diff options
Diffstat (limited to 'Marlin/src/HAL/STM32F1/HAL_SPI.cpp')
| -rw-r--r-- | Marlin/src/HAL/STM32F1/HAL_SPI.cpp | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/Marlin/src/HAL/STM32F1/HAL_SPI.cpp b/Marlin/src/HAL/STM32F1/HAL_SPI.cpp new file mode 100644 index 0000000..7e876f7 --- /dev/null +++ b/Marlin/src/HAL/STM32F1/HAL_SPI.cpp @@ -0,0 +1,171 @@ +/** + * Marlin 3D Printer Firmware + * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin] + * + * Based on Sprinter and grbl. + * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm + * Copyright (c) 2017 Victor Perez + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + * + */ + +/** + * Software SPI functions originally from Arduino Sd2Card Library + * Copyright (c) 2009 by William Greiman + * Adapted to the STM32F1 HAL + */ + +#ifdef __STM32F1__ + +#include "../../inc/MarlinConfig.h" +#include <SPI.h> + +// ------------------------ +// Public functions +// ------------------------ + +#if ENABLED(SOFTWARE_SPI) + + // ------------------------ + // Software SPI + // ------------------------ + #error "Software SPI not supported for STM32F1. Use hardware SPI." + +#else + +// ------------------------ +// Hardware SPI +// ------------------------ + +/** + * VGPV SPI speed start and F_CPU/2, by default 72/2 = 36Mhz + */ + +/** + * @brief Begin SPI port setup + * + * @return Nothing + * + * @details Only configures SS pin since libmaple creates and initialize the SPI object + */ +void spiBegin() { + #if PIN_EXISTS(SD_SS) + OUT_WRITE(SD_SS_PIN, HIGH); + #endif +} + +/** + * @brief Initialize SPI port to required speed rate and transfer mode (MSB, SPI MODE 0) + * + * @param spiRate Rate as declared in HAL.h (speed do not match AVR) + * @return Nothing + * + * @details + */ +void spiInit(uint8_t spiRate) { + /** + * STM32F1 APB2 = 72MHz, APB1 = 36MHz, max SPI speed of this MCU if 18Mhz + * STM32F1 has 3 SPI ports, SPI1 in APB2, SPI2/SPI3 in APB1 + * so the minimum prescale of SPI1 is DIV4, SPI2/SPI3 is DIV2 + */ + #if SPI_DEVICE == 1 + #define SPI_CLOCK_MAX SPI_CLOCK_DIV4 + #else + #define SPI_CLOCK_MAX SPI_CLOCK_DIV2 + #endif + uint8_t clock; + switch (spiRate) { + case SPI_FULL_SPEED: clock = SPI_CLOCK_MAX ; break; + case SPI_HALF_SPEED: clock = SPI_CLOCK_DIV4 ; break; + case SPI_QUARTER_SPEED: clock = SPI_CLOCK_DIV8 ; break; + case SPI_EIGHTH_SPEED: clock = SPI_CLOCK_DIV16; break; + case SPI_SPEED_5: clock = SPI_CLOCK_DIV32; break; + case SPI_SPEED_6: clock = SPI_CLOCK_DIV64; break; + default: clock = SPI_CLOCK_DIV2; // Default from the SPI library + } + SPI.setModule(SPI_DEVICE); + SPI.begin(); + SPI.setClockDivider(clock); + SPI.setBitOrder(MSBFIRST); + SPI.setDataMode(SPI_MODE0); +} + +/** + * @brief Receive a single byte from the SPI port. + * + * @return Byte received + * + * @details + */ +uint8_t spiRec() { + uint8_t returnByte = SPI.transfer(0xFF); + return returnByte; +} + +/** + * @brief Receive a number of bytes from the SPI port to a buffer + * + * @param buf Pointer to starting address of buffer to write to. + * @param nbyte Number of bytes to receive. + * @return Nothing + * + * @details Uses DMA + */ +void spiRead(uint8_t* buf, uint16_t nbyte) { + SPI.dmaTransfer(0, const_cast<uint8_t*>(buf), nbyte); +} + +/** + * @brief Send a single byte on SPI port + * + * @param b Byte to send + * + * @details + */ +void spiSend(uint8_t b) { + SPI.send(b); +} + +/** + * @brief Write token and then write from 512 byte buffer to SPI (for SD card) + * + * @param buf Pointer with buffer start address + * @return Nothing + * + * @details Use DMA + */ +void spiSendBlock(uint8_t token, const uint8_t* buf) { + SPI.send(token); + SPI.dmaSend(const_cast<uint8_t*>(buf), 512); +} + +#if ENABLED(SPI_EEPROM) + +// Read single byte from specified SPI channel +uint8_t spiRec(uint32_t chan) { return SPI.transfer(0xFF); } + +// Write single byte to specified SPI channel +void spiSend(uint32_t chan, byte b) { SPI.send(b); } + +// Write buffer to specified SPI channel +void spiSend(uint32_t chan, const uint8_t* buf, size_t n) { + for (size_t p = 0; p < n; p++) spiSend(chan, buf[p]); +} + +#endif // SPI_EEPROM + +#endif // SOFTWARE_SPI + +#endif // __STM32F1__ |