7segLed_HC595.h

00001 /*
00002  * Mbed Library / Akizuki 7-segment LED driver [OSL10564-74HC595-x]
00003  *  http://akizukidenshi.com/catalog/g/gM-12643/
00004  *
00005  * Copyright (c) 2018 Kenji Arai / JH1PJL
00006  *  http://www.page.sannet.ne.jp/kenjia/index.html
00007  *  http://mbed.org/users/kenjiArai/
00008  *      Created:    January    7th, 2018
00009  *      Revised:    January   22nd, 2018
00010  */
00011 
00012 #ifndef SEVENSEG_LED_DRVR_H
00013 #define SEVENSEG_LED_DRVR_H
00014 
00015 #include "mbed.h"
00016 
00017 #define BUFFER_SIZE     32
00018 
00019 //extern Serial pc;     // only for dubug
00020 
00021 /**
00022  * @code
00023  * #include "mbed.h"
00024  * #include "7segLed_HC595.h"
00025  *
00026  * // case for Nucleo-F446RE, F411RE, F401RE
00027  * //              SPI MOSI, SCLK,port/out,PWM, num of digits
00028  * SevenSegLed led_7segs(D4, D3,  D5,      D2,  6);
00029  *
00030  *  int main() {
00031  *      int32_t count = 123456U;
00032  *      while(true) {
00033  *          led_7segs = count++;
00034  *          wait(0.1f);
00035  *      }
00036  *  }
00037  * @endcode
00038  */
00039 
00040 class SevenSegLed 
00041 {
00042 public:
00043     /** 7segments LED driver with 74HC595 (SER, SRCLK, RCLK, /OE)
00044      *  @param sdo (->SER), sclk (->SRCLK), latch (->RCLK), bright (->/OE)
00045      *  @param sdo must be SPI MOSI and sclk must be same SPI SCLK
00046      *  @param latch is any output port
00047      *  @param bright must be PwmOut port
00048      *  @param num_of_digit -> # of 7seg LED's
00049      */
00050     SevenSegLed(PinName sdo, PinName sclk, PinName latch, PinName bright,
00051                 uint8_t num_of_digit);
00052 
00053     /** Set data into 7seg LED's
00054      *  @param  unsigned data (overflow may occur depend on number of LEDs)
00055      *  @return none
00056      */
00057     void put_num(int32_t dt);
00058 
00059     SevenSegLed & operator= (int value) {
00060         put_num(value);
00061         return *this;
00062     }
00063 
00064     /** Set ascii number into 7seg LED's
00065      *  @param  ASCII data
00066      *  @return none
00067      */
00068     void put_ascii(const char *data);
00069 
00070     /** Set ascii character strings into 7seg LED's
00071      *  @param  all ASCII character
00072      *  @return none
00073      */
00074     void put_strings(const char *data);
00075 
00076     /** Set raw data into 7seg LED's
00077      *  @param  Raw data (Segment element)
00078      *  @return none
00079      */
00080     void put_raw(uint8_t *data);
00081 
00082     /** Set dot into 7seg LED's
00083      *  @param  position (1= LSB, 2=2nd, 4=3rd, 8=4th, 16, 32, 64 ----)
00084      *  @return none
00085      */
00086     void put_dot(uint16_t position);
00087     void clear_all_dot(void);
00088 
00089     /** Set Brightness
00090      *  @param  britness max(1.0f) and min = all LED off(0.0f)
00091      *  @return none
00092      */
00093     void brightness(float bright);
00094 
00095     /** Set Zero Suppress (defalt OFF)
00096      *  @param  mode=true -> zero suppress ON, mode = false -> OFF
00097      *  @return none
00098      */
00099     void zero_suppress(bool mode);
00100 
00101     /** Set clock frequency
00102      *  @param  clock frequency (default 1000000Hz(1MHz))
00103      *  @return none
00104      */
00105     void frequency(int32_t freq);
00106 
00107 protected:
00108     SPI         spi_;
00109     DigitalOut  latch_;
00110     PwmOut      pwm_;
00111 
00112     uint8_t     buf[BUFFER_SIZE];
00113     uint8_t     seg[BUFFER_SIZE];
00114     uint8_t     num;
00115     uint16_t    dot_inf;
00116     uint32_t    wrk;
00117     bool        zerosuppress;
00118     bool        num_mode;
00119     float       bright_data;
00120 
00121     void seven_seg_n_digt(void);
00122     void set_dot(void);
00123     void spi_out(void);
00124 
00125 };
00126 
00127 #endif // SEVENSEG_LED_DRVR_H