TIM_DMABurstLength_9Bytes TIM_DMABurstLength_10Bytes TIM_DMABurstLength_11Bytes TIM_DMABurstLength_12Bytes TIM_DMABurstLength_13Bytes TIM_DMABurstLength_14Bytes TIM_DMABurstLength_15Bytes TIM_DMABurstLength_16Bytes TIM_DMABurstLength_17Bytes TIM_DMABurstLength_18Bytes TIM DMA连续传送长度9字 TIM DMA连续传送长度10字 TIM DMA连续传送长度11字 TIM DMA连续传送长度12字 TIM DMA连续传送长度13字 TIM DMA连续传送长度14字 TIM DMA连续传送长度15字 TIM DMA连续传送长度16字 TIM DMA连续传送长度17字 TIM DMA连续传送长度18字 0x0800 0x0900 0x0A00 0x0B00 0x0C00 0x0D00 0x0E00 0x0F00 0x1000 0x1100 例：
/* Configures the TIM2 DMA Interface to transfer 1 byte and to use the CCR1 as base address */
TIM_DMAConfig(TIM2, TIM_DMABase_CCR1, TIM_DMABurstLength_1Byte) 函数原型如下：
void TIM_DMAConfig(TIM_TypeDef* TIMx, u16 TIM_DMABase, u16 TIM_DMABurstLength) {
/* Check the parameters */
assert_param(IS_TIM_123458_PERIPH(TIMx)); assert_param(IS_TIM_DMA_BASE(TIM_DMABase));
assert_param(IS_TIM_DMA_LENGTH(TIM_DMABurstLength));
/* Set the DMA Base and the DMA Burst Length */ TIMx->DCR = TIM_DMABase | TIM_DMABurstLength; }
19.2.11 函数TIM_DMACmd
Table 485. 函数TIM_DMACmd 函数名 TIM_DMACmd void TIM_DMACmd(TIM_TypeDef* TIMx, u16 TIM_DMASource, 函数原形 FunctionalState Newstate) 功能描述 使能或者失能指定的TIMx的DMA请求 输入参数1 TIMx：x可以是1,2,3,4,5,8来选择TIM外设 输入参数2 TIM_DMASource：待使能或者失能的TIM中断源 NewState：DMA请求的新状态 输入参数3 这个参数可以取：ENABLE或DISABLE 输出参数 无 返回值 无 先决条件 无 被调用函数 无 TIM_DMASource ：输入参数TIM_DMASource使能或者失能TIM的中断。可以取下表的值。 Table 486. TIM_DMASource值 参数TIM_DMASource值 TIM_DMA_Update TIM_DMA_CC1 TIM_DMA_CC2 TIM_DMA_CC3 TIM_DMA_CC4 TIM_DMA_COM TIM_DMA_Trigger 描述/DIER TIM更新DMA源允许 TIM捕获/比较1DMA源允许 TIM捕获/比较2DMA源允许 TIM捕获/比较3DMA源允许 TIM捕获/比较4DMA源请求 TIM COM的DMA请求源允许 TIM触发DMA源允许 #define值 位置 0x0100 0x0200 0x0400 0x0800 0x1000 0x2000 0x4000 bit8 bit9 bit10 bit11 bit12 bit13 bit14 例：
/* TIM2 Capture Compare 1 DMA Request Configuration */ TIM_DMACmd(TIM2, TIM_DMA_CC1, ENABLE); 函数原型如下：
void TIM_DMACmd(TIM_TypeDef* TIMx, u16 TIM_DMASource, FunctionalState NewState) {
/* Check the parameters */
assert_param(IS_TIM_ALL_PERIPH(TIMx));
assert_param(IS_TIM_DMA_SOURCE(TIM_DMASource));
assert_param(IS_TIM_PERIPH_DMA(TIMx, TIM_DMASource)); assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE) {
/* Enable the DMA sources */ TIMx->DIER |= TIM_DMASource; } else {
/* Disable the DMA sources */
TIMx->DIER &= (u16)~TIM_DMASource; } }
19.2.12 函数TIM_InternalClockConfig
Table 487. 函数TIM_InternalClockConfig 函数名 TIM_InternalClockConfig void TIM_DMACmd(TIM_TypeDef* TIMx, u16 TIM_DMASource, 函数原形 FunctionalState Newstate) 功能描述 设置TIMx内部时钟 输入参数 TIMx：x可以是1,2,3,4,5,8来选择TIM外设 输出参数 无 返回值 无 先决条件 无 被调用函数 无 例： /* Selects the internal clock for TIM2 */ TIM_InternalClockConfig(TIM2); 函数原型如下：
