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// #################################################################################################
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// #################################################################################################
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// # << NEORV32 - Bootloader >> #
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// # << NEORV32 - Bootloader >> #
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// # ********************************************************************************************* #
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// # ********************************************************************************************* #
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// # THE BOOTLOADER SHOULD BE COMPILED USING THE BASE ISA ONLY (rv32i or rv32e)! #
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// # THE BOOTLOADER SHOULD BE COMPILED USING ONLY THE BASE ISA (rv32i or rv32e)! #
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// # ********************************************************************************************* #
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// # ********************************************************************************************* #
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// # Boot from (internal) instruction memory, UART or SPI Flash. #
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// # Boot from (internal) instruction memory, UART or SPI Flash. #
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// # #
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// # #
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// # UART configuration: 8N1 at 19200 baud #
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// # UART configuration: 8N1 at 19200 baud #
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// # Boot Flash: 8-bit SPI, 24-bit addresses (like Micron N25Q032A) @ neorv32.spi_csn_o(0) #
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// # Boot Flash: 8-bit SPI, 24-bit addresses (like Micron N25Q032A) @ neorv32.spi_csn_o(0) #
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// # neorv32.gpio_o(0) is used as high-active status LED. #
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// # neorv32.gpio_o(0) is used as high-active status LED (can be disabled via STATUS_LED_EN). #
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// # #
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// # #
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// # Auto boot sequence after timeout: #
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// # Auto boot sequence (can be disabled via AUTOBOOT_EN) after timeout (via AUTOBOOT_TIMEOUT): #
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// # -> Try booting from SPI flash at spi_csn_o(0). #
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// # -> Try booting from SPI flash at spi_csn_o(0). #
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// # -> Permanently light up status led and freeze if SPI flash booting attempt fails. #
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// # -> Permanently light up status led and freeze if SPI flash booting attempt fails. #
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// # ********************************************************************************************* #
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// # ********************************************************************************************* #
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// # BSD 3-Clause License #
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// # BSD 3-Clause License #
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// # #
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// # #
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/**@{*/
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/**@{*/
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/** UART BAUD rate */
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/** UART BAUD rate */
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#define BAUD_RATE (19200)
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#define BAUD_RATE (19200)
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/** Time until the auto-boot sequence starts (in seconds) */
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/** Time until the auto-boot sequence starts (in seconds) */
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#define AUTOBOOT_TIMEOUT 8
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#define AUTOBOOT_TIMEOUT 8
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/** Enable auto-boot sequence if != 0 */
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#define AUTOBOOT_EN (1)
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/** Set to 0 to disable bootloader status LED */
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/** Set to 0 to disable bootloader status LED */
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#define STATUS_LED_EN (1)
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#define STATUS_LED_EN (1)
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/** Bootloader status LED at GPIO output port */
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/** Bootloader status LED at GPIO output port */
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#define STATUS_LED (0)
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#define STATUS_LED (0)
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/** SPI flash boot image base address */
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/** SPI flash boot image base address */
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// ------------------------------------------------
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// ------------------------------------------------
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// Auto boot sequence
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// Auto boot sequence
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// ------------------------------------------------
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// ------------------------------------------------
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#if (AUTOBOOT_EN != 0)
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neorv32_uart_print("\n\nAutoboot in "xstr(AUTOBOOT_TIMEOUT)"s. Press key to abort.\n");
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neorv32_uart_print("\n\nAutoboot in "xstr(AUTOBOOT_TIMEOUT)"s. Press key to abort.\n");
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uint64_t timeout_time = neorv32_mtime_get_time() + (uint64_t)(AUTOBOOT_TIMEOUT * clock_speed);
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uint64_t timeout_time = neorv32_mtime_get_time() + (uint64_t)(AUTOBOOT_TIMEOUT * clock_speed);
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while ((UART_DATA & (1 << UART_DATA_AVAIL)) == 0) { // wait for any key to be pressed
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while ((UART_DATA & (1 << UART_DATA_AVAIL)) == 0) { // wait for any key to be pressed
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neorv32_uart_print("\n");
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neorv32_uart_print("\n");
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start_app();
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start_app();
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}
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}
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}
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}
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neorv32_uart_print("Aborted.\n\n");
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neorv32_uart_print("Aborted.\n\n");
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#else
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neorv32_uart_print("\n\n");
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#endif
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print_help();
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print_help();
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// ------------------------------------------------
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// ------------------------------------------------
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// Bootloader console
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// Bootloader console
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print_help();
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print_help();
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}
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}
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else if (c == 'u') { // get executable via UART
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else if (c == 'u') { // get executable via UART
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get_exe(EXE_STREAM_UART);
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get_exe(EXE_STREAM_UART);
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}
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}
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else if (c == 's') { // program EEPROM from RAM
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else if (c == 's') { // program flash from memory (IMEM)
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save_exe();
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save_exe();
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}
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}
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else if (c == 'l') { // get executable from flash
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else if (c == 'l') { // get executable from flash
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get_exe(EXE_STREAM_FLASH);
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get_exe(EXE_STREAM_FLASH);
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}
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}
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