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DMA fixes, splitting the requests since 65535 is the max count

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mobyfab 2012-09-17 19:35:10 +02:00
parent 9921d74243
commit ac228656ae
1 changed files with 18 additions and 8 deletions
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22
drivers/gdisp/SSD1963/gdisp_lld.c
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@ -388,10 +388,15 @@ void GDISP_LLD(drawpixel)(coord_t x, coord_t y, color_t color) {
if (area > 1000) { // Do not use DMA for small areas if (area > 1000) { // Do not use DMA for small areas
dmaStreamSetPeripheral(LCD_DMA_STREAM, &color); dmaStreamSetPeripheral(LCD_DMA_STREAM, &color);
dmaStreamSetMemory0(LCD_DMA_STREAM, LCD_RAM); dmaStreamSetMemory0(LCD_DMA_STREAM, LCD_RAM);
dmaStreamSetTransactionSize(LCD_DMA_STREAM, area); uint32_t i;
uint16_t splitarea;
for (i = (area/65535)+1; i > 0; i--) {
if (i <= 1) splitarea = area%65535;
else splitarea = 65535;
dmaStreamSetTransactionSize(LCD_DMA_STREAM, splitarea);
dmaStreamSetMode(LCD_DMA_STREAM, STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_DIR_M2M | STM32_DMA_CR_EN); 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(5);
while ((LCD_DMA_STREAM)->stream->NDTR > 0) chThdSleepMilliseconds(1); }
} }
else { else {
for(index = 0; index < area; index++) for(index = 0; index < area; index++)
@ -444,10 +449,15 @@ void GDISP_LLD(drawpixel)(coord_t x, coord_t y, color_t color) {
if (area > 1000) { // Do not use DMA for small areas if (area > 1000) { // Do not use DMA for small areas
dmaStreamSetPeripheral(LCD_DMA_STREAM, buffer); dmaStreamSetPeripheral(LCD_DMA_STREAM, buffer);
dmaStreamSetMemory0(LCD_DMA_STREAM, LCD_RAM); dmaStreamSetMemory0(LCD_DMA_STREAM, LCD_RAM);
dmaStreamSetTransactionSize(LCD_DMA_STREAM, area); uint32_t i;
uint16_t splitarea;
for (i = (area/65535)+1; i > 0; i--) {
if (i <= 1) splitarea = area%65535;
else splitarea = 65535;
dmaStreamSetTransactionSize(LCD_DMA_STREAM, splitarea);
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); 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(5);
while ((LCD_DMA_STREAM)->stream->NDTR > 0) chThdSleepMilliseconds(1); }
} }
else { else {
for(; y < endy; y++, buffer += lg) for(; y < endy; y++, buffer += lg)