adafruit-mirror/Adafruit_Blinka_Raspberry_Pi5_Piomatter
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WIP still wrong OE/latch situation makes a ghost but better

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This commit is contained in:
Jeff Epler 2024-12-12 15:22:00 -06:00
parent 5ddecf64f7
commit a6acc53b84
1 changed files with 5 additions and 4 deletions
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9
protodemo.c
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@ -102,7 +102,7 @@ uint8_t pixels[DOWN][ACROSS] = {
{_,w,w,_,_,w,w,_,_,w,w,_,_,w,w,_,_,w,w,_,_,w,w,_,_,w,w,_,_,w,w,_}, // 15
};
constexpr int delay_shift = 28;
constexpr int data_delay_shift = 28;
constexpr uint32_t data_delay = 1;
constexpr uint32_t clock_delay = 3;
constexpr uint32_t data_bit = 1u <<31;
@ -122,7 +122,7 @@ std::vector<uint32_t> test_pattern() {
auto do_data = [&](uint32_t d, uint32_t delay=0) {
assert(delay < 8);
result.push_back(data_bit | (delay << delay_shift) | d);
result.push_back(data_bit | (delay << data_delay_shift) | d);
};
auto do_delay = [&](uint32_t delay) {
@ -168,10 +168,11 @@ std::vector<uint32_t> test_pattern() {
add_data_word(addr_bits, r0, g0, b0, r1, g1, b1);
}
do_data(addr_bits | oe_inactive, pre_latch_delay);
do_delay(100000);
addr_bits = calc_addr_bits(addr);
do_data(addr_bits | oe_inactive, pre_latch_delay);
do_data(addr_bits | oe_inactive | lat_bit, post_latch_delay);
do_data(addr_bits | oe_inactive, post_latch_delay);
}
return result;