I am trying to get the Sharp LCD LS010B7DH01 working with uGFX, ChibiOS 2.6.1 and STM32L151CB. It is quite a basic display. There are no special features, and one can write lines to the memory with the following SPI bytestream. Write command byte, line address, 16 bytes of pixel data, 2 dummy bytes. http://www.avnet-embedded.eu/fileadmin/user_upload/Files/Displays/Mono/Sharp_LS010B7DH01.pdf (Datasheet) Here are relevant excerpts from gdisp_lld_*.c /*===========================================================================*/ /* Driver local definitions. */ /*===========================================================================*/ #ifndef GDISP_SCREEN_HEIGHT #define GDISP_SCREEN_HEIGHT 128 // This controller should support 32 (untested) or 64 #endif #ifndef GDISP_SCREEN_WIDTH #define GDISP_SCREEN_WIDTH 128 #endif #define LS010_LINE_WIDTH GDISP_SCREEN_WIDTH/8 #define GDISP_FLG_NEEDFLUSH (GDISP_FLG_DRIVER<<0) #include "LS010.h" /*===========================================================================*/ /* Driver local functions. */ /*===========================================================================*/ // Some common routines and macros #define RAM(g) ((uint8_t *)g->priv) // Some common routines and macros #define delay(us) gfxSleepMicroseconds(us) #define delayms(ms) gfxSleepMilliseconds(ms) #define xyaddr(x, y) (x + y * GDISP_SCREEN_WIDTH) / 8 #define xybit(x, y) (1 << ((x + y * GDISP_SCREEN_WIDTH) % 8)) /*===========================================================================*/ /* Driver exported functions. */ /*===========================================================================*/ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) { // The private area is the display surface. g->priv = gfxAlloc(2048); lcd_init(&handle_lcd); // <--- My initialisation function which successfully turns LCD on acquire_bus(g); // Finish Init post_init_board(g); // Release the bus release_bus(g); /* Initialise the GDISP structure */ g->g.Width = GDISP_SCREEN_WIDTH; g->g.Height = GDISP_SCREEN_HEIGHT; g->g.Orientation = GDISP_ROTATE_0; g->g.Powermode = powerOn; g->g.Backlight = GDISP_INITIAL_BACKLIGHT; g->g.Contrast = GDISP_INITIAL_CONTRAST; return TRUE; } #if GDISP_HARDWARE_FLUSH LLDSPEC void gdisp_lld_flush(GDisplay *g) { unsigned i; uint8_t j = 128; //Address // Don't flush if we don't need it. if (!(g->flags & GDISP_FLG_NEEDFLUSH)) return; for(i=0; i < 2048; i += LS010_LINE_WIDTH) { write_data(g, RAM(g)+i, LS010_LINE_WIDTH, j); j--; } } #endif #if GDISP_HARDWARE_DRAWPIXEL LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) { coord_t x, y; int tmpx = xyaddr(g->p.x, g->p.y); int bit = xybit(g->p.x,g->p.y); switch(g->g.Orientation) { default: case GDISP_ROTATE_0: x = g->p.x; y = g->p.y; break; case GDISP_ROTATE_90: x = g->p.y; y = GDISP_SCREEN_HEIGHT-1 - g->p.x; break; case GDISP_ROTATE_180: x = GDISP_SCREEN_WIDTH-1 - g->p.x; y = GDISP_SCREEN_HEIGHT-1 - g->p.y; break; case GDISP_ROTATE_270: x = GDISP_SCREEN_HEIGHT-1 - g->p.y; x = g->p.x; break; } if (gdispColor2Native(g->p.color) != Black) { RAM(g)[xyaddr(x, y)] &= xybit(x,y); }else { RAM(g)[xyaddr(x, y)] |= ~xybit(x,y); g->flags |= GDISP_FLG_NEEDFLUSH; } } #endif and and board_*.h static uint8_t reverse(uint8_t b) { b = (b & 0xF0) >> 4 | (b & 0x0F) << 4; b = (b & 0xCC) >> 2 | (b & 0x33) << 2; b = (b & 0xAA) >> 1 | (b & 0x55) << 1; return b; } static inline void write_data(GDisplay *g, uint8_t* data, uint16_t length, uint8_t addr) { (void) g; uint8_t tmp[20] = {0}; // Command to write + address + 16 byte pixel data + 2 dummy bytes tmp[0] = 0b10000000; // Command to write tmp[1] = reverse(addr); // LSB first memmove(tmp+2, data, 16); spiUnselect(&SPID1); chThdSleepMicroseconds(SCS_HIGH_DELAY); spiSend(&SPID1, 20, tmp); chThdSleepMicroseconds(SCS_LOW_DELAY); spiSelect(&SPID1); chThdSleepMicroseconds(INTERFRAME_DELAY); } However, I am not able to get correct output. For example, here is the output when running the 'basics' example. Can anyone see something wrong here?
