297 lines
7.6 KiB
C
297 lines
7.6 KiB
C
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#include "FM25Lx.h"
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#include "rtthread.h"
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#include "stm32f2xx_rcc.h"
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#include <stm32f2xx.h>
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#define FLASH_TRACE(...)
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//#define FLASH_TRACE rt_kprintf
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#define CS_LOW() GPIO_ResetBits(FM25_SPI_NSS_GPIO, FM25_SPI_NSS_PIN)
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#define CS_HIGH() GPIO_SetBits(FM25_SPI_NSS_GPIO, FM25_SPI_NSS_PIN)
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#define spi_config() rt_hw_spi2_baud_rate(SPI_BaudRatePrescaler_4);/* 72M/4=18M */
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#define fram_lock() rt_sem_take(fram_lock, RT_WAITING_FOREVER);
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#define fram_unlock() rt_sem_release(fram_lock);
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static uint32_t spi_timeout_cnt = 0;
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rt_sem_t fram_lock;
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void rt_hw_spi2_baud_rate(uint16_t SPI_BaudRatePrescaler)
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{
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SPI2->CR1 &= ~SPI_BaudRatePrescaler_256;
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SPI2->CR1 |= SPI_BaudRatePrescaler;
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}
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/* FM25L256 using SPI2 */
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void fm25_spi_cfg()
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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SPI_InitTypeDef SPI_InitStructure;
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/* Enable SPI Periph clock */
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RCC_AHB1PeriphClockCmd(FM25_SPI_NSS_GPIO_CLK | FM25_SPI_GPIO_CLK, ENABLE);
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RCC_APB1PeriphClockCmd(FM25_SPI_CLK, ENABLE); //enable SPI clock
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//Setup GPIO
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GPIO_InitStructure.GPIO_Pin = FM25_SPI_SCK | FM25_SPI_MISO | FM25_SPI_MOSI;
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/*Connect Pin to AF*/
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GPIO_PinAFConfig(FM25_SPI_GPIO, GPIO_PinSource3, GPIO_AF_SPI3);
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GPIO_PinAFConfig(FM25_SPI_GPIO, GPIO_PinSource4, GPIO_AF_SPI3);
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GPIO_PinAFConfig(FM25_SPI_GPIO, GPIO_PinSource5, GPIO_AF_SPI3);
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(FM25_SPI_GPIO, &GPIO_InitStructure);
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/* CS pin: PB12 */
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GPIO_InitStructure.GPIO_Pin = FM25_SPI_NSS_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
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GPIO_Init(FM25_SPI_NSS_GPIO, &GPIO_InitStructure);
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CS_HIGH();
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SPI_Cmd(FM25_SPI, DISABLE);
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/*------------------------ SPI configuration ------------------------*/
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SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;//SPI_Direction_1Line_Tx;
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SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
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SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
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SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
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SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
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SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
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SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;/* 72M/64=1.125M */
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SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
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SPI_InitStructure.SPI_CRCPolynomial = 7;
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//SPI_I2S_DeInit(FM25_SPI);
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SPI_Init(FM25_SPI, &SPI_InitStructure);
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/* Enable SPI_MASTER */
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SPI_Cmd(FM25_SPI, ENABLE);
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//SPI_CalculateCRC(FM25_SPI, DISABLE);
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fram_lock = rt_sem_create("framlock", 1, RT_IPC_FLAG_FIFO);
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}
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static uint8_t spi_readwrite(uint8_t data)
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{
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int32_t timeout = 0xFFFFF;
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//rt_kprintf("State 0x%X\n", SPI_I2S_GetFlagStatus(FM25_SPI, SPI_I2S_FLAG_TXE));
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//Wait until the transmit buffer is empty
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while (SPI_I2S_GetFlagStatus(FM25_SPI, SPI_I2S_FLAG_TXE) == RESET && --timeout >0);
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if( timeout <= 0 ){ spi_timeout_cnt++; return 0;}
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// Send the byte
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SPI_I2S_SendData(FM25_SPI, data);
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timeout = 0xFFFFF;
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//Wait until a data is received
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while (SPI_I2S_GetFlagStatus(FM25_SPI, SPI_I2S_FLAG_RXNE) == RESET && --timeout >0);
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if( timeout <= 0 ){ spi_timeout_cnt++; return 0;}
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// Get the received data
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data = SPI_I2S_ReceiveData(FM25_SPI);
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// Return the shifted data
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return data;
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}
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static uint8_t fm25_read_status(void)
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{
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uint8_t tmp;
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CS_LOW();
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spi_readwrite( FM25_RDSR );
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tmp=spi_readwrite(0xFF);
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CS_HIGH();
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return tmp;
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}
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rt_size_t fm25_read(rt_device_t dev, rt_off_t offset, void * buf, rt_size_t size)
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{
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uint32_t index;
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uint8_t *buffer = (uint8_t*) buf;
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fram_lock();
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//spi_config();
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//rt_kprintf("READ: %d, size=%d\n", offset, size);
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CS_LOW();
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spi_readwrite( FM25_READ);
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spi_readwrite( (offset >> 8)&0xFF );
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spi_readwrite( offset & 0xFF );
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for(index=0; index<size; index++)
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{
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*buffer++ = spi_readwrite(0xFF);
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if( spi_timeout_cnt > 0 )
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{
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fram_unlock();
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spi_timeout_cnt = 0;
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rt_kprintf("Read time out\n");
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return -1;
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}
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offset++;
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}
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CS_HIGH();
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fram_unlock();
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return size;
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}
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rt_size_t fm25_write(rt_device_t dev, rt_off_t offset, const void * buf, rt_size_t size)
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{
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uint32_t index = size;
