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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
Subversion Repositories openrisc_2011-10-31
[/] [openrisc/] [trunk/] [orpsocv2/] [sw/] [apps/] [spiflash/] [spiflash-program.c] - Rev 393
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// Program that will erase and program an SPI flash #include "or32-utils.h" #include "spr-defs.h" #include "board.h" #include "uart.h" #include "simple-spi.h" #include "printf.h" unsigned long programming_file_start; unsigned long programming_file_end; unsigned long programming_file_length; int spi_master; char slave; // Little program to dump the contents of the SPI flash memory it's connected // to on the board void spi_write_ignore_read(int core, char dat) { spi_core_write_data(core,dat); while (!(spi_core_data_avail(core))); // Wait for the transaction (should // generate a byte) spi_core_read_data(core); } char spi_read_ignore_write(int core) { spi_core_write_data(core, 0x00); while (!(spi_core_data_avail(core))); // Wait for the transaction (should // generate a byte) return spi_core_read_data(core); } unsigned long spi_read_id(int core, char slave_sel) { unsigned long rdid; char* rdid_ptr = (char*) &rdid; int i; spi_core_slave_select(core, slave_sel); // Select slave rdid_ptr[3] = 0; // Send the RDID command spi_write_ignore_read(core,0x9f); // 0x9f is READ ID command // Now we read the next 3 bytes for(i=0;i<3;i++) { rdid_ptr[i] = spi_read_ignore_write(core); } spi_core_slave_select(core, 0); // Deselect slave return rdid; } // Read status regsiter char spi_read_sr(int core, char slave_sel) { char rdsr; spi_core_slave_select(core, slave_sel); // Select slave // Send the RDSR command spi_write_ignore_read(core,0x05); // 0x05 is READ status register command rdsr = spi_read_ignore_write(core); spi_core_slave_select(core, 0); // Deselect slave return rdsr; } void spi_read_block(int core, char slave_sel, unsigned int addr, int num_bytes, char* buf) { int i; spi_core_slave_select(core, slave_sel); // Select slave spi_write_ignore_read(core, 0x3); // READ command spi_write_ignore_read(core,((addr >> 16) & 0xff)); // addres high byte spi_write_ignore_read(core,((addr >> 8) & 0xff)); // addres middle byte spi_write_ignore_read(core,((addr >> 0) & 0xff)); // addres low byte for(i=0;i<num_bytes;i++) buf[i] = spi_read_ignore_write(core); spi_core_slave_select(core, 0); // Deselect slave } void spi_set_write_enable(int core, char slave_sel) { spi_core_slave_select(core, slave_sel); // Select slave spi_write_ignore_read(core,0x06); // 0x06 is to set write enable spi_core_slave_select(core, 0); // Deselect slave } // Write up to 256 bytes of data to a page, always from offset 0 void spi_page_program(int core, char slave_sel, short page_num, int num_bytes, char* buf) { // Set WE latch spi_set_write_enable(core, slave_sel); while(!(spi_read_sr(core, slave_sel) & 0x2)); // Check it's set int i; if (!(num_bytes > 0)) return; if (num_bytes > 256) return; spi_core_slave_select(core, slave_sel); // Select slave spi_write_ignore_read(core, 0x2); // Page program command spi_write_ignore_read(core,((page_num >> 8) & 0xff)); // addres high byte spi_write_ignore_read(core,((page_num >> 0) & 0xff)); // addres middle byte spi_write_ignore_read(core,0); // addres low byte for(i=0;i<num_bytes;i++) spi_write_ignore_read(core, buf[i]); spi_core_slave_select(core, 0); // Deselect slave // Now poll status reg for WIP bit while((spi_read_sr(core, slave_sel) & 0x1)); } // Erase a sector - assumes 128KByte memory, so 4 sectors of 32KBytes each void spi_sector_erase(int core, char slave_sel, unsigned int sector) { // Set WE latch spi_set_write_enable(core, slave_sel); while(!