Doesn't work STM32F103 + ST7735

[petrd]

Display initialization does not work in this configuration. The problem is only in this HW configuration and in the TFT_eSPI library. Everything works when I using the Adafruit_ST7735 library. If I replace the STM32F103 with the RB2040, the display with the TFT_eSPI library also works.

Configuration: BluePill 32F103C8 + ST7735 0.96 SPI1, RST = PA2, DC = PA3, CS = PA4

SW: Arduino 1.8.19 STM32 MCU based board 2.7.1 TFT_eSPI 2.5.34

Setup:

#define STM32
#define ST7735_DRIVER
#define ST7735_GREENTAB160x80
#define TFT_WIDTH  80
#define TFT_HEIGHT 160
#define TFT_INVERSION_ON
#define TFT_SPI_PORT 1
#define TFT_RST       PA2 // PA2 ADC2 12
#define TFT_DC        PA3 // PA3 ADC3 13
#define TFT_CS        PA4 // NC PA4 ADC4 14 NSS1
#define TFT_MOSI      PA7 // PA7 ADC7 17 MOSI1 Data out

#define LOAD_GLCD   // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
#define LOAD_FONT2  // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
#define LOAD_FONT4  // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
#define LOAD_FONT6  // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
#define LOAD_FONT7  // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:-.
#define LOAD_FONT8  // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
#define LOAD_GFXFF  // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts

// STM32 support for smooth fonts via program memory (FLASH) arrays
#define SMOOTH_FONT

// Assuming the processor clock is 72MHz:
//#define SPI_FREQUENCY  36000000   // 36MHz SPI clock
#define SPI_FREQUENCY  18000000   // 18MHz SPI clock
#define SPI_READ_FREQUENCY  12000000 // Reads need a slower SPI clock
#define SPI_TOUCH_FREQUENCY  2500000 // Must be very slow

Code:

#include <TFT_eSPI.h>       // Hardware-specific library

TFT_eSPI tft = TFT_eSPI();  // Invoke custom library

// Include the header files that contain the icons
#include "Alert.h"
#include "Close.h"
#include "Info.h"

long count = 0; // Loop count

void setup()
{
  Serial.begin(9600);
  tft.begin();
  tft.setRotation(1);   // landscape

  tft.fillScreen(TFT_BLUE);

  // Swap the colour byte order when rendering
  tft.setSwapBytes(true);
}

void loop()
{
  // Loop filling and clearing screen
  tft.pushImage(random(tft.width() -  infoWidth), random(tft.height() -  infoHeight),  infoWidth,  infoHeight, info);
  tft.pushImage(random(tft.width() - alertWidth), random(tft.height() - alertHeight), alertWidth, alertHeight, alert);
  tft.pushImage(random(tft.width() - closeWidth), random(tft.height() - closeHeight), alertWidth, closeHeight, closeX);

  // Clear screen after 100 x 3 = 300 icons drawn
  if (1000 == count++) {
    count = 1;
    tft.setRotation(2 * random(2)); // Rotate randomly to clear display left>right or right>left to reduce monotony!
    tft.fillScreen(TFT_BLACK);
    tft.setRotation(1);   delay(1000);
  }
   delay(250); Serial.print("Screen width: "); Serial.print(tft.width()); Serial.print(" height: "); Serial.println(tft.height());
}

Example is not useful none works.

[Bodmer]

Use STM32 MCU based board 2.6.0 or use the githun TFT_eSPI master copy version 2.5.43

It appears that breaking chages have been made to the latest STM32 board packages.

[petrd]

Combination STM32 MCU based board 2.7.1 + TFT_eSPI 2.5.43 nor a combination STM32 MCU based board 2.6.0 + TFT_eSPI 2.5.43 doesn't work. The result is the same. :-(