FreeCalypso > hg > freecalypso-tools
view target-utils/c139explore/lcd.c @ 407:19e5a3e2f9c0
fcup-settime: moved time() retrieval a little closer to the output
A fundamental problem with all simple time transfer tools is that there is
always some delay between the time retrieval on the source system and that
transmitted time being set on the destination, and the resulting time
on the destination system is off by that delay amount. This delay cannot
be fully eliminated when working in a simple environment like ours,
but we should make our best effort to minimize it. In the present case,
moving the atinterf_init() call before the time() retrieval should make
a teensy-tiny improvement.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 11 Aug 2018 21:52:17 +0000 |
parents | e7502631a0f9 |
children |
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#include <sys/types.h> #include "types.h" static void send_cmd_data(cmdbyte, databyte) { send_via_uwire(cmdbyte); send_via_uwire(databyte | 0x100); } void cmd_lcdcmd(argbulk) char *argbulk; { char *argv[3]; u_long cmd, data; if (parse_args(argbulk, 2, 2, argv, 0) < 0) return; if (parse_hexarg(argv[0], 2, &cmd) < 0) { printf("ERROR: arg1 must be a valid 8-bit hex value\n"); return; } if (parse_hexarg(argv[1], 2, &data) < 0) { printf("ERROR: arg2 must be a valid 8-bit hex value\n"); return; } send_cmd_data(cmd, data); } static void send_pixel_value(pix) { send_via_uwire((pix >> 8) | 0x100); send_via_uwire((pix & 0xFF) | 0x100); } void cmd_lcdpix(argbulk) char *argbulk; { char *argv[2]; u_long pixval; if (parse_args(argbulk, 1, 1, argv, 0) < 0) return; if (parse_hexarg(argv[0], 4, &pixval) < 0) { printf("ERROR: arg1 must be a valid 16-bit hex value\n"); return; } send_pixel_value(pixval); } void cmd_lcdinit() { /* from OsmocomBB */ send_cmd_data(0x3F, 0x01); send_cmd_data(0x20, 0x03); send_cmd_data(0x31, 0x03); } static void set_lcd_addr_region(xstart, xend, ystart, yend) { send_cmd_data(0x10, xstart); send_cmd_data(0x11, ystart); send_cmd_data(0x12, xend); send_cmd_data(0x13, yend); send_cmd_data(0x14, xstart); send_cmd_data(0x15, ystart); } void cmd_lcdfill(argbulk) char *argbulk; { int argc; char *argv[6]; u_long pixval; int xstart, xend, ystart, yend; int npix; if (parse_args(argbulk, 1, 5, argv, &argc) < 0) return; if (parse_hexarg(argv[0], 4, &pixval) < 0) { printf("ERROR: arg1 must be a valid 16-bit hex value\n"); return; } switch (argc) { case 1: xstart = ystart = 0; xend = 95; yend = 63; break; case 5: xstart = atoi(argv[1]); if (xstart < 0 || xstart > 95) { range_err: printf("ERROR: coordinate arg out of range\n"); return; } xend = atoi(argv[2]); if (xend < 0 || xend > 95) goto range_err; ystart = atoi(argv[3]); if (ystart < 0 || ystart > 63) goto range_err; yend = atoi(argv[4]); if (yend < 0 || yend > 63) goto range_err; if (xend < xstart || yend < ystart) { printf("ERROR: negative range\n"); return; } break; default: printf("ERROR: wrong number of arguments\n"); return; } set_lcd_addr_region(xstart, xend, ystart, yend); npix = (xend + 1 - xstart) * (yend + 1 - ystart); while (npix--) send_pixel_value(pixval); } void cmd_hbars() { int i, j, k, p; /* * The result of this command should be 8 horizontal bars * in the natural RGB order. */ set_lcd_addr_region(16, 79, 0, 63); for (i = 0; i < 8; i++) { for (j = 0; j < 8; j++) { p = 0; if (i & 4) p |= 0xF800; if (i & 2) p |= 0x07E0; if (i & 1) p |= 0x001F; for (k = 0; k < 64; k++) send_pixel_value(p); } } } void cmd_vbars() { int i, j, k, p; /* * The result of this command should be 8 vertical bars * in the natural RGB order. */ set_lcd_addr_region(16, 79, 0, 63); for (i = 0; i < 64; i++) { for (j = 0; j < 8; j++) { p = 0; if (j & 4) p |= 0xF800; if (j & 2) p |= 0x07E0; if (j & 1) p |= 0x001F; for (k = 0; k < 8; k++) send_pixel_value(p); } } }