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STM32F103C8 using SPI2

hamo
Senior

Hello,

i am trying to interface 1.8 inch SPI TFT Display 128 x 160 to the STM32F103C8 using SPI2.

https://www.az-delivery.de/products/1-8-zoll-spi-tft-display

SPI1 is used for LoRa, i thought to connect TFT too to SPI1 using addresses but i am affraid to influence the

LoRa.

The library which i am using is from this website:
https://controllerstech.com/st7735-1-8-tft-display-with-stm32/

A year earlier i tried to interface LoRa to STM32F103C8 using SPI2 but without success.

Is it a general problem in STM32F103C8 using SPI2?

Any help is appreciated.

65 REPLIES 65

What you write, to send on SPI ?

 

If you feel a post has answered your question, please click "Accept as Solution".
hamo
Senior

Here is my main code:

 

#include "main.h" #include "spi.h" #include "gpio.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include <string.h> #include "st7735.h" #include "GFX_FUNCTIONS.h" #include "fonts.h" /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables ---------------------------------------------------------*/ /* USER CODE BEGIN PV */ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ /* USER CODE END 0 */ /** * @brief The application entry point. * @retval int */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_SPI2_Init(); /* USER CODE BEGIN 2 */ ST7735_Init(); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ ST7735_FillScreen(ST7735_BLACK); ST7735_WriteString(3*18, 10, "Hello", Font_7x10, ST7735_RED, ST7735_BLACK); ST7735_WriteString(5, 3*10, "from", Font_11x18, ST7735_GREEN, ST7735_BLACK); ST7735_WriteString(0, 3*10+3*10, "Kurdistan", Font_16x26, ST7735_YELLOW, ST7735_BLACK); HAL_Delay(3000); ST7735_FillScreen(ST7735_BLACK); drawCircle(50, 55, 20, ST7735_GREEN); drawCircle(50, 55, 21, ST7735_GREEN); drawCircle(50, 55, 22, ST7735_GREEN); drawCircle(50, 55, 23, ST7735_GREEN); drawCircle(50, 55, 24, ST7735_GREEN); drawCircle(50, 55, 25, ST7735_RED); drawCircle(50, 55, 26, ST7735_RED); drawCircle(50, 55, 27, ST7735_RED); drawCircle(50, 55, 28, ST7735_RED); HAL_Delay(4000); } /* USER CODE END 3 */ }
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here is the header file:

 

