使用国产单片机是什么体验？（文末申请开发板测评）

21ic电子网 2020-12-23 00:00

TI MCU方案：电动汽车实时控制 【免注册下载】创新MCU提升高压系统的实时性能

伴随着浓浓的中国芯热情下，国产芯片越来越好了，国产单片机也逐渐成为工程师的优选。

那么用国产单片机开发究竟是怎样的体验？

1、利用东软载波开发板进行ADC及PWM调光测试

这位工程师是来自21ic论坛的用户hbzjt2011，他选用了ES32F0654LT进行这次开发。

ES32F0654LT集成的支持 1 路模数转换器（ADC0）。ADC（Analog to Digital Convertor）是 12 位分辨率的逐次逼近型模数转换器。它具有多达 19 个复用通道，可测量从管脚输入的 16 个外部信号、3 个内部信号。这些通道的模数转换可在单次、连续、扫描或不连续采样模式下进行。ADC 的结果存储在一个左对齐或右对齐的 16 位数据寄存器中。

ESF0654 PDS开发板ADC接在PB0接口，PB0为ADC0的14通道。

IO引脚配置如下：

static void adc_pin_init(void){ /* Initialize ADC pin */ gpio_init_t x;
 /* Initialize PB0 pin */ x.mode = GPIO_MODE_INPUT; x.odos = GPIO_PUSH_PULL; x.pupd = GPIO_PUSH_UP; x.odrv = GPIO_OUT_DRIVE_NORMAL; x.flt = GPIO_FILTER_DISABLE; x.type = GPIO_TYPE_TTL; x.func = GPIO_FUNC_0; ald_gpio_init(GPIOB, GPIO_PIN_0, &x);
 return;}

ADC0的配置如下：

void adc_init(void){ /* clear lpuart_handle_t structure */ memset(&h_adc, 0x0, sizeof(adc_handle_t)); /* clear adc_nch_conf_t structure */ memset(®_config, 0x0, sizeof(adc_nch_conf_t));
 adc_pin_init();
 /* Initialize adc */ h_adc.perh = ADC0; h_adc.init.data_align = ADC_DATAALIGN_RIGHT; h_adc.init.scan_mode = DISABLE; h_adc.init.cont_mode = DISABLE; h_adc.init.nch_len = ADC_NCH_LEN_1; h_adc.init.disc_mode = ADC_ALL_DISABLE; h_adc.init.disc_nbr = ADC_DISC_NBR_1; h_adc.init.conv_res = ADC_CONV_RES_10; h_adc.init.clk_div = ADC_CKDIV_128; h_adc.init.neg_ref = ADC_NEG_REF_VSS; h_adc.init.pos_ref = ADC_POS_REF_VDD;
 ald_adc_init(&h_adc);
 /* Initialize regular convert channel */ reg_config.channel = ADC_CHANNEL_14; reg_config.rank = ADC_NCH_RANK_1; reg_config.samp_time = ADC_SAMPLETIME_4; ald_adc_normal_channel_config(&h_adc, ®_config);
 return;}

ES32F0654LT集成通用定时器（GP16C2T）包含一个 16 位自动重载计数器，该计数器由可配置的预分频器驱动。支持 2 路通用定时器（GP16C2T0，GP16C2T1）。GP16C2T 包含 2 个独立通道。通用定时器（GP16C2T）的用途广泛，可测量信号脉冲长度（输入捕获）或输出脉冲波形（比较输出、PWM 及带死区时间插入的互补 PWM）。

本程序中使用了TIM3的1通道，对应引脚为PC6。

IO引脚初始化如下，对应IO的功能3：

static void tim3_pin_init(void){ gpio_init_t GPIO_InitStructure;
 /* Initialize tim0 ch1 pin */ GPIO_InitStructure.mode = GPIO_MODE_OUTPUT; GPIO_InitStructure.odos = GPIO_PUSH_PULL; GPIO_InitStructure.pupd = GPIO_PUSH_UP; GPIO_InitStructure.odrv = GPIO_OUT_DRIVE_NORMAL; GPIO_InitStructure.flt = GPIO_FILTER_DISABLE; GPIO_InitStructure.type = GPIO_TYPE_TTL; GPIO_InitStructure.func = GPIO_FUNC_3;
 ald_gpio_init(GPIOC, GPIO_PIN_6, &GPIO_InitStructure)；
}

