Kenji Arai
In the past, you need modify rtc_api.c in mbed-dev source code. From this revision, you can just use RTC function all of conditions (Normal, Reset, Stand-by, Power OFF).
Note
From now on, you do NOT need any modification for mbed-dev library because STM team updates rtc_api.c source code and support RTC function under reset & standby condition includes power off condition (You need additional VBAT back-up hardware).
Please refer following NOTE information.
/users/kenjiArai/notebook/nucleo-series-rtc-control-under-power-onoff-and-re/
Revision 9:6a64b0207f72, committed 2017-01-16
- Comitter:
- kenjiArai
- Date:
- Mon Jan 16 09:38:03 2017 +0000
- Parent:
- 8:bf593344668e
- Child:
- 10:806cfec92eb6
- Commit message:
- mbed supports RTC function during RESET & Power ON/OFF. You don't need any modification for mbed library source code. You can just check RTC!!
Changed in this revision
--- a/SetRTC.lib Sat Jul 02 03:08:52 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://developer.mbed.org/users/kenjiArai/code/SetRTC/#78e453d7bb85
--- a/TextLCD.lib Sat Jul 02 03:08:52 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://developer.mbed.org/users/wim/code/TextLCD/#111ca62e8a59
--- a/main.cpp Sat Jul 02 03:08:52 2016 +0000
+++ b/main.cpp Mon Jan 16 09:38:03 2017 +0000
@@ -2,96 +2,88 @@
* mbed Application program
* RTC (inside STM32x CPU) test program
*
- * Copyright (c) 2015,'16 Kenji Arai / JH1PJL
+ * Copyright (c) 2015,'16,'17 Kenji Arai / JH1PJL
* http://www.page.sannet.ne.jp/kenjia/index.html
* http://mbed.org/users/kenjiArai/
* Created: January 17th, 2015
- * Revised: July 2nd, 2016
+ * Revised: January 16th, 2017
*
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
- * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
- * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/* mbed library now suports RTC continuous operation at Reset & Power ON/OFF
+ --------------------------------------------------------------------------
+ In the past, rtc_api.c (inside mbed) alway made a reset RTC registers
+ when user push a reset buttom or terninate a power.
+ Even if user configures a back-up circuit for RTC, mbed board could not
+ keep proper time.
+ I have checked mbed rev.133 and mbed-dev rev.155.
*/
-// Include ---------------------------------------------------------------------------------------
-#include "mbed.h"
-#include "TextLCD.h"
- // MUST -> need to modify rtc_api.c, please refer SetRTC.h file [CAUTION] and modify_info_xxx.h
-#include "SetRTC.h"
-
-// Definition ------------------------------------------------------------------------------------
-//#define USE_LCD
+/*
+ ----- Tested board -----
+ / Reset: / Stanby: / power off and restart:
+ Nucleo-F401RE / ok / ok / ok (need following Back-up Circuit)
+ Nucleo-F411RE / ok / ok / ok (need following Back-up Circuit)
+ Nucleo-F446RE / ok / ok / ok (need following Back-up Circuit)
+ Nucleo-F334R8 / ok / ok / ok (need following Back-up Circuit)
+ Nucleo-L476RG / ok / ok / ok (need following Back-up Circuit)
+ Nucleo-L152RE / ok / ok / no check (Need additional hardware)
+ Nucleo-L073RZ / ok / ok / no check (Need additional hardware)
+ Nucleo-L053R8 / ok / ok / no check (Need additional hardware)
-#if (defined(TARGET_STM32F401RE) || defined(TARGET_STM32F411RE) \
- || defined(TARGET_STM32L152RE) || defined(TARGET_STM32F334R8) \
- || defined(TARGET_STM32L476RG) \
- || defined(TARGET_STM32F746NG) || defined(TARGET_STM32F746ZG) )
-#else
-#error "Target is only Nucleo F401RE, F411RE, F334R8, F746xx, L476RG and L152RE"
-#endif
+ < Back-up circuit >
+ CN7 VIN <- SBD <- 330 Ohm <- CR2032 + - -> CN7 GND
+ Remove SB45 Zero Ohm resistor
+ */
