Infrared encoding and decoding——GREE remote control transmission

dvd1478

Infrared encoding and decoding——GREE remote control transmission [Copy link]

In the last issue, we described infrared decoding and the errors caused by infrared transmission. Last Issue Review [Infrared]02. Infrared Coding and Decoding - GREE Remote Controlhttps://bbs.eeworld.com.cn/thread-462015-1-1.html Principles of infrared coding for GREE remote control file:///C:/Documents%20and%20Settings/Administrator/Local%20Settings/Application%20Data/YNote/data/1696933323@qq.com/43ff4fe8f4dd442c9376e4071652cbe1/clipboard.png The encoding is as follows The code is as follows: [/table ]IRsend_enableIROut The main function is to configure the carrier frequency of the PWM wave, which is generally 38KHZ 1/ 3~1/4Duty (Of course there are some special ones) From [Infrared] 01, Infrared remote control introduction and reception [ /size]https://bbs.eeworld.com.cn/thread-461935-1-1.html[/ u]It can be known [attach]198926[ /attach] To emit infrared waves, use PWM to drive the infrared LED to transmit infrared waves file:///C:/Documents%20and%20Settings/Administrator/Local%20Settings/Application%20Data/ YNote/data/1696933323@qq.com/475d1bd30dec47ea8a82677c7f6337b7/clipboard.png [font =宋体]The code is as follows: [table=98%,inherit] [ tr=inherit][td]

void Sct_Pwm_Init(uint32_t PWM_RATE)

{

/* Initialize the SCT as PWM and set frequency */

Chip_SCTPWM_Init(LPC_SCT);

Chip_SCTPWM_SetRate(LPC_SCT,PWM_RATE);

/* Setup Board specific output pin */[/ backcolor]

Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 9, IOCON_FUNC2 | IOCON_MODE_INACT | IOCON_DIGITAL_EN | IOCON_INPFILT_OFF);

/* Use SCT0_OUT1 pin */

Chip_SCTPWM_SetOutPin(LPC_SCT, SCT_PWM_OUT, SCT_PWM_PIN_OUT);

/* Start with 0% duty cycle */[ /backcolor]

Chip_SCTPWM_SetDutyCycle(LPC_SCT, SCT_PWM_OUT, Chip_SCTPWM_GetTicksPerCycle(LPC_SCT) / 4);

//Chip_SCTPWM_Start(LPC_SCT);

[backcolor=inherit ]}

void IRsend_sendGREE(long datavalue ,unsigned int greeCRC) { long data = 0; long temp = 0; IRsend_enableIROut(38); IRsend_mark(GREE_HDR_MARK); IRsend_space(GREE_HDR_SPACE) ; data = (datavalue&0xffffff80)|0x0A; for (int i = 0; i < 32; i++){ if (data & TOPBIT) { IRsend_mark(GREE_BIT_MARK); IRsend_space(GREE_ONE_SPACE); } else {[/ align] IRsend_mark(GREE_BIT_MARK); IRsend_space(GREE_ZERO_SPACE); } data <<= 1; }[/ align] data = 0x02; for (int i = 0; i < 3; i++){ if (data & TOPBIT) { IRsend_mark( GREE_BIT_MARK); IRsend_space(GREE_ONE_SPACE); } else { IRsend_mark(GREE_BIT_MARK);[/align ] IRsend_space(GREE_ZERO_SPACE); } data <<= 1;[/ backcolor] } IRsend_mark(GREE_COM_MARK); IRsend_space(GREE_COM_SPACE); temp = datavalue&0x00000040;//7[/ backcolor] data = (temp>>6); data = data<<4; temp = datavalue&0x00000020;//6 data = data|(temp>>5); data =data<<5; temp = datavalue&0x00000018;//5 4 data = data|(temp>>3); data = ((data<<16)|0x1000)<<1;//3 temp = datavalue&0x00000004; [align= left] data = data|(temp>>2); data = (data<<5)|(greeCRC&0x000f); for (int i = 0; i < 32; i++){ if (data & TOPBIT) { [backcolor= inherit] IRsend_mark(GREE_BIT_MARK); IRsend_space(GREE_ONE_SPACE); } else {[/ align] IRsend_mark(GREE_BIT_MARK); IRsend_space(GREE_ZERO_SPACE); } data <<= 1; }[/ IRsend_mark(GREE_BIT_MARK); [backcolor =inherit] IRsend_space(0); }

