Diff: as1115.h

Revision:

0:ef4b1297d850

Child:

1:b686a4955357

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/as1115.h	Mon Apr 16 13:15:07 2018 +0000
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+/******************************************************************//**
+* @file max7219.h
+* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+* OTHER DEALINGS IN THE SOFTWARE.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+**********************************************************************/
+
+
+#ifndef AS1115_H
+#define AS1115_H
+
+#include "mbed.h"
+
+
+/**
+* @brief Structure for device configuration
+* @code
+* #include "max7219.h"
+*
+* max7219_configuration_t cfg = {
+*     .device_number = 1,
+*     .decode_mode = 0,
+*     .intensity = Max7219::MAX7219_INTENSITY_8,
+*     .scan_limit = Max7219::MAX7219_SCAN_8
+* };
+* @endcode
+*/
+typedef struct
+{
+    uint8_t device_number;
+    uint8_t decode_mode;
+    uint8_t intensity;
+    uint8_t scan_limit;
+}max7219_configuration_t;
+
+
+/**
+* @brief   Serially Interfaced, 8-Digit, LED Display Driver
+*
+* @details The MAX7219/MAX7221 are compact, serial input/output common-cathode
+* display drivers that interface microprocessors (µPs) to 7-segment numeric
+* LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs.
+* Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment
+* and digit drivers, and an 8x8 static RAM that stores each digit. Only one
+* external resistor is required to set the segment current for all LEDs.
+* The MAX7221 is compatible with SPI™, QSPI™, and MICROWIRE™, and has
+* slew-rate-limited segment drivers to reduce EMI.
+*
+* @code
+* #include "mbed.h"
+* #include "max7219.h"
+*
+* Max7219 max7219(SPI0_MOSI, SPI0_MISO, SPI0_SCK, SPI0_SS);
+*
+* int main()
+* {
+*     max7219_configuration_t cfg = {
+*         .device_number = 1,
+*         .decode_mode = 0,
+*         .intensity = Max7219::MAX7219_INTENSITY_8,
+*         .scan_limit = Max7219::MAX7219_SCAN_8
+*     };
+*
+*     max7219.init_device(cfg);
+*     max7219.enable_device(1);
+*     max7219.set_display_test();
+*     wait(1);
+*     max7219.clear_display_test();
+*
+*     while (1) {
+*         max7219.write_digit(1, Max7219::MAX7219_DIGIT_0, ...
+*     }
+* }
+* @endcode
+*/
+class Max7219
+{
+    public:
+    
+    /**
+     * @brief   Digit and Control Registers
+     * @details The 14 addressable digit and control registers.
+     */
+    typedef enum
+    {
+        MAX7219_NO_OP = 0,
+        MAX7219_DIGIT_0,
+        MAX7219_DIGIT_1,
+        MAX7219_DIGIT_2,
+        MAX7219_DIGIT_3,
+        MAX7219_DIGIT_4,
+        MAX7219_DIGIT_5,
+        MAX7219_DIGIT_6,
+        MAX7219_DIGIT_7,
+        MAX7219_DECODE_MODE,
+        MAX7219_INTENSITY,
+        MAX7219_SCAN_LIMIT,
+        MAX7219_SHUTDOWN,
+        MAX7219_DISPLAY_TEST = 15
+    }max7219_register_e;
+    
+    
+    /**
+     * @brief   Intensity values
+     * @details Digital control of display brightness is provided by an
+     * internal pulse-width modulator, which is controlled by
+     * the lower nibble of the intensity register.
+     */
+    typedef enum
+    {
+        MAX7219_INTENSITY_0 = 0,
+        MAX7219_INTENSITY_1,
+        MAX7219_INTENSITY_2,
+        MAX7219_INTENSITY_3,
+        MAX7219_INTENSITY_4,
+        MAX7219_INTENSITY_5,
+        MAX7219_INTENSITY_6,
+        MAX7219_INTENSITY_7,
+        MAX7219_INTENSITY_8,
+        MAX7219_INTENSITY_9,
+        MAX7219_INTENSITY_A,
+        MAX7219_INTENSITY_B,
+        MAX7219_INTENSITY_C,
+        MAX7219_INTENSITY_D,
+        MAX7219_INTENSITY_E,
+        MAX7219_INTENSITY_F
+    }max7219_intensity_e;
+    
+    
+    /**
+     * @brief   Scan limit for mutiplexing digits
+     * @details The scan-limit register sets how many digits are 
+     * displayed, from 1 to 8. They are displayed in a multiplexed
+     * manner with a typical display scan rate of 800Hz with 8
+     * digits displayed.
+     */
+    typedef enum
+    {
+        MAX7219_SCAN_1 = 0,
+        MAX7219_SCAN_2,
+        MAX7219_SCAN_3,
+        MAX7219_SCAN_4,
+        MAX7219_SCAN_5,
+        MAX7219_SCAN_6,
+        MAX7219_SCAN_7,
+        MAX7219_SCAN_8
+    }max7219_scan_limit_e;
+        
+    
+    /**********************************************************//**
+    * @brief Constructor for Max7219 Class.  
+    * 
+    * @details Allows user to pass pointer to existing SPI bus
