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Diffstat (limited to 'Marlin/src/HAL/STM32/HAL_SPI.cpp')
| -rw-r--r-- | Marlin/src/HAL/STM32/HAL_SPI.cpp | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/Marlin/src/HAL/STM32/HAL_SPI.cpp b/Marlin/src/HAL/STM32/HAL_SPI.cpp new file mode 100644 index 0000000..eef4807 --- /dev/null +++ b/Marlin/src/HAL/STM32/HAL_SPI.cpp @@ -0,0 +1,219 @@ +/** + * 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/>. + * + */ +#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) + +#include "../../inc/MarlinConfig.h" + +#include <SPI.h> + +// ------------------------ +// Public Variables +// ------------------------ + +static SPISettings spiConfig; + +// ------------------------ +// Public functions +// ------------------------ + +#if ENABLED(SOFTWARE_SPI) + + // ------------------------ + // Software SPI + // ------------------------ + + #include "../shared/Delay.h" + + void spiBegin(void) { + OUT_WRITE(SD_SS_PIN, HIGH); + OUT_WRITE(SD_SCK_PIN, HIGH); + SET_INPUT(SD_MISO_PIN); + OUT_WRITE(SD_MOSI_PIN, HIGH); + } + + static uint16_t delay_STM32_soft_spi; + + void spiInit(uint8_t spiRate) { + // Use datarates Marlin uses + switch (spiRate) { + case SPI_FULL_SPEED: delay_STM32_soft_spi = 125; break; // desired: 8,000,000 actual: ~1.1M + case SPI_HALF_SPEED: delay_STM32_soft_spi = 125; break; // desired: 4,000,000 actual: ~1.1M + case SPI_QUARTER_SPEED:delay_STM32_soft_spi = 250; break; // desired: 2,000,000 actual: ~890K + case SPI_EIGHTH_SPEED: delay_STM32_soft_spi = 500; break; // desired: 1,000,000 actual: ~590K + case SPI_SPEED_5: delay_STM32_soft_spi = 1000; break; // desired: 500,000 actual: ~360K + case SPI_SPEED_6: delay_STM32_soft_spi = 2000; break; // desired: 250,000 actual: ~210K + default: delay_STM32_soft_spi = 4000; break; // desired: 125,000 actual: ~123K + } + SPI.begin(); + } + + // Begin SPI transaction, set clock, bit order, data mode + void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) { /* do nothing */ } + + uint8_t HAL_SPI_STM32_SpiTransfer_Mode_3(uint8_t b) { // using Mode 3 + for (uint8_t bits = 8; bits--;) { + WRITE(SD_SCK_PIN, LOW); + WRITE(SD_MOSI_PIN, b & 0x80); + + DELAY_NS(delay_STM32_soft_spi); + WRITE(SD_SCK_PIN, HIGH); + DELAY_NS(delay_STM32_soft_spi); + + b <<= 1; // little setup time + b |= (READ(SD_MISO_PIN) != 0); + } + DELAY_NS(125); + return b; + } + + // Soft SPI receive byte + uint8_t spiRec() { + DISABLE_ISRS(); // No interrupts during byte receive + const uint8_t data = HAL_SPI_STM32_SpiTransfer_Mode_3(0xFF); + ENABLE_ISRS(); // Enable interrupts + return data; + } + + // Soft SPI read data + void spiRead(uint8_t *buf, uint16_t nbyte) { + for (uint16_t i = 0; i < nbyte; i++) + buf[i] = spiRec(); + } + + // Soft SPI send byte + void spiSend(uint8_t data) { + DISABLE_ISRS(); // No interrupts during byte send + HAL_SPI_STM32_SpiTransfer_Mode_3(data); // Don't care what is received + ENABLE_ISRS(); // Enable interrupts + } + + // Soft SPI send block + void spiSendBlock(uint8_t token, const uint8_t *buf) { + spiSend(token); + for (uint16_t i = 0; i < 512; i++) + spiSend(buf[i]); + } + +#else + + // ------------------------ + // Hardware SPI + // ------------------------ + + /** + * VGPV SPI speed start and PCLK2/2, by default 108/2 = 54Mhz + */ + + /** + * @brief Begin SPI port setup + * + * @return Nothing + * + * @details Only configures SS pin since stm32duino creates and initialize the SPI object + */ + void spiBegin() { + #if PIN_EXISTS(SD_SS) + OUT_WRITE(SD_SS_PIN, HIGH); + #endif + } + + // Configure SPI for specified SPI speed + void spiInit(uint8_t spiRate) { + // Use datarates Marlin uses + uint32_t clock; + switch (spiRate) { + case SPI_FULL_SPEED: clock = 20000000; break; // 13.9mhz=20000000 6.75mhz=10000000 3.38mhz=5000000 .833mhz=1000000 + case SPI_HALF_SPEED: clock = 5000000; break; + case SPI_QUARTER_SPEED: clock = 2500000; break; + case SPI_EIGHTH_SPEED: clock = 1250000; break; + case SPI_SPEED_5: clock = 625000; break; + case SPI_SPEED_6: clock = 300000; break; + default: + clock = 4000000; // Default from the SPI library + } + spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0); + + #if ENABLED(CUSTOM_SPI_PINS) + SPI.setMISO(SD_MISO_PIN); + SPI.setMOSI(SD_MOSI_PIN); + SPI.setSCLK(SD_SCK_PIN); + #endif + + SPI.begin(); + } + + /** + * @brief Receives 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) { + if (nbyte == 0) return; + memset(buf, 0xFF, nbyte); + SPI.transfer(buf, nbyte); + } + + /** + * @brief Send a single byte on SPI port + * + * @param b Byte to send + * + * @details + */ + void spiSend(uint8_t b) { + SPI.transfer(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) { + uint8_t rxBuf[512]; + SPI.transfer(token); + SPI.transfer((uint8_t*)buf, &rxBuf, 512); + } + +#endif // SOFTWARE_SPI + +#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC |