111 lines
2.9 KiB
C
111 lines
2.9 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2014 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/*
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Concepts and parts of this file have been contributed by Uladzimir Pylinsky
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aka barthess.
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*/
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#include "ch.h"
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#include "hal.h"
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/*
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******************************************************************************
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* DEFINES
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******************************************************************************
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*/
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#define SPI_BUF_SIZE 512
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/*
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******************************************************************************
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* EXTERNS
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******************************************************************************
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*/
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/*
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******************************************************************************
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* PROTOTYPES
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******************************************************************************
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*/
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static void spi_end_cb(SPIDriver *spip);
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/*
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******************************************************************************
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* GLOBAL VARIABLES
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******************************************************************************
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*/
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static uint8_t testbuf_ram[SPI_BUF_SIZE];
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static const uint8_t testbuf_flash[SPI_BUF_SIZE];
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/*
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*
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*/
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static const SPIConfig spicfg = {
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spi_end_cb,
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GPIOA,
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GPIOA_SPI1_NSS,
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0, //SPI_CR1_BR_1 | SPI_CR1_BR_0
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};
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static uint32_t its;
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static binary_semaphore_t sem;
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static bool stop = false;
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/*
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******************************************************************************
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******************************************************************************
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* LOCAL FUNCTIONS
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******************************************************************************
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******************************************************************************
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*/
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static void spi_end_cb(SPIDriver *spip){
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its++;
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if (stop){
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chSysLockFromISR();
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chBSemSignalI(&sem);
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chSysUnlockFromISR();
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return;
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}
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else{
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chSysLockFromISR();
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spiStartExchangeI(spip, SPI_BUF_SIZE, testbuf_flash, testbuf_ram);
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chSysUnlockFromISR();
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}
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}
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/*
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******************************************************************************
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* EXPORTED FUNCTIONS
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******************************************************************************
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*/
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void dma_storm_spi_start(void){
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its = 0;
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stop = false;
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chBSemObjectInit(&sem, true);
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spiStart(&SPID1, &spicfg);
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spiStartExchange(&SPID1, SPI_BUF_SIZE, testbuf_flash, testbuf_ram);
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}
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uint32_t dma_storm_spi_stop(void){
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stop = true;
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chBSemWait(&sem);
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spiStop(&SPID1);
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return its;
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}
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