+    *
+    * On Entry:
+    *     @param[in] spi_bus - pointer to existing SPI object
+    *     @param[in] cs - pin to use for cs
+    *
+    * On Exit:
+    *
+    * @return None
+    **************************************************************/
+    Max7219(SPI *spi_bus, PinName cs);
+    
+    
+    /**********************************************************//**
+    * @brief Constructor for Max7219 Class.  
+    * 
+    * @details Allows user to specify SPI peripheral to use
+    *
+    * On Entry:
+    *     @param[in] mosi - pin to use for mosi
+    *     @param[in] miso - pin to use for miso
+    *     @param[in] sclk - pin to use for sclk
+    *     @param[in] cs - pin to use for cs
+    *
+    * On Exit:
+    *
+    * @return None
+    **************************************************************/
+    Max7219(PinName mosi, PinName miso, PinName sclk, PinName cs);
+    
+    
+    /**********************************************************//**
+    * @brief Default destructor for Max7219 Class.  
+    *
+    * @details Destroys SPI object if owner 
+    *
+    * On Entry:
+    *
+    * On Exit:
+    *
+    * @return None
+    **************************************************************/
+    ~Max7219();
+    
+    
+    /**********************************************************//**
+    * @brief Sets the number of MAX7219 devices being used.
+    *        Defaults to one
+    *
+    * @details 
+    *
+    * On Entry:
+    *     @param[in] num_devices - number of MAX7219 devices being
+    *                              used, max of 255 
+    *
+    * On Exit:
+    *
+    * @return Returns number of devices
+    **************************************************************/
+    int32_t set_num_devices(uint8_t num_devices);
+    
+    
+    /**********************************************************//**
+    * @brief Tests all devices being used 
+    *
+    * @details Sets bit0 of DISPLAY_TEST regiser in all devices
+    *
+    * On Entry:
+    *
+    * On Exit:
+    *
+    * @return None
+    **************************************************************/
+    void set_display_test(void);
+    
+    
+    /**********************************************************//**
+    * @brief Stops test
+    *
+    * @details Clear bit0 of DISPLAY_TEST regiser in all devices
+    *
+    * On Entry:
+    *
+    * On Exit:
+    *
+    * @return None
+    **************************************************************/
+    void clear_display_test(void);
+    
+    
+    /**********************************************************//**
+    * @brief Initializes specific device in display with given 
+    *        config data
+    *
+    * @details 
+    *
+    * On Entry:
+    *     @param[in] config - Structure containing configuration 
+    *                         data of device
+    *
+    * On Exit:
+    *
+    * @return  Returns  0 on success\n 
+    *          Returns -1 if device number is > _num_devices\n
+    *          Returns -2 if device number is 0\n
+    **************************************************************/
+    int32_t init_device(max7219_configuration_t config);
+    
+    
+    /**********************************************************//**
+    * @brief Initializes all devices with given config data
+    *
+    * @details All devices are configured with given data
+    *
+    * On Entry:
+    *     @param[in] config - Structure containing configuration 
+    *                         data
+    * On Exit:
+    *
+    * @return None
+    **************************************************************/
+    void init_display(max7219_configuration_t config);
+    
+    
+    /**********************************************************//**
+    * @brief Enables specific device in display
+    *
+    * @details 
+    *
+    * On Entry:
+    *     @param[in] device_number - device to enable
+    *
+    * On Exit:
+    *
+    * @return Returns  0 on success\n 
+    *         Returns -1 if device number is > _num_devices\n
+    *         Returns -2 if device number is 0\n
+    **************************************************************/
+    int32_t enable_device(uint8_t device_number);
+    
+    
+    /**********************************************************//**
+    * @brief Enables all device in display 
+    *
+    * @details 
+    *
+    * On Entry:
+    *
+    * On Exit:
+    *
+    * @return None
