main.c

Go to the documentation of this file.

 
#include <stdint.h>
 
#include "ra8_attributes.h"
#include "ra8_board_ek_ra8d2.h"
#include "ra8_boot_entry.h"
#include "ra8_cgc.h"
#include "ra8_dac_b.h"
#include "ra8_err.h"
#include "ra8_isr.h"
#include "ra8_time.h"

typedef enum : uint16_t {
  k_dac_demo_channel  = 0U,    
  k_dac_demo_steps    = 64U,   
  k_dac_demo_step_ms  = 1U,    
  k_dac_demo_max_code = 4095U, 
} dac_demo_const_t;

volatile uint32_t g_dac_waveform_tick = 0U;

RA8_INTERNAL static void internal_dac_demo_panic_halt(void)
{
  while (1) {
    __asm__ volatile("wfi");
  }
}

RA8_INTERNAL static void internal_dac_demo_setup_or_halt(void)
{
  uint32_t cpuclk0_hz = 0U;
  if (ra8_cgc_init() != k_ra8_ok) {
    internal_dac_demo_panic_halt();
  }
  if (ra8_cgc_get_clock_hz(k_ra8_clock_id_cpuclk0, &cpuclk0_hz) != k_ra8_ok) {
    internal_dac_demo_panic_halt();
  }
  if (ra8_time_init(cpuclk0_hz) != k_ra8_ok) {
    internal_dac_demo_panic_halt();
  }
  const ra8_dac_b_cfg_t cfg = {
    .vref                    = k_ra8_dac_b_vref_normal,
    .data_format             = k_ra8_dac_b_format_right,
    .internal_output_enabled = false,
    .enable_channel0         = true,
    .enable_channel1         = false,
  };
  if (ra8_dac_b_init_configured(&cfg) != k_ra8_ok) {
    internal_dac_demo_panic_halt();
  }
}

[[nodiscard]] RA8_INTERNAL static ra8_err_t internal_dac_demo_one_triangle_period(void)
{
  const uint16_t step = (uint16_t)((uint32_t)k_dac_demo_max_code / (uint32_t)k_dac_demo_steps);
  for (uint16_t i = 0U; i < (uint16_t)k_dac_demo_steps; ++i) {
    const uint16_t code = (uint16_t)(i * step);
    if (ra8_dac_b_write((uint8_t)k_dac_demo_channel, code) != k_ra8_ok) {
      return k_ra8_err_hw_error;
    }
    ra8_delay_ms((uint32_t)k_dac_demo_step_ms);
  }
  for (uint16_t i = (uint16_t)k_dac_demo_steps; i > 0U; --i) {
    const uint16_t code = (uint16_t)((i - 1U) * step);
    if (ra8_dac_b_write((uint8_t)k_dac_demo_channel, code) != k_ra8_ok) {
      return k_ra8_err_hw_error;
    }
    ra8_delay_ms((uint32_t)k_dac_demo_step_ms);
  }
  return k_ra8_ok;
}
 
void main(void)
{
  internal_dac_demo_setup_or_halt();
  ra8_isr_globals_enable();
  while (1) {
    if (internal_dac_demo_one_triangle_period() != k_ra8_ok) {
      break;
    }
    g_dac_waveform_tick += 1U;
  }
  internal_dac_demo_panic_halt();
}