五.microchip 代理贝能的sam d51(LQFP100PIN)与LAN9253 电机控制开发板使用总结（3）

3.4 板子相关外设配置

3.4.1 板子MCU硬件 的LAN9253连接接口

pin num	pin id	cus_name	func	mode	dir	latch	push up	push down	dir str
1	PA00	GPIO_PA0_D0	GPIO		IN		Y		NORMAL
2	PA01	GPIO_PA1	GPIO		IN		Y		NORMAL
7	PA02	GPIO_PA2	GPIO		IN		Y		NORMAL
8	PA03	GPIO_PA3	GPIO		IN		Y		NORMAL
17	PA04	GPIO_PA4	GPIO		IN		Y		NORMAL
18	PA05	GPIO_PA5	GPIO		IN		Y		NORMAL
19	PA06	GPIO_PA6	GPIO		IN		Y		NORMAL
20	PA07	GPIO_PA7_D7	GPIO		IN		Y		NORMAL
26	PA08	GPIO_PA8_SPI_DATA	GPIO		IN/out		Y		NORMAL
32	PA10	GPIO_PB10_SPI_CLK	GPIO		IN/out		Y		NORMAL
33	PB11	GPIO_PB11_SPI_CS	GPIO		IN/out		Y		NORMAL
46	PA12	GPIO_PA12_D12	GPIO		IN		Y		NORMAL
47	PA13	GPIO_PA13	GPIO		IN		Y		NORMAL
48	PA14	GPIO_PA14	GPIO		IN		Y		NORMAL
49	PA15	GPIO_PA15_D15	GPIO		IN		Y		NORMA
52	PA16	GPIO_PA16_D8	GPIO		IN		Y		NORMAL
53	PA17	GPIO_PA17	GPIO		IN		Y		NORMAL
54	PA18	GPIO_PA18	GPIO		IN		Y		NORMAL
55	PA19	GPIO_PA19_D11	GPIO		IN		Y		NORMA
64	PB16	GPIO_PB16_RD	GPIO		OUT		Y		NORMA
65	PB17	GPIO_PB17_WR	GPIO		OUT		Y		NORMA
66	PB18	GPIO_PB18_CS	GPIO		OUT		Y		NORMA
78	PB22	GPIO_PB22_A1	GPIO		OUT		Y		NORMA
79	PB23	GPIO_PB23_A2	GPIO		OUT		Y		NORMA
80	PB24	GPIO_PB24_A3	GPIO		OUT		Y		NORMA
21	PB25	GPIO_PB25_A4	GPIO		OUT		Y		NORMA

3.4.2 MCU TCC–PWM 电机控制

PIN40–PC10–PWM0H

PIN41–PC11–PWM0L

PIN42–PC12–PWM1H

PIN43–PC13–PWM1L

PIN44–PC14–PWM2H

PIN45–PC15–PWM2L

Timer/Counter for Control applications (TCC) peripheral

3.4.2.1 应用调用例子

        /* Register callback function for period event */TCC0_PWMCallbackRegister(TCC_PeriodEventHandler, (uintptr_t)NULL);/* Read the period */period = TCC0_PWM24bitPeriodGet();/* Start PWM*/TCC0_PWMStart();

/**************************************** Check PWM outputs on pins* Channel 0 PWMH - PC04* Channel 0 PWML - PD11* Channel 1 PWMH - PD08* Channel 1 PWML - PB17* Channel 2 PWMH - PB14* Channel 2 PWML - PC22
***************************************//* Duty cycle increment value */
#define DUTY_INCREMENT (10U)/* Save PWM period */
uint32_t period;/* This function is called after TCC period event */
void TCC_PeriodEventHandler(uint32_t status, uintptr_t context)
{/* duty cycle values */static uint32_t duty0 = 0U;static uint32_t duty1 = 800U;static uint32_t duty2 = 1600U;TCC0_PWM24bitDutySet(TCC0_CHANNEL0, duty0);TCC0_PWM24bitDutySet(TCC0_CHANNEL1, duty1);TCC0_PWM24bitDutySet(TCC0_CHANNEL2, duty2);/* Increment duty cycle values */duty0 += DUTY_INCREMENT;duty1 += DUTY_INCREMENT;duty2 += DUTY_INCREMENT;if (duty0 > period)duty0 = 0U;if (duty1 > period)duty1 = 0U;if (duty2 > period)duty2 = 0U;}

