Open
Description
Board
ESP32-S3
Device Description
ESP32 series products
Hardware Configuration
Run the screen and the SD card simultaneously on one SPI
Version
latest stable Release (if not listed below)
IDE Name
Arduino IDE
Operating System
Windows 10
Flash frequency
80MHz
PSRAM enabled
yes
Upload speed
115200
Description
The underlying SD interface calls are all non-locking. Running both the screen and the SD card on the same SPI bus can only be managed with mutex-like operations at the upper program level. However, doing so at the upper level causes the screen to freeze when reading or writing to the SD card. Will this be optimized in the future? This is because SD mainly uses official libraries, and if locks are not provided, controlling this at the upper level is not very user-friendly.
Sketch
#define SPI_WRITE(_dat) SPI.transfer(_dat)
#define SPI_WRITE_Word(_dat) SPI.transfer16(_dat)
void SPI_Init()
{
SPI.begin(EXAMPLE_PIN_NUM_SCLK,EXAMPLE_PIN_NUM_MISO,EXAMPLE_PIN_NUM_MOSI);
}
void LCD_WriteCommand(uint8_t Cmd)
{
SPI.beginTransaction(SPISettings(SPIFreq, MSBFIRST, SPI_MODE0));
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, LOW);
digitalWrite(EXAMPLE_PIN_NUM_LCD_DC, LOW);
SPI_WRITE(Cmd);
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
SPI.endTransaction();
}
void LCD_WriteData(uint8_t Data)
{
SPI.beginTransaction(SPISettings(SPIFreq, MSBFIRST, SPI_MODE0));
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, LOW);
digitalWrite(EXAMPLE_PIN_NUM_LCD_DC, HIGH);
SPI_WRITE(Data);
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
SPI.endTransaction();
}
void LCD_WriteData_Word(uint16_t Data)
{
SPI.beginTransaction(SPISettings(SPIFreq, MSBFIRST, SPI_MODE0));
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, LOW);
digitalWrite(EXAMPLE_PIN_NUM_LCD_DC, HIGH);
SPI_WRITE_Word(Data);
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
SPI.endTransaction();
}
if (SD.begin(SD_CS, SPI, 2000000, "/sd", 5, true)) {
printf("SD card initialization successful!\r\n");
} else {
printf("SD card initialization failed!\r\n");
}
uint8_t cardType = SD.cardType();
if(cardType == CARD_NONE){
printf("No SD card attached\r\n");
return false;
}Debug Message
NULL
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide
- I confirm I have checked existing issues, online documentation and Troubleshooting guide.