void IRsend_mark(int time) { // Sends an IR IRsend_mark for the specified number of microseconds. // The IRsend_mark output is modulated at the PWM frequency. TIMER_ENABLE_PWM(); // Enable pin 3 PWM output [align=left ] if (time > 0) delayMicros(time); } [backcolor=inherit ]/* Leave pin off for time (given in microseconds) */ void IRsend_space(int time) { // Sends an IR IRsend_space for the specified number of microseconds. // A IRsend_space is no output, so the PWM output is disabled. TIMER_DISABLE_PWM(); // Disable pin 3 PWM output [ align=left] if (time > 0) delayMicros(time); }

From [Infrared]02. Infrared encoding and decoding - GREE remote control https ://bbs.eeworld.com.cn/thread-462015-1-1.html The decoded code Use the on/off key as the principle Close IRsend_sendGREE (0x900400,0xa); Open IRsend_sendGREE(0X10900400,0xb); Analyze and compare with data acquisition instrument LPC54102 sent out[/color ] file:///C:/Documents%20and%20Settings/Administrator/Local%20Settings/Application%20Data/YNote/data/1696933323@qq.com/25105f09d6fb4f1eb6d1452cd3f70040/clipboard.png file:///C:/Documents%20and%20Settings/Administrator/Local%20Settings/Application%20Data/YNote/data/1696933323@qq.com/13cbcd67b3f84aca9be613ffeadc10ae/clipboard.png Remote Control file:///C:/Documents%20and%20Settings/Administrator/Local%20Settings/Application%20Data/YNote/data/1696933323@qq.com/1f6cd68b1f004a78bc7af0f0451c55a5/clipboard.png Compare carefully and proofread to get the above picture. Finally, the power-on test succeeded and the switch air conditioner was turned on. In summary, the resources of LPC54102 are PWM output and timer (delay). In fact, software delay is also possible. The following figure is a non-accurate delay diagram, which can realize power on and off. If resources are not very tight or it is a beginner, it is recommended to use timer delay. The resources used are mainly LPC_SCT and LPC_TIMER2

huaiqiao

Is the frequency of Gree's infrared also 38Khz? What software did you use to decode the graphics? Can you tell me? Thank you.

dvd1478

huaiqiao posted on 2015-5-23 19:38 May I ask if the frequency of Gree's infrared is also 38Khz? What software did you use to decode the graphics? Can you tell me? Thank you.

It is 38KHZ. I can control it with 38KHZ without any problem. I use a logic analyzer. You can find it online. The usage is similar.

huaiqiao

dvd1478 posted on 2015-5-24 15:27 It is 38KHZ. I can control it with 38KHZ without any problem. I use a logic analyzer. You can find it online. The usage is similar.

Oh, OK. Got it. Thank you.

QQ15154033

Buddy, can you add me on QQ? I want to ask you about the infrared control of Gree air conditioner. QQ: 15154033

雨中

QQ15154033 posted on 2015-6-3 22:22 Buddy, can you add me on QQ? I would like to ask you about the infrared control of Gree air conditioner. QQ: 15154033

Ask directly from the above, I also want to listen{:1_137:}

dvd1478

QQ15154033 posted on 2015-6-3 22:22 Buddy, can you add me on QQ? I would like to ask you about the infrared control of Gree air conditioner. QQ: 15154033

What's the problem?

1020489646@qq.c

Hello, may I ask which models of Gree air conditioners this coding rule applies to? I am doing some related work and found that this coding rule can only control cabinet air conditioners, but not wall-mounted ones. I don't know the specific reason. It may be that the coding rules are different.

轻轻的说

have a look

koenlee93

MARK~