int main()
{
reset_reason = scuPostReset(CLKCR_M32_P64);
enablePin(1, 0, GPIO_OUT_PP); // LED
enablePin(1, 1, GPIO_OUT_PP); // LED
enablePin(2, 1, GPIO_OUT_PP_ALT6); // P2.1 alt6 is USIC0_CH0_DOUT0
enablePin(2, 2, GPIO_IN_FLOAT); // P2.2 is the debug serial input
// If we can't configure the serial port then hang.
unsigned int ch0_cbase = usicConfigure(0, USIC_PROTO_ASC);
while (ch0_cbase == 0) {
asm("wfi");
}
usicFifoEnable(0);
configureCCU();
// Clock = 64MHz so 8000000 - 1 is 8 systicks/second.
systickEnable(8000000 - 1);
enable_interrupts();
// Start CCU slices 0 and 1 simultaneously.
ccuStartSlices(BIT1 | BIT0);
usicBufferedSendCh0("Ready.\r\n");
while(1)
{
asm("wfi");
}
return 0;
}
void boardInit(void)
{
SIM_SCGC5 |= 0x00000400; //enable Port B clock
SIM_SCGC5 |= 0x00000200; //enable Port A clock
SIM_SCGC5 |= 0x00001000; //enable Port D clock
PORTB_PCR19 |= (uint32_t)0x00000100; //Configure portB19 as GPIO (GREEN)
GPIOB_PDDR |= (uint32_t)0x00080000; //Configure portB19 as output
PORTA_PCR12 |= (uint32_t)0x000A0102; //Configure portA12 as GPIO with falling edge interrupt and pullup enabled.
GPIOA_PDDR &= ~(uint32_t)(1<<12); //Configure portA12 as input.
PORTB_PCR18 |= (uint32_t)0x00000100; //Configure portB18 as GPIO (RED)
GPIOB_PSOR |= (uint32_t)0x00040000;
GPIOB_PDDR |= (uint32_t)0x00040000; //Configure portB18 as output
PORTD_PCR1 |= (uint32_t)0x00000100; //Configure portD1 as GPIO (BLUE)
FGPIOD_PSOR |= (uint32_t)0x00000002;
FGPIOD_PDDR |= (uint32_t)0x00000002; //Configure portD1 as output
//SIM_SCGC6 |= (uint8_t) 0x00800000; // Enable PIT clock
SIM_SOPT2 |= 0x01000000; // Set TPM to use the MCGFLLCLK as a clock source
// MCGFLLCLK is either 24MHz or 23 986 176Hz
SIM_SCGC6 |= 0x01000000; // Enable TPM0 clock
uart0Config();
uart0Enable();
llwuConfigure();
vllsEnable();
vllsConfigure(1);
PMC_REGSC = 0x08;
systickConfigure();
interruptSetPriority(30,0); //Port A ISR
interruptEnable(30);
interruptSetPriority(7,0); // Configure LLWU interrupt as highest priority.
interruptEnable(7); //Enable LLWU interrupt.
systickEnable();
rtcInit();
rtcStart();
interruptSetPriority(21,0); // Configure RTC Seconds interrupt as highest priority.
interruptEnable(21); //Enable RTC Seconds interrupt.
i2cInit();
interruptSetPriority(9,3); // Configure I2C interrupt as Lowest priority.
interruptEnable(9); //Enable I2C interrupt.
interruptSetPriority(22,3); // Configure PIT interrupt as Lowest priority.
interruptEnable(9); //Enable PIT interrupt.
}
int main()
{
// Changing this clock speed also requires a change to the argument
// to systickEnable().
scuPostReset(CLKCR_M8_P8);
// Configure GPIO
enablePin(1, 0, GPIO_OUT_PP_ALT6); // LED is ACMP1.OUT
enablePin(1, 1, GPIO_OUT_PP); // LED
enablePin(2, 1, GPIO_OUT_PP_ALT6); // P2.1 alt6 is USIC0_CH0_DOUT0
enablePin(2, 2, GPIO_IN_FLOAT); // P2.2 is the debug serial input
// enablePin(2, 8, GPIO_IN_FLOAT); // P2.8 ACMP0.INN (Vref/2)
// enablePin(2, 9, GPIO_OUT_PP); // P2.9 ACMP0.INP
enablePin(2, 6, GPIO_IN_FLOAT); // P2.6 ACMP1.INN
enablePin(2, 7, GPIO_IN_FLOAT); // P2.7 ACMP1.INP (Vref/2)
enablePin(2, 11, GPIO_OUT_PP); // P2.11 ACMP.Vref
clearPin(1, 1);
// 1Hz (8MHz / 8M)
systickEnable(8000000 - 1);
// Configure ACMP
acmpEnable();
// ACMP1 enabled with 15mv hysteresis and INP is Vref/2
acmpConfigure(1, ACMP_CMP_EN |
// ACMP_CMP1_DIV_EN |
ACMP_CMP_HYST_ADJ_15);
// ACMP0 enabled with 15mv hysteresis and INN is Vref/2
//acmpConfigure(0, ACMP_CMP_EN |
// ACMP_CMP0_SEL |
// ACMP_CMP_HYST_ADJ_15);
// Turn on Vref
clearPin(2, 11); // Vref
// Turn off ACMP inputs
// clearPin(2, 6); // ACMP1.INN
// clearPin(2, 7); // ACMP1.INP
enable_interrupts();
while(1)
{
asm("wfi");
}
return 0;
}
int main()
{
scuPostReset(CLKCR_M32_P64);
// On board LEDs.
