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improved SPI write for display speed

This commit is contained in:
Yunhorn 2023-08-08 01:25:33 +08:00
parent c6258b5ac5
commit 557491c0c9
1 changed files with 12 additions and 1 deletions
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13
mlx90640/stm32_hx8347d_lcd.c
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@ -1276,6 +1276,7 @@ uint16_t LCD_IO_ReadData(uint16_t LCDReg){
void LCD_IO_WriteMultipleData(uint8_t *pData, uint32_t Size) void LCD_IO_WriteMultipleData(uint8_t *pData, uint32_t Size)
{ {
uint32_t counter = 0; uint32_t counter = 0;
HAL_StatusTypeDef status = HAL_OK;
/* Reset LCD control line CS */ /* Reset LCD control line CS */
LCD_CS_LOW(); LCD_CS_LOW();
@ -1291,6 +1292,15 @@ void LCD_IO_WriteMultipleData(uint8_t *pData, uint32_t Size)
} }
else else
{ {
while (Size >0) {
uint16_t chunk_size = Size > 65535 ? 65535 : Size;
HAL_SPI_Transmit(&hspi1, pData, chunk_size, HAL_MAX_DELAY);
pData += chunk_size;
Size -= chunk_size;
/* Check the communication status */
}
#if 0
/* Several data should be sent in a raw */ /* Several data should be sent in a raw */
/* Direct SPI accesses for optimization */ /* Direct SPI accesses for optimization */
for (counter = Size; counter != 0; counter--) for (counter = Size; counter != 0; counter--)
@ -1312,7 +1322,8 @@ void LCD_IO_WriteMultipleData(uint8_t *pData, uint32_t Size)
/* Wait until the bus is ready before releasing Chip select */ /* Wait until the bus is ready before releasing Chip select */
while(((hspi1.Instance->SR) & SPI_FLAG_BSY) != RESET) while(((hspi1.Instance->SR) & SPI_FLAG_BSY) != RESET)
{ {
} }
#endif
} }
/* Deselect : Chip Select high */ /* Deselect : Chip Select high */