(spi_read_sr(core, slave_sel) & 0x2)); // Check it's set spi_core_slave_select(core, slave_sel); // Select slave spi_write_ignore_read(core, 0xd8); // Sector erase command spi_write_ignore_read(core,(sector>>1)&0x1); // sector select high bit (bit // 16 of addr) spi_write_ignore_read(core,(sector&0x1)<<7); // sector select low bit (bit 15 // of addr) spi_write_ignore_read(core,0); // addres low byte spi_core_slave_select(core, 0); // Deselect slave // Now poll status reg for WIP bit while((spi_read_sr(core, slave_sel) & 0x1)); } // Erase entire device void spi_bulk_erase(int core, char slave_sel) { // Set WE latch spi_set_write_enable(core, slave_sel); while(!(spi_read_sr(core, slave_sel) & 0x2)); // Check it's set spi_core_slave_select(core, slave_sel); // Select slave spi_write_ignore_read(core, 0xc7); // Bulk erase spi_core_slave_select(core, 0); // Deselect slave // Now poll status reg for WIP bit while((spi_read_sr(core, slave_sel) & 0x1)); } extern unsigned long spiprogram_data, _spiprogram_data; extern unsigned long end_spiprogram_data, _end_spiprogram_data; #define printhelp() printf("\nUsage: \n\t[p]rogram\t\twrite program to flash\n\t[v]erify\t\tveryify written program\n\t[s]tatus\t\tprint status of SPI flash\n\n") void print_spi_status(void) { printf("SPI core: %d\n",spi_master); printf("SPI slave select: 0x%x\n",slave&0xff); printf("SPI slave info:\n"); printf("\tID:\t%x\n", spi_read_id(spi_master, slave)); printf("\tSR:\t%x\n", spi_read_sr(spi_master, slave)); printf("\n"); printf("Programming file from 0x%x-0x%x, %d bytes\n",programming_file_start, programming_file_end, programming_file_length); printf("Embedded length: %d\n", (unsigned long) spiprogram_data); } // Verify contents of SPI flash void verify_spi(int core, char slave_sel, char * data, unsigned int length) { unsigned int i; unsigned int page_num = 0; unsigned int bytes_this_page; char verify_buf[256]; int verify_error = 0; printf("* Verifying contents of SPI flash.\n"); while(length) { bytes_this_page = (length >= 256) ? 256 : length; spi_read_block(spi_master, slave, (page_num<<8), bytes_this_page, verify_buf); for(i=0;i<bytes_this_page;i++) { if (verify_buf[i] != data[i]) { printf("* Verify error! Byte %d of page %d - was 0x%x, expected 0x%x\n", i, page_num, verify_buf[i] & 0xff, data[i] & 0xff); verify_error=1; } } data +=256; length -= (length >= 256) ? 256 : length; page_num++; } if (verify_error) printf("* SPI flash verify NOT OK\n"); else printf("* SPI flash verify OK\n"); } // Function to fully erase and program SPI flash void program_spi(int core, char slave_sel, char * data, unsigned int length) { char *program_data_ptr = data; unsigned int program_data_length = length; unsigned int i; unsigned int page_num = 0; unsigned int bytes_this_page; printf("* Erasing SPI flash\n"); spi_bulk_erase(core,slave_sel); printf("* SPI flash erased\n"); while(length) { bytes_this_page = (length >= 256) ? 256 : length; printf("* SPI page %d being programmed with %d bytes", page_num, bytes_this_page); spi_page_program(core, slave_sel, page_num, bytes_this_page, data); printf("\n"); data +=256; length -= (length >= 256) ? 256 : length; page_num++; } printf("* SPI flash programmed\n"); verify_spi(core,slave_sel,program_data_ptr,program_data_length); } int main() { uart_init(0); // init the UART before we can printf volatile char c; int i,j; spi_master = 0; slave = 1; spi_core_slave_select(spi_master, 0); // Deselect slaves // Clear the read FIFO while (spi_core_data_avail(spi_master)) c = spi_core_read_data(spi_master); programming_file_start = (unsigned long) &spiprogram_data; programming_file_end = (unsigned long) &end_spiprogram_data; programming_file_length = programming_file_end - programming_file_start; // SPI core 0, should already be configured to read out data // when we reset. printf("\n\n\tSPI flash programming app\n\n"); while(1){ printf("[p,v,s,h] > "); c = uart_getc(DEFAULT_UART); printf("%c",c); printf("\n"); if (c == 'h') printhelp(); else if (c == 's') print_spi_status(); else if (c == 'p') program_spi(spi_master, slave, (char *) &spiprogram_data, programming_file_length); else if (c == 'v') verify_spi(spi_master, slave, (char *) &spiprogram_data, programming_file_length); } return 0; }
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