![]() The pinout as shown in #2 is Arduino standard. Search on your computer for a file named iom4809.h They are always present for the controller. The bit definitions are the standard definitions from Microchip. If something would be missing you could not compile the sketch. ![]() My lib is header only because of the class template. tCompare(0x0101) // MSB Duty Cycle / LSB Periode The setting 1 + 1 → 0x0101 produces the highest possible frequency with Duty Cycle 50% with 8MHz. The 16 bit compare register splits into MSB and LSB 8bit. The WO portmux is not affected by the timer registers. Both are not led out on the Nano Every Board. Both are not led out on the Nano Every board. The Nano Every Board has the following pinout. Furthermore every TCBn has a specific WO pin. You can use the 8Bit PWM or maybe the TimeOut mode. With the ATmega4809 TCB is actually not the right timer for something like this. TCB3.CTRLB |= TCB_CCMPEN_bm /* Enable Pin Output and configure TCB in 8-bit PWM mode */ TCB3.CTRLA |= TCB_CLKSEL_CLKDIV2_gc // I removed this line as it slows things down TCB3.CTRLA |= TCB_ENABLE_bm /* Enable TCB3 and Divide CLK_PER by 2 */ TCB3.CCMP = TCB_CMP_EXAMPLE_VALUE /* Load CCMP register with the period and duty cycle of the PWM */ While (CLKCTRL.MCLKSTATUS & CLKCTRL_SOSC_bm) /* Wait for system oscillator changing to finish */ #define TCB_CMP_EXAMPLE_VALUE (0x0101) // I adjusted this value to get the highest possible PWM frequencyĬPU_CCP = CCP_IOREG_gc /* Enable writing to protected register */ĬLKCTRL.MCLKCTRLB = CLKCTRL_PDIV_2X_gc | CLKCTRL_PEN_bm // I used 2X prescaler in stead of 64ĬLKCTRL.MCLKCTRLA = CLKCTRL_CLKSEL_OSC20M_gc // I Selected OSC20M in stead of OSCULP32K Is using TCB in PWM mode the way to go or is there a better way? Is it possible to get a higher frequency out of it? I don’t want to mess with the millis() function, I think I should use TCB1 or TCB0? #include I am quite proud since I am a beginner and I have just started to learn about timers, registers, ports, prescalers, etc. I have adjusted the PWM example in “getting started with TCB” and so far, I have succeeded in getting 4 MHz (see code below). I am trying to achieve the same thing on a Nano Every. TCCR1B = bit (WGM12) | bit (CS10) // CTC, no prescaling TCCR1A = bit (COM1A0) // toggle OC1A on Compare Match ![]() With an Arduino Nano it is possible to get a 8 MHz clock signal on pin 9: void setup ()
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