void shiftbrite_push_image(unsigned char * img, unsigned int x, unsigned int y) {
int col, row;
// Just for clarity: col ranges from 0 to x-1, row ranges from 0 to y-1.
// These three parameters determine mirroring and rotation:
int rowDir = -1;
int colDir = -1;
int rotate90 = 0;
col = colDir > 0 ? 0 : x-1;
row = rowDir > 0 ? 0 : y-1;
while(col >= 0 && col < x) {
unsigned char * offset = img;
if (rotate90) {
offset += 3*(y*col + row);
} else {
offset += 3*(x*row + col);
}
shiftbrite_command(0, offset[0], offset[1], offset[2]);
row += rowDir;
// If we're at the end of a column, change direction (for we are
// using a zigzag pattern) and move to the next column.
if (row >= y || row < 0) {
rowDir = -rowDir;
col += colDir;
row += rowDir;
}
}
shiftbrite_delay_latch(x*y);
shiftbrite_latch();
}
void shiftbrite_delay_latch(int lights) {
//float usec = 20.0/1000 + 5.0/1000.0 * lights;
//SysCtlDelay(delay_usec * ceil(usec));
// Just screw it and delay a microsecond since we control the clock anyway
delayMicroseconds(1);
shiftbrite_latch();
}
int main()
{
ROM_SysCtlClockSet(SYSCTL_SYSDIV_4|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN);
//LEDs
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, LED_RED|LED_BLUE|LED_GREEN);
//Shifty
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTA_BASE, LATCH_PIN|ENABLE_PIN|CLOCK_PIN);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE, DATA_PIN);
port_pin D,L,E,C;
D.port = GPIO_PORTB_BASE;
D.pin = DATA_PIN;
L.port = GPIO_PORTA_BASE;
L.pin = LATCH_PIN;
E.port = GPIO_PORTA_BASE;
E.pin = ENABLE_PIN;
C.port = GPIO_PORTA_BASE;
C.pin = CLOCK_PIN;
shiftbrite_init(&sb,
D, // Data pin : 1.4
L, // Latch pin : 1.5
E, // Enable pin : 1.6
C ); // Clock pin : 1.7
//for( int i = 0; i<5; i++ )
//{
shiftbrite_configure( &sb, 120, 100, 100, CLOCK_800MHZ );
//}
// At startup, the module is disabled. Enable it.
shiftbrite_enable(&sb);
shiftbrite_latch(&sb);
for (;;) {
// set the red LED pin high, others low
//ROM_GPIOPinWrite(GPIO_PORTF_BASE, LED_RED|LED_GREEN|LED_BLUE, LED_RED|LED_BLUE);
for( int i = 0; i < 128; i++ )
{
shiftbrite_rgb( &sb, i, 0, 0 );
shiftbrite_latch( &sb );
ROM_SysCtlDelay(100000);
}
for( int i = 127; i >= 0; i-- )
{
shiftbrite_rgb( &sb, i, 0, 0 );
shiftbrite_latch( &sb );
ROM_SysCtlDelay(100000);
}
ROM_SysCtlDelay(5000000);
}
}
