#ifndef __SPI_FLASH_CONFIG_H
#define __SPI_FLASH_CONFIG_H

#include "stm32f4xx.h"

#define USE_DMA

/* M25P SPI Flash supported commands */
#define sFLASH_CMD_WRITE        0x02 /* Write to Memory instruction */
#define sFLASH_CMD_WRSR         0x01 /* Write Status Register instruction */
#define sFLASH_CMD_WREN         0x06 /* Write enable instruction */
#define sFLASH_CMD_READ         0x03 /* Read from Memory instruction */
#define sFLASH_CMD_RDSR         0x05 /* Read Status Register instruction  */
#define sFLASH_CMD_RDID         0x9F /* Read identification */
#define sFLASH_CMD_SE           0xD8 /* Sector Erase instruction */
#define sFLASH_CMD_SSE          0x20 /* Small Sector Erase instruction (4K-byte) */
#define sFLASH_CMD_BE           0xC7 /* Bulk Erase instruction */

#define sFLASH_WIP_FLAG         0x01 /* Write In Progress (WIP) flag */

#define sFLASH_DUMMY_BYTE       0xFF /* Just a high level */
#define sFLASH_SPI_PAGESIZE     0x100
#define sFLASH_SPI_MASK         (sFLASH_SPI_PAGESIZE - 1U)

#define sFLASH_M25P128_ID       0x202018
#define sFLASH_M25P64_ID        0x202017
#define sFLASH_GD25Q127C_ID     0xC84018

/* DMA defs */
#define sFLASH_DMA                      DMA2
#define sFLASH_DMA_CLK                  RCC_AHB1Periph_DMA2
#define sFLASH_DMA_CLK_ENR              RCC->AHB1ENR

#define sFLASH_DMA_TX_FLAG_HT           DMA_FLAG_HTIF3
#define sFLASH_DMA_TX_FLAG_TC           DMA_FLAG_TCIF3
#define sFLASH_DMA_TX_FLAG_GL           (DMA_FLAG_HTIF3 | DMA_FLAG_TCIF3)

#define sFLASH_DMA_RX_FLAG_HT           DMA_FLAG_HTIF0
#define sFLASH_DMA_RX_FLAG_TC           DMA_FLAG_TCIF0
#define sFLASH_DMA_RX_FLAG_GL           (DMA_FLAG_HTIF0 | DMA_FLAG_TCIF0)

#define sFLASH_DMA_TX_CHANNEL           DMA_Channel_3
#define sFLASH_DMA_RX_CHANNEL           DMA_Channel_3
#define sFLASH_DMA_TX_STREAM            DMA2_Stream3
#define sFLASH_DMA_RX_STREAM            DMA2_Stream0

#define sFLASH_DMA_ISR                  LISR
#define sFLASH_DMA_IFCR                 LIFCR

#define DMA_CCR_EN                      DMA_SxCR_EN
#define DMA_CCR_DIR                     DMA_SxCR_DIR
#define DMA_CCR_MINC                    DMA_SxCR_MINC
#define CCR                             CR
#define CNDTR                           NDTR
#define CPAR                            PAR
#define CMAR                            M0AR

/* M25P FLASH SPI Interface pins  */
#define sFLASH_SPI                      SPI1
#define sFLASH_SPI_CLK                  RCC_APB2Periph_SPI1
#define sFLASH_SPI_CLK_ENR              RCC->APB2ENR
#define sFLASH_SPI_IRQn                 SPI1_IRQn
#define sFLASH_SPI_IRQHandler           SPI1_IRQHandler

#define sFLASH_SPI_SCK_PIN              GPIO_Pin_5
#define sFLASH_SPI_SCK_GPIO_PORT        GPIOA
#define sFLASH_SPI_SCK_GPIO_CLK         RCC_AHB1Periph_GPIOA
#define sFLASH_SPI_SCK_SOURCE           GPIO_PinSource5
#define sFLASH_SPI_SCK_AF               GPIO_AF_SPI1

#define sFLASH_SPI_MISO_PIN             GPIO_Pin_6
#define sFLASH_SPI_MISO_GPIO_PORT       GPIOA
#define sFLASH_SPI_MISO_GPIO_CLK        RCC_AHB1Periph_GPIOA
#define sFLASH_SPI_MISO_SOURCE          GPIO_PinSource6
#define sFLASH_SPI_MISO_AF              GPIO_AF_SPI1

#define sFLASH_SPI_MOSI_PIN             GPIO_Pin_7
#define sFLASH_SPI_MOSI_GPIO_PORT       GPIOA
#define sFLASH_SPI_MOSI_GPIO_CLK        RCC_AHB1Periph_GPIOA
#define sFLASH_SPI_MOSI_SOURCE          GPIO_PinSource7
#define sFLASH_SPI_MOSI_AF              GPIO_AF_SPI1

#define sFLASH_CS_PIN                   GPIO_Pin_4
#define sFLASH_CS_GPIO_PORT             GPIOA
#define sFLASH_CS_GPIO_CLK              RCC_AHB1Periph_GPIOA

#define sFLASH_GPIO_CLK_ENR             RCC->AHB1ENR

#define SAME_PINS_PORT //If all SPI pins are on the same port.

/* Select sFLASH: Chip Select pin low */
#define sFLASH_CS_LOW()         sFLASH_CS_GPIO_PORT->BSRRH = sFLASH_CS_PIN;
/* Deselect sFLASH: Chip Select pin high */
#define sFLASH_CS_HIGH()        sFLASH_CS_GPIO_PORT->BSRRL = sFLASH_CS_PIN;

#define sFLASH_SEND_BYTE(x, y)  SPI_I2S_SendData(x, y)

#define sFLASH_RECEIVE_BYTE(x)  SPI_I2S_ReceiveData(x)

#endif /* __SPI_FLASH_CONFIG_H */