void app_cpu_load_task(void)
{
static uint8_t bar_pos_last = 0;
uint8_t bar_pos;
/* Wait a total time > 250ms to update display each 250ms */
if ((app_cpu_load_time_active + app_cpu_load_time_sleep)
< ((32000lu / 256lu) * 250)) {
return;
}
/* Compute CPU load */
if (tc45_is_overflow(&TCC4)) {
tc45_clear_overflow(&TCC4);
bar_pos = DISPLAY_CPU_LOAD_PROBAR_MAX_SIZE_X;
} else {
bar_pos = (app_cpu_load_time_active *
DISPLAY_CPU_LOAD_PROBAR_MAX_SIZE_X)
/ (app_cpu_load_time_active +
app_cpu_load_time_sleep);
}
/* Update progress bar */
if (bar_pos_last < bar_pos) {
gfx_mono_draw_filled_rect(
DISPLAY_CPU_LOAD_PROBAR_POS_X + bar_pos_last,
DISPLAY_CPU_LOAD_PROBAR_POS_Y,
bar_pos - bar_pos_last,
DISPLAY_CPU_LOAD_PROBAR_SIZE_Y,
GFX_PIXEL_SET);
} else if (bar_pos_last > bar_pos) {
gfx_mono_draw_filled_rect(
DISPLAY_CPU_LOAD_PROBAR_POS_X + bar_pos,
DISPLAY_CPU_LOAD_PROBAR_POS_Y,
bar_pos_last - bar_pos,
DISPLAY_CPU_LOAD_PROBAR_SIZE_Y,
GFX_PIXEL_CLR);
}
bar_pos_last = bar_pos;
/* Reset counters */
app_cpu_load_time_active = 0;
app_cpu_load_time_sleep = 0;
}
/**
* \brief Timer Counter Overflow interrupt callback function
*
* This function is called when an overflow interrupt has occurred on
* TCC4 and toggles LED0.
*/
static void example_ovf_interrupt_callback(void)
{
gpio_toggle_pin(LED0_GPIO);
tc45_clear_overflow(&TCC4);
}
/**
* \brief Timer Counter Overflow interrupt callback function
*
* This function is called when an overflow interrupt has occurred (50ms) on
* TCD5 and change PWM duty single generation on TCD5 CCA.
*/
static void example_overflow_interrupt_callback(void)
{
tc45_write_cc(&TCD5, TC45_CCA,
tc45_read_cc(&TCD5, TC45_CCA) + 0xA00);
tc45_clear_overflow(&TCC4);
}
// Software PWM routine from AVR136
static void pwm_callback(void) {
static uint8_t portlevelA=PORTA_MASK, portlevelD=PORTD_MASK, portlevelR=PORTR_MASK;
static uint8_t softcount=0xFF;
// update outputs
PORTA.OUT = portlevelA;
PORTD.OUT = portlevelD;
PORTR.OUT = portlevelR;
// unrolled for speed -- process for NUM_CHANNELS
if (++softcount == 0) {
compare[0] = compbuff[0];
compare[1] = compbuff[1];
compare[2] = compbuff[2];
compare[3] = compbuff[3];
compare[4] = compbuff[4];
compare[5] = compbuff[5];
compare[6] = compbuff[6];
compare[7] = compbuff[7];
compare[8] = compbuff[8];
compare[9] = compbuff[9];
compare[10] = compbuff[10];
compare[11] = compbuff[11];
compare[12] = compbuff[12];
compare[13] = compbuff[13];
compare[14] = compbuff[14];
compare[15] = compbuff[15];
compare[16] = compbuff[16];
compare[17] = compbuff[17];
#ifdef PWM_SINK
// set all pins low
portlevelA &= ~PORTA_MASK;
portlevelD &= ~PORTD_MASK;
portlevelR &= ~PORTR_MASK;
#else
// set all pins high
portlevelA |= PORTA_MASK;
portlevelD |= PORTD_MASK;
portlevelR |= PORTR_MASK;
#endif
}
if (compare[0] == softcount) CH1_SET;
if (compare[1] == softcount) CH2_SET;
if (compare[2] == softcount) CH3_SET;
if (compare[3] == softcount) CH4_SET;
if (compare[4] == softcount) CH5_SET;
if (compare[5] == softcount) CH6_SET;
if (compare[6] == softcount) CH7_SET;
if (compare[7] == softcount) CH8_SET;
if (compare[8] == softcount) CH9_SET;
if (compare[9] == softcount) CH10_SET;
if (compare[10] == softcount) CH11_SET;
if (compare[11] == softcount) CH12_SET;
if (compare[12] == softcount) CH13_SET;
if (compare[13] == softcount) CH14_SET;
if (compare[14] == softcount) CH15_SET;
if (compare[15] == softcount) CH16_SET;
if (compare[16] == softcount) CH17_SET;
if (compare[17] == softcount) CH18_SET;
tc45_clear_overflow(&TCC4);
}
