8k address 8192 read portb stat 64byte hid_write(&buffer, 64

[poorand_niceP]

void datashift(unsigned long value_)
{
unsigned long i;
for(i = 0x800000; i; i >>= 1)
{
if (value_ & i) DataPin = 1;
else DataPin = 0;
ClockPin = 1;
ClockPin = 0;
}
// send another clock pulse
LatchPin = 1;
LatchPin = 0;
}


void read(unsigned long addres) {

unsigned long p;
unsigned long u;
while(Hid_Write(&writebuff, 64)){
for (u=0; u<=64; u++){
for (p=0; p<=addres; p++){

datashift(p);
writebuff[p] = PORTB;


}
}
}
void main(void){
unsigned char t;

init();

/*for(t=0;t<=65535;++t){
datashift(t);
delay_us(2000);
}*/


HID_Enable(&readbuff,&writebuff); // Enable HID communication while(1){

while(!HID_Read());
switch(readbuff[0]){
case 'j': read(8192); break;

writebuff[0] = 'o';
writebuff[1] = 'k';
default: HID_Write(&writebuff,64);
}

}

any help to read 8k from portb write 64byte to reach 8192 thx

[stefan.filipovic]

Hi,

Welcome to the MikroE forum.
I'm not quite sure if I understand correctly what's your final goal with this code.
Could you please provide me with more details about that?

Kind regards,

[poorand_niceP]

i devlop with c# im learning parallel data transfer im using 74hc595 serial in parallel out for address and i use usb hid for transfer data
when i read 64byte bufferhid with c# i read 1byte from eeprom this take more time and if i read all buffer hid 64byte inside data read from eeprom go more fast thx sorry for my english
this is my fuction c# to extract 1byte from 64byte and copy them fo file this take more time.

while ((count = dev.fileStream.Read(read, 0, 65)) > 0)
{


Array.Copy(read, 1, inc, 0, 1); <== 1byte from incoming data
LogFile.Write(inc, 0, inc.Length);
//count += inc.Length;
if (LogFile.Length == total_size_in_byte)
{

LogFile.Flush();
LogFile.Close();
break;
}
//else

//{


// // textBox1.Invoke((MethodInvoker)delegate { textBox1.AppendText(Environment.NewLine + BitConverter.ToString(inc)); });

//}

}

[stefan.filipovic]

Hi,

We do not work with C#, we are working with mikroC/Basic/Pascal only, so, I'm afraid I cannot assist you in this matter.
Thank you for understanding.

Kind regards,

[poorand_niceP]

Im not talking about c# im talking about microC

[poorand_niceP]

my project is reading writing 28f400bve is 4mbit 512kb im using pic18f4550 24.474mhz
this is my code for reading :

void init(){
//INTCON2.RBPU = 1;
ADCON1 = 0x0F; // page 268, disable analaog
CMCON = 0x07; // disable comparator
INTCON2 = 0x80; // disable pull up in port b
ce_dir=0;
oe_dir=0;
we_dir=0;
TRISB = 0xFF; // set PORTB as input
DataPin_dir =0;
ClockPin_dir=0;
LatchPin_dir=0;
USB_Buffer_Clear();
delay_ms(200);
flash_ctrl_deselect();
HID_Enable(&readbuff,&writebuff); // Enable HID communication while(1){
delay_ms(2000);
ce_dir =0;//digitalWrite(15, HIGH); //CE
we_dir=0;//digitalWrite(13, HIGH); //WE
oe_dir=0;//digitalWrite(14, HIGH); //OE
USB_Buffer_Clear();
}


unsigned char readEEPROMbyte(unsigned long h) {
asm{MOVLW 0
MOVWF PORTB}
delay_us(320);
datashift(h);
delay_us(400);
data_re = PORTB;
delay_us(450);
return data_re;
delay_us(450);
}

void read_content(unsigned long add){
unsigned long base=0;
unsigned long offset;
for(base=0;base<add;base+=64)
{
for(offset=0;offset<64;offset+=1){
writebuff[offset] = readEEPROMbyte(base + offset);
}
HID_Write(&writebuff, 64);
}
}

give random wrong reading, i dont know if is delay ,any help welcome thx