TIM3初始化程序如下：

void tim3_init(timer_handle_t *tim_h, timer_oc_init_t *tim_ocinit, timer_clock_config_t *tim_clock){ /* Initialize pin */ tim3_pin_init();
 /* Initialize TIM3 */ tim_h->perh = GP16C2T1; tim_h->init.prescaler = 0; tim_h->init.mode = TIMER_CNT_MODE_UP; tim_h->init.period = (uint32_t)(255 - 1); tim_h->init.clk_div = TIMER_CLOCK_DIV1; tim_h->init.re_cnt = 0; ald_timer_pwm_init(tim_h);
 /* Initialize clock source */ tim_clock->source = TIMER_SRC_INTER; ald_timer_config_clock_source(tim_h, tim_clock);
 /* Common configuration for all channels */ tim_ocinit->oc_mode = TIMER_OC_MODE_PWM1; tim_ocinit->oc_polarity = TIMER_OC_POLARITY_HIGH; tim_ocinit->oc_fast_en = DISABLE; tim_ocinit->ocn_polarity = TIMER_OCN_POLARITY_HIGH; tim_ocinit->ocn_idle = TIMER_OCN_IDLE_RESET; tim_ocinit->oc_idle = TIMER_OC_IDLE_RESET;
 /* Set the pulse value for channel 1 */ tim_ocinit->pulse = (uint32_t)(255 * 20 / 100); ald_timer_oc_config_channel(tim_h, tim_ocinit, TIMER_CHANNEL_1);
 /* Set the pulse value for channel 2 */ tim_ocinit->pulse = (uint32_t)(255 * 50 / 100); ald_timer_oc_config_channel(tim_h, tim_ocinit, TIMER_CHANNEL_2);
 /* Start input pwm from tim2/3 channel 1 */ ald_timer_oc_start(tim_h, TIMER_CHANNEL_1);
}

主程序实现了根据ADC采用进行PWM调节控制外部导光板的亮度：

 /* ADC测试 */ value = adc_average(); sprintf((char *)tx_buf, "ADC_Value: %d \n", value); ald_uart_send(&h_uart, tx_buf, sizeof("ADC_Value: %d \n"), 1000); 
 /* TIM3 PWM测试 */ duty = value/32.72; if(duty <= 1) duty = 1; ald_timer_pwm_set_duty(&tim3.tim_h, TIMER_CHANNEL_1, (uint16_t)duty);

2、利用东软载波开发板进行DHT11、RTC和OLED显示

依然是来自21ic论坛的用户hbzjt2011，这个应用他选用了东软载波的ESF0654 PDS。

【一】DHT11和RTC模块部分代码：
该模块的驱动只要对原有SDK程序进行简单移植即可，主要是对IO管脚的配置。

dht11.c

/** * @defgroup DHT11_Public_Functions dht11 Public Functions * [url=home.php?mod=space&uid=247401]@brief[/url] BSP DHT11 Functions * @verbatim =============================================================================== ##### BSP DHT11 Functions ##### =============================================================================== [..] This section provides functions allowing to: (+) Initialize bsp dht11. (+) get dht11 data.

 @endverbatim * @{ */

/** * [url=home.php?mod=space&uid=247401]@brief[/url] get dht11 data * @retval result 1 or 0 */uint8_t dht11_read_data(uint8_t *temp, uint8_t *humi){ uint8_t buf[5] = {0}; uint8_t i;

 dht11_reset();

 if (dht11_check() == 0) { for (i = 0; i < 5; i++) buf[i] = dht11_read_byte();

 if ((buf[0] + buf[1] + buf[2] + buf[3]) == buf[4]) { *humi = buf[0]; *temp = buf[2]; } } else return 1;

 return 0;}

/** * @brief init dht11 * @retval result 1 or 0 */uint8_t dht11_init(void){ dht11_pin_init(); ald_delay_ms(100); dht11_reset();

