245 lines
7.1 KiB
C
245 lines
7.1 KiB
C
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/* spi.c
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*
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* high level spi implementation
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*
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* Copyright 2013 RPH Engineering, VPI Engineering
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*/
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#include "spi.h"
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#include <hal.h>
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#include <stm32f4xx_hal_spi.h>
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#include <stm32f4xx_hal_gpio.h>
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//#include <stm32f415xx.h>
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#include <stm32f4xx_hal.h>
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//static int spi2Semaphore;
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//SPI_HandleTypeDef SpiHandle;
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void spi_init(void)
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{
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// set up the used SPI (SPI2) and pins
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SPI_InitTypeDef spiInitStructure;
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GPIO_InitTypeDef gpioInitStructure;
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HAL_SPI_MspInit(&SpiHandle);
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__SPI1_CLK_ENABLE();
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// // SPI2 SCK and MOSI
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// gpioInitStructure.GPIO_Pin = SPI1_SCK.pin;
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// gpioInitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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// gpioInitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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// GPIO_Init(SPI1_SCK.port, &gpioInitStructure);
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//
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// gpioInitStructure.GPIO_Pin = SPI1_MOSI.pin;
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// gpioInitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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// gpioInitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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// GPIO_Init(SPI1_MOSI.port, &gpioInitStructure);
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//
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// // SPI2 MISO
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// gpioInitStructure.GPIO_Pin = SPI1_MISO.pin;
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// gpioInitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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// gpioInitStructure.GPIO_Mode = GPIO_Mode_IPU;
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// GPIO_Init(SPI1_MISO.port, &gpioInitStructure);
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//
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// // RFID NSS
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// gpioInitStructure.GPIO_Pin = LCD_NSS.pin;
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// gpioInitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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// gpioInitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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// GPIO_Init(LCD_NSS.port, &gpioInitStructure);
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// GPIO_WriteBit(LCD_NSS.port, LCD_NSS.pin, (BitAction)1); // TBD - should this be before init?
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// SPI2 SCK and MOSI
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gpioInitStructure.Pin = SPI1_SCK.pin;
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gpioInitStructure.Speed = GPIO_SPEED_FAST;
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gpioInitStructure.Mode = GPIO_MODE_AF_PP;
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gpioInitStructure.Alternate = GPIO_AF5_SPI1;
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//gpioInitStructure.Mode = GPIO_MODE_OUTPUT_PP;
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gpioInitStructure.Pull = GPIO_NOPULL;
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//gpioInitStructure.Alternate = 1;
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HAL_GPIO_Init(SPI1_SCK.port, &gpioInitStructure);
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gpioInitStructure.Pin = SPI1_MOSI.pin;
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gpioInitStructure.Speed = GPIO_SPEED_FAST;
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gpioInitStructure.Mode = GPIO_MODE_AF_PP;
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//gpioInitStructure.Mode = GPIO_MODE_OUTPUT_PP;
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gpioInitStructure.Pull = GPIO_NOPULL;
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gpioInitStructure.Alternate = GPIO_AF5_SPI1;
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HAL_GPIO_Init(SPI1_MOSI.port, &gpioInitStructure);
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// SPI2 MISO
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gpioInitStructure.Pin = SPI1_MISO.pin;
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gpioInitStructure.Speed = GPIO_SPEED_FAST;
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gpioInitStructure.Mode = GPIO_MODE_INPUT;
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gpioInitStructure.Pull = GPIO_PULLUP;
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gpioInitStructure.Alternate = GPIO_AF5_SPI1;
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HAL_GPIO_Init(SPI1_MISO.port, &gpioInitStructure);
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// RFID NSS
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gpioInitStructure.Pin = LCD_NSS.pin;
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gpioInitStructure.Speed = GPIO_SPEED_FAST;
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gpioInitStructure.Mode = GPIO_MODE_OUTPUT_PP;
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gpioInitStructure.Pull = GPIO_NOPULL;
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gpioInitStructure.Alternate = 0;
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HAL_GPIO_Init(LCD_NSS.port, &gpioInitStructure);
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HAL_GPIO_WritePin(LCD_NSS.port, LCD_NSS.pin, 1); // TBD - should this be before init?
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// Accelerometer NSS
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// gpioInitStructure.GPIO_Pin = ACCEL_NSS.pin;
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// gpioInitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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// gpioInitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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// GPIO_Init(ACCEL_NSS.port, &gpioInitStructure);
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// GPIO_WriteBit(ACCEL_NSS.port, ACCEL_NSS.pin, (BitAction)1); // TBD - should this be before init?
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// init semaphore
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// spi2Semaphore = 1;
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//GPIO_PinRemapConfig(GPIO_Remap_SPI1, ENABLE); //So I can use the other SPI1 pins? (To keep the DACs availble)
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//GPIO_Remap_SPI1
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// SPI 1
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// SPI_StructInit(&spiInitStructure);
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//spiInitStructure.
