sbit Mmc_Chip_Select at LATC0_bit; // for writing to output pin always use latch (PIC18 family)
sbit Mmc_Chip_Select_Direction at TRISC0_bit;
// eof MMC module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D7 at RB3_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D4 at RB0_bit;
// Pin direction
sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D7_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB0_bit;
// Variables for MMC routines
unsigned char SectorData[512]; // Buffer for MMC sector reading/writing
unsigned char data_for_registers[16]; // buffer for CID and CSD registers
// UART1 write text and new line (carriage return + line feed)
/*
void UART1_Write_Line(char *uart_text) {
UART1_Write_Text(uart_text);
UART1_Write(13);
UART1_Write(10);
}
*/
// Display byte in hex
void PrintHex(unsigned char i) {
unsigned char hi,lo;
hi = i & 0xF0; // High nibble
hi = hi >> 4;
hi = hi + '0';
if (hi>'9') hi=hi+7;
lo = (i & 0x0F) + '0'; // Low nibble
if (lo>'9') lo=lo+7;
// UART1_Write(hi);
// UART1_Write(lo);
}
void main() {
const char FILL_CHAR = 'm';
unsigned int i, SectorNo;
char mmc_error;
bit data_ok;
ADCON1 |= 0x0F; // Configure AN pins as digital
CMCON |= 7; // Turn off comparators
TRISB = 0;
PORTB = 0xFF;
Delay_ms(2500);
// UART1_Write_Line("PIC-Started"); // PIC present report
// Initialize SPI1 module
SPI1_Init_Advanced(_SPI_MASTER_OSC_DIV64, _SPI_DATA_SAMPLE_MIDDLE, _SPI_CLK_IDLE_LOW, _SPI_LOW_2_HIGH);
Lcd_Init(); // Initialize GLCD
Lcd_Out(1,1,"PIC-STARTED");
Delay_ms(2000);
Lcd_Cmd(_LCD_CLEAR);
// initialise a MMC card
mmc_error = Mmc_Init();
if(mmc_error == 0)
Lcd_Out(2,1,"MMC INIT OK");
else
Lcd_Out(2,1,"MMC INIT ERROR");
// Fill MMC buffer with same characters
for(i=0; i<=511; i++)
SectorData[i] = FILL_CHAR;
// Choose sector
SectorNo = 590;
// Write sector
mmc_error = Mmc_Write_Sector(SectorNo, SectorData);
if(mmc_error == 0)
// UART1_Write_Line("Write-OK");
Lcd_Out(1,1,"WRITE OK");
else // if there are errors.....
//UART1_Write_Line("Write-Error");
Lcd_Out(1,1,"Write ERROR");
Delay_ms(5000);
// Reading of CID register
mmc_error = Mmc_Read_Cid(data_for_registers);
if(mmc_error == 0) {
// UART1_Write_Text("CID : ");
Lcd_Out(2,1,"CID");
for(i=0; i<=15; i++)
PrintHex(data_for_registers[i]);
// UART1_Write_Line("");
}
else
// UART1_Write_Line("CID-error");
Lcd_Out(2,1,"CID-ERROR");
// Reading of CSD register
mmc_error = Mmc_Read_Csd(data_for_registers);
if(mmc_error == 0) {
// UART1_Write_Text("CSD : ");
Lcd_Out(1,1,"CSD: ");
for(i=0; i<=15; i++)
PrintHex(data_for_registers[i]);
// UART1_Write_Line("");
}
else
// UART1_Write_Line("CSD-error");
Lcd_Out(1,1,"CSD-error");
// Read sector
mmc_error = Mmc_Read_Sector(SectorNo, SectorData);
if(mmc_error == 0) {
//UART1_Write_Line("Read-OK");
Lcd_Out(1,1,"Read-ok");
// Chech data match
data_ok = 1;
for(i=0; i<=511; i++) {
//UART1_Write(SectorData[i]);
if (SectorData[i] != FILL_CHAR) {
data_ok = 0;
break;
}
}
//UART1_Write_Line("");
if (data_ok)
// UART1_Write_Line("Content-OK");
Lcd_Out(1,1,"Content Ok");
else
//UART1_Write_Line("Content-Error");
Lcd_Out(1,1," Content ERROR");
}
else // if there are errors.....
//UART1_Write_Line("Read-Error");
Lcd_Out(1,1,"Read Error");
// Lcd_Cmd(_LCD_CLEAR);
// Signal test end
//UART1_Write_Line("Test End.");
Delay_ms(5000);
Lcd_Out(1,1,"Test End");
}