mirror of
https://github.com/IcedRooibos/py32f0-template.git
synced 2025-10-31 01:42:04 -07:00
110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/***
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* Demo: TIM1 DMA
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*
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*/
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#include "main.h"
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#include "py32f0xx_bsp_printf.h"
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uint32_t TIM1ReloadCounter[9] = {900-1,800-1,700-1,600-1,500-1,400-1,300-1,200-1,100-1};
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static void APP_GPIOConfig(void);
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static void APP_SystemClockConfig(void);
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static void APP_TIM1Config(void);
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static void APP_DMAConfig(void);
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int main(void)
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{
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APP_SystemClockConfig();
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APP_GPIOConfig();
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BSP_USART_Config(115200);
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printf("TIM1 DMA Demo\r\nClock: %ld\r\n", SystemCoreClock);
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APP_TIM1Config();
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APP_DMAConfig();
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while (1);
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}
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static void APP_TIM1Config(void)
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{
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LL_TIM_InitTypeDef TIM1CountInit = {0};
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LL_APB1_GRP2_EnableClock(RCC_APBENR2_TIM1EN);
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TIM1CountInit.ClockDivision = LL_TIM_CLOCKDIVISION_DIV1;
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TIM1CountInit.CounterMode = LL_TIM_COUNTERMODE_UP;
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/* Start with 1 second interval (at 8MHz) */
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TIM1CountInit.Prescaler = 8000-1;
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TIM1CountInit.Autoreload = 1000-1;
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TIM1CountInit.RepetitionCounter = 0;
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LL_TIM_Init(TIM1,&TIM1CountInit);
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LL_TIM_EnableIT_UPDATE(TIM1);
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LL_TIM_EnableDMAReq_UPDATE(TIM1);
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LL_TIM_EnableCounter(TIM1);
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NVIC_EnableIRQ(TIM1_BRK_UP_TRG_COM_IRQn);
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NVIC_SetPriority(TIM1_BRK_UP_TRG_COM_IRQn,0);
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}
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static void APP_DMAConfig(void)
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{
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LL_DMA_InitTypeDef DMA_TIM1Reload ={0};
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LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA1);
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LL_APB1_GRP2_EnableClock(LL_APB1_GRP2_PERIPH_SYSCFG);
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DMA_TIM1Reload.PeriphOrM2MSrcAddress = (uint32_t)&(TIM1->ARR);
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DMA_TIM1Reload.MemoryOrM2MDstAddress = (uint32_t)TIM1ReloadCounter;
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DMA_TIM1Reload.Direction = LL_DMA_DIRECTION_MEMORY_TO_PERIPH;
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DMA_TIM1Reload.Mode = LL_DMA_MODE_NORMAL;
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DMA_TIM1Reload.PeriphOrM2MSrcIncMode = LL_DMA_PERIPH_NOINCREMENT;
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DMA_TIM1Reload.MemoryOrM2MDstIncMode = LL_DMA_MEMORY_INCREMENT;
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DMA_TIM1Reload.PeriphOrM2MSrcDataSize = LL_DMA_PDATAALIGN_WORD;
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DMA_TIM1Reload.MemoryOrM2MDstDataSize = LL_DMA_MDATAALIGN_WORD;
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DMA_TIM1Reload.NbData = 9;
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DMA_TIM1Reload.Priority = LL_DMA_PRIORITY_MEDIUM;
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LL_DMA_Init(DMA1,LL_DMA_CHANNEL_1,&DMA_TIM1Reload);
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/* Remap TIM1 update to DMA channel 1 */
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LL_SYSCFG_SetDMARemap_CH1(LL_SYSCFG_DMA_MAP_TIM1_UP);
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LL_DMA_EnableIT_TC(DMA1,LL_DMA_CHANNEL_1);
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LL_DMA_EnableChannel(DMA1,LL_DMA_CHANNEL_1);
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NVIC_EnableIRQ(DMA1_Channel1_IRQn);
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NVIC_SetPriority(DMA1_Channel1_IRQn,0);
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}
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static void APP_SystemClockConfig(void)
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{
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LL_RCC_HSI_Enable();
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while(LL_RCC_HSI_IsReady() != 1);
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LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSISYS);
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while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSISYS);
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LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
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LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
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LL_Init1msTick(8000000);
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LL_SetSystemCoreClock(8000000);
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}
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static void APP_GPIOConfig(void)
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{
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/* Set PB5 as GPIO output */
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LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOB);
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LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_5, LL_GPIO_MODE_OUTPUT);
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}
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void APP_TIM1UpdateCallback(void)
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{
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LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_5);
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}
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void APP_ErrorHandler(void)
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{
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while (1);
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}
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