#ifndef __ST7735_H__ #define __ST7735_H__ #include "fonts.h" #include "stm32f1xx_hal.h" #include <stdbool.h> #define ST7735_MADCTL_MY 0x80 #define ST7735_MADCTL_MX 0x40 #define ST7735_MADCTL_MV 0x20 #define ST7735_MADCTL_ML 0x10 #define ST7735_MADCTL_RGB 0x00 #define ST7735_MADCTL_BGR 0x08 #define ST7735_MADCTL_MH 0x04 /*** Redefine if necessary ***/ #define ST7735_SPI_PORT hspi2 extern SPI_HandleTypeDef ST7735_SPI_PORT; #define ST7735_RES_Pin GPIO_PIN_10 #define ST7735_RES_GPIO_Port GPIOB #define ST7735_CS_Pin GPIO_PIN_1 #define ST7735_CS_GPIO_Port GPIOB #define ST7735_DC_Pin GPIO_PIN_0 #define ST7735_DC_GPIO_Port GPIOB //#define ST7735_SPI_PORT hspi2 //extern SPI_HandleTypeDef ST7735_SPI_PORT; // //#define ST7735_RES_Pin GPIO_PIN_2 //#define ST7735_RES_GPIO_Port GPIOA //#define ST7735_CS_Pin GPIO_PIN_4 //#define ST7735_CS_GPIO_Port GPIOA //#define ST7735_DC_Pin GPIO_PIN_3 //#define ST7735_DC_GPIO_Port GPIOA // AliExpress/eBay 1.8" display, default orientation #define ST7735_IS_160X128 1 #define ST7735_WIDTH 128 #define ST7735_HEIGHT 160 #define ST7735_XSTART 0 #define ST7735_YSTART 0 #define ST7735_ROTATION (ST7735_MADCTL_MX | ST7735_MADCTL_MY) // AliExpress/eBay 1.8" display, rotate right /* #define ST7735_IS_160X128 1 #define ST7735_WIDTH 160 #define ST7735_HEIGHT 128 #define ST7735_XSTART 0 #define ST7735_YSTART 0 #define ST7735_ROTATION (ST7735_MADCTL_MY | ST7735_MADCTL_MV) */ // AliExpress/eBay 1.8" display, rotate left /* #define ST7735_IS_160X128 1 #define ST7735_WIDTH 160 #define ST7735_HEIGHT 128 #define ST7735_XSTART 0 #define ST7735_YSTART 0 #define ST7735_ROTATION (ST7735_MADCTL_MX | ST7735_MADCTL_MV) */ // AliExpress/eBay 1.8" display, upside down /* #define ST7735_IS_160X128 1 #define ST7735_WIDTH 128 #define ST7735_HEIGHT 160 #define ST7735_XSTART 0 #define ST7735_YSTART 0 #define ST7735_ROTATION (0) */ // WaveShare ST7735S-based 1.8" display, default orientation /* #define ST7735_IS_160X128 1 #define ST7735_WIDTH 128 #define ST7735_HEIGHT 160 #define ST7735_XSTART 2 #define ST7735_YSTART 1 #define ST7735_ROTATION (ST7735_MADCTL_MX | ST7735_MADCTL_MY | ST7735_MADCTL_RGB) */ // WaveShare ST7735S-based 1.8" display, rotate right /* #define ST7735_IS_160X128 1 #define ST7735_WIDTH 160 #define ST7735_HEIGHT 128 #define ST7735_XSTART 1 #define ST7735_YSTART 2 #define ST7735_ROTATION (ST7735_MADCTL_MY | ST7735_MADCTL_MV | ST7735_MADCTL_RGB) */ // WaveShare ST7735S-based 1.8" display, rotate left /* #define ST7735_IS_160X128 1 #define ST7735_WIDTH 160 #define ST7735_HEIGHT 128 #define ST7735_XSTART 1 #define ST7735_YSTART 2 #define ST7735_ROTATION (ST7735_MADCTL_MX | ST7735_MADCTL_MV | ST7735_MADCTL_RGB) */ // WaveShare ST7735S-based 1.8" display, upside down /* #define ST7735_IS_160X128 1 #define ST7735_WIDTH 128 #define ST7735_HEIGHT 160 #define ST7735_XSTART 2 #define ST7735_YSTART 1 #define ST7735_ROTATION (ST7735_MADCTL_RGB) */ // 1.44" display, default orientation //#define ST7735_IS_128X128 1 //#define ST7735_WIDTH 128 //#define ST7735_HEIGHT 128 //#define ST7735_XSTART 2 //#define ST7735_YSTART 3 //#define ST7735_ROTATION (ST7735_MADCTL_MX | ST7735_MADCTL_MY | ST7735_MADCTL_BGR) // 1.44" display, rotate right /* #define ST7735_IS_128X128 1 #define ST7735_WIDTH 128 #define ST7735_HEIGHT 128 #define ST7735_XSTART 3 #define ST7735_YSTART 2 #define ST7735_ROTATION (ST7735_MADCTL_MY | ST7735_MADCTL_MV | ST7735_MADCTL_BGR) */ // 1.44" display, rotate left /* #define ST7735_IS_128X128 1 #define ST7735_WIDTH 