Definetly, the solution is to implement a SPI interrupt routine, that triggers as soon as SPI data arrived. Any attempt to increase the complexity of the void loop completes with the failure in reading the SPI incoming bytes. As long as the void loop is kept simple and running fast there is no problem. All the characters are red inside the void loop. With the below code for Arduino DUE (a combination between Nick Gammon SPI Interrupt Routine and some codes found on internet), I succeeded to read the incoming bytes thru SPI. That's why I'm asking for professional help … Pos = 0 // set the current position "pos" to zeroĪbout the SPI protocol I know only general things. Serial.println (buf) // send the buffer value (string character) to Serial/USB main loop - wait for flag set in interrupt routineīuf = 0 // curent byte of the buffer (last one) is null } // end of interrupt routine SPI_STC_vect newline means it is the time to process the buffer add the grabbed byte to the buffer if enough room & increase the pos with a unit have to send on master in, *slave out*īyte c = SPDR // grab byte from SPI Data Register For this reason I need help to convert this sketch for Arduino DUE, but I have no idea how to do it. ![]() In my project I have to use a powerful microcontroller, like Atmel SAM3X. It is extremely useful to receive data thru SPI from a microprocessor, like Raspberry Pi. If(f_open(&fil, "first.Below is a sketch that include a SPI Interrupt Routine developed by Nick Gammon for Arduino AVR boards (SPI in Slave Mode). HAL_GPIO_WritePin(GPIOA,GPIO_PIN_9,GPIO_PIN_SET) //set CS on high * Initialize all configured peripherals */ * Reset of all peripherals, Initializes the Flash interface and the Systick. * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * OR PROFITS OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOSS OF USE, DATA, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" * this license is void and will automatically terminate your rights under Redistribution and use of this software other than as permitted under * microprocessor devices manufactured by or for STMicroelectronics. * software, must execute solely and exclusively on microcontroller or This software, including modifications and/or derivative works of this ![]() * derived from this software without specific written permission. * contributors to this software may be used to endorse or promote products Neither the name of STMicroelectronics nor the names of other * and/or other materials provided with the distribution. * this list of conditions and the following disclaimer in the documentation Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer. Redistribution of source code must retain the above copyright notice, * modification, are permitted, provided that the following conditions are met: * Redistribution and use in source and binary forms, with or without * Copyright (c) 2019 STMicroelectronics International N.V. * are owned by their respective copyright owners. * inserted by the user or by software development tools * that are not between comment pairs USER CODE BEGIN and * This notice applies to any and all portions of this file The function f_open () returns the value FR_NOT_READY. In my previous attempt, I connected the microcontroller to the SD card module as follows:ĭid I properly connect the SD card to the microcontroller? What are CMD and CD? What do D0 to D3 serve? How would SDIO look like the configuration and physical connections from the microcontroller to the SD card?Īt first I tried it with HAL_SPI_Transmit () and finally with the code below as described at. ![]() My problem is that I have not yet seen any reasonable documentation that tells me how to properly connect the SD card to a microcontroller. As a microcontroller I use the STM32L073RZT6 and the SD card module from Waveshare, which has an SDIO and SPI interface. Now I try to write data to an SD card, unfortunately so far without success. So far, I was able to successfully implement SPI and I2C on a temperature sensor. I am new to the world of stm and STM32CubeMX.
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