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[sw/bootloader] updated bootloader

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stnolting 2020-10-15 19:15:01 +02:00
parent 963ecbc5a4
commit df7ad1793e
2 changed files with 426 additions and 427 deletions
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828
rtl/core/neorv32_bootloader_image.vhd
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25
sw/bootloader/bootloader.c
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@ -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)
/** Time until the auto-boot sequence starts (in seconds) */
#define AUTOBOOT_TIMEOUT 8
/** Enable auto-boot sequence if != 0 */
#define AUTOBOOT_EN (1)
/** Time until the auto-boot sequence starts (in seconds) */
#define AUTOBOOT_TIMEOUT 8
/** 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)
/**@}*/