128 #define ST7735_HEIGHT 128 #define ST7735_XSTART 1 #define ST7735_YSTART 2 #define ST7735_ROTATION (ST7735_MADCTL_MX | ST7735_MADCTL_MV | ST7735_MADCTL_BGR) */ // 1.44" display, upside down /* #define ST7735_IS_128X128 1 #define ST7735_WIDTH 128 #define ST7735_HEIGHT 128 #define ST7735_XSTART 2 #define ST7735_YSTART 1 #define ST7735_ROTATION (ST7735_MADCTL_BGR) */ // mini 160x80 display (it's unlikely you want the default orientation) /* #define ST7735_IS_160X80 1 #define ST7735_XSTART 26 #define ST7735_YSTART 1 #define ST7735_WIDTH 80 #define ST7735_HEIGHT 160 #define ST7735_ROTATION (ST7735_MADCTL_MX | ST7735_MADCTL_MY | ST7735_MADCTL_BGR) */ // mini 160x80, rotate left /* #define ST7735_IS_160X80 1 #define ST7735_XSTART 1 #define ST7735_YSTART 26 #define ST7735_WIDTH 160 #define ST7735_HEIGHT 80 #define ST7735_ROTATION (ST7735_MADCTL_MX | ST7735_MADCTL_MV | ST7735_MADCTL_BGR) */ // mini 160x80, rotate right /* #define ST7735_IS_160X80 1 #define ST7735_XSTART 1 #define ST7735_YSTART 26 #define ST7735_WIDTH 160 #define ST7735_HEIGHT 80 #define ST7735_ROTATION (ST7735_MADCTL_MY | ST7735_MADCTL_MV | ST7735_MADCTL_BGR) */ /****************************/ #define ST7735_NOP 0x00 #define ST7735_SWRESET 0x01 #define ST7735_RDDID 0x04 #define ST7735_RDDST 0x09 #define ST7735_SLPIN 0x10 #define ST7735_SLPOUT 0x11 #define ST7735_PTLON 0x12 #define ST7735_NORON 0x13 #define ST7735_INVOFF 0x20 #define ST7735_INVON 0x21 #define ST7735_GAMSET 0x26 #define ST7735_DISPOFF 0x28 #define ST7735_DISPON 0x29 #define ST7735_CASET 0x2A #define ST7735_RASET 0x2B #define ST7735_RAMWR 0x2C #define ST7735_RAMRD 0x2E #define ST7735_PTLAR 0x30 #define ST7735_COLMOD 0x3A #define ST7735_MADCTL 0x36 #define ST7735_FRMCTR1 0xB1 #define ST7735_FRMCTR2 0xB2 #define ST7735_FRMCTR3 0xB3 #define ST7735_INVCTR 0xB4 #define ST7735_DISSET5 0xB6 #define ST7735_PWCTR1 0xC0 #define ST7735_PWCTR2 0xC1 #define ST7735_PWCTR3 0xC2 #define ST7735_PWCTR4 0xC3 #define ST7735_PWCTR5 0xC4 #define ST7735_VMCTR1 0xC5 #define ST7735_RDID1 0xDA #define ST7735_RDID2 0xDB #define ST7735_RDID3 0xDC #define ST7735_RDID4 0xDD #define ST7735_PWCTR6 0xFC #define ST7735_GMCTRP1 0xE0 #define ST7735_GMCTRN1 0xE1 // Color definitions #define ST7735_BLACK 0x0000 #define ST7735_BLUE 0x001F #define ST7735_RED 0xF800 #define ST7735_GREEN 0x07E0 #define ST7735_CYAN 0x07FF #define ST7735_MAGENTA 0xF81F #define ST7735_YELLOW 0xFFE0 #define ST7735_WHITE 0xFFFF #define ST7735_COLOR565(r, g, b) (((r & 0xF8) << 8) | ((g & 0xFC) << 3) | ((b & 0xF8) >> 3)) typedef enum { GAMMA_10 = 0x01, GAMMA_25 = 0x02, GAMMA_22 = 0x04, GAMMA_18 = 0x08 } GammaDef; #ifdef __cplusplus extern "C" { #endif // call before initializing any SPI devices void ST7735_Unselect(); void ST7735_Init(void); void ST7735_DrawPixel(uint16_t x, uint16_t y, uint16_t color); void ST7735_WriteString(uint16_t x, uint16_t y, const char* str, FontDef font, uint16_t color, uint16_t bgcolor); void ST7735_FillRectangle(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color); void ST7735_FillRectangleFast(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color); void ST7735_FillScreen(uint16_t color); void ST7735_FillScreenFast(uint16_t color); void ST7735_DrawImage(uint16_t x, uint16_t y, uint16_t w, uint16_t h, const uint16_t* data); void ST7735_InvertColors(bool invert); void ST7735_SetGamma(GammaDef gamma); #ifdef __cplusplus } #endif #endif // __ST7735_H__
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hamo
Senior

