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【东软载波ESF0654 PDS开发板活动】DHT11、RTC和OLED显示
今天根据SDK里Discovery板子上的DHT11和RTC驱动进行修改，集成到了昨天自己新建的模板程序中，同时增加了OLED模块的驱动程序，进行温湿度、实时时间和LED状态的显示测试。
【一】DHT11和RTC模块：
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。这里只列出部分代码，完整的工程代码可以稍后在附件中下载。
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();
}
/**
* @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：
我这里使用了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");
}
}
完整工程源代码：
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