Kansai Electric Power usage meter (Denki-yohou) for GainSpan Wi-Fi http://mbed.org/users/okini3939/notebook/denki-yohou/
Dependencies: mbed GSwifi (old)
7seg.cpp
- Committer:
- okini3939
- Date:
- 2012-10-17
- Revision:
- 3:4bf32f60a770
- Parent:
- 2:8646918ffff2
File content as of revision 3:4bf32f60a770:
#include "mbed.h" #include "7seg.h" static DigitalOut led_k[8] = {p34, p36, p26, p24, p23, p35, p30, p25}; static DigitalOut led_a[4] = {p16, p17, p18, p19}; static Ticker tick; static int ledbuf[4] = {-1, -1, -1, -1}; const int digits[10] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f}; void leddisp () { static int n = 0; int i, bit; // led off for (i = 0; i < 8; i ++) { led_k[i] = 1; } led_a[n] = 1; // common off n ++; if (n >= 4) n = 0; // led on if (ledbuf[n] >= 0) { bit = 1; for (i = 0; i < 7; i ++) { led_k[i] = digits[ledbuf[n] & 0x7f] & bit ? 0 : 1; bit = bit << 1; } led_k[7] = ledbuf[n] & 0x80 ? 0 : 1; } led_a[n] = 0; // common on } void writeled (int num, int dot, int mask, int zero) { if (((num >= 1000) || (zero & 0x08)) && (mask & 0x08)) { ledbuf[0] = num / 1000 % 10; } else { ledbuf[0] = -1; } if (((num >= 100) || (zero & 0x04)) && (mask & 0x04)) { ledbuf[1] = (num / 100) % 10; } else { ledbuf[1] = -1; } if (((num >= 10) || (zero & 0x02)) && (mask & 0x02)) { ledbuf[2] = (num / 10) % 10; } else { ledbuf[2] = -1; } if (mask & 0x01) { ledbuf[3] = num % 10; } else { ledbuf[3] = -1; } if (dot >= 1 && dot <= 4) { ledbuf[dot - 1] |= 0x80; } } void initled () { int i; for (i = 0; i < 4; i ++) { led_a[i] = 1; } for (i = 0; i < 8; i ++) { led_k[i] = 1; } } void startled () { tick.attach_us(&leddisp, 2500); // 400Hz }