The source file:

#include "stm32f1xx_hal.h" #include "st7735.h" //#include "malloc.h" #include "string.h" #define DELAY 0x80 // based on Adafruit ST7735 library for Arduino static const uint8_t init_cmds1[] = { // Init for 7735R, part 1 (red or green tab) 15, // 15 commands in list: ST7735_SWRESET, DELAY, // 1: Software reset, 0 args, w/delay 150, // 150 ms delay ST7735_SLPOUT , DELAY, // 2: Out of sleep mode, 0 args, w/delay 255, // 500 ms delay ST7735_FRMCTR1, 3 , // 3: Frame rate ctrl - normal mode, 3 args: 0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D) ST7735_FRMCTR2, 3 , // 4: Frame rate control - idle mode, 3 args: 0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D) ST7735_FRMCTR3, 6 , // 5: Frame rate ctrl - partial mode, 6 args: 0x01, 0x2C, 0x2D, // Dot inversion mode 0x01, 0x2C, 0x2D, // Line inversion mode ST7735_INVCTR , 1 , // 6: Display inversion ctrl, 1 arg, no delay: 0x07, // No inversion ST7735_PWCTR1 , 3 , // 7: Power control, 3 args, no delay: 0xA2, 0x02, // -4.6V 0x84, // AUTO mode ST7735_PWCTR2 , 1 , // 8: Power control, 1 arg, no delay: 0xC5, // VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD ST7735_PWCTR3 , 2 , // 9: Power control, 2 args, no delay: 0x0A, // Opamp current small 0x00, // Boost frequency ST7735_PWCTR4 , 2 , // 10: Power control, 2 args, no delay: 0x8A, // BCLK/2, Opamp current small & Medium low 0x2A, ST7735_PWCTR5 , 2 , // 11: Power control, 2 args, no delay: 0x8A, 0xEE, ST7735_VMCTR1 , 1 , // 12: Power control, 1 arg, no delay: 0x0E, ST7735_INVOFF , 0 , // 13: Don't invert display, no args, no delay ST7735_MADCTL , 1 , // 14: Memory access control (directions), 1 arg: ST7735_ROTATION, // row addr/col addr, bottom to top refresh ST7735_COLMOD , 1 , // 15: set color mode, 1 arg, no delay: 0x05 }, // 16-bit color #if (defined(ST7735_IS_128X128) || defined(ST7735_IS_160X128)) init_cmds2[] = { // Init for 7735R, part 2 (1.44" display) 2, // 2 commands in list: ST7735_CASET , 4 , // 1: Column addr set, 4 args, no delay: 0x00, 0x00, // XSTART = 0 0x00, 0x7F, // XEND = 127 ST7735_RASET , 4 , // 2: Row addr set, 4 args, no delay: 0x00, 0x00, // XSTART = 0 0x00, 0x7F }, // XEND = 127 #endif // ST7735_IS_128X128 #ifdef ST7735_IS_160X80 init_cmds2[] = { // Init for 7735S, part 2 (160x80 display) 3, // 3 commands in list: ST7735_CASET , 4 , // 1: Column addr set, 4 args, no delay: 0x00, 0x00, // XSTART = 0 0x00, 0x4F, // XEND = 79 ST7735_RASET , 4 , // 2: Row addr set, 4 args, no delay: 0x00, 0x00, // XSTART = 0 0x00, 0x9F , // XEND = 159 ST7735_INVON, 0 }, // 3: Invert colors #endif init_cmds3[] = { // Init for 7735R, part 3 (red or green tab) 4, // 4 commands in list: ST7735_GMCTRP1, 16 , // 1: Gamma Adjustments (pos. polarity), 16 args, no delay: 0x02, 0x1c, 0x07, 0x12, 0x37, 0x32, 0x29, 0x2d, 0x29, 0x25, 0x2B, 0x39, 0x00, 0x01, 0x03, 0x10, ST7735_GMCTRN1, 16 , // 2: Gamma Adjustments (neg. polarity), 16 args, no delay: 0x03, 0x1d, 0x07, 0x06, 0x2E, 0x2C, 0x29, 0x2D, 0x2E, 0x2E, 0x37, 0x3F, 0x00, 0x00, 0x02, 0x10, ST7735_NORON , DELAY, // 