I am trying to generate three phase sinosidal PWM with the N2HET2 on RM46. N2HET1 is being used for something else.
I am initializing the HTU like so:
htuRAM2->DCP[0].ITCOUNT = 0x00010000 + SINE_SAMPLE_COUNT; htuRAM2->DCP[0].IHADDRCT = (htuRAM2->DCP[0].IHADDRCT & 0x0) | //Clear Register 0x1 << 23 | //DIR 0x0 << 22 | //SIZE 0x0 << 21 | //ADDMH 0x0 << 20 | //ADDFM 0x1 << 18 | //TMBA 0x0 << 16 | //TMBB 0x28; //IHADDR htuRAM2->DCP[0].IFADDRA = (unsigned int)sine_qtz_lut; htuRAM2->DCP[1].ITCOUNT = 0x00010000 + SINE_SAMPLE_COUNT; htuRAM2->DCP[1].IHADDRCT = (htuRAM2->DCP[1].IHADDRCT & 0x0) | //Clear Register 0x1 << 23 | //DIR 0x0 << 22 | //SIZE 0x0 << 21 | //ADDMH 0x0 << 20 | //ADDFM 0x1 << 18 | //TMBA 0x0 << 16 | //TMBB 0x68; //IHADDR htuRAM2->DCP[1].IFADDRA = (unsigned int)(sine_qtz_lut); htuRAM2->DCP[2].ITCOUNT = 0x00010000 + SINE_SAMPLE_COUNT; htuRAM2->DCP[2].IHADDRCT = (htuRAM2->DCP[2].IHADDRCT & 0x0) | //Clear Register 0x1 << 23 | //DIR 0x0 << 22 | //SIZE 0x0 << 21 | //ADDMH 0x0 << 20 | //ADDFM 0x1 << 18 | //TMBA 0x0 << 16 | //TMBB 0xA8; //IHADDR htuRAM2->DCP[2].IFADDRA = (unsigned int)(&(sine_qtz_lut[80])); htuREG2->CPENA = 0x00000015; htuREG2->GC = 0x00010000;
And the N2HET2 module like so:
uint8_t iter_instr, iter_pins; hetREG2->PFR = LRPFC << 8; hetREG2->REQENS = 7; hetREG2->DIR = (1 << NHET2_PWM_PIN_U) | (1 << NHET2_PWM_PIN_V) | (1 << NHET2_PWM_PIN_W) | (1 << NHET2_PWM_PIN_U_BAR) | (1 << NHET2_PWM_PIN_V_BAR) | (1 << NHET2_PWM_PIN_W_BAR); hetRAM2->Instruction[pHET_L00_1].Control = (uint32_t)(arg_period) | (hetRAM2->Instruction[pHET_L00_1].Control & 0xFE000000); for(iter_instr = pHET_L01_1, iter_pins = 0; iter_instr < 12; iter_instr += 2, iter_pins++) hetRAM2->Instruction[iter_instr].Control = (hetRAM2->Instruction[iter_instr].Control & 0xFFFFE0FF) | (three_phase_pins[iter_pins] << 8);
The N2HET program is as follows:
PWM_PERIOD .equ 10
PWM_PIN_U .equ 0
PWM_PIN_U_BAR .equ 3
PWM_PIN_V .equ 1
PWM_PIN_V_BAR .equ 4
PWM_PIN_W .equ 2
PWM_PIN_W_BAR .equ 5
INIT_COMPARE .equ 5
INIT_HR_DELAY .equ 0
L00: CNT{next=L01, reqnum=0, request=GENREQ, reg=A, irq=OFF, max=PWM_PERIOD};
L01: ECMP{next=L04, hr_lr=HIGH, en_pin_action=ON, cond_addr=L02, pin=PWM_PIN_U, action=PULSELO, reg=A, irq=OFF, data=INIT_COMPARE, hr_data=INIT_HR_DELAY};
L02: MOV32{next=L03, remote=L01, type=IMTOREG&REM, reg=NONE, data=INIT_COMPARE, hr_data=INIT_HR_DELAY};
L03: ECMP{next=L04, hr_lr=HIGH, en_pin_action=ON, cond_addr=L04, pin=PWM_PIN_U_BAR, action=PULSEHI, reg=B, irq=OFF, data=0, hr_data=INIT_HR_DELAY};
L04: BR{next=L05, cond_addr=L05, event=NOCOND, reqnum=1, request=GENREQ};
L05: ECMP{next=L07, hr_lr=HIGH, en_pin_action=ON, cond_addr=L06, pin=PWM_PIN_V, action=PULSELO, reg=A, irq=OFF, data=INIT_COMPARE, hr_data=INIT_HR_DELAY};
L06: MOV32{next=L07, remote=L05, type=IMTOREG&REM, reg=NONE, data=INIT_COMPARE, hr_data=INIT_HR_DELAY};
L07: ECMP{next=L08, hr_lr=HIGH, en_pin_action=ON, cond_addr=L08, pin=PWM_PIN_V_BAR, action=PULSEHI, reg=B, irq=OFF, data=0, hr_data=INIT_HR_DELAY};
L08: BR{next=L09, cond_addr=L09, event=NOCOND, reqnum=2, request=GENREQ};
L09: ECMP{next=L11, hr_lr=HIGH, en_pin_action=ON, cond_addr=L10, pin=PWM_PIN_W, action=PULSELO, reg=A, irq=OFF, data=INIT_COMPARE, hr_data=INIT_HR_DELAY};
L10: MOV32{next=L11, remote=L09, type=IMTOREG&REM, reg=NONE, data=INIT_COMPARE, hr_data=INIT_HR_DELAY};
L11: ECMP{next=L12, hr_lr=HIGH, en_pin_action=ON, cond_addr=L12, pin=PWM_PIN_W_BAR, action=PULSEHI, reg=B, irq=OFF, data=0, hr_data=INIT_HR_DELAY};
L12: BR{next=L00, cond_addr=L00, event=NOCOND};
So my first wave comes out fine, but the wave on the second channel does not. It feels as if its missing a few samples or something. Is it a problem with the buffer initialization?
