void main(){
unsigned int int_val;
unsigned int prev_temp, curr_temp = 0;
/* Configure INTC */
intc_config();
/* Configure timer or PWM */
pwm_config(time);
/* Clear all GPO values */
__R30 = 0x00000000;
/* Detect interrupt from Slave PRU that configuration complete */
while((__R31 & 0x80000000) == 0){
}
/* Clear system event */
CT_INTC.SECR0 = (1 << PRU_SLAVE_MASTER_EVT);
/* Kick off PWM timer */
CT_ECAP.ECCTL2 |= 0x10; // Run counter (TSCTRSTOP = 1)
while(1){
/* Detect interrupt */
while((__R31 & 0x80000000) == 0){
}
/* Identify highest priority event */
int_val = CT_INTC.HIPIR1;
/* PRU eCAP event */
if(int_val == PRU_ECAP_EVT){
/* Interrupt PRU slave to issue read temp */
PRU_MASTER_SLAVE_EVT_TRIGGER;
/* This line was added to enable setting a breakpoint in the the PRU slave event service routine */
CT_ECAP.ECCTL2 &= 0xFFEF; // Stop counter (TSCTRSTOP = 0)
/* Clear system event */
CT_ECAP.ECCLR |= 0x40; // (PRDEQ = 1)
CT_ECAP.ECCLR |= 0x1; // (INT = 1)
CT_INTC.SECR0 = (1 << PRU_ECAP_EVT);
}
/* PRU slave event */
if(int_val == PRU_SLAVE_MASTER_EVT){
/* Clear system event */
CT_INTC.SECR0 = (1 << PRU_SLAVE_MASTER_EVT);
/* Read temperature value in Shared RAM */
curr_temp = (((unsigned int)TEMP_SENSOR_BUF.MSB << 8) | (unsigned int)TEMP_SENSOR_BUF.LSB);
/* Compare current temp with previous temp */
/* Temperature rising */
if(curr_temp > prev_temp){
/* Set red LED */
__R30 &= ~(GPIO_BLUE);
__R30 ^= GPIO_RED;
}
/* Temperature falling */
if(curr_temp < prev_temp){
/* Set blue LED */
__R30 &= ~(GPIO_RED);
__R30 ^= GPIO_BLUE;
}
/* Temperature constant */
if(curr_temp == prev_temp){
/* Turn off all LEDs */
__R30 &= ~(GPIO_RED);
__R30 &= ~(GPIO_BLUE);
}
/* Store current temp as previous temp */
prev_temp = curr_temp;
/* This line was added to enable setting a breakpoint in the the PRU slave event service routine */
CT_ECAP.CAP1_bit.CAP1 = time * 200000000;
CT_ECAP.ECCTL2 |= 0x10; // Run counter (TSCTRSTOP = 1)
}
}
}
void main(void)
{
int i = 0;
volatile uint16_t dataA = 0;
volatile uint16_t dataB = 0;
/* Clear SYSCFG[STANDBY_INIT] to enable OCP master port */
CT_CFG.SYSCFG_bit.STANDBY_INIT = 0;
/* Select OCP_CLK as IEP clock source */
CT_CFG.IEPCLK_bit.OCP_EN = 0x1;
iep_timer_config();
intc_config();
CT_IEP.TMR_GLB_CFG_bit.CNT_EN = 0x1;
/* Setting PRU1 GPO Clk Dividers to 12.5 and 2 to get 8 MHz CLK */
CT_CFG.GPCFG1_bit.PRU1_GPO_DIV0 = 0x17;
CT_CFG.GPCFG1_bit.PRU1_GPO_DIV1 = 0x02;
/* Init the configure registers and put them in shift out mode */
CT_CFG.GPCFG1_bit.PRU1_GPO_MODE = PRU1_GPO_MODE_SERIAL;
/* Init PRU1 GPO to 0 */
__R30 = 0x0;
SH0_Load(0);
SH1_Load(0);
/* Enable PRU1 GPO shift out */
__R30 |= SHIFT_ENABLE_FLAG << SHIFT_ENABLE_SHIFT;
while (1) {
for (i = 0; i < 0xFF; i++) {
/* Poll until R31.30 is set */
do {
while ((__R31 & 0x40000000) == 0) {
}
/* Verify that the IEP is the source of the interrupt */
} while (CT_INTC.HIPIR0 != PRU_IEP_EVT);
/* Clear Compare0 status */
CT_IEP.TMR_CMP_STS = 0x1;
__delay_cycles(2);
/* Clear the status of the interrupt */
CT_INTC.SECR0 = (1 << PRU_IEP_EVT);
/* Format sine wave data for DAC */
dataA = DAC_Cmd(DAC_A_ADDRESS, WRITE_NO_UPDATE, SineRaw[i]);
/* Swap data endian from LSB first to MSB first per DAC format*/
dataA = Endian_Swap(dataA);
/* Load data into Shadow Register 0 */
SH0_Load(dataA);
while (!(CT_CFG.GPCFG1 & PRU1_GPO_SH_SEL_MASK));
/* Wait for SH Flag to indicate SH0 being output */
while ((CT_CFG.GPCFG1 & PRU1_GPO_SH_SEL_MASK));
/* Generate sync signal */
__R30 |= 0x0004;
__delay_cycles(2);
__R30 &= ~0x4;
/* Format sine wave data for DAC */
dataB = DAC_Cmd(DAC_B_ADDRESS, WRITE_UPDATE, SineRaw[i]);
/* Swap data endian from LSB first to MSB first per DAC format */
dataB = Endian_Swap(dataB);
/* Load data into Shadow Register 1 */
SH1_Load(dataB);
/* Wait for SH Flag to indicate SH1 being output */
while (!(CT_CFG.GPCFG1 & PRU1_GPO_SH_SEL_MASK));
/* Generate sync signal */
__R30 |= 0x0004;
__delay_cycles(2);
__R30 &= ~0x4;
}
}
}
