jepler/pi5-pio-protomatter
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finish getting triple buffering working. try to blank display at exit (doesn't work)

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Jeff Epler 2025-01-14 09:35:52 -06:00
parent 2b9f9269cb
commit 11301998db
2 changed files with 23 additions and 6 deletions
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2
Makefile
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@ -1,5 +1,5 @@
protodemo: protodemo.c piolib/*.c include/piomatter/*.h include/piomatter/protomatter.pio.h Makefile
g++ -std=c++20 -O0 -ggdb -x c++ -Iinclude -Ipiolib/include -o $@ $(filter %.c, $^) -Wno-narrowing
g++ -std=c++20 -O3 -ggdb -x c++ -Iinclude -Ipiolib/include -o $@ $(filter %.c, $^) -Wno-narrowing
matrixmap.h:

27
include/piomatter/piomatter.h
View file

@ -12,7 +12,7 @@
namespace piomatter {
constexpr size_t MAX_XFER = 32768;
constexpr size_t MAX_XFER = 65532;
void pio_sm_xfer_data_large(PIO pio, int sm, int direction, size_t size, uint32_t *databuf) {
while(size) {
@ -52,6 +52,17 @@ struct piomatter : piomatter_base {
~piomatter() {
if (pio != NULL && sm >= 0) {
pin_deinit_one(pinout::PIN_OE);
pin_deinit_one(pinout::PIN_CLK);
pin_deinit_one(pinout::PIN_LAT);
for(const auto p : pinout::PIN_RGB)
pin_deinit_one(p);
for(size_t i=0; i<geometry.n_addr_lines; i++) {
pin_deinit_one(pinout::PIN_ADDR[i]);
}
pio_sm_unclaim(pio, sm);
}
@ -64,7 +75,6 @@ private:
void program_init() {
pio = pio0;
sm = pio_claim_unused_sm(pio, true);
printf("pio@%p sm%d\n", pio, sm);
if (sm < 0) {
throw std::runtime_error("pio_claim_unused_sm");
}
@ -113,19 +123,26 @@ printf("pio@%p sm%d\n", pio, sm);
pio_sm_set_consecutive_pindirs(pio, sm, pin, 1, true);
}
void pin_deinit_one(int pin) {
pio_gpio_init(pio, pin);
pio_sm_set_consecutive_pindirs(pio, sm, pin, 1, false);
}
void blit_thread() {
const uint32_t *databuf = nullptr;
size_t datasize = 0;
int old_buffer_idx = buffer_manager::no_buffer;
int buffer_idx;
while((buffer_idx = manager.get_filled_buffer()) != buffer_manager::exit_request) {
printf("buffer_idx=%d\n", buffer_idx);
if(buffer_idx != buffer_manager::no_buffer) {
const auto &buffer = buffers[buffer_idx];
databuf = &buffer[0];
datasize = buffer.size() * sizeof(*databuf);
if (old_buffer_idx != buffer_manager::no_buffer) {
manager.put_free_buffer(old_buffer_idx);
}
old_buffer_idx = buffer_idx;
}
printf("datasize=%zu\n", datasize);
if (datasize) {
pio_sm_xfer_data_large(pio, sm, PIO_DIR_TO_SM, datasize, (uint32_t*)databuf);
} else {