3: Normal display on, no args, w/delay 10, // 10 ms delay ST7735_DISPON , DELAY, // 4: Main screen turn on, no args w/delay 100 }; // 100 ms delay static void ST7735_Select() { HAL_GPIO_WritePin(ST7735_CS_GPIO_Port, ST7735_CS_Pin, GPIO_PIN_RESET); } void ST7735_Unselect() { HAL_GPIO_WritePin(ST7735_CS_GPIO_Port, ST7735_CS_Pin, GPIO_PIN_SET); } static void ST7735_Reset() { HAL_GPIO_WritePin(ST7735_RES_GPIO_Port, ST7735_RES_Pin, GPIO_PIN_RESET); HAL_Delay(5); HAL_GPIO_WritePin(ST7735_RES_GPIO_Port, ST7735_RES_Pin, GPIO_PIN_SET); } static void ST7735_WriteCommand(uint8_t cmd) { HAL_GPIO_WritePin(ST7735_DC_GPIO_Port, ST7735_DC_Pin, GPIO_PIN_RESET); HAL_SPI_Transmit(&ST7735_SPI_PORT, &cmd, sizeof(cmd), HAL_MAX_DELAY); } static void ST7735_WriteData(uint8_t* buff, size_t buff_size) { HAL_GPIO_WritePin(ST7735_DC_GPIO_Port, ST7735_DC_Pin, GPIO_PIN_SET); HAL_SPI_Transmit(&ST7735_SPI_PORT, buff, buff_size, HAL_MAX_DELAY); } static void ST7735_ExecuteCommandList(const uint8_t *addr) { uint8_t numCommands, numArgs; uint16_t ms; numCommands = *addr++; while(numCommands--) { uint8_t cmd = *addr++; ST7735_WriteCommand(cmd); numArgs = *addr++; // If high bit set, delay follows args ms = numArgs & DELAY; numArgs &= ~DELAY; if(numArgs) { ST7735_WriteData((uint8_t*)addr, numArgs); addr += numArgs; } if(ms) { ms = *addr++; if(ms == 255) ms = 500; HAL_Delay(ms); } } } static void ST7735_SetAddressWindow(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1) { // column address set ST7735_WriteCommand(ST7735_CASET); uint8_t data[] = { 0x00, x0 + ST7735_XSTART, 0x00, x1 + ST7735_XSTART }; ST7735_WriteData(data, sizeof(data)); // row address set ST7735_WriteCommand(ST7735_RASET); data[1] = y0 + ST7735_YSTART; data[3] = y1 + ST7735_YSTART; ST7735_WriteData(data, sizeof(data)); // write to RAM ST7735_WriteCommand(ST7735_RAMWR); } void ST7735_Init() { ST7735_Select(); HAL_Delay(100); ST7735_Reset(); HAL_Delay(100); ST7735_ExecuteCommandList(init_cmds1); HAL_Delay(100); ST7735_ExecuteCommandList(init_cmds2); HAL_Delay(100); ST7735_ExecuteCommandList(init_cmds3); HAL_Delay(100); ST7735_Unselect(); } void ST7735_DrawPixel(uint16_t x, uint16_t y, uint16_t color) { if((x >= ST7735_WIDTH) || (y >= ST7735_HEIGHT)) return; ST7735_Select(); ST7735_SetAddressWindow(x, y, x+1, y+1); uint8_t data[] = { color >> 8, color & 0xFF }; ST7735_WriteData(data, sizeof(data)); ST7735_Unselect(); } static void ST7735_WriteChar(uint16_t x, uint16_t y, char ch, FontDef font, uint16_t color, uint16_t bgcolor) { uint32_t i, b, j; ST7735_SetAddressWindow(x, y, x+font.width-1, y+font.height-1); for(i = 0; i < font.height; i++) { b = font.data[(ch - 32) * font.height + i]; for(j = 0; j < font.width; j++) { if((b << j) & 0x8000) { uint8_t data[] = { color >> 8, color & 0xFF }; ST7735_WriteData(data, sizeof(data)); } else { uint8_t data[] = { bgcolor >> 8, bgcolor & 0xFF }; ST7735_WriteData(data, sizeof(data)); } } } } /* Simpler (and probably slower) implementation: static void ST7735_WriteChar(uint16_t x, uint16_t y, char ch, FontDef font, uint16_t