OSL10564_74HC595
Fork of OSL10564_74HC595 by
7segLed_HC595.cpp
- Committer:
- shivanandgowdakr
- Date:
- 2018-08-14
- Revision:
- 1:a3755014b7f1
- Parent:
- 0:3373357a49f4
File content as of revision 1:a3755014b7f1:
#include "7segLed_HC595.h" SevenSegLed::SevenSegLed ( PinName sdo, PinName sclk, PinName latch, PinName bright, uint8_t num_of_digit ) : spi_(sdo, NC, sclk), latch_(latch), pwm_(bright) { num = num_of_digit; dot_inf = 0; zerosuppress = false; spi_.frequency(1000000); spi_.format(8,0); latch_ = 0; pwm_.period_ms(2); bright_data = 1.0f; pwm_.pulsewidth_us(bright_data); } void SevenSegLed::put_num(int32_t dt) { wrk = dt; for(uint32_t i = 0; i < num; i++) { buf[i] = wrk % 10; // set each digit value wrk /= 10; // next digit } num_mode = true; // set number display mode seven_seg_n_digt(); // convert to seven segment element and send SPI } void SevenSegLed::put_ascii(const char *data) { char dt; dot_inf = 0; // clear all dot for (uint32_t i = 0; i < BUFFER_SIZE; i++) { buf[i] = 0; } int32_t po = num - 1; for(uint32_t pi = 0; ; pi++) { dt = *(data + pi); //pc.putc(dt); if (dt == 0) { break; // end of strings } if (dt == '.') { // check dot if (pi == 0) { buf[po] = 0; po--; dot_inf |= 1U << num - 1; // set dot } else { dot_inf |= 1U << (po + 1); // set dot } pi++; dt = *(data + pi); } buf[po] = dt - '0';// convert ASCII number to value po--; if (po == -1) { break; } } num_mode = false; // set none number display mode seven_seg_n_digt(); // convert to seven segment element and send SPI } void SevenSegLed::put_raw(uint8_t *data) { for(uint32_t i = 0; i < num; i++) { uint8_t dt = *(data + i); if (dt == 0) { break; } seg[i] = dt; } spi_out(); } void SevenSegLed::put_dot(uint16_t position) { dot_inf = position; } void SevenSegLed::clear_all_dot() { dot_inf = 0; } void SevenSegLed::zero_suppress(bool mode) { zerosuppress = mode; } void SevenSegLed::brightness(float bright) { bright_data = bright; pwm_.pulsewidth_us((int)(2000 * (1.0f - bright))); } void SevenSegLed::frequency(int32_t freq) { spi_.frequency((int)freq); } void SevenSegLed::seven_seg_n_digt() { uint8_t const seg_bit[10] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7c, 0x27, 0x7f, 0x67}; // 0 1 2 3 4 5 6 7 8 9 for(uint32_t i = 0; i < num; i++) { seg[i] = seg_bit[buf[i]]; // convert number to segment data } if ((num_mode == true) && (zerosuppress == true)) { // zero suppress for(uint32_t i = 0; i < num; i++) { if (seg[num -1 - i] == 0x3f) { // if zero then zero suppress if ((num -1 - i) == 0) { break; } seg[num -1 - i] = 0; } else { break; } } } set_dot(); spi_out(); } void SevenSegLed::set_dot() { for(uint8_t i = 0; i < num; i++) { if ((dot_inf >> i) & 0x0001) { // check dot request seg[i] |= 0x80; // add dot } } for(uint8_t i = 0; i < num; i++) { if (seg[num -1 - i] & 0x80) { // check dot is on or off if (seg[num -1 - i] == 0x80) { // did zero suppress condition seg[num -1 - i] = 0xbf; // set zero+dot for(i++; i < num; i++) { if (seg[num -1 - i] == 0) { // check zero suppress seg[num -1 - i] = 0x3f; // set zero } } break; } } } } void SevenSegLed::spi_out() { pwm_.pulsewidth_us(0); for(uint32_t i = 0; i < num; i++) { spi_.write(seg[i]); // send SPI line } latch_ = 1; // set latch pulse wait_us(2); latch_ = 0; pwm_.pulsewidth_us((int)(2000 * (1.0f - bright_data))); } //------------------------------------------------------------------------------ // Alphabet on 7segment // refernce // WentWayUp: WebLog // http://wentwayup.tamaliver.jp/e400000.html //------------------------------------------------------------------------------ #define OFFSET 0x20 char const alphabet_7seg[] = { // space 0x00, // ! " # $ % & ' ( ) * 0x0a, 0x22, 0x7e, 0x2d, 0x24, 0x3c, 0x20, 0x61, 0x43, 0x63, // + , - . / 0x44, 0x0c, 0x40, 0x10, 0x52, // 0 1 2 3 4 5 6 7 8 9 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7c, 0x07, 0x7f, 0x67, // : ; < = > ? 0x09, 0x51, 0x59, 0x48, 0x4d, 0x4b, // @ 0x5f, // A B C D E F G H I J (another C=0x39) 0x77, 0x7c, 0x58, 0x5e, 0x79, 0x71, 0x3d, 0x74, 0x04, 0x1e, // K L M N O P Q R S T 0x75, 0x38, 0x55, 0x54, 0x5c, 0x73, 0x6b, 0x50, 0x6c, 0x78, // U V W X Y Z (another W=0x7e) 0x1c, 0x1d, 0x2a, 0x49, 0x6e, 0x1b, // [ \ ] ^ _ 0x39, 0x64, 0x0f, 0x23, 0x08, // ` 0x02, // a b c d e f g h i j 0x77, 0x7c, 0x58, 0x5e, 0x79, 0x71, 0x3d, 0x74, 0x04, 0x1e, // k l m n o p q r s t 0x75, 0x38, 0x55, 0x54, 0x5c, 0x73, 0x6b, 0x50, 0x6c, 0x78, // u v w x y z 0x1c, 0x1d, 0x2a, 0x49, 0x6e, 0x1b, // { | } ~ 0x46, 0x30, 0x70, 0x01 }; void SevenSegLed::put_strings(const char *data) { for(uint32_t i = 0; i < num; i++) { char c = *(data + i); if (c <= OFFSET) { // control charcters seg[num -1 - i] = 0; } else if ( c > '~') { // over '~' characters seg[num -1 - i] = 0; } else { // serach table seg[num -1 - i] = alphabet_7seg[c - OFFSET]; } } spi_out(); }