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uint8_t *buffer = (uint8_t*) buf;
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fram_lock();
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//spi_config();
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//rt_kprintf("WRITE: %d, size=%d\n", offset, size);
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CS_LOW();
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spi_readwrite( FM25_WREN );
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CS_HIGH();
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CS_LOW();
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spi_readwrite( FM25_WRITE);
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spi_readwrite( (offset >> 8)&0xFF );
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spi_readwrite( offset & 0xFF );
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while( index > 0 )
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{
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spi_readwrite( *buffer++ );
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if( spi_timeout_cnt > 0 )
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{
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fram_unlock();
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rt_kprintf("Write time out\n");
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spi_timeout_cnt = 0;
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return -1;
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}
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index--;
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offset++;
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}
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CS_HIGH();
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//rt_thread_delay(100);
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fram_unlock();
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return size;
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}
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static rt_err_t fm25_init(rt_device_t dev)
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{
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return RT_EOK;
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}
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static rt_err_t fm25_open(rt_device_t dev, rt_uint16_t oflag)
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{
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char i;
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SPI_Cmd(FM25_SPI, ENABLE);
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if( oflag != RT_DEVICE_FLAG_RDONLY )
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{
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CS_LOW();
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spi_readwrite( FM25_WRSR );
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spi_readwrite( FM25_WPEN );
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CS_HIGH();
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//rt_kprintf("RDSR=0x%X\n", fm25_read_status());
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}
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return RT_EOK;
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}
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static rt_err_t fm25_close(rt_device_t dev)
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{
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CS_LOW();
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spi_readwrite( FM25_WRDI );
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CS_HIGH();
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SPI_Cmd(FM25_SPI, DISABLE);
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return RT_EOK;
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}
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static rt_err_t fm25_control(rt_device_t dev, rt_uint8_t cmd, void *args)
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{
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RT_ASSERT(dev != RT_NULL);
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if (cmd == RT_DEVICE_CTRL_BLK_GETGEOME)
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{
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struct rt_device_blk_geometry *geometry;
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geometry = (struct rt_device_blk_geometry *)args;
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if (geometry == RT_NULL) return -RT_ERROR;
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geometry->bytes_per_sector = 1;
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geometry->block_size = 1;
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geometry->sector_count = 8192;
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}
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return RT_EOK;
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}
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static struct rt_device spi_flash_device;
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void fm25_hw_init()
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{
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int i = 0xFFFFF;
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fm25_spi_cfg();
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while(i--);
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//spi_config();
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CS_LOW();
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spi_readwrite( FM25_WRDI );
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CS_HIGH();
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spi_flash_device.type = RT_Device_Class_Block;
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spi_flash_device.init = fm25_init;
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spi_flash_device.open = fm25_open;
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spi_flash_device.close = fm25_close;
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spi_flash_device.read = fm25_read;
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spi_flash_device.write = fm25_write;
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spi_flash_device.control = fm25_control;
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/* no private */
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spi_flash_device.user_data = RT_NULL;
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rt_device_register(&spi_flash_device, "fram0",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STANDALONE);
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}
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int fram_test(int x)
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{
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//rt_kprintf("SR=0x%X\nCR1=0x%X\nCR2=0x%X\n", FM25_SPI->SR, FM25_SPI->CR1,FM25_SPI->CR2);
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rt_device_t device = RT_NULL;
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char buf[256];
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char read[256];
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int i, j;
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for(i =0; i< 256; i++ )
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{
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buf[i] = i;
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read[i] = 0;
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}
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// step 1:find device
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device = rt_device_find("fram0");
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if( device == RT_NULL)
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{
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rt_kprintf("device %s: not found!\r\n");
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return RT_ERROR;
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}
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device->open(device,RT_DEVICE_FLAG_RDWR);
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for( j = 0; j < FM25_MAXSIZE; j+= 256 )
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//j = 256*x;
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{
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//rt_kprintf("RDSR=0x%X\n", fm25_read_status());
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device->write(device,j, buf,256);
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device->read(device,j, read,256);
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for(i =0; i< 256; i++ )
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{
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if( buf[i] != read[i] )
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rt_kprintf("error at %d: %d!=%d\n", i, buf[i], read[i]);
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}
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}
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device->close(device);
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rt_kprintf("Finsh test\n");
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}
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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FINSH_FUNCTION_EXPORT(fram_test, test system);
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#endif
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