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Fix LCD corruption

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Fixed an issue whereby minigb_apu was being compiled even though sound
support was disabled. This was somehow causing the LCD to become
corrupted.

Additionally added sleep routines during DMA transfer to LCD.

Additionally made sound support an option within cmake.

Signed-off-by: Mahyar Koshkouei <mk@deltabeard.com>
This commit is contained in:
Mahyar Koshkouei
2022-05-21 12:42:25 +01:00
parent 71761c5dd4
commit 33e86e5a51
3 changed files with 41 additions and 13 deletions
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src/main.c
+29 -10
View File
@@ -14,11 +14,14 @@
*/
#define ENABLE_LCD 1
#define ENABLE_SOUND 0
#ifndef ENABLE_SOUND
# define ENABLE_SOUND 0
#endif
/* Use DMA for all drawing to LCD. Benefits aren't fully realised at the moment
* due to busy loops waiting for DMA completion. */
#define USE_DMA 0
#define USE_DMA 1
/**
* Reducing VSYNC calculation to lower multiple.
@@ -48,6 +51,7 @@
#include <pico/stdlib.h>
#include <pico/multicore.h>
#include <sys/unistd.h>
#include <hardware/irq.h>
/* Project headers */
#include "hedley.h"
@@ -174,6 +178,14 @@ void gb_error(struct gb_s *gb, const enum gb_error_e gb_err, const uint16_t val)
#endif
}
void core1_irq_dma_lcd_end_transfer(void)
{
mk_ili9225_write_pixels_end();
__atomic_store_n(&lcd_line_busy, 0, __ATOMIC_SEQ_CST);
//irq_clear(DMA_IRQ_0);
dma_channel_acknowledge_irq0(dma_lcd);
}
void core1_lcd_draw_line(const uint_fast8_t line)
{
const uint16_t palette[3][4] = {
@@ -196,9 +208,10 @@ void core1_lcd_draw_line(const uint_fast8_t line)
#if USE_DMA
mk_ili9225_write_pixels_start();
dma_channel_transfer_from_buffer_now(dma_lcd, &fb[0], LCD_WIDTH);
dma_channel_wait_for_finish_blocking(dma_lcd);
mk_ili9225_write_pixels_end();
__atomic_store_n(&lcd_line_busy, 0, __ATOMIC_SEQ_CST);
do {
__wfi();
} while (dma_channel_is_busy(dma_lcd));
__compiler_memory_barrier();
#else
mk_ili9225_write_pixels(fb, LCD_WIDTH);
__atomic_store_n(&lcd_line_busy, 0, __ATOMIC_SEQ_CST);
@@ -225,13 +238,19 @@ void main_core1(void)
channel_config_set_write_increment(&c2, false);
channel_config_set_ring(&c2, false, 0);
/* Enable IRQ for wake on interrupt functionality. */
irq_set_exclusive_handler(DMA_IRQ_0, core1_irq_dma_lcd_end_transfer);
dma_channel_set_irq0_enabled(dma_lcd, true);
irq_set_enabled(DMA_IRQ_0, true);
/* Clear LCD screen. */
mk_ili9225_write_pixels_start();
dma_channel_configure(dma_lcd, &c2, &spi_get_hw(spi0)->dr, &clear,
SCREEN_SIZE_X*SCREEN_SIZE_Y+16, true);
/* TODO: Add sleeping wait. */
dma_channel_wait_for_finish_blocking(dma_lcd);
mk_ili9225_write_pixels_end();
do {
__wfi();
} while (dma_channel_is_busy(dma_lcd));
__compiler_memory_barrier();
/* Set DMA transfer to be the length of a DMG line. */
dma_channel_set_trans_count(dma_lcd, LCD_WIDTH, false);
@@ -389,7 +408,7 @@ int main(void)
{
int input;
#if ENABLE_SOUND
static float stream[AUDIO_NSAMPLES];
static uint16_t stream[1098];
#endif
gb.gb_frame = 0;
@@ -401,7 +420,7 @@ int main(void)
frames++;
#if ENABLE_SOUND
audio_callback(NULL, stream, AUDIO_NSAMPLES);
audio_callback(NULL, stream, 1098);
#endif
/* Required since we do not know whether a button remains