void TIM_InternalClockConfig(TIM_TypeDef* TIMx) {
/* Check the parameters */
assert_param(IS_TIM_123458_PERIPH(TIMx));
/* Disable slave mode to clock the prescaler directly with the internal clock */ TIMx->SMCR &= SMCR_SMS_Mask;
// #define SMCR_SMS_Mask ((u16)0xFFF8)//0b000：关闭从模式：预分频器直接由内部时钟驱动 }
19.2.13 函数TIM_ITRxExternalClockConfig
Table 488. 函数TIM_ITRxExternalClockConfig 函数名 TIM_ITRxExternalClockConfig void TIM_ITRxExternalClockConfig(TIM_TypeDef* TIMx, u16 函数原形 TIM_InputTriggerSource) 功能描述 设置TIMx内部触发为外部时钟模式 输入参数1 TIMx：x可以是2，3，4，来选择TIM外设 输入参数2 TIM_InputTriggerSource：输入触发源 输出参数 无 返回值 无 先决条件 无 被调用函数 无 TIM_InputTriggerSource：选择TIM输入触发。见Table 489. 参阅该参数的取值。 Table 489. TIM_InputTriggerSource值 TIM_InputTriggerSource 描述/SMCR.bit6-4 #define值 TIM_TS_ITR0 TIM内部触发0 0x0000 TIM_TS_ITR1 TIM内部触发1 0x0010 内部触发输入 TIM_TS_ITR2 TIM内部触发2 0x0020 TIM_TS_ITR3 TIM内部触发3 0x0030 TIM_TS_TI1F_ED TI1边缘检测 0x0040 TI1边缘检测 TIM_TS_TI1FP1 TI1滤波分频 0x0050 TI1滤波分频 TIM_TS_TI2FP2 TIM_TS_ETRF 例： TI2滤波分频 外部触发输入 0x0060 0x0070 TI2滤波分频 外部触发输入 /* TIM2 internal trigger 3 used as clock source */ TIM_ITRxExternalClockConfig(TIM2, TIM_TS_ITR3); 函数原型如下：
void TIM_ITRxExternalClockConfig(TIM_TypeDef* TIMx, u16 TIM_InputTriggerSource) {
/* Check the parameters */
assert_param(IS_TIM_123458_PERIPH(TIMx));
assert_param(IS_TIM_INTERNAL_TRIGGER_SELECTION(TIM_InputTriggerSource));
/* Select the Internal Trigger */
TIM_SelectInputTrigger(TIMx, TIM_InputTriggerSource);
/*
void TIM_SelectInputTrigger(TIM_TypeDef* TIMx, u16 TIM_InputTriggerSource) {
u16 tmpsmcr = 0;
/* Check the parameters */
assert_param(IS_TIM_123458_PERIPH(TIMx));
assert_param(IS_TIM_TRIGGER_SELECTION(TIM_InputTriggerSource));
/* Get the TIMx SMCR register value */ tmpsmcr = TIMx->SMCR;
/* Reset the TS Bits */
tmpsmcr &= SMCR_TS_Mask;// #define SMCR_TS_Mask ((u16)0xFF8F)
/* Set the Input Trigger source */ tmpsmcr |= TIM_InputTriggerSource;
/* Write to TIMx SMCR */ TIMx->SMCR = tmpsmcr; } */
/* Select the External clock mode1 */
TIMx->SMCR |= TIM_SlaveMode_External1;// #define TIM_SlaveMode_External1 ((u16)0x0007) 参数TIM_SlaveMode的定义 #define值 SMCR.SMS[2:0]/bit2-0 TIM_SlaveMode_Reset ((u16)0x0004) 复位模式 TIM_SlaveMode_Gated ((u16)0x0005) 门控模式 TIM_SlaveMode_Trigger ((u16)0x0006) 触发模式 TIM_SlaveMode_External1 ((u16)0x0007) 外部时钟模式1 }
19.2.14 函数TIM_TIxExternalClockConfig
