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-rw-r--r--os/hal/ports/NRF5/NRF52832/nrf_delay.h335
1 files changed, 238 insertions, 97 deletions
diff --git a/os/hal/ports/NRF5/NRF52832/nrf_delay.h b/os/hal/ports/NRF5/NRF52832/nrf_delay.h
index 9b5df64..b73d8ae 100644
--- a/os/hal/ports/NRF5/NRF52832/nrf_delay.h
+++ b/os/hal/ports/NRF5/NRF52832/nrf_delay.h
@@ -1,97 +1,238 @@
-/*
- Copyright (C) 2015 Stephen Caudle
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-*/
-
-/**
- * @file NRF5/NRF52832/nrf_delay.h
- * @brief NRF5 Delay routines
- *
- * @{
- */
-
-#ifndef _NRF_DELAY_H
-#define _NRF_DELAY_H
-
-inline static void nrf_delay_us(uint32_t volatile number_of_us) __attribute__((always_inline));
-inline static void nrf_delay_us(uint32_t volatile number_of_us)
-{
-register uint32_t delay __asm ("r0") = number_of_us;
-__asm volatile (
-".syntax unified\n"
- "1:\n"
- " SUBS %0, %0, #1\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " NOP\n"
- " BNE 1b\n"
- ".syntax divided\n"
- : "+r" (delay));
-}
-#endif //__NRF_DELAY_H
+#ifndef _NRF_DELAY_H
+#define _NRF_DELAY_H
+
+/**
+ * @brief Function for delaying execution for number of microseconds.
+ *
+ * @note NRF52 has instruction cache and because of that delay is not precise.
+ *
+ * @param number_of_ms
+ */
+/*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
+#ifdef NRF52
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+#endif
+ 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"
+#ifdef NRF52
+ " 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"
+ " 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"
+ " 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"
+ " NOP\n\t"
+ " NOP\n\t"
+ " NOP\n\t"
+#endif
+ " BNE.n loop\n\t");
+}
+
+#elif defined ( _WIN32 ) || defined ( __unix ) || defined( __APPLE__ )
+
+__STATIC_INLINE void nrf_delay_us(uint32_t volatile number_of_us);
+
+#ifndef CUSTOM_NRF_DELAY_US
+__STATIC_INLINE void nrf_delay_us(uint32_t volatile number_of_us)
+{}
+#endif
+
+#elif defined ( __GNUC__ )
+
+inline static void nrf_delay_us(uint32_t volatile number_of_us) __attribute__((always_inline));
+inline static void nrf_delay_us(uint32_t volatile number_of_us)
+{
+register uint32_t delay __ASM ("r0") = number_of_us;
+__ASM volatile (
+#ifdef NRF51
+ ".syntax unified\n"
+#endif
+ "1:\n"
+ " SUBS %0, %0, #1\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+#ifdef NRF52
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+ " NOP\n"
+#endif
+ " BNE 1b\n"
+#ifdef NRF51
+ ".syntax divided\n"
+#endif
+ : "+r" (delay));
+}
+#endif
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-20 12:15:30 +0000