+// Include --------------------------------------------------------------------
+#include "mbed.h"
+
+// Definition -----------------------------------------------------------------
#if (defined(TARGET_STM32F746NG) || defined(TARGET_STM32F746ZG))
#define PUSHED_SW 1 // Active high
#else
#define PUSHED_SW 0 // Active low
#endif
-// Object ----------------------------------------------------------------------------------------
+// Object ---------------------------------------------------------------------
DigitalIn userSW(USER_BUTTON);
DigitalOut myled(LED1); // Indicate the sampling period
Serial pc(USBTX, USBRX);
-#if defined(USE_LCD)
-I2C i2c(D14,D15); // SDA, SCL
-TextLCD_I2C_N lcd(&i2c, 0x7c, TextLCD::LCD8x2); // LCD(Akizuki AQM0802A)
-#endif
-DigitalOut pwr_onoff(PA_9);
-// RAM -------------------------------------------------------------------------------------------
+// RAM ------------------------------------------------------------------------
-// ROM / Constant data ---------------------------------------------------------------------------
+// ROM / Constant data --------------------------------------------------------
char *const msg0 = "Is a time correct? If no, please hit any key. ";
char *const msg1 = "<Push USER SW then enter sleep mode> ";
char *const msg2 = "\r\nEnter Standby Mode, please push RESET to wake-up\r\n";
-char *const msg3 = "Time was not updated! External Xtal does NOT oscillate.\r\n";
-char *const msg4 = "Time was not updated! LSI does NOT work.\r\n";
-
-// Function prototypes ---------------------------------------------------------------------------
-//-------------------------------------------------------------------------------------------------
+// Function prototypes --------------------------------------------------------
+static void time_enter_mode(void);
+static void chk_and_set_time(char *ptr);
+static void goto_standby(void);
+static int xatoi (char **str, unsigned long *res);
+static void get_line (char *buff, int len);
+
+//------------------------------------------------------------------------------
// Control Program
-//-------------------------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
int main()
{
char buf[64]; // data buffer for text
time_t seconds;
uint8_t wait_counter = 0;
- uint8_t xtal = 0;
- pwr_onoff = 1;
wait(2.0);
-#if defined(USE_LCD)
- // lcd
- lcd.locate(0, 0); // 1st line top
- // 12345678
- lcd.printf(" RTC ");
- lcd.locate(0, 1); // 2nd line top
- // 12345678
- lcd.puts(" JH1PJL ");
- lcd.setContrast(0x14);
-#endif
pc.printf("\r\n\r\nTest Nucleo RTC Function\r\n");
myled = !myled;
- if (SetRTC(0) == 1) {
- pc.printf("External");
- xtal = 1;
- } else {
- pc.printf("Internal");
- xtal = 0;
- }
- pc.printf(" Xtal for RTC\r\n");
- show_RTC_reg(); // only for debug purpose
// waiting for Initial screen
myled = 1;
wait(1.0);
@@ -100,19 +92,7 @@
while(1) {
seconds = time(NULL);
strftime(buf, 50, " %B %d,'%y, %H:%M:%S\r\n", localtime(&seconds));
- if (xtal){
- pc.printf("[Time] %s", buf);
- } else {
- pc.printf("[Time by Internal Clock] %s", buf);
- }
-#if defined(USE_LCD)
- lcd.locate(0, 0); // 1st line top
- strftime(buf, 40, "%b%d'%y", localtime(&seconds));
- lcd.printf(buf);
- lcd.locate(0, 1); // 2nd line top
- strftime(buf, 10, "%H:%M:%S", localtime(&seconds));
- lcd.printf(buf);
-#endif
+ pc.printf("[Time] %s", buf);
pc.printf(msg0);
pc.printf("%s\r", msg1);
wait_counter = 0;
@@ -122,14 +102,6 @@
time_enter_mode();
}
if (userSW == PUSHED_SW){
-#if defined(USE_LCD)
- lcd.locate(0, 0); // 1st line top
- // 12345678
- lcd.printf(" Enter ");
- lcd.locate(0, 1); // 2nd line top
- // 12345678
- lcd.printf(" Sleep " );
-#endif
pc.printf(msg2);
wait(1.0);
myled = 0;
