stm32f4-discoveryの作法その12

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stm32f4-discovery timer ラジオ am変調 timer テキストリンク

概要

stm32f4-discoveryの作法、調べてみた。
AMラジオを鳴らしてみた。

写真

サンプルコード

#include "stm32f4_discovery.h"

volatile uint64_t ksystick;
uint64_t micros(void)
{
    return ksystick;
}
void SysTick_Handler(void)
{
    ksystick++;
}
void delaym(__IO uint32_t n)
{
    uint64_t p;
    p = micros() + n;
    while (p > micros())
    {
    }
}
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
#define CLOCK       (1000000/8)
#define UA          1
#define SILO        2
#define DO          3
#define DOSH        4
#define RE          5
#define RESH        6
#define MI          7
#define FA          8
#define FASH        9
#define SO          10
#define SOSH        11
#define LA          12
#define SIFL        13
#define SI          14
#define DOHI        15
#define DOHS        16
#define REHI        17
#define REHS        18
#define MIHI        19
#define FAHI        20
#define FAHS        21
#define END     0x00
#define OFF     0x01
#define T03     3
#define T06     6
#define T09     9
#define NOTE        32
int radioPin = 11;
const unsigned char musicData[] = {
    DO, T03,
    FA, T03,
    FA, T09,
    FA, T03,
    MI, T03,
    RE, T03,
    DO, T03,
    RE, T09,
    DO, T03,
    DO, T03,
    UA, T03,
    DO, T03,
    RE, T06,
    RE, T03,
    RE, T03,
    RE, T03,
    FA, T03,
    RE, T03,
    MI, T06,
    UA, T03,
    OFF, T03,

    UA, T03,
    DO, T03,
    RE, T06,
    RE, T03,
    FA, T03,
    SO, T06,
    FA, T03,
    MI, T03,
    FA, T06,
    MI, T03,
    RE, T03,
    RE, T06,
    DO, T03,
    RE, T06,
    RE, T03,
    RE, T03,
    LA, T03,
    FA, T03,
    LA, T03,
    SO, T09,
    OFF,T03,

    DO, T03,
    FA, T09,
    FA, T03,
    FA, T03,
    MI, T03,
    RE, T03,
    DO, T03,
    RE, T09,
    DO, T03,
    DO, T03,
    UA, T06,
    DO, T03,
    RE, T03,
    RE, T06,
    RE, T03,
    RE, T03,
    FA, T03,
    RE, T03,
    MI, T03,
    UA, T06,
    OFF, T03,

    UA, T03,
    DO, T03,
    RE, T06,
    RE, T03,
    FA, T03,
    SO, T06,
    FA, T03,
    MI, T03,
    FA, T06,
    MI, T03,
    RE, T03,
    RE, T06,
    DO, T03,
    RE, T06,
    RE, T03,
    RE, T03,
    LA, T03,
    FA, T03,
    LA, T03,
    SO, T09,
    END,T03
};
void playTone(uint8_t tone, uint8_t tempo)
{
    int i,
        hz,
        itone;
    switch (tone)
    {
    case UA:
        hz = 466 / NOTE;
        itone = ((int) (CLOCK / 466)) << 3;
    break;
    case SILO:
        hz = 493 / NOTE;
        itone = ((int) (CLOCK / 493)) << 3;
    break;
    case DO:
        hz = 523 / NOTE;
        itone = ((int) (CLOCK / 523)) << 3;
    break;
    case DOSH:
        hz = 554 / NOTE;
        itone = ((int) (CLOCK / 554)) << 3;
    break;
    case RE:
        hz = 587 / NOTE;
        itone = ((int) (CLOCK / 587)) << 3;
    break;
    case RESH:
        hz = 622 / NOTE;
        itone = ((int) (CLOCK / 622)) << 3;
    break;
    case MI:
        hz = 659 / NOTE;
        itone = ((int) (CLOCK / 659)) << 3;
    break;
    case FA:
        hz = 698 / NOTE;
        itone = ((int) (CLOCK / 698)) << 3;
    break;
    case FASH:
        hz = 739 / NOTE;
        itone = ((int) (CLOCK / 739)) << 3;
    break;
    case SO:
        hz = 783 / NOTE;
        itone = ((int) (CLOCK / 783)) << 3;
    break;
    case SOSH:
        hz = 830 / NOTE;
        itone = ((int) (CLOCK / 830)) << 3;
    break;
    case LA:
        hz = 880 / NOTE;
        itone = ((int) (CLOCK / 880)) << 3;
    break;
    case SIFL:
        hz = 932 / NOTE;
        itone = ((int) (CLOCK / 932)) << 3;
    break;
    case SI:
        hz = 987 / NOTE;
        itone = ((int) (CLOCK / 987)) << 3;
    break;
    case DOHI:
        hz = 1046 / NOTE;
        itone = ((int) (CLOCK / 1046)) << 3;
    break;
    case DOHS:
        hz = 1108 / NOTE;
        itone = ((int) (CLOCK / 1108)) << 3;
    break;
    case REHI:
        hz = 1174 / NOTE;
        itone = ((int) (CLOCK / 1174)) << 3;
    break;
    case REHS:
        hz = 1244 / NOTE;
        itone = ((int) (CLOCK / 1244)) << 3;
    break;
    case MIHI:
        hz = 1318 / NOTE;
        itone = ((int) (CLOCK / 1318)) << 3;
    break;
    case FAHI:
        hz = 1396 / NOTE;
        itone = ((int) (CLOCK / 1396)) << 3;
    break;
    case FAHS:
        hz = 1480 / NOTE;
        itone = ((int) (CLOCK / 1480)) << 3;
    break;
    default:
        hz = 880 / NOTE;
        itone = ((int) (CLOCK / 880)) << 3;
    break;
    }
    for ( ; tempo > 0; tempo--)
    {
        if ((tone == OFF) || (tone == END))
        {
            delaym(1000000 / NOTE);
        }
        else
        {
            for (i = 0; i < hz; i++)
            {
                TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable;
                TIM_OC1Init(TIM3, &TIM_OCInitStructure);
                delaym(itone);
                TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
                TIM_OC1Init(TIM3, &TIM_OCInitStructure);
                delaym(itone);
            }
        }
    }
    delaym(50000);
}
void loop()
{
    unsigned int i;
    uint8_t tone,
        tempo;
    i = 0;
    tone = OFF;
    while (tone != END)
    {
        tone = musicData[i];
        i++;
        tempo = musicData[i];
        i++;
        playTone(tone, tempo);
    }
}
int main(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOC, &GPIO_InitStructure); 
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_TIM3);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
    TIM_TimeBaseStructure.TIM_Period = 12 - 1;
    TIM_TimeBaseStructure.TIM_Prescaler = 5 - 1;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 1;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Disable);
    TIM_Cmd(TIM3, ENABLE);
    RCC_ClocksTypeDef RCC_Clocks;
    RCC_GetClocksFreq(&RCC_Clocks);
    SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000000);
    loop();
}

以上。

Author And Source

この問題について(stm32f4-discoveryの作法その12), 我々は、より多くの情報をここで見つけました https://qiita.com/ohisama@github/items/f0ceb23d71921556ec8d

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stm32f4-discoveryの作法 その12

概要

写真

サンプルコード

Author And Source

stm32f4-discoveryの作法その12