state: hauv STD_LOGIC_VECTOR (3 downto 0); clk: hauv up_enable: hauv STD_LOGIC); kawg tivthaiv updown_counter; tivthaiv counter_clkDiv yog Port (clk: hauv std_logic; sclk: tawm std_logic); kawg tiv thaiv counter_clkDiv; tivthaiv sseg_dec yog Port (ALU_VAL: in std_logic_vector (7 downto 0); SIGN: in std_logic; VALID: in std_logic; CLK: in std_logic; DISP_EN: tawm std_logic_vector (3 downto 0); SEGMENTS:; kawg tivthaiv sseg_dec; tivthaiv led_clkDiv yog Port (tam sim no_state: hauv STD_LOGIC_VECTOR (3 downto 0); clk: hauv STD_LOGIC; led_clk: tawm STD_LOGIC); kawg tivthaiv led_clkDiv; teeb liab present_state: STD_LOGIC_VECTOR (3 downto 0): = "0000"; teeb liab next_state: STD_LOGIC_VECTOR (3 downto 0): = "0000"; teeb liab yav dhau los_state: STD_LOGIC_VECTOR (3 downto 0): = "0000"; teeb liab Alu_Val: STD_LOGIC_VECTOR (7 downto 0); teeb liab sclk: STD_LOGIC; pib Alu_Val (7 downto 4) <= "0000"; Alu_Val (3 downto 0) <= tam sim no_state; next_state (0) <= tsis (tam sim no_state (0))); next_state (1) <= tam sim no_state (0) xor tam sim no_state (1); next_state (2) <= (present_state (0) thiab present_state (1)) xor present_state (2); next_state (3) <= (present_state (0) thiab present_state (1) thiab present_state (2)) xor present_state (3); yav dhau los_state (0) <= tsis (tam sim no_state (0))); yav dhau los_state (1) <= tam sim no_state (0) xnor tam sim no_state (1); yav dhau los_state (2) <= (tam sim no_state (0) lossis tam sim no_state (1)) xor tam sim no_state (2); yav dhau los_state (3) sclk, next_state => next_state, yav dhau los_state => yav dhau los_state, up_enable => up_enable, down_enable => down_enable, present_state => tam sim no_state); display: sseg_dec chaw nres nkoj daim ntawv qhia (ALU_VAL => Alu_Val, SIGN => '0', VALID => '1', CLK => clk, DISP_EN => DISP_EN, SEGMENTS => SEGMENTS); led_div: led_clkDiv port map (clk => clk, present_state => present_state, led_clk => led_clk); clk_div: counter_clkDiv chaw nres nkoj daim ntawv qhia (clk => clk, sclk => sclk); kawg Tus Cwj Pwm;

Kauj Ruam 4: Tsim kom muaj kev txwv thiab sib dhos

Kev txwv

Txhawm rau teeb tsa kom raug thiab teeb tsa Lub Rooj Sib Tham Basys 3, peb yuav tsum xub teeb tsa peb cov ntaub ntawv txwv uas txuas nrog rau theem no. Cov chaw hauv qab no tau hloov kho:

Nyees khawm

• Hloov T18 rau "up_enable" (nce qhov ci)
• Hloov U17 rau "down_enable" (txo qhov ci)

7 ntu zaub

• W7, W6, U8, V8, U5, V5, U7, V7 sawv cev rau txhua ntu ntawm ib qho zaub
• U2, U4, V4, W4 sawv cev rau txhua qhov anode tso tawm (tsuas yog 2 ua haujlwm vim tias peb tus lej siab tshaj yog 15)

PMOD Lub taub hau JC

JC7 yog qhov uas peb txuas ib qho ntawm cov xov hlau ntawm lub teeb LED, thiab lwm txoj xov hlau coj mus rau GROUND

Tom qab teeb tsa qhov no tag nrho, txhua yam koj yuav tsum tau ua yog tsim koj li bitstream (nrog rau qhov software twg koj siv piv txwv li Vivado), teeb tsa koj lub rooj tsavxwm, thiab tawg! Koj tau txais koj tus kheej pawg thawj coj ua haujlwm.

Nco tseg: Tus pin taw qhia tuaj yeem pom ntawm Basys 3 Datasheet ntawm no.

Los ua ke

Kauj Ruam 5: Siv Koj Li Dimmer Hloov

Yog tias txhua yam mus zoo, koj yuav tsum muaj lub kaw lus ua haujlwm dimmer. Txhawm rau ua kom pom tseeb, nias lub pob saum toj kawg nkaus yuav ua rau koj qhov ci ci (txhua txoj kev mus rau 15), thiab nias lub pob kom qis yuav txo koj qhov ci ci (txhua txoj kev mus rau 0). Vam tias txhua yam mus zoo rau koj tam sim no-pom qhov muag!