I added functionality to get the RSSI, BER, and Cell Neighbor for reporting connection issues to M2X
Dependencies: WncControllerK64F
mbedtls/source/entropy_hardware_poll.c
- Committer:
- JMF
- Date:
- 2016-11-17
- Revision:
- 18:198e9b0acf11
- Parent:
- 12:0071cb144c7a
File content as of revision 18:198e9b0acf11:
/* * Hardware entropy collector for the K64F, using Freescale's RNGA * * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved * SPDX-License-Identifier: Apache-2.0 * * 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. * * This file is part of mbed TLS (https://tls.mbed.org) */ /* * WARNING: this is temporary! * This should be in a separate yotta module which would be a target * dependency of mbedtls (see IOTSSL-313) */ #if defined(TARGET_LIKE_K64F) /* * Reference: "K64 Sub-Family Reference Manual, Rev. 2", chapter 34 */ #include "fsl_clock_manager.h" /* * Get one byte of entropy from the RNG, assuming it is up and running. * As recommended (34.1.1), get only one bit of each output. */ static void rng_get_byte( unsigned char *byte ) { size_t bit; /* 34.5 Steps 3-4-5: poll SR and read from OR when ready */ for( bit = 0; bit < 8; bit++ ) { while( ( RNG->SR & RNG_SR_OREG_LVL_MASK ) == 0 ); *byte |= ( RNG->OR & 1 ) << bit; } } /* * Get len bytes of entropy from the hardware RNG. */ int mbedtls_hardware_poll( void *data, unsigned char *output, size_t len, size_t *olen ) { size_t i; int ret; ((void) data); CLOCK_SYS_EnableRngaClock( 0 ); /* Set "Interrupt Mask", "High Assurance" and "Go", * unset "Clear interrupt" and "Sleep" */ RNG->CR = RNG_CR_INTM_MASK | RNG_CR_HA_MASK | RNG_CR_GO_MASK; for( i = 0; i < len; i++ ) rng_get_byte( output + i ); /* Just be extra sure that we didn't do it wrong */ if( ( RNG->SR & RNG_SR_SECV_MASK ) != 0 ) { ret = -1; goto cleanup; } *olen = len; ret = 0; cleanup: /* Disable clock to save power - assume we're the only users of RNG */ CLOCK_SYS_DisableRngaClock( 0 ); return( ret ); } #endif