Squashed 'tmk_core/' changes from 7967731..b9e0ea0

b9e0ea0 Merge commit '7fa9d8bdea3773d1195b04d98fcf27cf48ddd81d' as 'tool/mbed/mbed-sdk'
7fa9d8b Squashed 'tool/mbed/mbed-sdk/' content from commit 7c21ce5

git-subtree-dir: tmk_core
git-subtree-split: b9e0ea08cb940de20b3610ecdda18e9d8cd7c552

tool/mbed/mbed-sdk/libraries/tests/KL25Z/lptmr/main.cpp

@@ -0,0 +1,48 @@
+#include "mbed.h"
+
+volatile unsigned int ticks = 0;
+
+DigitalOut led(LED_BLUE);
+
+extern "C" void lptmr_isr(void) {
+    // write 1 to TCF to clear the LPT timer compare flag
+    LPTMR0->CSR |= LPTMR_CSR_TCF_MASK;
+
+    ticks++;
+}
+
+int main() {
+    /* Clock the timer */
+    SIM->SCGC5 |= SIM_SCGC5_LPTMR_MASK;
+
+    /* Reset */
+    LPTMR0->CSR = 0;
+
+    /* Compare value */
+    LPTMR0->CMR = 1000;
+
+    /* Enable interrupt */
+    LPTMR0->CSR |= LPTMR_CSR_TIE_MASK;
+
+    /* Set interrupt handler */
+    NVIC_SetVector(LPTimer_IRQn, (uint32_t)lptmr_isr);
+    NVIC_EnableIRQ(LPTimer_IRQn);
+
+    /* select LPO for RTC and LPTMR */
+    LPTMR0->PSR = LPTMR_PSR_PCS(3);       // ERCLK32K -> 8MHz
+    LPTMR0->PSR |= LPTMR_PSR_PRESCALE(2); // divide by 8
+
+    /* Start the timer */
+    LPTMR0->CSR |= LPTMR_CSR_TEN_MASK;
+
+    led = 0;
+    while (true) {
+        wait(1);
+        led = 1;
+        printf("%d\n", ticks);
+
+        wait(1);
+        led = 0;
+        printf("%d\n", ticks);
+    }
+}