#include "wav_player_hal.h" #include <stm32wbxx_ll_tim.h> #include <stm32wbxx_ll_dma.h> #include <stm32wbxx_ll_gpio.h> #include <furi_hal.h> #include <furi_hal_gpio.h> #include <furi_hal_resources.h> //#define FURI_HAL_SPEAKER_TIMER TIM16 #define FURI_HAL_SPEAKER_TIMER TIM16 #define SAMPLE_RATE_TIMER TIM2 #define FURI_HAL_SPEAKER_CHANNEL LL_TIM_CHANNEL_CH1 #define DMA_INSTANCE DMA1, LL_DMA_CHANNEL_1 void wav_player_speaker_init(uint32_t sample_rate) { // Enable bus furi_hal_bus_enable(FuriHalBusTIM2); LL_TIM_InitTypeDef TIM_InitStruct = {0}; //TIM_InitStruct.Prescaler = 4; TIM_InitStruct.Prescaler = 1; TIM_InitStruct.Autoreload = 255; //in this fork used purely as PWM timer, the DMA now is triggered by SAMPLE_RATE_TIMER LL_TIM_Init(FURI_HAL_SPEAKER_TIMER, &TIM_InitStruct); LL_TIM_OC_InitTypeDef TIM_OC_InitStruct = {0}; TIM_OC_InitStruct.OCMode = LL_TIM_OCMODE_PWM1; TIM_OC_InitStruct.OCState = LL_TIM_OCSTATE_ENABLE; TIM_OC_InitStruct.CompareValue = 127; LL_TIM_OC_Init(FURI_HAL_SPEAKER_TIMER, FURI_HAL_SPEAKER_CHANNEL, &TIM_OC_InitStruct); //====================================================== TIM_InitStruct.Prescaler = 0; //TIM_InitStruct.Autoreload = 1451; //64 000 000 / 1451 ~= 44100 Hz TIM_InitStruct.Autoreload = 64000000 / sample_rate - 1; //to support various sample rates LL_TIM_Init(SAMPLE_RATE_TIMER, &TIM_InitStruct); //LL_TIM_OC_InitTypeDef TIM_OC_InitStruct = {0}; TIM_OC_InitStruct.OCMode = LL_TIM_OCMODE_PWM1; TIM_OC_InitStruct.OCState = LL_TIM_OCSTATE_ENABLE; TIM_OC_InitStruct.CompareValue = 127; LL_TIM_OC_Init(SAMPLE_RATE_TIMER, FURI_HAL_SPEAKER_CHANNEL, &TIM_OC_InitStruct); //========================================================= //configuring PA6 pin as TIM16 output furi_hal_gpio_init_ex( &gpio_ext_pa6, GpioModeAltFunctionPushPull, GpioPullNo, GpioSpeedVeryHigh, GpioAltFn14TIM16); } void wav_player_hal_deinit() { furi_hal_gpio_init(&gpio_ext_pa6, GpioModeAnalog, GpioPullNo, GpioSpeedLow); // Disable bus furi_hal_bus_disable(FuriHalBusTIM2); } void wav_player_speaker_start() { LL_TIM_EnableAllOutputs(FURI_HAL_SPEAKER_TIMER); LL_TIM_EnableCounter(FURI_HAL_SPEAKER_TIMER); LL_TIM_EnableAllOutputs(SAMPLE_RATE_TIMER); LL_TIM_EnableCounter(SAMPLE_RATE_TIMER); } void wav_player_speaker_stop() { LL_TIM_DisableAllOutputs(FURI_HAL_SPEAKER_TIMER); LL_TIM_DisableCounter(FURI_HAL_SPEAKER_TIMER); LL_TIM_DisableAllOutputs(SAMPLE_RATE_TIMER); LL_TIM_DisableCounter(SAMPLE_RATE_TIMER); } void wav_player_dma_init(uint32_t address, size_t size) { uint32_t dma_dst = (uint32_t) & (FURI_HAL_SPEAKER_TIMER->CCR1); LL_DMA_ConfigAddresses(DMA_INSTANCE, address, dma_dst, LL_DMA_DIRECTION_MEMORY_TO_PERIPH); LL_DMA_SetDataLength(DMA_INSTANCE, size); LL_DMA_SetPeriphRequest(DMA_INSTANCE, LL_DMAMUX_REQ_TIM2_UP); LL_DMA_SetDataTransferDirection(DMA_INSTANCE, LL_DMA_DIRECTION_MEMORY_TO_PERIPH); LL_DMA_SetChannelPriorityLevel(DMA_INSTANCE, LL_DMA_PRIORITY_VERYHIGH); LL_DMA_SetMode(DMA_INSTANCE, LL_DMA_MODE_CIRCULAR); LL_DMA_SetPeriphIncMode(DMA_INSTANCE, LL_DMA_PERIPH_NOINCREMENT); LL_DMA_SetMemoryIncMode(DMA_INSTANCE, LL_DMA_MEMORY_INCREMENT); LL_DMA_SetPeriphSize(DMA_INSTANCE, LL_DMA_PDATAALIGN_HALFWORD); LL_DMA_SetMemorySize(DMA_INSTANCE, LL_DMA_MDATAALIGN_HALFWORD); LL_DMA_EnableIT_TC(DMA_INSTANCE); LL_DMA_EnableIT_HT(DMA_INSTANCE); } void wav_player_dma_start() { LL_DMA_EnableChannel(DMA_INSTANCE); LL_TIM_EnableDMAReq_UPDATE(SAMPLE_RATE_TIMER); } void wav_player_dma_stop() { LL_DMA_DisableChannel(DMA_INSTANCE); }