void Emutex_MAX9657::testLedOutputs(bool y) {
if (!initialised)
return;
if (mode != MAX9657_MODE_CCLED)
return;
writeConfigReg(ADDR_DISP_TEST, y ? DISPLAY_TEST_ON : DISPLAY_TEST_OFF);
}
void Emutex_MAX9657::setLedIntensity(byte intensity) {
if (!initialised)
return;
if (mode != MAX9657_MODE_CCLED)
return;
if (intensity >= 0 || intensity < 16)
writeConfigReg(ADDR_G_CURRENT, intensity);
}
void Thermal_init(){
I2C_init(THERMAL_I2C_ID,I2C_CLOCK_FREQ);
count = 0;
readEeprom();
writeTrimmingValue();
writeConfigReg();
readConfigReg();
configCalculationData();
Timer_new(TIMER_THERMAL,READ_DELAY);
}
void Emutex_MAX9657::end() {
writeConfigReg(ADDR_CONFIG, CONFIG_SHUTDOWN_ON);
}
void Emutex_MAX9657::begin() {
if (!initialised) {
// Configure the SPI bus
pinMode(cs, OUTPUT);
digitalWrite(cs, HIGH);
SPI.begin();
SPI.setDataMode(SPI_MODE0);
SPI.setBitOrder(MSBFIRST);
SPI.setClockDivider(SPI_CLOCK_DIV4); // Using 4MHz default, but MAX9657 can support up to 26MHz
if (mode == MAX9657_MODE_CCLED) {
// Configure all outputs as full-strength (24mA) constant-current LED drivers
// NOTE 1: In this mode, the pins are open-drain current sink, for connection to LED cathodes
// NOTE 2: If using a 5V supply, the datasheet recommends using an 82ohm resistor in series
// with each LED and limiting the current drive strength to 20mA. So we set default
// drive strength here at 19.5mA. Use ::setIntensity(15) to change if needed.
// If using a 3.3V supply, 24mA drive strength can be used with no series resistors
writeConfigReg(ADDR_G_CURRENT, CURRENT_DRIVE_DFLT);
writeConfigReg(ADDR_CFG_P7_4, PORT_CFG_LED_DRIVER);
writeConfigReg(ADDR_CFG_P11_8, PORT_CFG_LED_DRIVER);
writeConfigReg(ADDR_CFG_P15_12, PORT_CFG_LED_DRIVER);
writeConfigReg(ADDR_CFG_P19_16, PORT_CFG_LED_DRIVER);
writeConfigReg(ADDR_CFG_P23_20, PORT_CFG_LED_DRIVER);
writeConfigReg(ADDR_CFG_P27_24, PORT_CFG_LED_DRIVER);
writeConfigReg(ADDR_CFG_P31_28, PORT_CFG_LED_DRIVER);
} else if (mode == MAX9657_MODE_OUTPUT) {
writeConfigReg(ADDR_CFG_P7_4, PORT_CFG_GPIO_OUT);
writeConfigReg(ADDR_CFG_P11_8, PORT_CFG_GPIO_OUT);
writeConfigReg(ADDR_CFG_P15_12, PORT_CFG_GPIO_OUT);
writeConfigReg(ADDR_CFG_P19_16, PORT_CFG_GPIO_OUT);
writeConfigReg(ADDR_CFG_P23_20, PORT_CFG_GPIO_OUT);
writeConfigReg(ADDR_CFG_P27_24, PORT_CFG_GPIO_OUT);
writeConfigReg(ADDR_CFG_P31_28, PORT_CFG_GPIO_OUT);
} else {
/* MAX9657 Input Modes unsupported in current version */
return;
}
initialised = true;
}
// Write default configuration (shutdown, global current control, no transition detect)
writeConfigReg(ADDR_CONFIG, CONFIG_SHUTDOWN_OFF);
}
