SquareCows

It has been a long time since I blogged about the SD card project. I have been busy, but every once in a while I was able to do some experimenting.

I was able to build the AVRLIB mmc code and mmctest program, which should work with my SD card, and load it to the Arduino using avrdude. It brings up a command line interface to test mmc functions like read, write, initialize(reset). It seems to interface fine to the SD card, but I keep getting an error back in the status register. The error code is a 0×5. I did some research on the error, but haven’t figured out exactly what is happening.

For now, I have put the SD project on hold.

I am now connecting up the TSOP32238 and getting data from my remotes into the PC and hopefully LIRC. The output of the TSOP32238 is a stream of 1’s and 0’s. I think LIRC expects pulse lengths in hex, so I have some code to write.

I borrowed walter anderson’s code to look at what the TSOP32238 is seeing…. I am getting some false pulses probably because I hooked the TSOP directly to the input pin instead of using the recommended cap and resistor.

/* *  File....... IRanalyzer.pde  *  Purpose.... Records up to 128 signal changes *  Author..... Walter Anderson  *  E-mail..... wand...@walteranderson.us  *  Started.... 18 May 2007  *  Updated.... 18 May 2007  *  * */#include <avr/interrupt.h>#include <avr/io.h>

#define TIMER_RESET  TCNT1 = 0#define SAMPLE_SIZE  64

int IRpin = 2;unsigned int TimerValue[SAMPLE_SIZE];char direction[SAMPLE_SIZE];byte change_count;long time;

void setup() {  Serial.begin(115200);  Serial.println("Analyze IR Remote");  TCCR1A = 0x00;          // COM1A1=0, COM1A0=0 => Disconnect Pin OC1 from Timer/Counter 1 -- PWM11=0,PWM10=0 => PWM Operation disabled  // ICNC1=0 => Capture Noise Canceler disabled -- ICES1=0 => Input Capture Edge Select (not used) -- CTC1=0 => Clear Timer/Counter 1 o  //Compare/Match  // CS12=0 CS11=1 CS10=1 => Set prescaler to clock/64  TCCR1B = 0x03;          // 16MHz clock with prescaler means TCNT1 increments every 4uS  // ICIE1=0 => Timer/Counter 1, Input Capture Interrupt Enable -- OCIE1A=0 => Output Compare A Match Interrupt Enable -- OCIE1B=0 => O  //tput Compare B Match Interrupt Enable  // TOIE1=0 => Timer 1 Overflow Interrupt Enable  TIMSK1 = 0x00;            pinMode(IRpin, INPUT);}

void loop(){  Serial.println("Waiting...");  change_count = 0;  while(digitalRead(IRpin) == HIGH) {  }                                   TIMER_RESET;  TimerValue[change_count] = TCNT1;  direction[change_count++] = '0';  while (change_count < SAMPLE_SIZE) {    if (direction[change_count-1] == '0') {      while(digitalRead(IRpin) == LOW) {      }      TimerValue[change_count] = TCNT1;      direction[change_count++] = '1';    }     else {      while(digitalRead(IRpin) == HIGH) {      }      TimerValue[change_count] = TCNT1;      direction[change_count++] = '0';    }  }  Serial.println("Bit stream detected!");  change_count = 0;  time = (long) TimerValue[change_count] * 4;  Serial.print(time);  Serial.print("\t");  Serial.println(direction[change_count++]);  while (change_count < SAMPLE_SIZE) {    time = (long) TimerValue[change_count] * 4;    Serial.print(time);    Serial.print("\t");    Serial.println(direction[change_count-1]);    Serial.print(time);    Serial.print("\t");    Serial.println(direction[change_count++]);      }  Serial.println("Bit stream end!");  delay(2000);}