Merge pull request #777 from pimoroni/patch-st7789-parallel-dma

Tufty 2040: DMA display update.
patch-fatfs-0.15 v1.20.2
Philip Howard 2023-05-12 14:19:31 +01:00 committed by GitHub
commit 00d1617947
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1 changed files with 6 additions and 22 deletions

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@ -240,29 +240,13 @@ namespace pimoroni {
}
void ST7789::write_blocking_parallel(const uint8_t *src, size_t len) {
const uint8_t *p = src;
while(len--) {
// Does not byte align correctly
//pio_sm_put_blocking(parallel_pio, parallel_sm, *p);
while (pio_sm_is_tx_fifo_full(parallel_pio, parallel_sm))
;
*(volatile uint8_t*)&parallel_pio->txf[parallel_sm] = *p;
p++;
}
write_blocking_dma(src, len);
dma_channel_wait_for_finish_blocking(st_dma);
uint32_t sm_stall_mask = 1u << (parallel_sm + PIO_FDEBUG_TXSTALL_LSB);
parallel_pio->fdebug = sm_stall_mask;
while (!(parallel_pio->fdebug & sm_stall_mask))
;
/*uint32_t mask = 0xff << d0;
while(len--) {
gpio_put(wr_sck, false);
uint8_t v = *src++;
gpio_put_masked(mask, v << d0);
//asm("nop;");
gpio_put(wr_sck, true);
asm("nop;");
}*/
// This may cause a race between PIO and the
// subsequent chipselect deassert for the last pixel
while(!pio_sm_is_tx_fifo_empty(parallel_pio, parallel_sm))
;
}
void ST7789::command(uint8_t command, size_t len, const char *data) {