Lancaster University
/
mbed-src
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Diff: targets/hal/TARGET_NXP/TARGET_LPC43XX/us_ticker.c
- Revision:
- 300:55638feb26a4
- Parent:
- 294:78f9587bb26d
- Child:
- 304:89b9c3a9a045
--- a/targets/hal/TARGET_NXP/TARGET_LPC43XX/us_ticker.c Wed Aug 27 04:00:07 2014 +0100
+++ b/targets/hal/TARGET_NXP/TARGET_LPC43XX/us_ticker.c Wed Aug 27 08:45:06 2014 +0100
@@ -27,16 +27,16 @@
void us_ticker_init(void) {
if (us_ticker_inited) return;
us_ticker_inited = 1;
-
+
US_TICKER_TIMER->CTCR = 0x0; // timer mode
uint32_t PCLK = SystemCoreClock;
US_TICKER_TIMER->TCR = 0x2; // reset
-
+
uint32_t prescale = PCLK / 1000000; // default to 1MHz (1 us ticks)
US_TICKER_TIMER->PR = prescale - 1;
US_TICKER_TIMER->TCR = 1; // enable = 1, reset = 0
-
+
NVIC_SetVector(US_TICKER_TIMER_IRQn, (uint32_t)us_ticker_irq_handler);
NVIC_EnableIRQ(US_TICKER_TIMER_IRQn);
}
@@ -44,7 +44,7 @@
uint32_t us_ticker_read() {
if (!us_ticker_inited)
us_ticker_init();
-
+
return US_TICKER_TIMER->TC;
}