Zoltan Hudak / Mbed 2 deprecated STM32F407VET6_SPIFlash

Using SPI flash with STM32F407VET6 board.

Dependencies:   SpiFlash25 flash-fs mbed

Fork of Dragonfly_Filesystem_Example by MultiTech

Using the on-board Winbond W25Q16 16Mbit SPI Flash memory chip with STM32F407VET6 black boards

main.cpp@0:a802928f26b6, 2014-12-29 (annotated)

Committer:
mfiore
Date:
Mon Dec 29 15:52:43 2014 +0000
Revision:
0:a802928f26b6
Child:
5:c0f6a3babedf
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mfiore 0:a802928f26b6 1 #include "mbed.h"
mfiore 0:a802928f26b6 2 #include "SpiFlash25.h"
mfiore 0:a802928f26b6 3 #include "spiffs.h"
mfiore 0:a802928f26b6 4 #include <string>
mfiore 0:a802928f26b6 5
mfiore 0:a802928f26b6 6 // this value represents the number of files you can have open at the same time
mfiore 0:a802928f26b6 7 // adjust it according to your requirements
mfiore 0:a802928f26b6 8 #define MAX_CONCURRENT_FDS 4
mfiore 0:a802928f26b6 9
mfiore 0:a802928f26b6 10 #define PAGE_SIZE 256
mfiore 0:a802928f26b6 11 #define SECTOR_SIZE 64*1024
mfiore 0:a802928f26b6 12 #define MEM_SIZE 2*1024*1024
mfiore 0:a802928f26b6 13
mfiore 0:a802928f26b6 14 static u8_t spiffs_work_buf[PAGE_SIZE * 2];
mfiore 0:a802928f26b6 15 static u8_t spiffs_fds[32 * MAX_CONCURRENT_FDS];
mfiore 0:a802928f26b6 16 static u8_t spiffs_cache_buf[(PAGE_SIZE + 32) * 4];
mfiore 0:a802928f26b6 17
mfiore 0:a802928f26b6 18 static SpiFlash25 flash(SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS1);
mfiore 0:a802928f26b6 19 static spiffs fs;
mfiore 0:a802928f26b6 20 static spiffs_config cfg;
mfiore 0:a802928f26b6 21
mfiore 0:a802928f26b6 22 // glue code between SPI driver and filesystem
mfiore 0:a802928f26b6 23 int spi_read(unsigned int addr, unsigned int size, unsigned char* data) {
mfiore 0:a802928f26b6 24 if (flash.read(addr, size, (char*)data))
mfiore 0:a802928f26b6 25 return SPIFFS_OK;
mfiore 0:a802928f26b6 26 return -1;
mfiore 0:a802928f26b6 27 }
mfiore 0:a802928f26b6 28 int spi_write(unsigned int addr, unsigned int size, unsigned char* data) {
mfiore 0:a802928f26b6 29 if (flash.write(addr, size, (const char*)data))
mfiore 0:a802928f26b6 30 return SPIFFS_OK;
mfiore 0:a802928f26b6 31 return -1;
mfiore 0:a802928f26b6 32 }
mfiore 0:a802928f26b6 33 int spi_erase(unsigned int addr, unsigned int size) {
mfiore 0:a802928f26b6 34 flash.clear_sector(addr);
mfiore 0:a802928f26b6 35 return SPIFFS_OK;
mfiore 0:a802928f26b6 36 }
mfiore 0:a802928f26b6 37
mfiore 0:a802928f26b6 38 int main(void) {
mfiore 0:a802928f26b6 39 int ret;
mfiore 0:a802928f26b6 40 int handle;
mfiore 0:a802928f26b6 41 char data[256];
mfiore 0:a802928f26b6 42 char msg[] = "Hello World! The sneaky cat crept around the sleeping dog.\r\n";
mfiore 0:a802928f26b6 43 char file[] = "test.txt";
mfiore 0:a802928f26b6 44 string sdata;
mfiore 0:a802928f26b6 45
mfiore 0:a802928f26b6 46 // configure the filesystem
mfiore 0:a802928f26b6 47 cfg.phys_size = MEM_SIZE;
mfiore 0:a802928f26b6 48 cfg.phys_addr = 0;
mfiore 0:a802928f26b6 49 cfg.phys_erase_block = SECTOR_SIZE;
mfiore 0:a802928f26b6 50 cfg.log_block_size = SECTOR_SIZE;
mfiore 0:a802928f26b6 51 cfg.log_page_size = PAGE_SIZE;
mfiore 0:a802928f26b6 52
mfiore 0:a802928f26b6 53 cfg.hal_read_f = &spi_read;
mfiore 0:a802928f26b6 54 cfg.hal_write_f = &spi_write;
mfiore 0:a802928f26b6 55 cfg.hal_erase_f = &spi_erase;
mfiore 0:a802928f26b6 56
