mirror of
https://github.com/jhbruhn/eurorack.git
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117 lines
2.4 KiB
C++
117 lines
2.4 KiB
C++
#include <stm32f37x_conf.h>
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#include "drivers/display.h"
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#include "drivers/gpio.h"
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#include "stmlib/system/system_clock.h"
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#include "ui.h"
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using namespace stmlib;
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GPIO gpio;
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Display display;
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UI ui;
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//SystemClock system_clock;
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// Default interrupt handlers.
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extern "C" {
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void NMI_Handler() {}
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void HardFault_Handler()
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{
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while (1)
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;
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}
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void MemManage_Handler()
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{
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while (1)
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;
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}
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void BusFault_Handler()
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{
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while (1)
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;
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}
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void UsageFault_Handler()
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{
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while (1)
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;
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}
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void SVC_Handler() {}
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void DebugMon_Handler() {}
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void PendSV_Handler() {}
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// called every 1ms
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void SysTick_Handler()
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{
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IWDG_ReloadCounter();
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system_clock.Tick();
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}
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void TIM2_IRQHandler(void)
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{
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if (TIM_GetITStatus(TIM2, TIM_IT_Update) == RESET) {
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return;
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}
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TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
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// this will get called with 192 kHz (foof)
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// we want to reduce the amount of times the ui gets polled to 1kHz
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// which still is a lot (60fps would be enough tbh)
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static uint8_t count = 0;
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count++;
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if (count % 192 == 0) {
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ui.Update();
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count = 0;
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}
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}
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}
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void InitTimers(void)
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{
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
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TIM_TimeBaseInitTypeDef timer_init;
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timer_init.TIM_Period = F_CPU / (48000 * 4) - 1; // 192 kHz, 48kHz for each audio DAC
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timer_init.TIM_Prescaler = 0;
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timer_init.TIM_ClockDivision = TIM_CKD_DIV1;
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timer_init.TIM_CounterMode = TIM_CounterMode_Up;
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timer_init.TIM_RepetitionCounter = 0;
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//TIM_InternalClockConfig(TIM2);
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TIM_TimeBaseInit(TIM2, &timer_init);
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TIM_Cmd(TIM2, ENABLE);
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); // 2.2 priority split.
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// DAC interrupt is given highest priority
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NVIC_InitTypeDef timer_interrupt;
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timer_interrupt.NVIC_IRQChannel = TIM2_IRQn;
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timer_interrupt.NVIC_IRQChannelPreemptionPriority = 0;
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timer_interrupt.NVIC_IRQChannelSubPriority = 1;
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timer_interrupt.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&timer_interrupt);
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TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
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}
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void Init(void)
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{
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//SystemInit();
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NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x8000);
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IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
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IWDG_SetPrescaler(IWDG_Prescaler_16);
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
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system_clock.Init();
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SysTick_Config(F_CPU / 8000);
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IWDG_Enable();
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gpio.Init();
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asm("bkpt #0");
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display.Init();
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InitTimers();
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}
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int main(void)
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{
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Init();
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while (1) {
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//ui.Update();
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}
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}
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