Got 2 MicroVGA modules but I can't get them working with my Arduino Ethernet, well sort of. I can run the demo sketches, but keyboard input isn't working and I had to change the library this for it to give image.
// debugged 25/1/10 by Shaun Ruscoe
/*
This file implements low-level routines for Arduino MicroVGA-TEXT.The MicroVGA has to be configured for SPI mode and connected as follows:
1 GND -> Arduino GND
2 +5V -> Arduino 5V
3 +3V3 NOT CONNECTED
4 CS# -> Arduino Digital 10
5 SCK -> Arduino Digital 13
6 RDY# -> Arduino Digital 8
7 MISO -> Arduino Digital 12
8 MOSI -> Arduino Digital 11*/
#include "WProgram.h"
#include "conio.h"// Arduino Duemilanove pin definitions
#define DD_MOSI 3
#define DD_MISO 4
#define DD_SCK 5#define DDR_SPI DDRB
void SPI_MasterTransmit(char cData)
{
/* Start transmission */
//SPDR = cData;
SPDR = cData;/* Wait for transmission complete */
while ( ! (SPSR & (1<<SPIF)));}
#define KEYBUF_SIZE 10
unsigned char keybuf[KEYBUF_SIZE];
unsigned char khead, ktail;char kbhit;
int _getch()
{
int key;while (!_kbhit()) ;
key = keybuf[khead];
khead++;
khead %= KEYBUF_SIZE;if (key == 0) {
key = 0x100 | keybuf[khead];
khead++;
khead %= KEYBUF_SIZE;
}return key;
}int _kbhit()
{
if (khead == ktail)
_putch(0);if (khead == ktail)
return 0;if (keybuf[khead] == 0 && ((khead+1)%KEYBUF_SIZE) == ktail) {
_putch(0);
if (keybuf[khead] == 0 && ((khead+1)%KEYBUF_SIZE) == ktail)
return 0;
}return 1;
}void _putch(char ch)
{
unsigned char response;__builtin_avr_delay_cycles(100);
PORTB &= ~(1<<2); // PORTB2/SS#=0
__builtin_avr_delay_cycles(100);
// wait for RDY signal to go low!
while (PINB & (1<<0) ); // PB0 is RDY input
__builtin_avr_delay_cycles(100);/* Start transmission */
//SPDR = cData;
SPDR = ch;__builtin_avr_delay_cycles(100);
/* Wait for transmission complete */
while ( ! (SPSR & (1<<SPIF)));
__builtin_avr_delay_cycles(100);response = SPDR;
if (response != 0xFF) {
keybuf[ktail] = response;
ktail++;
ktail %= KEYBUF_SIZE;
kbhit = 1;
}__builtin_avr_delay_cycles(100);
PORTB |= (1<<2); // PORTB2/SS#=0
}void microvga_init()
{
kbhit = 0;
khead = 0;
ktail = 0;/* Set MOSI and SCK output all others input
This agrees to AVR151 Table 1 also */DDRB = (1<<DD_MOSI) | (1<<DD_SCK) | (1<<PINB2);
DDRB &= ~(1<<0); // PB0 is RDY input
DDRB &= ~(1<<DD_MISO); // MISO is always input/* Enable SPI, Master, set clock rate fck/16 */
SPCR = (1<<SPE) | (1<<MSTR) | (1<<SPR0) | (1<<CPHA);}
Now on the Arduino Ethernet pin 10 = ETHCS maybe this has something to do with it, I've tried changing it to pin 9 but no result, I probably didn't get it right.
