URL
https://opencores.org/ocsvn/neorv32/neorv32/trunk
Subversion Repositories neorv32
Compare Revisions
- This comparison shows the changes necessary to convert path
/neorv32/trunk/sw/bootloader
- from Rev 32 to Rev 33
- ↔ Reverse comparison
Rev 32 → Rev 33
/bootloader.c
1,17 → 1,18
// ################################################################################################# |
// # << NEORV32 - Bootloader >> # |
// # ********************************************************************************************* # |
// # THE BOOTLOADER SHOULD BE COMPILED USING ONLY THE BASE ISA (rv32i or rv32e)! # |
// # In order to run the bootloader on any CPU configuration, the bootloader should be compiled # |
// # unsing the base ISA (rv32i/rv32e) only. # |
// # ********************************************************************************************* # |
// # Boot from (internal) instruction memory, UART or SPI Flash. # |
// # # |
// # UART configuration: 8N1 at 19200 baud # |
// # UART configuration: 8 data bits, no parity bit, 1 stop bit, 19200 baud # |
// # Boot Flash: 8-bit SPI, 24-bit addresses (like Micron N25Q032A) @ neorv32.spi_csn_o(0) # |
// # neorv32.gpio_o(0) is used as high-active status LED (can be disabled via STATUS_LED_EN). # |
// # neorv32.gpio_o(0) is used as high-active status LED (can be disabled via #STATUS_LED_EN). # |
// # # |
// # Auto boot sequence (can be disabled via AUTOBOOT_EN) after timeout (via AUTOBOOT_TIMEOUT): # |
// # Auto boot sequence (can be disabled via #AUTOBOOT_EN) after timeout (via #AUTOBOOT_TIMEOUT): # |
// # -> Try booting from SPI flash at spi_csn_o(0). # |
// # -> Permanently light up status led and freeze if SPI flash booting attempt fails. # |
// # -> Permanently light up status led and stall CPU if SPI flash booting attempt fails. # |
// # ********************************************************************************************* # |
// # BSD 3-Clause License # |
// # # |
48,7 → 49,7
/**********************************************************************//** |
* @file bootloader.c |
* @author Stephan Nolting |
* @brief Default NEORV32 bootloader. Compile only for rv32i or rv32e (better). |
* @brief Default NEORV32 bootloader. |
**************************************************************************/ |
|
// Libraries |
62,21 → 63,21
/**@{*/ |
/** UART BAUD rate */ |
#define BAUD_RATE (19200) |
/** Enable auto-boot sequence if != 0 */ |
#define AUTOBOOT_EN (1) |
/** Time until the auto-boot sequence starts (in seconds) */ |
#define AUTOBOOT_TIMEOUT 8 |
/** Enable auto-boot sequence if != 0 */ |
#define AUTOBOOT_EN (1) |
/** Set to 0 to disable bootloader status LED */ |
#define STATUS_LED_EN (1) |
/** Bootloader status LED at GPIO output port */ |
#define STATUS_LED (0) |
/** SPI flash boot image base address */ |
/** SPI flash boot image base address (warning! address might wrap-around!) */ |
#define SPI_FLASH_BOOT_ADR (0x00800000) |
/** SPI flash chip select at spi_csn_o */ |
/** SPI flash chip select line at spi_csn_o */ |
#define SPI_FLASH_CS (0) |
/** Default SPI flash clock prescaler for serial peripheral interface */ |
/** Default SPI flash clock prescaler */ |
#define SPI_FLASH_CLK_PRSC (CLK_PRSC_8) |
/** SPI flash sector size in bytes */ |
/** SPI flash sector size in bytes (default = 64kb) */ |
#define SPI_FLASH_SECTOR_SIZE (64*1024) |
/**@}*/ |
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