void lcd_cmd( char cmd ) // subroutiune for lcd commands
{
while(checkBusy());
// TRISD &= 0xFF00; // ensure RD0 - RD7 are outputs
DATA &= 0xFF00; // prepare RD0 - RD7
DATA |= cmd; // command byte to lcd
RW = 0; // ensure RW is 0
RS = 0;
E = 1; // toggle E line
Nop();
Nop();
Nop();
E = 0;
}
void lcd_data( char data ) // subroutine for lcd data
{
while(checkBusy());
// TRISD &= 0xFF00; // ensure RD0 - RD7 are outputs
RW = 0; // ensure RW is 0
RS = 1; // assert register select to 1
DATA &= 0xFF00; // prepare RD0 - RD7
DATA |= data; // data byte to lcd
E = 1;
Nop();
Nop();
Nop();
E = 0; // toggle E signal
RS = 0; // negate register select to 0
}
void waitUntilNotBusy(void)
{
while(checkBusy()==1);
}
/**
* @brief Read and send EPD response
* @return Status-response
*/
LDD_TError readAndSendEPD()
{
TCM_enable();
PE_low_level_init();
// Pointer to part of an image.
uint32 ii = 0;
uint32 a = 0;
uint32 nr_block_flash = 0;
LDD_TError Result = -1;
uint32_t ImageDatatoSend = 0;
uint32_t image_shift = 0;
uint8_t fileDetected = 0;
uint32_t imageStart = 0x7000;
uint32_t controlFileStartAddress = 0;
fileDetected = findFileStartAddress(&imageStart, &controlFileStartAddress);
if(controlFileStartAddress)
{
EM_ReadData((uint8_t*) &upload_image2, controlFileStartAddress, 16);
uint32_t len = upload_image2[0];
if(len > 0)
{
tcm_drivescheme = upload_image2[1];
}
if(len > 1)
{
tcm_framebuffer_slot = upload_image2[2];
}
}
else
{
tcm_drivescheme = 0x24;
tcm_framebuffer_slot = 0;
}
display_update[0] = tcm_drivescheme;
upload_image[2] = tcm_framebuffer_slot;
display_update[2] = tcm_framebuffer_slot;
if (fileDetected == 1)
{
EM_ReadData((uint8_t*) &upload_image2, imageStart, 400);
uint16_t res_x, res_y, color_bit;
res_x = upload_image2[1] * 256 + upload_image2[2];
res_y = upload_image2[3] * 256 + upload_image2[4];
color_bit = upload_image2[5];
ImageDatatoSend = res_x * res_y / 8;
if(color_bit)
{
ImageDatatoSend *= color_bit;
}
ImageDatatoSend += 16; //image header
if (ImageDatatoSend < EM_SETUP_MEMORY_SIZE_BYTES)
{
LED_ClrVal(NULL);
nr_block_flash=0;
while(ImageDatatoSend>0)
{
EM_ReadData((uint8_t*) &upload_image2,imageStart - image_shift + (nr_block_flash * 400), 400);
for (ii = 0; ii < 4; ii++)
{
// Copying part of image.
for (a = 0; a < 100; a++)
{
upload_image[a + 4] = upload_image2[100 * ii + a];
}
// Sending image to TCM.
if(ImageDatatoSend>=100)
{
upload_image[3] = 100;
tcm_receive=TCM_ImageUpload(upload_image, 104);
ImageDatatoSend-=100;
}
else
{
upload_image[3] = ImageDatatoSend;
tcm_receive=TCM_ImageUpload(upload_image, ImageDatatoSend+4);
ImageDatatoSend=0;
}
if(tcm_receive != 0x90)
{
if((ii != 0)||(nr_block_flash != 0))
{
errorSTOP();
return Result;
}
}
if(ImageDatatoSend==0)
{
break;
}
}
nr_block_flash++;
}
}
}
else
{
//if there was no upload then give time for the TCM to start-up (upload is starting with a delay)
WAIT_Waitms(20);
}
if((USBTCM_error == 0) && (fileDetected || controlFileStartAddress))
{
WAIT_Waitms(1); //The period of this WAIT is different ~(x 0.5)
tcm_receive=TCM_DisplayUpdate();
if(tcm_receive != 0x90 && fileDetected) //check response for upload command
{
errorSTOP();
return Result;
}
WAIT_Waitms(1);
checkBusy(); // Check Busy pin to low
if(USBTCM_error!=0)
{
return Result;
}
checkBusytoHigh(); // Check Busy pin to
if(USBTCM_error!=0)
{
return Result;
}
WAIT_Waitms(2);
tcm_receive=TCM_GetAnswer();
if(tcm_receive != 0x90)
{
errorSTOP();
return Result;
}
}
possibleFile = 0;
TCM_disable();
return Result;
}