From 17dedc3aa4456756e8cae1a228c7bc645cca6d78 Mon Sep 17 00:00:00 2001 From: Robin Krens Date: Wed, 18 Sep 2019 14:31:54 +0700 Subject: [PATCH] st7735s: houston, we got a letter --- drivers/st7735s.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 49 insertions(+), 4 deletions(-) diff --git a/drivers/st7735s.c b/drivers/st7735s.c index ff8a64d..8eef4f3 100644 --- a/drivers/st7735s.c +++ b/drivers/st7735s.c @@ -21,6 +21,7 @@ #include #include #include +//#include #include @@ -28,6 +29,7 @@ #define SCRWIDTH 132 #define SCRHEIGHT 132 +int tft_putc(uint16_t, uint16_t, char); void tft_init() { /* Peripherial init */ @@ -94,8 +96,9 @@ void tft_init() { /* Before turning on the display, fill the display * so no random display data is shown */ - tft_fill(0,0,SCRWIDTH-1,SCRHEIGHT-1,0x001F); - tft_setpixel(50,50,0xFFFF); + tft_fill(0,0,SCRWIDTH-1,SCRHEIGHT-1,0x0000); + //tft_setpixel(50,50,0xFFFF); + tft_putc(0xFFFF, 0x0000, 's'); /* Turn on */ tft_command(TFT_NORON, 0); @@ -179,7 +182,7 @@ int tft_setpixel(uint8_t x, uint8_t y, uint16_t color) { tft_command(TFT_CASET, 4, 0x00, x, 0x00, x+1); tft_command(TFT_RASET, 4, 0x00, y, 0x00, y+1); - tft_command(TFT_RAMWR, 2, (uint8_t) (color >> 8), (uint8_t) (color & 0xFF)); +tft_command(TFT_RAMWR, 2, (uint8_t) (color >> 8), (uint8_t) (color & 0xFF)); return 0; } @@ -188,11 +191,53 @@ int tft_setpixel(uint8_t x, uint8_t y, uint16_t color) { * the location */ int tft_putc(uint16_t fg, uint16_t bg, char c) { + //chipselect(); + // Bitmaps are 9 by 8 + uint8_t databuf[9] = {0x73, 0xFB, 0xDB, 0xDB, 0xDB, 0xDB, 0xDB, 0xDF, 0xDA}; + //uint8_t databuf[9] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; + + int totalpixels = 72; + int column, row = 0; + uint8_t current; + + tft_command(TFT_CASET, 4, 0x00, 10, 0x00, 18); + tft_command(TFT_RASET, 4, 0x00, 10, 0x00, 17); + tft_command(TFT_RAMWR, 0); + rsetbit(GPIOC_ODR, 6); // data = 1 + for (int i = 0; i < totalpixels; i++) { + + 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 > 8) { + column = 0; + row++; + } + } + return 0; // lookup table } -/* Invokes commands with a variable list of paramaters. Sending paramters +/* 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, ...) { -- 2.7.4