Conquering the STM32F4 on the discovery board step-by-step. Commit history is tutorialesque, but not clean of course.
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/*
* cppmain.cc
*
* Created on: Jul 4, 2023
* Author: heck
*/
#include "cppmain.h"
#include "main.h"
#include "usbd_cdc_if.h"
#include "dac.h"
#include <cmath>
#include <functional>
#include <iostream>
#include "limits"
const double pi{ std::acos(-1) };
// Serial Logging
// --------------
void log(const std::string &msg)
{
std::string out{ msg };
out.append("\r\n");
CDC_Transmit_FS((uint8_t *)out.data(), out.size());
}
void log(std::string &&msg)
{
log(msg);
}
// DAC
// ---
void set_dac_1(uint32_t val)
{
HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_12B_L, val);
}
void set_dac_2(uint32_t val)
{
HAL_DAC_SetValue(&hdac, DAC_CHANNEL_2, DAC_ALIGN_12B_L, val);
}
// LED
// ---
void led_green_toggle()
{
HAL_GPIO_TogglePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin);
}
void led_green_on()
{
HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin, GPIO_PIN_SET);
}
void led_green_off()
{
HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin, GPIO_PIN_RESET);
}
// MAIN
// ----
void irq1()
{
led_green_toggle();
}
void cppmain(void)
{
HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
long t{ 0 };
while (true) {
unsigned char res = t * ((t >> 12 | t >> 8) & 63 & t >> 4);
set_dac_1((res % 256) * 100);
for (int g = 0; g < 600000; g++) {}
t++;
t %= (std::numeric_limits<long>::max() - 1);
}
}