mfiore 0:a802928f26b6 57 Serial pc(USBTX, USBRX);
mfiore 0:a802928f26b6 58 pc.baud(115200);
mfiore 0:a802928f26b6 59
mfiore 0:a802928f26b6 60 printf("dragonfly spi flash example started\r\n");
mfiore 0:a802928f26b6 61
mfiore 0:a802928f26b6 62 // erase entire flash
mfiore 0:a802928f26b6 63 // THIS WILL ERASE THE ENTIRE FLASH! EVERYTHING ON IT WILL BE LOST AND CANNOT BE RECOVERED!
mfiore 0:a802928f26b6 64 //flash.clear_mem();
mfiore 0:a802928f26b6 65
mfiore 0:a802928f26b6 66 // mount the filesystem
mfiore 0:a802928f26b6 67 ret = SPIFFS_mount(&fs, &cfg, spiffs_work_buf, spiffs_fds, sizeof(spiffs_fds), spiffs_cache_buf, sizeof(spiffs_cache_buf), NULL);
mfiore 0:a802928f26b6 68 if (ret) {
mfiore 0:a802928f26b6 69 printf("SPIFFS_mount failed %d - can't continue\r\n", ret);
mfiore 0:a802928f26b6 70 return 1;
mfiore 0:a802928f26b6 71 }
mfiore 0:a802928f26b6 72
mfiore 0:a802928f26b6 73 // write to the file
mfiore 0:a802928f26b6 74 handle = SPIFFS_open(&fs, file, SPIFFS_CREAT | SPIFFS_RDWR | SPIFFS_APPEND, 0);
mfiore 0:a802928f26b6 75 if (handle < 0)
mfiore 0:a802928f26b6 76 printf("SPIFFS_open failed %d\r\n", SPIFFS_errno(&fs));
mfiore 0:a802928f26b6 77
mfiore 0:a802928f26b6 78 if (handle) {
mfiore 0:a802928f26b6 79 ret = SPIFFS_write(&fs, handle, msg, sizeof(msg));
mfiore 0:a802928f26b6 80 if (ret < 0)
mfiore 0:a802928f26b6 81 printf("SPIFFS_write failed %d\r\n", SPIFFS_errno(&fs));
mfiore 0:a802928f26b6 82 else
mfiore 0:a802928f26b6 83 printf("wrote %d bytes\r\n", ret);
mfiore 0:a802928f26b6 84 SPIFFS_close(&fs, handle);
mfiore 0:a802928f26b6 85 }
mfiore 0:a802928f26b6 86
mfiore 0:a802928f26b6 87 // read the current file contents
mfiore 0:a802928f26b6 88 spiffs_stat stat;
mfiore 0:a802928f26b6 89 memset(&stat, 0, sizeof(stat));
mfiore 0:a802928f26b6 90 ret = SPIFFS_stat(&fs, file, &stat);
mfiore 0:a802928f26b6 91 if (ret)
mfiore 0:a802928f26b6 92 printf("SPIFFS_stat failed %d\r\n", SPIFFS_errno(&fs));
mfiore 0:a802928f26b6 93 else
mfiore 0:a802928f26b6 94 printf("file size: %d bytes\r\n", stat.size);
mfiore 0:a802928f26b6 95
mfiore 0:a802928f26b6 96 handle = SPIFFS_open(&fs, file, SPIFFS_RDWR, 0);
mfiore 0:a802928f26b6 97 if (handle < 0)
mfiore 0:a802928f26b6 98 printf("SPIFFS_open failed %d\r\n", SPIFFS_errno(&fs));
mfiore 0:a802928f26b6 99
mfiore 0:a802928f26b6 100 if (handle) {
mfiore 0:a802928f26b6 101 while (sdata.size() < stat.size) {
mfiore 0:a802928f26b6 102 ret = SPIFFS_read(&fs, handle, data, stat.size - sdata.size() < sizeof(data) ? stat.size - sdata.size() : sizeof(data));
mfiore 0:a802928f26b6 103 if (ret < 0) {
mfiore 0:a802928f26b6 104 printf("SPIFFS_read failed %d\r\n", SPIFFS_errno(&fs));
mfiore 0:a802928f26b6 105 continue;
mfiore 0:a802928f26b6 106 }
mfiore 0:a802928f26b6 107 printf("read %d bytes\r\n", ret);
mfiore 0:a802928f26b6 108 sdata.append(data, ret);
mfiore 0:a802928f26b6 109 }
mfiore 0:a802928f26b6 110
mfiore 0:a802928f26b6 111 printf("data [\r\n");
mfiore 0:a802928f26b6 112 for (int i = 0; i < sdata.size(); i++)
mfiore 0:a802928f26b6 113 printf("%c", sdata[i]);
mfiore 0:a802928f26b6 114 printf("\r\n]\r\n");
mfiore 0:a802928f26b6 115
mfiore 0:a802928f26b6 116 SPIFFS_close(&fs, handle);
mfiore 0:a802928f26b6 117 }
mfiore 0:a802928f26b6 118
mfiore 0:a802928f26b6 119 printf("dragonfly spi flash example finished\r\n\r\n");
mfiore 0:a802928f26b6 120
mfiore 0:a802928f26b6 121 return 0;
mfiore 0:a802928f26b6 122 }