Li Menglu
/
nRF51822
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Dependents: BLE_Acceleration_Statejudging
Fork of
nRF51822
by 
Nordic Semiconductor
Diff: nordic/nrf-sdk/nrf_delay.h
- Revision:
- 47:db25ca6ed092
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/nordic/nrf-sdk/nrf_delay.h Wed Jul 16 10:56:11 2014 +0100
@@ -0,0 +1,74 @@
+#ifndef _NRF_DELAY_H
+#define _NRF_DELAY_H
+
+// #include "nrf.h"
+
+/*lint --e{438, 522} "Variable not used" "Function lacks side-effects" */
+#if defined ( __CC_ARM )
+static __ASM void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
+{
+loop
+ SUBS R0, R0, #1
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ BNE loop
+ BX LR
+}
+#elif defined ( __ICCARM__ )
+static void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
+{
+__ASM (
+"loop:\n\t"
+ " SUBS R0, R0, #1\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+ " BNE loop\n\t");
+}
+#elif defined ( __GNUC__ )
+static void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
+{
+ do
+ {
+ __ASM volatile (
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ "NOP\n\t"
+ );
+ } while (--number_of_us);
+}
+#endif
+
+void nrf_delay_ms(uint32_t volatile number_of_ms);
+
+#endif