enablePin(1, 0, GPIO_OUT_PP);
enablePin(1, 1, GPIO_OUT_PP);
// Pins used for USIC channel 0 ASC mode.
enablePin(2, 1, GPIO_OUT_PP_ALT6); // USIC0_CH0_DOUT0
enablePin(2, 2, GPIO_IN_FLOAT); // debug serial input
clearPin(1, 0);
clearPin(1, 1);
// Pins used for USIC channel 1 SSC mode.
enablePin(0, 6, GPIO_IN_FLOAT); // DX0C in
enablePin(0, 7, GPIO_OUT_PP_ALT7); // data out
enablePin(0, 8, GPIO_OUT_PP_ALT7); // sclk out
enablePin(0, 9, GPIO_OUT_PP_ALT7); // chip select out
ch0_cbase = usicConfigure(0, USIC_PROTO_ASC);
ch1_cbase = usicConfigure(1, USIC_PROTO_SSC);
while (ch0_cbase == 0 || ch1_cbase == 0) {
asm("wfi");
}
usicFifoEnable(0);
systickEnable(8000000 - 1);
enable_interrupts();
usicBufferedSendCh0("Ready.\r\n");
while(1)
{
asm("wfi");
}
return 0;
}
int main()
{
scuPostReset(CLKCR_M32_P64);
enablePin(1, 0, GPIO_OUT_PP); // LED
enablePin(1, 1, GPIO_OUT_PP); // LED
enablePin(2, 1, GPIO_OUT_PP_ALT6); // P2.1 alt6 is USIC0_CH0_DOUT0
enablePin(2, 2, GPIO_IN_FLOAT); // P2.2 is the debug serial input
// Capture compare unit config
ccuEnable(GCTRL_SUSCFG_ROLLOVER);
// Slice 0: 40kHz 50% PWM.
// Event 1: active high, rising edge, input I (SCU)
// Clear the timer (STRM) and start on event 1
// Transfer shadow registers on timer clear
ccuConfigureSlice(0,
ccuEvent1(EVIS_INyI, EVEM_RISING, EVLM_HIGH, EVLPFM_0),
STRTS_EV1,
CMOD_COMPARE | CLST_ENABLE | STRM_BOTH,
PSC_FCCU_16, // Prescaler: 64MHz / 16 = 4MHz
99, 50, // 40kHz 50%
0, 0, // No interrupts
0); // Passive level low
// Slice 1: Capture.
// Event 0: 3 clock LPF, active high, rising edge, input B (P0.7)
// Capture on event 0.
// Event 1: active high, rising edge, input I (SCU.GSC40)
// Clear the timer (STRM) and start on event 1.
ccuConfigureSlice(1,
ccuEvent0(EVIS_INyB, EVEM_RISING, EVLM_HIGH, EVLPFM_3) |
ccuEvent1(EVIS_INyI, EVEM_RISING, EVLM_HIGH, EVLPFM_0),
CAP0S_EV0 | STRTS_EV1,
CMOD_CAPTURE | STRM_BOTH,
PSC_FCCU_16, // Prescaler: 64MHz / 16 = 4MHz
0xffff, 0xffff,
INTE_E0AE_ENABLE,
SRS_E0SR_SR0, // Event 0 generates interrupt SR0
0); // Passive level low
// CCU40 OUT0 is connected to P0.0, P0.5, P0.6, P1.0, P2.0.
// P0.6: open drain PWM output. (CCU4.OUT0)
// P1.0: push pull PWM output (LED). (CCU4.OUT0)
// P0.7 pull up input to CCU slice 1 trigger capture.
enablePin(1, 0, GPIO_OUT_PP_ALT2); // LED P1.0 alt2 is CCU4.OUT0
enablePin(0, 6, GPIO_OUT_PP_ALT4); // P0.6 alt4 is CCU4.OUT0
enablePin(0, 7, GPIO_IN_PU);
// Clock = 64MHz so 8000000 - 1 is 8 systicks/second.
systickEnable(8000000 - 1);
enable_interrupts();
// Start CCU slices 0 and 1
ccuStartSlices(BIT1 | BIT0);
while(1)
{
asm("wfi");
}
return 0;
}
