LPC1768 and LPC11U24 watchdog timer

Dependents:   GSwifi_tsutenkaku barometer-m0

Files at this revision

API Documentation at this revision

Comitter:
okini3939
Date:
Wed May 25 08:52:32 2016 +0000
Parent:
2:f6f05e2eafd0
Commit message:
supported LPC8XX

Changed in this revision

WDT.cpp Show annotated file Show diff for this revision Revisions of this file
WDT.h Show annotated file Show diff for this revision Revisions of this file
--- a/WDT.cpp	Fri Jul 11 00:53:14 2014 +0000
+++ b/WDT.cpp	Wed May 25 08:52:32 2016 +0000
@@ -12,10 +12,17 @@
     LPC_WDT->WDTC = s * (float)clk;
     LPC_WDT->WDMOD = 0x03;                   // Enabled and Reset
 #elif defined(TARGET_LPC11U24) || defined(TARGET_LPC11UXX)
-    LPC_WWDT->CLKSEL = 0x01;               // Set CLK src to PCLK
-    uint32_t clk = SystemCoreClock / 16;    // WD has a fixed /4 prescaler, PCLK default is /4
+    LPC_WWDT->CLKSEL = 0x01;               // Set CLK src to WDOSC
+    uint32_t clk = 500000 / 64 / 4;    // WD has a fixed /4 prescaler, WDOSC default is /4
     LPC_WWDT->TC = s * (float)clk;
     LPC_WWDT->MOD = 0x03;                   // Enabled and Reset
+#elif defined(TARGET_LPC81X) || defined(TARGET_LPC82X)
+    LPC_SYSCON->WDTOSCCTRL = (0xA << 5);    // wdt_osc_clk = Fclkana/2, Fclkana = 3.5MHz
+    LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 17); // Enable Clock WWDT
+    LPC_SYSCON->PDRUNCFG &= ~(1 << 6);      // Enable Power WDTOSC_PD
+    uint32_t clk = ((3500000 / 2) / 4);         // COUNT = wdt_osc_clk/4
+    LPC_WWDT->TC = s * (float)clk;
+    LPC_WWDT->MOD = 0x3;                    // Enabled and Reset
 #endif
     kick();
 }
@@ -29,6 +36,9 @@
 #elif defined(TARGET_LPC11U24) || defined(TARGET_LPC11UXX)
     LPC_WWDT->FEED = 0xAA;
     LPC_WWDT->FEED = 0x55;
+#elif defined(TARGET_LPC81X) || defined(TARGET_LPC82X)
+    LPC_WWDT->FEED = 0xAA;
+    LPC_WWDT->FEED = 0x55;
 #endif
     __enable_irq();
 }
@@ -38,6 +48,8 @@
     return LPC_WDT->WDMOD & (1<<2) ? 1 : 0;
 #elif defined(TARGET_LPC11U24) || defined(TARGET_LPC11UXX)
     return LPC_WWDT->MOD & (1<<2) ? 1 : 0;
+#elif defined(TARGET_LPC81X) || defined(TARGET_LPC82X)
+    return LPC_WWDT->MOD & (1<<2) ? 1 : 0;
 #endif
 }
 
@@ -55,13 +67,23 @@
     LPC_SYSCON->PDRUNCFG &= ~(1<<6); // WDT on
     LPC_SYSCON->WDTOSCCTRL = (1<<5)|(0x1f<<0); // 500kHz / 64
 
