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Testing DMA

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This commit is contained in:
mobyfab 2012-09-17 18:49:34 +02:00
parent 819c097750
commit 9921d74243
1 changed files with 41 additions and 1 deletions
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42
drivers/gdisp/SSD1963/gdisp_lld.c
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@ -184,6 +184,10 @@ bool_t GDISP_LLD(init)(void) {
/* Initialise the display */
#if defined(LCD_USE_FSMC)
#if defined(LCD_USE_DMA)
dmaStreamAllocate(LCD_DMA_STREAM, 0, NULL, NULL);
#endif //#ifdef LCD_USE_DMA
#if defined(STM32F1XX) || defined(STM32F3XX)
/* FSMC setup for F1/F3 */
@ -380,9 +384,24 @@ void GDISP_LLD(drawpixel)(coord_t x, coord_t y, color_t color) {
GDISP_LLD(setwindow)(x, y, x+cx-1, y+cy-1);
GDISP_LLD(writestreamstart)();
#if defined(LCD_USE_DMA)
if (area > 1000) { // Do not use DMA for small areas
dmaStreamSetPeripheral(LCD_DMA_STREAM, &color);
dmaStreamSetMemory0(LCD_DMA_STREAM, LCD_RAM);
dmaStreamSetTransactionSize(LCD_DMA_STREAM, area);
dmaStreamSetMode(LCD_DMA_STREAM, STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_DIR_M2M | STM32_DMA_CR_EN);
while ((LCD_DMA_STREAM)->stream->NDTR > 0) chThdSleepMilliseconds(1);
}
else {
for(index = 0; index < area; index++)
GDISP_LLD(writedata)(color);
}
#else
for(index = 0; index < area; index++)
GDISP_LLD(writedata)(color);
}
#endif //#ifdef LCD_USE_DMA
}
#endif
#if GDISP_HARDWARE_BITFILLS || defined(__DOXYGEN__)
@ -418,9 +437,30 @@ void GDISP_LLD(drawpixel)(coord_t x, coord_t y, color_t color) {
endy = y + cy;
lg = srccx - cx;
buffer += srcx + srcy * srccx;
#if defined(LCD_USE_DMA)
uint32_t area = cx*cy;
if (area > 1000) { // Do not use DMA for small areas
dmaStreamSetPeripheral(LCD_DMA_STREAM, buffer);
dmaStreamSetMemory0(LCD_DMA_STREAM, LCD_RAM);
dmaStreamSetTransactionSize(LCD_DMA_STREAM, area);
dmaStreamSetMode(LCD_DMA_STREAM, STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_PINC | STM32_DMA_CR_DIR_M2M | STM32_DMA_CR_EN);
while ((LCD_DMA_STREAM)->stream->NDTR > 0) chThdSleepMilliseconds(1);
}
else {
for(; y < endy; y++, buffer += lg)
for(x=srcx; x < endx; x++)
GDISP_LLD(writedata)(*buffer++);
}
#else
for(; y < endy; y++, buffer += lg)
for(x=srcx; x < endx; x++)
GDISP_LLD(writedata)(*buffer++);
#endif //#ifdef LCD_USE_DMA
}
#endif