+    **************************************************************/
+    void enable_display(void);
+    
+    
+    /**********************************************************//**
+    * @brief Disables specific device in display
+    *
+    * @details 
+    *
+    * On Entry:
+    *     @param[in] device_number - device to disable
+    *
+    * On Exit:
+    *    @return Returns  0 on success\n 
+    *            Returns -1 if device number is > _num_devices\n
+    *            Returns -2 if device number is 0\n
+    **************************************************************/
+    int32_t disable_device(uint8_t device_number);
+    
+    
+    /**********************************************************//**
+    * @brief Disables all devices in display
+    *
+    * @details 
+    *
+    * On Entry:
+    *
+    * On Exit:
+    *
+    * @return None
+    **************************************************************/
+    void disable_display(void);
+    
+    
+    /**********************************************************//**
+    * @brief Writes digit of given device with given data, user
+    *        must enter correct data for decode_mode chosen
+    *
+    * @details 
+    *
+    * On Entry:
+    *     @param[in] device_number - device to write too
+    *     @param[in] digit - digit to write
+    *     @param[in] data - data to write
+    *
+    * On Exit:
+    *
+    * @return Returns  0 on success\n 
+    *         Returns -1 if device number is > _num_devices\n
+    *         Returns -2 if device number is 0\n
+    *         Returns -3 if digit > 8\n
+    *         Returns -4 if digit < 1\n
+    **************************************************************/
+    int32_t write_digit(uint8_t device_number, uint8_t digit, uint8_t data);
+    
+    
+    /**********************************************************//**
+    * @brief Clears digit of given device
+    *
+    * @details 
+    *
+    * On Entry:
+    *     @param[in] device_number - device to write too
+    *     @param[in] digit - digit to clear
+    *
+    * On Exit:
+    *
+    * @return Returns  0 on success\n 
+    *         Returns -1 if device number is > _num_devices\n
+    *         Returns -2 if device number is 0\n
+    *         Returns -3 if digit > 8\n
+    *         Returns -4 if digit < 1\n
+    **************************************************************/
+    int32_t clear_digit(uint8_t device_number, uint8_t digit);
+    
+    
+    /**********************************************************//**
+    * @brief Turns on all segments/digits of given device
+    *
+    * @details 
+    *
+    * On Entry:
+    *     @param[in] device_number - device to write too
+    *
+    * On Exit:
+    *
+    * @return Returns  0 on success\n 
+    *         Returns -1 if device number is > _num_devices\n
+    *         Returns -2 if device number is 0\n
+    **************************************************************/
+    int32_t device_all_on(uint8_t device_number);
+    
+    
+    /**********************************************************//**
+    * @brief Turns off all segments/digits of given device
+    *
+    * @details 
+    *
+    * On Entry:
+    *     @param[in] device_number - device to write too
+    *
+    * On Exit:
+    *
+    * @return Returns 0 on success\n 
+    *         Returns -1 if device number is > _num_devices\n
+    *         Returns -2 if device number is 0\n
+    **************************************************************/
+    int32_t device_all_off(uint8_t device_number);
+    
+    
+    /**********************************************************//**
+    * @brief Turns on all segments/digits of display
+    *
+    * @details 
+    *
+    * On Entry:
+    *
+    * On Exit:
+    *
+    * @return None
+    **************************************************************/
+    void display_all_on(void);
+    
+    
+    /**********************************************************//**
+    * @brief Turns off all segments/digits of display
+    *
+    * @details 
+    *
+    * On Entry:
+    *
+    * On Exit:
+    *
+    * @return None
+    **************************************************************/
+    void display_all_off(void);
+    
+      
+    private:
+    
+    SPI *_p_spi;
+    DigitalOut *_p_cs;
+    bool _spi_owner;
+    
+    uint8_t _num_devices;
+    
+};
+#endif /* AS1115_H*/
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