-    LPC_WWDT->CLKSEL = (1<<0);               // Set CLK src to PCLK
-    uint32_t clk = 500000 / 64 / 4;    // WD has a fixed /4 prescaler, PCLK default is /4
+    LPC_WWDT->CLKSEL = (1<<0);               // Set CLK src to WDOSC
+    uint32_t clk = 500000 / 64 / 4;    // WD has a fixed /4 prescaler, WDOSC default is /4
     LPC_WWDT->TC = s * (float)clk;
     LPC_WWDT->WARNINT = 0;
     LPC_WWDT->MOD = 0x01;                   // Enabled but Reset disable
     kick();
     LPC_SYSCON->STARTERP1 |= (1<<12);
+#elif defined(TARGET_LPC81X) || defined(TARGET_LPC82X)
+    LPC_SYSCON->WDTOSCCTRL = (0xA << 5);    // wdt_osc_clk = Fclkana/2, Fclkana = 3.5MHz
+    LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 17); // Enable Clock WWDT
+    LPC_SYSCON->PDRUNCFG &= ~(1 << 6);      // Enable Power WDTOSC_PD
+    uint32_t clk = ((3500000 / 2) / 4);         // COUNT = wdt_osc_clk/4
+    LPC_WWDT->TC = s * (float)clk;
+    LPC_WWDT->WARNINT = 0;
+    LPC_WWDT->MOD = 0x1;                    // Enabled and Reset
+    kick();
+    LPC_SYSCON->STARTERP1 |= (1<<12);
 #endif
     NVIC_SetVector(WDT_IRQn, (uint32_t)&Watchdog::isr_wdt);
     NVIC_ClearPendingIRQ(WDT_IRQn);
@@ -83,6 +105,9 @@
 #elif defined(TARGET_LPC11U24) || defined(TARGET_LPC11UXX)
     LPC_WWDT->MOD |= (1<<3);
     LPC_WWDT->MOD &= ~(1<<2);
+#elif defined(TARGET_LPC81X) || defined(TARGET_LPC82X)
+    LPC_WWDT->MOD |= (1<<3);
+    LPC_WWDT->MOD &= ~(1<<2);
 #endif
     _fptr.call();
 }
@@ -92,6 +117,8 @@
     LPC_SC->PCON = 0;
 #elif defined(TARGET_LPC11U24) || defined(TARGET_LPC11UXX)
     LPC_PMU->PCON = 0;
+#elif defined(TARGET_LPC81X) || defined(TARGET_LPC82X)
+    LPC_PMU->PCON = 0;
 #endif
     SCB->SCR &= ~(1<<2);
     __WFI();
@@ -106,7 +133,31 @@
     LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
     LPC_PMU->PCON &= ~(7<<0);
     LPC_PMU->PCON |= (1<<0);
+#elif defined(TARGET_LPC81X) || defined(TARGET_LPC82X)
+    LPC_SYSCON->PDSLEEPCFG &= ~(1<<6); // WDT on
+    LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
+    LPC_PMU->PCON &= ~(7<<0);
+    LPC_PMU->PCON |= (1<<0);
 #endif
     SCB->SCR |= (1<<2);
     __WFI();
 }
+
+void Watchdog::powerDown () {
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    LPC_SC->PCON &= ~(7<<0);
+    LPC_SC->PCON |= (2<<0);
+#elif defined(TARGET_LPC11U24) || defined(TARGET_LPC11UXX)
+    LPC_SYSCON->PDSLEEPCFG &= ~(1<<6); // WDT on
+    LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
+    LPC_PMU->PCON &= ~(7<<0);
+    LPC_PMU->PCON = (2<<0);
+#elif defined(TARGET_LPC81X) || defined(TARGET_LPC82X)
+    LPC_SYSCON->PDSLEEPCFG &= ~(1<<6); // WDT on
+    LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
+    LPC_PMU->PCON &= ~(7<<0);
+    LPC_PMU->PCON = (2<<0);
+#endif
+    SCB->SCR |= (1<<2);
+    __WFI();
+}
--- a/WDT.h	Fri Jul 11 00:53:14 2014 +0000
+++ b/WDT.h	Wed May 25 08:52:32 2016 +0000
@@ -22,6 +22,7 @@
 
     void sleep ();
     void deepSleep ();
+    void powerDown ();
 
 private:
     static FunctionPointer _fptr;