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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <math.h>
#include "stm32f4xx_conf.h"
#include "audio.h"
/* Kernel includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "timers.h"
#include "semphr.h"
#include "cw.h"
// Private variables
volatile uint32_t time_var1, time_var2;
// Private function prototypes
void init();
// Tasks
static void detect_button_press(void *pvParameters);
static void audio_task(void *pvParameters);
struct cw_msg_s {
const char* msg;
int freq;
int dit_duration;
};
void vApplicationStackOverflowHook( TaskHandle_t xTask,
signed char *pcTaskName )
{
while (1) {};
}
int main(void) {
init();
cw_init(16000);
InitializeAudio(Audio16000HzSettings);
SetAudioVolume(128);
xTaskCreate(
detect_button_press,
"TaskButton",
4*configMINIMAL_STACK_SIZE,
(void*) NULL,
tskIDLE_PRIORITY + 2UL,
NULL);
xTaskCreate(
audio_task,
"TaskAudio",
configMINIMAL_STACK_SIZE,
(void*) NULL,
tskIDLE_PRIORITY + 2UL,
NULL);
/* Start the RTOS Scheduler */
vTaskStartScheduler();
/* HALT */
while(1);
}
static void detect_button_press(void *pvParameters)
{
int message_select = 0;
struct cw_msg_s msg1 = { "HB9G 1628M", 400, 100 };
struct cw_msg_s msg2 = { "HB9G JN36BK", 500, 100 };
struct cw_msg_s msg3 = { "HB9G U 12.5 73", 400, 130 };
GPIO_SetBits(GPIOD, GPIO_Pin_12);
while (1) {
if (GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0)>0) {
while (GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0) > 0) {
vTaskDelay(100 / portTICK_RATE_MS); /* Button Debounce Delay */
}
if (message_select == 0) {
GPIO_ResetBits(GPIOD, GPIO_Pin_12);
GPIO_SetBits(GPIOD, GPIO_Pin_15);
cw_push_message(msg1.msg, msg1.dit_duration, msg1.freq);
message_select++;
}
else if (message_select == 1) {
GPIO_SetBits(GPIOD, GPIO_Pin_12);
cw_push_message(msg2.msg, msg2.dit_duration, msg2.freq);
message_select++;
}
else if (message_select == 2) {
GPIO_ResetBits(GPIOD, GPIO_Pin_15);
cw_push_message(msg3.msg, msg3.dit_duration, msg3.freq);
message_select = 0;
}
while (GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0) == 0) {
vTaskDelay(100 / portTICK_RATE_MS); /* Button Debounce Delay */
}
}
taskYIELD();
}
}
static void audio_callback(void* context, int select_buffer)
{
static int16_t audio_buffer0[AUDIO_BUF_LEN];
static int16_t audio_buffer1[AUDIO_BUF_LEN];
int16_t *samples;
if (select_buffer == 0) {
samples = audio_buffer0;
GPIO_SetBits(GPIOD, GPIO_Pin_13);
GPIO_ResetBits(GPIOD, GPIO_Pin_14);
select_buffer = 1;
} else {
samples = audio_buffer1;
GPIO_SetBits(GPIOD, GPIO_Pin_14);
GPIO_ResetBits(GPIOD, GPIO_Pin_13);
select_buffer = 0;
}
size_t samples_len = cw_fill_buffer(samples, AUDIO_BUF_LEN);
if (samples_len == 0) {
for (int i = 0; i < AUDIO_BUF_LEN; i++) {
samples[i] = 0;
}
samples_len = AUDIO_BUF_LEN;
}
ProvideAudioBufferWithoutBlocking(samples, samples_len);
}
static void audio_task(void *pvParameters)
{
int select_buffer = 0;
PlayAudioWithCallback(audio_callback, NULL);
while (1) {
taskYIELD();
}
}
void init() {
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
// ---------- SysTick timer -------- //
if (SysTick_Config(SystemCoreClock / 1000)) {
// Capture error
while (1){};
}
// Enable full access to FPU (Should be done automatically in system_stm32f4xx.c):
//SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); // set CP10 and CP11 Full Access
// GPIOD Periph clock enable
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
// Configure PD12, PD13, PD14 and PD15 in output pushpull mode
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOD, &GPIO_InitStructure);
// Init PushButton
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// ------ UART ------ //
// Clock
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
// IO
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource5, GPIO_AF_USART1);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource6, GPIO_AF_USART1);
// Conf
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_Init(USART2, &USART_InitStructure);
// Enable
USART_Cmd(USART2, ENABLE);
}
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