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 "tim.h"
#include <cmath>
#include <functional>
#include <iostream>
#include "limits"
const double pi{ std::acos(-1) };
#define NS 128
uint32_t Wave_LUT[NS] = {
2048, 2149, 2250, 2350, 2450, 2549, 2646, 2742, 2837, 2929, 3020, 3108, 3193, 3275, 3355, 3431,
3504, 3574, 3639, 3701, 3759, 3812, 3861, 3906, 3946, 3982, 4013, 4039, 4060, 4076, 4087, 4094,
4095, 4091, 4082, 4069, 4050, 4026, 3998, 3965, 3927, 3884, 3837, 3786, 3730, 3671, 3607, 3539,
3468, 3394, 3316, 3235, 3151, 3064, 2975, 2883, 2790, 2695, 2598, 2500, 2400, 2300, 2199, 2098,
1997, 1896, 1795, 1695, 1595, 1497, 1400, 1305, 1212, 1120, 1031, 944, 860, 779, 701, 627,
556, 488, 424, 365, 309, 258, 211, 168, 130, 97, 69, 45, 26, 13, 4, 0,
1, 8, 19, 35, 56, 82, 113, 149, 189, 234, 283, 336, 394, 456, 521, 591,
664, 740, 820, 902, 987, 1075, 1166, 1258, 1353, 1449, 1546, 1645, 1745, 1845, 1946, 2047
};
// 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(uint16_t val)
{
HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_12B_R, val);
}
void set_dac_2(uint16_t val)
{
HAL_DAC_SetValue(&hdac, DAC_CHANNEL_2, DAC_ALIGN_12B_R, 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);
}
void dac1_toggle()
{
static bool dac_state{ 0 };
dac_state = !dac_state;
if (dac_state) {
set_dac_1(0b0000111111111111);
} else {
set_dac_1(0b0000000000000000);
}
}
// MAIN
// ----
void heck_irq1()
{
led_green_toggle();
}
void heck_timer_cb()
{
// dac1_toggle();
led_green_toggle();
log("timerUP");
}
// dont forget to start the DAC
// HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
void bytebeat()
{
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 < 60000; g++) {}
t++;
t %= (std::numeric_limits<long>::max() - 1);
}
}
void heck_cppmain(void)
{
// HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
// HAL_DAC_Start(&hdac, DAC_CHANNEL_2);
// HAL_TIM_Base_Start_IT(&htim2);
// gen LUT
HAL_TIM_Base_Start(&htim6);
while (true) {
log("huhu");
// HAL_Delay(5);
HAL_DAC_Start_DMA(&hdac, DAC_CHANNEL_1, (uint32_t *)Wave_LUT, 128, DAC_ALIGN_12B_R);
}
}
void heck_error_handler()
{
log("HECK ERRRRROR HANDLER");
}