void shiftbrite_configure(shiftbrite *sb,
uint8_t red_correction,
uint8_t green_correction,
uint8_t blue_correction,
shiftbrite_clock clock) {
shift_zeros(sb, 5);
shift_7bit_value(sb, blue_correction);
shift_zeros(sb, 3);
shift_7bit_value(sb, red_correction);
shift_zeros(sb, 1);
switch(clock) {
case CLOCK_200MHZ:
shift_bit(sb, 1);
shift_bit(sb, 1);
break;
case CLOCK_EXTERNAL:
shift_bit(sb, 1);
shift_bit(sb, 0);
break;
case CLOCK_400MHZ:
shift_bit(sb, 0);
shift_bit(sb, 1);
break;
case CLOCK_800MHZ:
default:
shift_bit(sb, 0);
shift_bit(sb, 0);
break;
}
shift_7bit_value(sb, green_correction);
}
static inline void shift_zeros(shiftbrite* sb, uint8_t count) {
int i;
for (i = 0; i < count; i++) {
shift_bit(sb, 0);
}
}
static inline void shift_7bit_value(shiftbrite* sb, uint8_t value) {
int i;
for (i = 6; i >= 0; i--) {
shift_bit(sb, value & (1 << i));
}
}
static void write_digit(unsigned char seg, unsigned char data, unsigned char erase, unsigned char skip)
{
static const unsigned char delete_order[7]={SEG_U,SEG_UR,SEG_UL,SEG_M,SEG_OR,SEG_OL,SEG_O};
static const unsigned char set_order[7]={SEG_O,SEG_OR,SEG_UR,SEG_U,SEG_UL,SEG_OL,SEG_M};
unsigned char i;
if ((skip & SEG_ALL) != SEG_ALL)
{
SET_STROBE;
WAIT_FULL(DATA_DELAY);
// pump data
for (i=0x80; i; i>>=1)
{
shift_bit(data&i);
}
// pump address
for (i=0x80; i; i>>=1)
{
shift_bit(seg&i);
}
CLR_STROBE; // falling strobe, latch data
WAIT_HALF(DATA_DELAY);
CLR_CLK;
WAIT_HALF(DATA_DELAY);
// enable segments??
if (erase)
{
CLR_DATA;
for (i=0; i<7; i++)
{
if (skip&delete_order[i])
{
skip_bit();
}
else
{
shift_mech();
}
}
}
else
{
SET_DATA;
for (i=0; i<7; i++)
{
if (skip&set_order[i])
{
skip_bit();
}
else
{
shift_mech();
}
}
}
SET_CLK;
}