3.4.3 MCU ADC–IA/IB/IC

15 PB08 IA

16 PB09 IB

97 PB00 IC

3.4.4 MCU GPIO–网卡指示灯

74 PA24 RJLED2

75 PA25 RJLED1

3.4.4.1 应用调用例子

/*** Macros for LED pin ***/
#define RJLED2_Set()               (PORT_REGS->GROUP[0].PORT_OUTSET = ((uint32_t)1U << 24U))
#define RJLED2_Clear()             (PORT_REGS->GROUP[0].PORT_OUTCLR = ((uint32_t)1U << 24U))
#define RJLED2_Toggle()            (PORT_REGS->GROUP[0].PORT_OUTTGL = ((uint32_t)1U << 24U))
#define RJLED2_OutputEnable()      (PORT_REGS->GROUP[0].PORT_DIRSET = ((uint32_t)1U << 24U))
#define RJLED2_InputEnable()       (PORT_REGS->GROUP[0].PORT_DIRCLR = ((uint32_t)1U << 24U))
#define RJLED2_Get()               (((PORT_REGS->GROUP[0].PORT_IN >> 24U)) & 0x01U)
#define RJLED2_PIN                  PORT_PIN_PA24#define RJLED1Set()               (PORT_REGS->GROUP[0].PORT_OUTSET = ((uint32_t)1U << 25U))
#define RJLED1_Clear()             (PORT_REGS->GROUP[0].PORT_OUTCLR = ((uint32_t)1U << 25U))
#define RJLED1_Toggle()            (PORT_REGS->GROUP[0].PORT_OUTTGL = ((uint32_t)1U << 25U))
#define RJLED1_OutputEnable()      (PORT_REGS->GROUP[0].PORT_DIRSET = ((uint32_t)1U << 25U))
#define RJLED1_InputEnable()       (PORT_REGS->GROUP[0].PORT_DIRCLR = ((uint32_t)1U << 25U))
#define RJLED1_Get()               (((PORT_REGS->GROUP[0].PORT_IN >> 25U)) & 0x01U)
#define RJLED1_PIN                  PORT_PIN_PA25

3.4.5 MCU EIC–KEY S1

按键中断

69 PB21 KEY1

默认1，按下按键0

3.4.5.1 应用调用例子

   EIC_CallbackRegister(EIC_PIN_5,EIC_User_Handler, 0);

static void EIC_User_Handler(uintptr_t context)
{
//    LED_Toggle();SERCOM0_USART_Write("EIC is ok!", sizeof"EIC is ok!");
}

3.4.5.2 板子没有复位按键，使用另外按键进行复位

static void EIC_User_Handler(uintptr_t context)
{
//    LED_Toggle();SERCOM0_USART_Write("EIC is ok!", sizeof"EIC is ok!");NVIC_SystemReset();
}

3.4.6 MCU key EIC -->evsys–>led tog

按键按下EIC中断，在中断处理函数中进行控制LED TOG.

那么是否有更好或者其他的方式呢？

按键按下，EIC输出到ev sys，ev sys直接进行控制LED TOG，不需要CPU参与。

当然也可以实现按键按下，产生EIC中断输出，在中断处理函数中进行控制LED TOG.

也同时可以EIC事件输出，ev sys直接进行控制LED TOG，不需要CPU参与。

https://www.microchip.com/forums/m1173949.aspx