TIM外设是一个多通道定时器单元，根据使用的需要，可以在各种配置中使用。有三种分类：高级控制计时器、通用计时器和基本计时器。
特性：
TIM1和TIM8是高级控制定时器，具有6个独立通道。
TIM2，TIM3，TIM4和TIM5是具有4个独立通道的通用定时器。
TIM12，TIM13和TIM14是通用定时器，具有2个（TIM12）或1个（TIM13和TIM14）独立通道。
TIM15，TIM16和TIM17也是通用定时器，具有2个（TIM15）或1个（TIM16和TIM17）独立通道。 与TIM12，TIM13和TIM14相比，此配置带来了一些对电机控制非常有用的功能（例如中断功能，DMA突发模式控制，具有死区时间插入的互补输出等）
TIM6和TIM7是基本计时器
TIM12和/或TIM15可分配给：
可以在secure monitor（TF-A或OP-TEE）中控制Arm Cortex-A7安全核心，以在RCC中执行HSI和CSI校准。
可以将所有TIM控制器分配给：
可以通过PWM或IIO框架在Linux中
或者
TIM HAL驱动程序可在STM32Cube MPU封装中控制Arm®Cortex®-M4
外设分配
| Domain | Peripheral | Runtime allocation | Comment | |||
| Instance | Cortex-A7 secure (OP-TEE) | Cortex-A7 non-secure (Linux) | Cortex-M4 (STM32Cube) | |||
| Core/Timers | TIM | TIM1 (APB2 group) | ☐ | ☐ | Assignment (single choice) | |
| TIM2 (APB1 group) | ☐ | ☐ | Assignment (single choice) | |||
| TIM3 (APB1 group) | ☐ | ☐ | Assignment (single choice) | |||
| TIM4 (APB1 group) | ☐ | ☐ | Assignment (single choice) | |||
| TIM5 (APB1 group) | ☐ | ☐ | Assignment (single choice) | |||
| TIM6 (APB1 group) | ☐ | ☐ | Assignment (single choice) | |||
| TIM7 (APB1 group) | ☐ | ☐ | Assignment (single choice) | |||
| TIM8 (APB2 group) | ☐ | ☐ | Assignment (single choice) | |||
| TIM12 (APB1 group) | ☐ | ☐ | ☐ | Assignment (single choice) | ||
| TIM13 (APB1 group) | ☐ | ☐ | Assignment (single choice) | |||
| TIM14 (APB1 group) | ☐ | ☐ | Assignment (single choice) | |||
| TIM15 (APB2 group) | ☐ | ☐ | ☐ | Assignment (single choice) | ||
| TIM16 (APB2 group) | ☐ | ☐ | Assignment (single choice) | |||
| TIM17 (APB2 group) | ☐ | ☐ | Assignment (single choice) |
| Function | Pin Name | Alternative Function |
| TIM3_CH2 | PB5 | AF2 |
| TIM1_CH1N | PB13 | AF2 |
| TIM8_CH1N | PH13 | AF3 |
| TIM8_BKIN2 | PI1 | AF3 |
| TIM8_ETR | PI3 | AF3 |
| TIM5_CH4 | PI0 | AF2 |
| TIM8_CH4 | PI2 | AF3 |
| TIM17_BKIN | PB5 | AF1 |
| LPTIM2_OUT | PB13 | AF4 |
CA7配置Capture功能
/* select TIM1_CH1 alternate function 1 on 'PE9' */
pwm1_in_pins_a: pwm1-in-0 {
pins {
pinmux = <STM32_PINMUX('E', 9, AF1)>;
bias-disable;
};
};
/* configure 'PE9' as analog input in low-power mode */
pwm1_in_sleep_pins_a: pwm1-in-sleep-0 {
pins {
pinmux = <STM32_PINMUX('E', 9, ANALOG)>;
};
};
&timers1 {
status = "okay";
/* Enable DMA "ch1" for PWM input on TIM1_CH1 */
dmas = <&dmamux1 11 0x400 0x5>;
dma-names = "ch1";
pwm {
/* configure PWM input pins, e.g. TIM1_CH1 */
pinctrl-0 = <&pwm1_in_pins_a>;
pinctrl-1 = <&pwm1_in_sleep_pins_a>;
pinctrl-names = "default", "sleep";
/* enable PWM on TIM1 */
status = "okay";
};
};CM4使用TIM功能
&timers1 {
status = "disabled";
};
&m4_timers1 {
pinctrl-names = "rproc_default";
pinctrl-0 = <&timer1_pins>;
status = "okay";
};PWM输出功能
&pinctrl {
pwm5_pins_b: pwm5-0 {
pins {
pinmux = <STM32_PINMUX('I', 0, AF2)>; /* TIM5_CH4 */
bias-pull-down;
drive-push-pull;
slew-rate = <0>;
};
};
pwm5_sleep_pins_b: pwm5-sleep-0 {
pins {
pinmux = <STM32_PINMUX('I', 0, ANALOG)>; /* TIM5_CH4 */
};
};
};
&timers5 {
status = "okay";
/* spare all DMA channels since they are not needed for PWM output */
/delete-property/dmas;
/delete-property/dma-names;
/* define pwm1 label */
pwm {
/* configure PWM pins on TIM1_CH1 */
pinctrl-0 = <&pwm5_pins_b>;
pinctrl-1 = <&pwm5_sleep_pins_b>;
pinctrl-names = "default", "sleep";
/* enable PWM on TIM1 */
status = "okay";
};
};