Driver C++ source code for MAX5216/MAX5214 16-bit/14-bit DAC SPI (50MHz) bus ICs. Low power Digital-to_Analog Converter chips which accept supply voltages of 2.7V to 5.5V. Features Rail-to-Rail Buffered Output Operation and Safe Power-On Reset (POR) to Zero DAC Output.
Dependents: MAX5216_16_Bit_DAC_Hello_Code
Fork of MAX5487_Digital_Pot_Potentiometer_Rheostat_Resistor_Wiper by
MAX5216.h
- Committer:
- phonemacro
- Date:
- 2018-08-12
- Revision:
- 4:280d1e05f2ca
- Parent:
- MAX5487.h@ 3:4d4053c4c29e
- Child:
- 5:bd8dbd9be2ac
File content as of revision 4:280d1e05f2ca:
/******************************************************************************* * @file MAX5216.h ******************************************************************************* */ #ifndef MAX5216_H #define MAX5216_H #include "mbed.h" const unsigned int MAX521X_IC_BIT_MASK[] = { 0X00003FFF, // 14 Bits for MAX5214 0X0000FFFF // 16 Bits for MAX5216 }; const int MAX521X_NUM_BYTES_SPI[] = { 2, // 2 bytes for MAX5214 3 // 3 bytes for MAX5216 }; /** * @brief 16-bit, 14-bit digital-to-analog converters (DACs) * for the MAX5216, MAX5214. * @version 1.0000.0 * * @details The MAX5214/MAX5216 accept a wide 2.7V to 5.5V supply * voltage range. Power consumption is extremely low * to accommodate most low-power and low-voltage applications. * These devices feature a 3-wire SPI-/QSPI™-/ * MICROWIRE-/DSP-compatible serial interface * This driver is compatible with the * MAX5216, MAX5214. * * @code * #include "mbed.h" * #include "max32630fthr.h" * #include "MAX5216.h" * #include "USBSerial.h" * MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3); * DigitalOut rLED(LED1); * DigitalOut gLED(LED2); * DigitalOut bLED(LED3); * DigitalOut selectPin(P3_0); // Pin 3_0 is used to drive chip enable low * SPI spi(P5_1, P5_2, P5_0); // mosi, miso, sclk * * int main() * { * selectPin = 0; * MAX5216 dac(spi, selectPin, MAX5216::MAX5216_IC); * spi.format(8,0); * spi.frequency(1000000); * dac.writeCommand(MAX5216::WrtThru_Reg, 0xFFFF); * wait(1.0); * dac.writeCommand(MAX5216::WrtThru_Reg, 0x7FFF); * wait(1.0); * dac.writeCommand(MAX5216::NoOp_Reg, 0xFFFF); * } * @endcode */ class MAX5216{ public: /** * @brief IC's supported with this driver * @details MAX5214, MAX5216 */ typedef enum { MAX5214_IC = 0, MAX5216_IC = 1 }MAX521X_ic_t; /** * @brief Commands supported by the DAC * @details The upper 2 bits of the first byte define the commands */ typedef enum { NoOp_Reg = (0x0<<6), // No Operation //tbd PwrDwn_Reg = (0x2<<6), // Power Down WrtThru_Reg = (0x1<<6) // Write Through } setting_t; /** * @brief Power Down modes * @details 2 bits are used to define the power down modes */ typedef enum { PwrDwnNormalOp = 0x0<<2, // DAC powers up and returns to its previous code setting. PwrDwnHiZ = 0x1<<2, // DAC powers down; OUT is high impedance. PwrDwn100K = 0x2<<2, // DAC powers down; OUT connects to ground through an internal 100k resistor. PwrDwn10K = 0x3<<2 // DAC powers down; OUT connects to ground through an internal 1k resistor. } pwrDwnMode_t; /**********************************************************//** * @brief Constructor for MAX5216 Class. * * @details Requires an existing SPI object as well as a DigitalOut object. * The DigitalOut object is used for a chip enable signal * * On Entry: * @param[in] spi - pointer to existing SPI object * @param[in] pin - pointer to a DigitalOut pin object * @param[in] ic_variant - which type of MAX521x is used * * On Exit: * * @return None **************************************************************/ MAX5216(SPI &spi, DigitalOut &pin, MAX521X_ic_t ic_variant); /** * @brief Send write command * @param setting - Command sent to MAX5216 register * @param value - 14 or 16 bit Value to write * @return void */ void writeCommand(MAX5216::setting_t setting, uint32_t value); // void writeCommand(setting_t setting, pwrDwnMode_t mode); /************************************************************ * @brief Default destructor for MAX5216 Class. * * @details Destroys SPI object if owner * * On Entry: * * On Exit: * * @return None **************************************************************/ ~MAX5216(); private: // SPI object SPI &m_spi; // Selector pin object DigitalOut &m_pin; // Identifies which IC variant is being used MAX521X_ic_t m_ic_variant; }; #endif