diff options
| author | Andreas Eversberg <jolly@eversberg.eu> | 2017-01-13 13:55:49 +0100 |
|---|---|---|
| committer | Andreas Eversberg <jolly@eversberg.eu> | 2017-02-18 21:01:01 +0100 |
| commit | 21c5c3195d41a1f2b7a8b1f34c9e10d1afbc73d0 (patch) | |
| tree | 107e2d826251b7e93f17aadb980e40472feef2c3 /src/common | |
| parent | c0e30d35d66e699c15c1984dd6a0cdd81ecb4405 (diff) | |
Plot IQ data as red points on display, if overdriven (vector length >= 1.0)
Diffstat (limited to 'src/common')
| -rw-r--r-- | src/common/display_iq.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/src/common/display_iq.c b/src/common/display_iq.c index a19ae8d..2e1bd52 100644 --- a/src/common/display_iq.c +++ b/src/common/display_iq.c @@ -29,6 +29,7 @@ #define SIZE 23 static char screen[SIZE][MAX_DISPLAY_WIDTH]; +static char overdrive[SIZE][MAX_DISPLAY_WIDTH]; static int iq_on = 0; static double db = 80; @@ -107,7 +108,7 @@ void display_iq(float *samples, int length) int i, j, k; int color = 9; /* default color */ int x_center, y_center; - double I, Q, l, s; + double I, Q, L, l, s; int x, y; int width, h; @@ -134,12 +135,14 @@ void display_iq(float *samples, int length) buffer[pos++] = *samples++; if (pos == MAX_DISPLAY_IQ) { memset(&screen, ' ', sizeof(screen)); + memset(&overdrive, 0, sizeof(overdrive)); for (j = 0; j < MAX_DISPLAY_IQ; j++) { I = buffer[j * 2]; Q = buffer[j * 2 + 1]; + L = I*I + Q*Q; if (iq_on > 1) { /* logarithmic scale */ - l = sqrt(I*I + Q*Q); + l = sqrt(L); s = log10(l) * 20 + db; if (s < 0) s = 0; @@ -175,6 +178,8 @@ void display_iq(float *samples, int length) screen[y/2][x] = '\''; else screen[y/2][x] = '.'; + if (L > 1.0) + overdrive[y/2][x] = 1; } if (iq_on == 1) sprintf(screen[0], "(IQ linear"); @@ -202,10 +207,17 @@ void display_iq(float *samples, int length) } else putchar('|'); } else if (screen[j][k] == ':' || screen[j][k] == '.' || screen[j][k] == '\'') { - /* green plot */ - if (color != 2) { - color = 2; - printf("\033[1;32m"); + /* red / green plot */ + if (overdrive[j][k]) { + if (color != 1) { + color = 1; + printf("\033[1;31m"); + } + } else { + if (color != 2) { + color = 2; + printf("\033[1;32m"); + } } putchar(screen[j][k]); } else if (screen[j][k] != ' ') { |