Table 490. 函数TIM_TIxExternalClockConfig 函数名 TIM_TIxExternalClockConfig void TIM_TIxExternalClockConfig(TIM_TypeDef* TIMx, u16 函数原形 TIM_TIxExternalCLKSource, u8 TIM_ICPolarity, u8 ICFilter) 功能描述 设置TIMx触发为外部时钟 输入参数1 TIMx：x可以是1,2,3,4,5,8来选择TIM外设 输入参数2 TIM_ TIxExternalCLKSource：触发源 输入参数3 TIM_ ICPolarity：指定的 TI极性 输入参数4 ICFilter：指定的输入比较滤波器。数取值在 0x0-0xF之间。 输出参数 无 返回值 无 先决条件 无 被调用函数 无 TIM_TIxExternalCLKSource：选择TIMx外部时钟源。见Table 491. 参阅该参数的取值。 Table 491. TIM_TIxExternalCLKSource值 TIM_TIxExternalCLKSource 描述 #define值 TIM_TS_TI1FP1 TIM IC1连接到TI1 0x0050 TIM_TS_TI2FP2 TIM IC2连接到TI2 0x0060 TIM_TS_TI1F_ED TIM IC1连接到TI1：使用边沿探测 0x0040 例： /* Selects the TI1 as clock for TIM2: the external clock is connected to TI1 input pin, the rising edge is the active edge and no filter sampling is done (ICFilter = 0) */
TIM_TIxExternalClockConfig(TIM2, TIM_TS_TI1FP1, TIM_ICPolarity_Rising, 0); 函数原型如下：
void TIM_TIxExternalClockConfig(TIM_TypeDef* TIMx, u16 TIM_TIxExternalCLKSource, u16 TIM_ICPolarity, u16 ICFilter) {
/* Check the parameters */
assert_param(IS_TIM_123458_PERIPH(TIMx));
assert_param(IS_TIM_TIXCLK_SOURCE(TIM_TIxExternalCLKSource)); assert_param(IS_TIM_IC_POLARITY(TIM_ICPolarity)); assert_param(IS_TIM_IC_FILTER(ICFilter));
/* Configure the Timer Input Clock Source */
if (TIM_TIxExternalCLKSource == TIM_TIxExternalCLK1Source_TI2)
#define 的 TIM_TIxExternalCLKSource 值定义 备注/SMCR.TS[2:0]/bit6-4 TIM_TIxExternalCLK1Source_TI1 ((u16)0x0050) TIM IC1连接到TI1 TIM_TIxExternalCLK1Source_TI2 ((u16)0x0060) TIM IC2连接到TI2 TIM_TIxExternalCLK1Source_TI1ED ((u16)0x0040) TIM IC1连接到TI1：使用边沿探测 {
TI2_Config(TIMx, TIM_ICPolarity, TIM_ICSelection_DirectTI, ICFilter); } else {
TI1_Config(TIMx, TIM_ICPolarity, TIM_ICSelection_DirectTI, ICFilter); }
/* Select the Trigger source */
TIM_SelectInputTrigger(TIMx, TIM_TIxExternalCLKSource);
/* Select the External clock mode1 */ TIMx->SMCR |= TIM_SlaveMode_External1; 参数TIM_SlaveMode的定义 #define值 SMCR.SMS[2:0]/bit2-0 TIM_SlaveMode_Reset ((u16)0x0004) 复位模式 TIM_SlaveMode_Gated ((u16)0x0005) 门控模式 TIM_SlaveMode_Trigger ((u16)0x0006) 触发模式 TIM_SlaveMode_External1 ((u16)0x0007) 外部时钟模式1 }
/*TI2_Config函数定义如下：
static void TI2_Config(TIM_TypeDef* TIMx, u16 TIM_ICPolarity, u16 TIM_ICSelection, u16 TIM_ICFilter) {
u16 tmpccmr1 = 0, tmpccer = 0, tmp = 0;
/* Disable the Channel 2: Reset the CC2E Bit */ TIMx->CCER &= CCER_CC2E_Reset;
tmpccmr1 = TIMx->CCMR1; tmpccer = TIMx->CCER;
tmp = (u16)(TIM_ICPolarity << 4);
/* Select the Input and set the filter */
tmpccmr1 &= CCMR_CC24S_Mask & CCMR_IC24F_Mask; tmpccmr1 |= (u16)(TIM_ICFilter << 12); tmpccmr1 |= (u16)(TIM_ICSelection << 8);
/* Select the Polarity and set the CC2E Bit */ tmpccer &= CCER_CC2P_Reset;
tmpccer |= tmp | CCER_CC2E_Set;
/* Write to TIMx CCMR1 and CCER registers */ TIMx->CCMR1 = tmpccmr1 ; TIMx->CCER = tmpccer; } */
/* TI1_Config函数定义如下：
static void TI1_Config(TIM_TypeDef* TIMx, u16 TIM_ICPolarity, u16 TIM_ICSelection, u16 TIM_ICFilter) {
u16 tmpccmr1 = 0, tmpccer = 0;
/* Disable the Channel 1: Reset the CC1E Bit */ TIMx->CCER &= CCER_CC1E_Reset;