@@ -137,11 +109,6 @@
}
wait(0.05);
if (++wait_counter > (2000 / 50)){
- if (xtal){
- pc.printf(msg3);
- } else {
- pc.printf(msg4);
- }
break;
}
}
@@ -153,3 +120,157 @@
myled = !myled;
}
}
+
+void time_enter_mode(void)
+{
+ char *ptr;
+ char linebuf[64];
+
+ pc.printf("\r\nSet time into RTC\r\n");
+ pc.printf(" e.g. >17 1 16 20 55 23 -> January 16th,'17, 20:55:23\r\n");
+ pc.printf(" If time is fine, just hit enter\r\n");
+ pc.putc('>');
+ ptr = linebuf;
+ get_line(ptr, sizeof(linebuf));
+ pc.printf("\r");
+ chk_and_set_time(ptr);
+}
+
+void goto_standby(void)
+{
+ deepsleep(); // Not Standby Mode but Deep Sleep Mode
+}
+
+// Change string -> integer
+int xatoi (char **str, unsigned long *res)
+{
+ unsigned long val;
+ unsigned char c, radix, s = 0;
+
+ while ((c = **str) == ' ') (*str)++;
+ if (c == '-') {
+ s = 1;
+ c = *(++(*str));
+ }
+ if (c == '0') {
+ c = *(++(*str));
+ if (c <= ' ') {
+ *res = 0;
+ return 1;
+ }
+ if (c == 'x') {
+ radix = 16;
+ c = *(++(*str));
+ } else {
+ if (c == 'b') {
+ radix = 2;
+ c = *(++(*str));
+ } else {
+ if ((c >= '0')&&(c <= '9')) {
+ radix = 8;
+ } else {
+ return 0;
+ }
+ }
+ }
+ } else {
+ if ((c < '1')||(c > '9')) {
+ return 0;
+ }
+ radix = 10;
+ }
+ val = 0;
+ while (c > ' ') {
+ if (c >= 'a') c -= 0x20;
+ c -= '0';
+ if (c >= 17) {
+ c -= 7;
+ if (c <= 9) return 0;
+ }
+ if (c >= radix) return 0;
+ val = val * radix + c;
+ c = *(++(*str));
+ }
+ if (s) val = -val;
+ *res = val;
+ return 1;
+}
+
+// Get key input data
+void get_line (char *buff, int len)
+{
+ char c;
+ int idx = 0;
+
+ for (;;) {
+ c = pc.getc();
+ if (c == '\r') {
+ buff[idx++] = c;
+ break;
+ }
+ if ((c == '\b') && idx) {
+ idx--;
+ pc.putc(c);
+ pc.putc(' ');
+ pc.putc(c);
+ }
+ if (((uint8_t)c >= ' ') && (idx < len - 1)) {
+ buff[idx++] = c;
+ pc.putc(c);
+ }
+ }
+ buff[idx] = 0;
+ pc.putc('\n');
+}
+
+void chk_and_set_time(char *ptr)
+{
+ unsigned long p1;
+ struct tm t;
+ time_t seconds;
+
+ if (xatoi(&ptr, &p1)) {
+ t.tm_year = (uint8_t)p1 + 100;
+ pc.printf("Year:%d ",p1);
+ xatoi( &ptr, &p1 );
+ t.tm_mon = (uint8_t)p1 - 1;
+ pc.printf("Month:%d ",p1);
+ xatoi( &ptr, &p1 );
+ t.tm_mday = (uint8_t)p1;
+ pc.printf("Day:%d ",p1);
+ xatoi( &ptr, &p1 );
+ t.tm_hour = (uint8_t)p1;
+ pc.printf("Hour:%d ",p1);
+ xatoi( &ptr, &p1 );
+ t.tm_min = (uint8_t)p1;
+ pc.printf("Min:%d ",p1);
+ xatoi( &ptr, &p1 );
+ t.tm_sec = (uint8_t)p1;
+ pc.printf("Sec: %d \r\n",p1);
+ } else {
+ return;
+ }
+ seconds = mktime(&t);
+ set_time(seconds);
+ // Show Time with several example
+ // ex.1
+ pc.printf(
+ "Date: %04d/%02d/%02d, %02d:%02d:%02d\r\n",
+ t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec
+ );
+#if 0
+ time_t seconds;
+ char buf[40];
+
+ seconds = mktime(&t);
+ // ex.2
+ strftime(buf, 40, "%x %X", localtime(&seconds));
+ pc.printf("Date: %s\r\n", buf);
+ // ex.3
+ strftime(buf, 40, "%I:%M:%S %p (%Y/%m/%d)", localtime(&seconds));
+ pc.printf("Date: %s\r\n", buf);
+ // ex.4
+ strftime(buf, 40, "%B %d,'%y, %H:%M:%S", localtime(&seconds));
+ pc.printf("Date: %s\r\n", buf);
+#endif
+}
--- a/mbed-dev.lib Sat Jul 02 03:08:52 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/mbed_official/code/mbed-dev/#d6373279a6f1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Jan 16 09:38:03 2017 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/99b5ccf27215 \ No newline at end of file
--- a/readme_1st.txt Sat Jul 02 03:08:52 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,4 +0,0 @@ -Please modify source code in mbed-dev library before using the program. -Refer /SetRTC/modify_info_F4xx.h, modify_info_F334.h, modify_info_L476.h, - modify_info_F746.h and modify_info_L152.h - by JH1PJL \ No newline at end of file