color) { uint32_t i, b, j; for(i = 0; i < font.height; i++) { b = font.data[(ch - 32) * font.height + i]; for(j = 0; j < font.width; j++) { if((b << j) & 0x8000) { ST7735_DrawPixel(x + j, y + i, color); } } } } */ void ST7735_WriteString(uint16_t x, uint16_t y, const char* str, FontDef font, uint16_t color, uint16_t bgcolor) { ST7735_Select(); while(*str) { if(x + font.width >= ST7735_WIDTH) { x = 0; y += font.height; if(y + font.height >= ST7735_HEIGHT) { break; } if(*str == ' ') { // skip spaces in the beginning of the new line str++; continue; } } ST7735_WriteChar(x, y, *str, font, color, bgcolor); x += font.width; str++; } ST7735_Unselect(); } void ST7735_FillRectangle(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color) { // clipping if((x >= ST7735_WIDTH) || (y >= ST7735_HEIGHT)) return; if((x + w - 1) >= ST7735_WIDTH) w = ST7735_WIDTH - x; if((y + h - 1) >= ST7735_HEIGHT) h = ST7735_HEIGHT - y; ST7735_Select(); ST7735_SetAddressWindow(x, y, x+w-1, y+h-1); uint8_t data[] = { color >> 8, color & 0xFF }; HAL_GPIO_WritePin(ST7735_DC_GPIO_Port, ST7735_DC_Pin, GPIO_PIN_SET); for(y = h; y > 0; y--) { for(x = w; x > 0; x--) { HAL_SPI_Transmit(&ST7735_SPI_PORT, data, sizeof(data), HAL_MAX_DELAY); } } ST7735_Unselect(); } //void ST7735_FillRectangleFast(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color) { // // clipping // if((x >= ST7735_WIDTH) || (y >= ST7735_HEIGHT)) return; // if((x + w - 1) >= ST7735_WIDTH) w = ST7735_WIDTH - x; // if((y + h - 1) >= ST7735_HEIGHT) h = ST7735_HEIGHT - y; // ST7735_Select(); // ST7735_SetAddressWindow(x, y, x+w-1, y+h-1); // // Prepare whole line in a single buffer // uint8_t pixel[] = { color >> 8, color & 0xFF }; // uint8_t *line = malloc(w * sizeof(pixel)); // for(x = 0; x < w; ++x) // memcpy(line + x * sizeof(pixel), pixel, sizeof(pixel)); // HAL_GPIO_WritePin(ST7735_DC_GPIO_Port, ST7735_DC_Pin, GPIO_PIN_SET); // for(y = h; y > 0; y--) // HAL_SPI_Transmit(&ST7735_SPI_PORT, line, w * sizeof(pixel), HAL_MAX_DELAY); // free(line); // ST7735_Unselect(); //} void ST7735_FillScreen(uint16_t color) { ST7735_FillRectangle(0, 0, ST7735_WIDTH, ST7735_HEIGHT, color); } //void ST7735_FillScreenFast(uint16_t color) { // ST7735_FillRectangleFast(0, 0, ST7735_WIDTH, ST7735_HEIGHT, color); //} void ST7735_DrawImage(uint16_t x, uint16_t y, uint16_t w, uint16_t h, const uint16_t* data) { if((x >= ST7735_WIDTH) || (y >= ST7735_HEIGHT)) return; if((x + w - 1) >= ST7735_WIDTH) return; if((y + h - 1) >= ST7735_HEIGHT) return; ST7735_Select(); ST7735_SetAddressWindow(x, y, x+w-1, y+h-1); ST7735_WriteData((uint8_t*)data, sizeof(uint16_t)*w*h); ST7735_Unselect(); } void ST7735_InvertColors(bool invert) { ST7735_Select(); ST7735_WriteCommand(invert ? ST7735_INVON : ST7735_INVOFF); ST7735_Unselect(); } //void ST7735_SetGamma(uint8_t gamma) //{ // ST7735_Select(); // ST7735_WriteCommand(ST7735_GAMSET); // ST7735_WriteData(&gamma, sizeof(gamma)); // ST7735_Unselect(); //}
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The library is using HAL_SPI_Transmit().

hamo
Senior

@AScha.3 

can you share your code?

>can you share your code?

Yes - but will not help you. Its for H743 cpu.

You have to understand: howto get it working for you - and your actual cpu.

The "driver" has 3 parts:

- some graphic routines , to draw circles etc.

- basic graphic : mainly "drew pixel" and "draw rectangle" -- to put anything in color to the TFT

- hardware access : what/how to write to the tft-chip

--------------------------

what you have to do : modify/adapt the hardware access, to what you have !

Then it should work...

 

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hamo
Senior

The clock pin isn't toggling.

Not only that, the CS pin ist changing his state too, neither do MOSI so i think it may be a setting problem.

I have changed the bluepill ( tried 3 bluepills).

Come on - CS  You have to set . in software. no NSS . not working on F103 !!!!

Read the rm. 

If you dont know, how to do ... look on git :

https://github.com/search?q=st7735+stm32f103&type=repositories

 

 

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hamo
Senior

It stucks in the initilizing function of the ST7735.

I saw an example in the link you provided and is the same by me.

CS is set:


 

ST7735_Unselect(); HAL_Delay(100); ST7735_Select(); HAL_Delay(100); ST7735_Reset(); HAL_Delay(100); ST7735_ExecuteCommandList(init_cmds1);​

 

Where:

 

static void ST7735_Select() { HAL_GPIO_WritePin(ST7735_CS_GPIO_Port, ST7735_CS_Pin, GPIO_PIN_RESET); } void ST7735_Unselect() { HAL_GPIO_WritePin(ST7735_CS_GPIO_Port, ST7735_CS_Pin, GPIO_PIN_SET); } static void ST7735_Reset() { HAL_GPIO_WritePin(ST7735_RES_GPIO_Port, ST7735_RES_Pin, GPIO_PIN_SET); HAL_Delay(5); HAL_GPIO_WritePin(ST7735_RES_GPIO_Port, ST7735_RES_Pin, GPIO_PIN_RESET); HAL_Delay(5); HAL_GPIO_WritePin(ST7735_RES_GPIO_Port, ST7735_RES_Pin, GPIO_PIN_SET); }

 

So CS is set before sending command or data

 

 

Thats wrong.

Try:

ST7735_Reset(); HAL_Delay(150); ST7735_Select(); ST7735_ExecuteCommandList(init_cmds1);

1. reset

2. delay....(chip needs time to start, i have 150ms) 

3. cs low + write init sequence...

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hamo
Senior

I have tried that, no.

Idk why but there is no clock and without clock it will not work.