Send_IR_Using_PWM_N76E003

Using PWM to generate 38KHz Pulse to send IR data in array ir_data.

uint8_t ir_data[8] = {0xAA, 0x0A, 0x48, 0xD0, 0x30, 0x22, 0x59, 0x71};

This sample code in N76E003_BSP_Keil_C51_V1.0.6/Sample_Code/SEND_IR_USING_PWM

IR Protocol

Reference: https://www.sbprojects.net/knowledge/ir/nec.php

Schematic

Using P0.3 of N76E003 as PWM5 mode.

Config PWM5

  PWM5_P03_OUTPUT_ENABLE;
  PWM_INT_PWM5;
  PWM_RISING_INT;  // PWM_FALLING_INT; //Setting Interrupt happen when PWM0
                   // falling signal

  PWM_CLOCK_DIV_4;

  PWMPH = 0x00;  //	38Khz
  PWMPL = 0x68;  //	38Khz 68 | 67 38k5

  set_SFRPAGE;  // PWM4 and PWM5 duty seting is in SFP page 1
  PWM5H = 0x0;
  PWM5L = 0x40;
  clr_SFRPAGE;

  set_EPWM;  // Enable PWM interrupt
  set_EA;
  set_LOAD;
  set_PWMRUN;

OUTPUT