From: Robin Krens Date: Thu, 19 Sep 2019 04:32:15 +0000 (+0700) Subject: st7735s: scrolling screen X-Git-Url: https://robinkrens.nl/gitweb/?a=commitdiff_plain;h=fdc185692bbf417f3f358a7c4c9975d09ac42892;p=cortex-from-scratch st7735s: scrolling screen --- diff --git a/drivers/st7735s.c b/drivers/st7735s.c index 870ac06..f2041ce 100644 --- a/drivers/st7735s.c +++ b/drivers/st7735s.c @@ -21,17 +21,41 @@ #include #include #include -//#include +#include #include #define TIMEOUT 500 #define SCRWIDTH 132 #define SCRHEIGHT 132 - +#define STARTX 5 +#define STARTY 5 +#define XPOS(x) (x * 6) +#define YPOS(y) (y * 8) +#define BUFFER 352 + +static struct { + uint16_t cpos; + uint8_t * textmemptr; + uint8_t buf[BUFFER]; + uint8_t x; + uint8_t y; +} tftscreen; + +void tft_clrln(); +int tft_scroll(); +int tft_puts(); int tft_putc(uint16_t, uint16_t, char); +int tft_putc_small(uint16_t, uint16_t, int); void tft_init() { + tftscreen.x = 0; + tftscreen.y = 0; + tftscreen.cpos = 0; + tftscreen.textmemptr = tftscreen.buf; + + memset(tftscreen.buf, 0x00, 352); + /* Peripherial init */ rsetbit(RCC_APB1ENR, 14); // enable SPI2 rsetbit(RCC_APB2ENR, 3); // enable GPIOB @@ -98,13 +122,21 @@ void tft_init() { * so no random display data is shown */ tft_fill(0,0,SCRWIDTH-1,SCRHEIGHT-1,0x0000); //tft_setpixel(50,50,0xFFFF); - tft_putc(0xFFFF, 0x0000, 's'); + //tft_putc(0xFFFF, 0x0000, 's'); + //tft_putc_small(0xFFFF, 0x0000, 's'); + //tft_puts("root#"); + //tft_puts("f"); + + /* Turn on */ tft_command(TFT_NORON, 0); _block(10000); tft_command(TFT_DISPON, 0); _block(100000); + + tft_puts("rrrrrrrrrrrrrrrrrrrrrooooooooooooooooooooooooooooooooooooooooootttttttttttttttttttttoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooootttttttttttttttttttttoooooooooooooooooooootttttttttttttttttttttoooooooooooooooooooootttttttttttttttttttttoooooooooooooooooooootttttttttttttttttttttooooooooooooooooooooott"); + /* //_block(10000); @@ -238,6 +270,121 @@ int tft_putc(uint16_t fg, uint16_t bg, char c) { } +int tft_puts(char * str) { + + //uint8_t temp; + //char * string = "root#root#root#root#root#root#root#"; + + //printf("string length: %d\n", strlen(string)); + + //for (int i = 0; i < 35; i++) { + for (int i = 0; i < strlen(str); i++) { + + if (tftscreen.y >= 15) { + tft_scroll(); + } + + tft_command(TFT_CASET, 4, 0x00, STARTX + XPOS(tftscreen.x), 0x00, (STARTX + 4) + XPOS(tftscreen.x)); + tft_command(TFT_RASET, 4, 0x00, STARTY + YPOS(tftscreen.y), 0x00, (STARTY + 6) + YPOS(tftscreen.y)); + tft_putc_small(0xFFFF, 0x0000, str[i]); + + tftscreen.buf[tftscreen.cpos] = str[i]; + tftscreen.cpos++; + + tftscreen.x++; + if (tftscreen.x > 20) { + tftscreen.x = 0; + tftscreen.y++; + } + // if screen.y at end, "scroll" line + } + + +} + +void tft_clrln() { + + + tft_puts(" "); + tftscreen.buf[BUFFER - 21] = '\0'; + tftscreen.cpos -= 21; + //for(;;); + tftscreen.y = 14; +} + +/* Text scroll function + * Refeed the buffer */ +int tft_scroll() { + + /* Scroll the buffer */ + memcpy(tftscreen.textmemptr, tftscreen.textmemptr + 21, BUFFER - 21); + for (int i = 21; i >= 0; i--) + tftscreen.buf[BUFFER - 21] = '\0'; + + printf(tftscreen.buf); + //for(;;); + + tftscreen.x = 0; + tftscreen.y = 0; + tftscreen.cpos = 0; + + tft_puts(tftscreen.buf); // CHECK: ending + printf("screen.y %d", tftscreen.y); + tft_clrln(); +} + +int tft_putc_small(uint16_t fg, uint16_t bg, int c) { + + //chipselect(); + // Bitmaps are 5 by 7 + //uint8_t databuf[5] = {0xF6, 0x92, 0x92, 0x92, 0xDE}; + + + int totalpixels = 35; + int column = 0; + int row = 0; + uint8_t current; + + + tft_command(TFT_RAMWR, 0); + rsetbit(GPIOC_ODR, 6); // data = 1 + for (int i = 0; i < totalpixels; i++) { + + current = ASCII5x7[(c * 5) + column]; + //current = databuf[column]; + + if ((current >> (7 - row)) & 0x1) { + rwrite(SPI2_DR, (uint8_t) (fg >> 8)); + if (!txbuf_empty()) + return -1; + rwrite(SPI2_DR, (uint8_t) (fg & 0xFF)); + if (!txbuf_empty()) + return -1; + } + else { + rwrite(SPI2_DR, (uint8_t) (bg >> 8)); + if (!txbuf_empty()) + return -1; + rwrite(SPI2_DR, (uint8_t) (bg & 0xFF)); + if (!txbuf_empty()) + return -1; + } + + /* Algoritm dependent on draw mode: top down, left right */ + column++; + if (column > 4) { + column = 0; + row++; + } + } + + + return 0; + // lookup table +} + + + /* Invokes commands with a variable list of paramaters. Sending parameters * requires the D/CX line to be high */ int tft_command(uint8_t cmd, int argsc, ...) { diff --git a/sysinfo.c b/sysinfo.c index 2792f14..84d5097 100644 --- a/sysinfo.c +++ b/sysinfo.c @@ -24,7 +24,7 @@ uint32_t get_msp(void); void sysinfo() { uint32_t tmp = *MCU_ID; - printf("# DEVICE ID: "); + printf("# DEV ID: "); if (tmp & 0x414) printf("HIGH DENSITY\n"); @@ -33,7 +33,7 @@ void sysinfo() { } tmp = (tmp >> 16); - printf("# REVISION: "); + printf("# REV: "); switch (tmp) { case 0x1000: printf("REVISION A\n"); @@ -49,15 +49,15 @@ void sysinfo() { } extern char _endofbss; - + uint32_t current_stack = get_msp(); uint32_t stack_usage = (SRAM_OFFSET + SRAM_SIZE) - current_stack; uint32_t data_bss = (uint32_t) &_endofbss - SRAM_OFFSET; uint32_t mem_free = SRAM_SIZE - stack_usage - data_bss; - printf("# TOTAL MEMORY: %#x\n", SRAM_SIZE); - printf("# FREE MEMORY: %#x\n", mem_free); - printf("# STACK USAGE: %#x\n", stack_usage); + printf("# TOTAL MEM: %#x\n", SRAM_SIZE); + printf("# FREE MEM: %#x\n", mem_free); + printf("# STACK USE: %#x\n", stack_usage); }