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//HAL_SPI_
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SpiHandle.Instance = SPI1;
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SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;// SPI_Direction_2Lines_FullDuplex;
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SpiHandle.Init.Mode = SPI_MODE_MASTER; // SPI_Mode_Master;
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SpiHandle.Init.DataSize = SPI_DATASIZE_8BIT; // SPI_DataSize_8b;
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SpiHandle.Init.CLKPolarity /*CPOL*/ = SPI_POLARITY_HIGH; // SPI_C SPI_CPOL_High;
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SpiHandle.Init.CLKPhase /*CPHA*/ = SPI_PHASE_2EDGE; // SPI_CPHA_2Edge;
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SpiHandle.Init.NSS = SPI_NSS_SOFT; // SPI_NSS_Soft;
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SpiHandle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2; //SPI_BaudRatePrescaler_2;
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SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB; // SPI_FirstBit_MSB;
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SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
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SpiHandle.Init.TIMode = SPI_TIMODE_DISABLED;
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SpiHandle.Init.CRCPolynomial = 7;
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if(HAL_SPI_Init(&SpiHandle) != HAL_OK)
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{
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/* Initialization Error */
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//Error_Handler();
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}
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//HAL_SPI_TransmitReceive();
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//SPI_Cmd(SPI2, ENABLE);
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}
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//int spi_getSpi2Semaphore(void)
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//{
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// // tries to take the spi2 semaphore
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// // returns 0 if semaphore successfully taken, -1 if not
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//
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// int status = 0;
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//
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// if( spi2Semaphore > 0 )
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// spi2Semaphore = 0;
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// else
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// status = -1;
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//
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// return status;
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//}
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//void spi_postSpi2Semaphore(void)
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//{
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// // post (make available) spi2 semaphore
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//
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// spi2Semaphore = 1;
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//}
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void spi_readWrite(SPI_HandleTypeDef SpiH, uint8_t* rxBuf, uint8_t* txBuf, int cnt)
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{
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//HAL_SPI_TransmitReceive(&SpiHandle, txBuf, rxBuf, cnt, 1000);
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HAL_SPI_Transmit(&SpiHandle, txBuf, cnt, 1);
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// //High, second edge
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// //We're going to bitbang it for now, I guess
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// HAL_GPIO_WritePin(SPI1_SCK.port, SPI1_SCK.pin, 0);
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// HAL_GPIO_WritePin(LCD_NSS.port, LCD_NSS.pin, 0);
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// int i, j;
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// for(i = 0; i < cnt; i++)
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// {
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// for(j = 0; j < 8; j++)
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// {
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// HAL_GPIO_WritePin(SPI1_MOSI.port, SPI1_MOSI.pin, (txBuf[i] >> (7 - j)) & 1);
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// HAL_GPIO_WritePin(SPI1_SCK.port, SPI1_SCK.pin, 0);
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// HAL_GPIO_WritePin(SPI1_SCK.port, SPI1_SCK.pin, 1);
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// }
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// }
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// HAL_GPIO_WritePin(LCD_NSS.port, LCD_NSS.pin, 1);
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}
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//int spi_readWrite(SPI_TypeDef* SPIx, uint8_t *rxBuf, const uint8_t *txBuf, int cnt, uint16_t speed)
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//{
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// // send data to the spi bus, read data in from the spi bus
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// // returns the number of bytes written/read
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//
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// enum { maxTries = 5000 };
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//
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// int i;
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// uint32_t tries;
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//
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// // since everything currently runs at the same speed, we will not set the speed each time
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// // we will leave the set speed line here in case that changes
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// //SPIx->CR1 = (SPIx->CR1 & -SPI_BaudRatePrescaler_256) | speed;
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//
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// if( cnt >= 0 )
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// {
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// for( i = 0; i < cnt; ++i )
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// {
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// if( txBuf )
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// {
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// SPI_I2S_SendData(SPIx, *txBuf++);
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// HAL_spi
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// }
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// else
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// {
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// SPI_I2S_SendData(SPIx, 0xff);
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// }
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//
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// tries = 0;
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// while( SPI_I2S_GetFlagStatus(SPIx, SPI_FLAG_RXNE /*SPI_I2S_FLAG_RXNE*/) == RESET && tries < maxTries )
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// ++tries;
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//
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// if( tries >= maxTries )
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// {
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// // did not get rx data in indication, re-init spi
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// spi_init();
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// }
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//
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// if( rxBuf )
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// {
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// *rxBuf++ = SPI_I2S_ReceiveData(SPIx);
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// }
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// else
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// {
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// SPI_I2S_ReceiveData(SPIx);
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// }
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// }
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// }
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// else
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// {
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// i = -1;
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// }
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//
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// return i;
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//}
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