jepler/pi5-pio-protomatter
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swap order of lines & planes

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This commit is contained in:
Jeff Epler 2024-12-15 12:23:46 -06:00
parent 01cf4cc6ed
commit b9ec9c2141
1 changed files with 11 additions and 9 deletions
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20
protodemo.c
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@ -223,22 +223,21 @@ pixels[i][2*i] = rgb(255,0,0);
int last_bit = 0;
int prev_addr = 7;
#define N_PLANES 8
#define N_PLANES 10
#define N_BITS 10
#define OFFSET (N_BITS - N_PLANES)
for(int bit = N_PLANES - 1; bit >= 0; bit--) {
uint32_t r = 1 << (20 + OFFSET + bit);
uint32_t g = 1 << (10 + OFFSET + bit);
uint32_t b = 1 << (0 + OFFSET + bit);
for(int addr = 0; addr < 8; addr++) {
for(int bit = N_PLANES - 1; bit >= 0; bit--) {
uint32_t r = 1 << (20 + OFFSET + bit);
uint32_t g = 1 << (10 + OFFSET + bit);
uint32_t b = 1 << (0 + OFFSET + bit);
for(int addr = 0; addr < 8; addr++) {
// the shortest /OE we can do is one DATA_OVERHEAD...
uint32_t desired_duration = 1 << last_bit;
last_bit = bit;
// illuminate the right row for data in the shift register (the previous address)
uint32_t addr_bits = calc_addr_bits(prev_addr);
prev_addr = addr;
prep_data(2 * ACROSS);
for(int across = 0; across < ACROSS; across++) {
@ -263,8 +262,11 @@ pixels[i][2*i] = rgb(255,0,0);
do_data_delay(addr_bits | oe_inactive | lat_bit, post_latch_delay);
// with oe inactive, set address bits to illuminate THIS line
addr_bits = calc_addr_bits(addr);
do_data_delay(addr_bits | oe_inactive, post_addr_delay);
if (addr != prev_addr) {
addr_bits = calc_addr_bits(addr);
do_data_delay(addr_bits | oe_inactive, post_addr_delay);
prev_addr = addr;
}
}
}