 return dht11_check();}

rtc.c

/** * @brief rtc module initialize function * @retval None */void rtc_init(void *rtc_param){ rtc_param_t *p_rtc = (rtc_param_t *)rtc_param;
 /* Initialize RTC */ p_rtc->init.asynch_pre_div = 0; p_rtc->init.synch_pre_div = 32767; p_rtc->init.hour_format = RTC_HOUR_FORMAT_24; p_rtc->init.output = RTC_OUTPUT_DISABLE; p_rtc->init.output_polarity = RTC_OUTPUT_POLARITY_HIGH; ald_rtc_init(&p_rtc->init);
 /* Set current time and date */ p_rtc->time.hour = 18; p_rtc->time.minute = 31; p_rtc->time.second = 43; p_rtc->time.sub_sec = 123; p_rtc->date.day = 15; p_rtc->date.month = 12; p_rtc->date.year = 19; p_rtc->date.week = 7; ald_rtc_set_time(&p_rtc->time, RTC_FORMAT_DEC); ald_rtc_set_date(&p_rtc->date, RTC_FORMAT_DEC);
 /* Enable second interrupt */ ald_rtc_interrupt_config(RTC_IT_SEC, ENABLE);}

【二】OLED显示屏模块：
这里使用了OLED12864显示液晶，采用模拟IIC进行驱动，便于程序的移植。

int main(){ /* Initialize ALD */ ald_cmu_init(); /* Configure system clock */ ald_cmu_pll1_config(CMU_PLL1_INPUT_HOSC_3, CMU_PLL1_OUTPUT_48M); ald_cmu_clock_config(CMU_CLOCK_PLL1, 48000000);
 /* Initialize tx_buf */ memset(tx_buf, 0x55, sizeof(tx_buf));
 /* Initialize uart_usb */ uart_usb_init();
 /* Initialize led */ led_pin_init();
 /* Initialize led */ dht11_init();
 /* Initialize oled */ OLED_Init();
 /* Initialize rtc */ rtc_init(&rtc_h);
 while (1) { /* Send a message */ //sprintf((char *)tx_buf, "es32 uart test!\n"); //ald_uart_send(&h_uart, tx_buf, sizeof("es32 uart test!\n"), 1000);
 /* LED灯测试 */ cnt++; if(cnt == 5) { ald_gpio_write_pin(LED1_PORT, LED1_PIN, 0); ald_gpio_write_pin(LED2_PORT, LED2_PIN, 0); sprintf((char *)tx_buf, "LED ON "); OLED_P8x16Str(0u,4u,(uint8_t *)tx_buf); //ald_delay_ms(1000);  }else if(cnt == 10) { ald_gpio_write_pin(LED1_PORT, LED1_PIN, 1); ald_gpio_write_pin(LED2_PORT, LED2_PIN, 1); sprintf((char *)tx_buf, "LED OFF"); OLED_P8x16Str(0u,4u,(uint8_t *)tx_buf); //ald_delay_ms(1000); cnt = 0;  }
 /* DHT11温湿度传感器测试 */ dht11_read_data(&temp, &humi); sprintf((char *)tx_buf, "Temp: %d Humi: %d \n", temp, humi); ald_uart_send(&h_uart, tx_buf, sizeof("Temp: %d Humi: %d \n"), 1000);
 /* RTC测试 */ ald_rtc_get_time(&rtc_v, RTC_FORMAT_DEC); sprintf((char *)tx_buf, "Time:%02d-%02d-%02d", rtc_v.hour, rtc_v.minute, rtc_v.second); OLED_P8x16Str(0u,6u,(uint8_t *)tx_buf);
 /* OLED显示屏测试 */ OLED_P8x16Str(0u,0u,(uint8_t *)"ES32 PDS BOARD"); sprintf((char *)tx_buf, "Temp:%d Humi:%d", temp, humi); OLED_P8x16Str(0u,2u,(uint8_t *)tx_buf); //OLED_P8x16Str(0u,6u,(uint8_t *)"Date:2019-12-15"); }}