tmpccmr1 = TIMx->CCMR1; tmpccer = TIMx->CCER;
/* Select the Input and set the filter */
tmpccmr1 &= CCMR_CC13S_Mask & CCMR_IC13F_Mask;
tmpccmr1 |= TIM_ICSelection | (u16)(TIM_ICFilter << 4);
/* Select the Polarity and set the CC1E Bit */ tmpccer &= CCER_CC1P_Reset;
tmpccer |= TIM_ICPolarity | CCER_CC1E_Set;
/* Write to TIMx CCMR1 and CCER registers */ TIMx->CCMR1 = tmpccmr1; TIMx->CCER = tmpccer;
} */
19.2.15 函数TIM_ETRClockMode1Config
Table 492. 函数TIM_ETRClockMode1Config 函数名 TIM_ETRClockMode1Config void TIM_ETRClockMode1Config(TIM_TypeDef* TIMx, u16 TIM_ExtTRGPrescaler, 函数原形 u16 TIM_ExtTRGPolarity, u16 ExtTRGFilter) 功能描述 配置TIMx外部时钟模式1 输入参数1 TIMx：x可以是2，3 ，4，来选择TIM外设 输入参数2 TIM_ExtTRGPrescaler：外部触发预分频 输入参数3 TIM_ExtTRGPolarity：外部时钟极性 输入参数4 ExtTRGFilter：外部触发滤波器。取值在0x0-0xF之间。 输出参数 无 返回值 无 先决条件 无 被调用函数 无 TIM_ExtTRGPrescaler ：设置TIMx外部触发预分频。见Table 493. 参阅该参数的取值。 Table 493. TIM_ExtTRGPrescaler值 TIM_ExtTRGPrescaler 描述/SMCR. ETPS[1:0] #define值 备注 TIM_ExtTRGPSC_OFF TIM ETRP预分频 OFF 0x0000 TIM_ExtTRGPSC_DIV2 TIM ETRP频率/2 0x1000 bit13-12 TIM_ExtTRGPSC_DIV4 TIM ETRP频率/4 0x2000 TIM_ExtTRGPSC_DIV8 TIM ETRP频率/8 0x3000 TIM_ExtTRGPolarity：设置TIMx外部触发极性。见Table 494. 参阅该参数的取值。 Table 494. TIM_ExtTRGPolarity值 TIM_ExtTRGPolarity 描述/SMCR.ETP/bit15 #define值 TIM_ExtTRGPolarity_Inverted TIM外部触发极性翻转：低电平或下降沿有效 0x8000 TIM_ExtTRGPolarity_NonInverted TIM外部触发极性非翻转：高电平或上升沿有效 0x0000 例：
/* Selects the external clock Mode 1 for TIM2: the external clock is connected to ETR input pin, the rising edge is the active edge, no filter sampling is done (ExtTRGFilter = 0) and the prescaler is fixed to TIM_ExtTRGPSC_DIV2 */
TIM_ExternalCLK1Config(TIM2, TIM_ExtTRGPSC_DIV2, TIM_ExtTRGPolarity_NonInverted, 0x0); 函数原型如下：
void TIM_ETRClockMode1Config(TIM_TypeDef* TIMx, u16 TIM_ExtTRGPrescaler, u16 TIM_ExtTRGPolarity, u16 ExtTRGFilter) {
u16 tmpsmcr = 0;
/* Check the parameters */
assert_param(IS_TIM_123458_PERIPH(TIMx));
assert_param(IS_TIM_EXT_PRESCALER(TIM_ExtTRGPrescaler)); assert_param(IS_TIM_EXT_POLARITY(TIM_ExtTRGPolarity)); assert_param(IS_TIM_EXT_FILTER(ExtTRGFilter));
/* Configure the ETR Clock source */
TIM_ETRConfig(TIMx, TIM_ExtTRGPrescaler, TIM_ExtTRGPolarity, ExtTRGFilter);
/* Get the TIMx SMCR register value */ tmpsmcr = TIMx->SMCR;
/* Reset the SMS Bits */
tmpsmcr &= SMCR_SMS_Mask;//=0xFFF8-清除
/* Select the External clock mode1 */
tmpsmcr |= TIM_SlaveMode_External1;//0x0007—设置模式1
/* Select the Trigger selection : ETRF */ tmpsmcr &= SMCR_TS_Mask;//bit6-4
tmpsmcr |= TIM_TS_ETRF;// #define TIM_TS_ETRF ((u16)0x0070) //滤波分频
/* Write to TIMx SMCR */ TIMx->SMCR = tmpsmcr; }
19.2.16 函数TIM_ETRClockMode2Config
Table 495. 函数TIM_ETRClockMode2Config