From 02a609e33fbf811f043cd0c628b7d1266a4d41c2 Mon Sep 17 00:00:00 2001 From: chenyingchun0312 Date: Mon, 14 Sep 2020 01:09:07 +0800 Subject: [PATCH] add rtc device driver for nrf52x Signed-off-by: chenyingchun0312 --- bsp/nrf5x/libraries/drivers/SConscript | 3 + bsp/nrf5x/libraries/drivers/drv_rtc.c | 158 +++++++++++++++++++++++++ bsp/nrf5x/nrf52832/board/Kconfig | 21 ++++ 3 files changed, 182 insertions(+) create mode 100644 bsp/nrf5x/libraries/drivers/drv_rtc.c diff --git a/bsp/nrf5x/libraries/drivers/SConscript b/bsp/nrf5x/libraries/drivers/SConscript index 2b29998d7..f8629162f 100644 --- a/bsp/nrf5x/libraries/drivers/SConscript +++ b/bsp/nrf5x/libraries/drivers/SConscript @@ -32,6 +32,9 @@ if GetDepend(['BSP_USING_PWM']): if GetDepend(['BSP_USING_WDT']): src += ['drv_wdt.c'] +if GetDepend(['BSP_USING_ONCHIP_RTC']): + src += ['drv_rtc.c'] + path = [cwd] group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path) diff --git a/bsp/nrf5x/libraries/drivers/drv_rtc.c b/bsp/nrf5x/libraries/drivers/drv_rtc.c new file mode 100644 index 000000000..96cda89de --- /dev/null +++ b/bsp/nrf5x/libraries/drivers/drv_rtc.c @@ -0,0 +1,158 @@ +/* + * Copyright (c) 2006-2018, RT-Thread Development Team + * + * SPDX-License-Identifier: Apache-2.0 + * + * Change Logs: + * Date Author Notes + * 2020-09-08 Chenyingchun first version + */ + +#include "board.h" +#include +#include + +#include +#include + +#ifdef BSP_USING_ONCHIP_RTC + +#define LOG_TAG "drv.rtc" +#define DBG_LVL DBG_LOG +#include + +/* 2018-01-30 14:44:50 = RTC_TIME_INIT(2018, 1, 30, 14, 44, 50) */ +#define RTC_TIME_INIT(year, month, day, hour, minute, second) \ + {.tm_year = year - 1900, .tm_mon = month - 1, .tm_mday = day, .tm_hour = hour, .tm_min = minute, .tm_sec = second} + +#ifndef ONCHIP_RTC_TIME_DEFAULT +#define ONCHIP_RTC_TIME_DEFAULT RTC_TIME_INIT(2018, 1, 1, 0, 0 ,0) +#endif + +#define TICK_FREQUENCE_HZ (RT_TICK_PER_SECOND) // RTC tick frequence, in HZ + +static struct rt_device rtc; +static time_t init_time; +static uint32_t tick = 0; + +static void rtc_callback(nrfx_rtc_int_type_t int_type) +{ + static uint32_t count = 0; + + if (int_type == NRFX_RTC_INT_TICK) + { + count++; + if((count % TICK_FREQUENCE_HZ) == 0) + { + tick++; + } + } +} + +static rt_err_t rt_rtc_config(struct rt_device *dev) +{ + #define SYSTICK_CLOCK_HZ (32768UL) + #define RTC_PRESCALER ((uint32_t) (NRFX_ROUNDED_DIV(SYSTICK_CLOCK_HZ, TICK_FREQUENCE_HZ) - 1)) + + const nrfx_rtc_t rtc_instance = NRFX_RTC_INSTANCE(2); + nrf_clock_lf_src_set(NRF_CLOCK, (nrf_clock_lfclk_t)NRFX_CLOCK_CONFIG_LF_SRC); + nrfx_clock_lfclk_start(); + + //Initialize RTC instance + nrfx_rtc_config_t config = NRFX_RTC_DEFAULT_CONFIG; + config.prescaler = RTC_PRESCALER; + + nrfx_rtc_init(&rtc_instance, &config, rtc_callback); + + nrfx_rtc_tick_enable(&rtc_instance, true); + + //Power on RTC instance + nrfx_rtc_enable(&rtc_instance); + + return RT_EOK; +} + +static rt_err_t rt_rtc_control(rt_device_t dev, int cmd, void *args) +{ + time_t *time; + RT_ASSERT(dev != RT_NULL); + + switch (cmd) + { + case RT_DEVICE_CTRL_RTC_GET_TIME: + { + time = (time_t *) args; + *time = init_time + tick; + break; + } + case RT_DEVICE_CTRL_RTC_SET_TIME: + { + time = (time_t *) args; + init_time = *time - tick; + break; + } + } + return RT_EOK; +} + + +#ifdef RT_USING_DEVICE_OPS +const static struct rt_device_ops rtc_ops = +{ + RT_NULL, + RT_NULL, + RT_NULL, + RT_NULL, + RT_NULL, + rt_rtc_control +}; +#endif + +static rt_err_t rt_hw_rtc_register(rt_device_t device, const char *name, rt_uint32_t flag) +{ + struct tm time_new = ONCHIP_RTC_TIME_DEFAULT; + + RT_ASSERT(device != RT_NULL); + + init_time = mktime(&time_new); + if (rt_rtc_config(device) != RT_EOK) + { + return -RT_ERROR; + } +#ifdef RT_USING_DEVICE_OPS + device->ops = &rtc_ops; +#else + device->init = RT_NULL; + device->open = RT_NULL; + device->close = RT_NULL; + device->read = RT_NULL; + device->write = RT_NULL; + device->control = rt_rtc_control; +#endif + device->type = RT_Device_Class_RTC; + device->rx_indicate = RT_NULL; + device->tx_complete = RT_NULL; + device->user_data = RT_NULL; + + /* register a character device */ + rt_device_register(device, name, flag); + + return RT_EOK; +} + +int rt_hw_rtc_init(void) +{ + rt_err_t result; + result = rt_hw_rtc_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR); + if (result != RT_EOK) + { + LOG_E("rtc register err code: %d", result); + return result; + } + LOG_D("rtc init success"); + return RT_EOK; +} +INIT_DEVICE_EXPORT(rt_hw_rtc_init); + +#endif /* BSP_USING_ONCHIP_RTC */ + diff --git a/bsp/nrf5x/nrf52832/board/Kconfig b/bsp/nrf5x/nrf52832/board/Kconfig index 80756b537..149464a83 100644 --- a/bsp/nrf5x/nrf52832/board/Kconfig +++ b/bsp/nrf5x/nrf52832/board/Kconfig @@ -313,6 +313,27 @@ endif int default 1 endif + + menuconfig BSP_USING_ONCHIP_RTC + bool "Enable RTC" + select RT_USING_RTC + select RT_USING_LIBC + select NRFX_CLOCK_ENABLED + default n + if BSP_USING_ONCHIP_RTC + config NRFX_CLOCK_ENABLED + int + default 1 + config NRFX_RTC_ENABLED + int + default 1 + config NRFX_RTC2_ENABLED + int + default 1 + config NRFX_CLOCK_DEFAULT_CONFIG_IRQ_PRIORITY + int + default 7 + endif endmenu endmenu -- GitLab