| Line 286... |
Line 286... |
#warning Custom boot configuration: Auto boot from external SPI flash.
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#warning Custom boot configuration: Auto boot from external SPI flash.
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// setup UART0 (primary UART, no parity bit, no hardware flow control)
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// setup UART0 (primary UART, no parity bit, no hardware flow control)
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neorv32_uart0_setup(UART_BAUD, PARITY_NONE, FLOW_CONTROL_NONE);
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neorv32_uart0_setup(UART_BAUD, PARITY_NONE, FLOW_CONTROL_NONE);
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// SPI setup
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// SPI setup
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neorv32_spi_setup(SPI_FLASH_CLK_PRSC, 0, 0);
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neorv32_spi_setup(SPI_FLASH_CLK_PRSC, 0, 0, 0);
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PRINT_TEXT("\nNEORV32 bootloader\nLoading from SPI flash at ");
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PRINT_TEXT("\nNEORV32 bootloader\nLoading from SPI flash at ");
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PRINT_XNUM((uint32_t)SPI_BOOT_BASE_ADDR);
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PRINT_XNUM((uint32_t)SPI_BOOT_BASE_ADDR);
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PRINT_TEXT("...\n");
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PRINT_TEXT("...\n");
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| Line 314... |
Line 314... |
// configure trap handler (bare-metal, no neorv32 rte available)
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// configure trap handler (bare-metal, no neorv32 rte available)
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neorv32_cpu_csr_write(CSR_MTVEC, (uint32_t)(&bootloader_trap_handler));
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neorv32_cpu_csr_write(CSR_MTVEC, (uint32_t)(&bootloader_trap_handler));
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#if (SPI_EN != 0)
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#if (SPI_EN != 0)
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// setup SPI for 8-bit, clock-mode 0
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// setup SPI for 8-bit, clock-mode 0
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neorv32_spi_setup(SPI_FLASH_CLK_PRSC, 0, 0);
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neorv32_spi_setup(SPI_FLASH_CLK_PRSC, 0, 0, 0);
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#endif
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#endif
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#if (STATUS_LED_EN != 0)
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#if (STATUS_LED_EN != 0)
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if (neorv32_gpio_available()) {
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if (neorv32_gpio_available()) {
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// activate status LED, clear all others
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// activate status LED, clear all others
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| Line 331... |
Line 331... |
neorv32_uart0_setup(UART_BAUD, PARITY_NONE, FLOW_CONTROL_NONE);
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neorv32_uart0_setup(UART_BAUD, PARITY_NONE, FLOW_CONTROL_NONE);
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#endif
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#endif
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// Configure machine system timer interrupt for ~2Hz
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// Configure machine system timer interrupt for ~2Hz
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if (neorv32_mtime_available()) {
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if (neorv32_mtime_available()) {
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neorv32_mtime_set_timecmp(neorv32_mtime_get_time() + (NEORV32_SYSINFO.CLK/4));
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neorv32_mtime_set_timecmp(neorv32_cpu_get_systime() + (NEORV32_SYSINFO.CLK/4));
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// active timer IRQ
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// active timer IRQ
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neorv32_cpu_csr_write(CSR_MIE, 1 << CSR_MIE_MTIE); // activate MTIME IRQ source only!
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neorv32_cpu_csr_write(CSR_MIE, 1 << CSR_MIE_MTIE); // activate MTIME IRQ source only!
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neorv32_cpu_eint(); // enable global interrupts
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neorv32_cpu_eint(); // enable global interrupts
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}
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}
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| Line 370... |
Line 370... |
#if (SPI_EN != 0)
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#if (SPI_EN != 0)
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#if (AUTO_BOOT_TIMEOUT != 0)
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#if (AUTO_BOOT_TIMEOUT != 0)
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if (neorv32_mtime_available()) {
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if (neorv32_mtime_available()) {
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PRINT_TEXT("\n\nAutoboot in "xstr(AUTO_BOOT_TIMEOUT)"s. Press key to abort.\n");
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PRINT_TEXT("\n\nAutoboot in "xstr(AUTO_BOOT_TIMEOUT)"s. Press key to abort.\n");
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uint64_t timeout_time = neorv32_mtime_get_time() + (uint64_t)(AUTO_BOOT_TIMEOUT * NEORV32_SYSINFO.CLK);
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uint64_t timeout_time = neorv32_cpu_get_systime() + (uint64_t)(AUTO_BOOT_TIMEOUT * NEORV32_SYSINFO.CLK);
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while(1){
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while(1){
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if (neorv32_uart0_available()) { // wait for any key to be pressed
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if (neorv32_uart0_available()) { // wait for any key to be pressed
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if (neorv32_uart0_char_received()) {
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if (neorv32_uart0_char_received()) {
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break;
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break;
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}
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}
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}
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}
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if (neorv32_mtime_get_time() >= timeout_time) { // timeout? start auto boot sequence
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if (neorv32_cpu_get_systime() >= timeout_time) { // timeout? start auto boot sequence
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get_exe(EXE_STREAM_FLASH); // try booting from flash
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get_exe(EXE_STREAM_FLASH); // try booting from flash
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PRINT_TEXT("\n");
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PRINT_TEXT("\n");
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start_app();
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start_app();
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while(1);
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while(1);
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}
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}
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| Line 501... |
Line 501... |
neorv32_gpio_pin_toggle(STATUS_LED_PIN); // toggle status LED
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neorv32_gpio_pin_toggle(STATUS_LED_PIN); // toggle status LED
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}
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}
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#endif
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#endif
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// set time for next IRQ
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// set time for next IRQ
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if (neorv32_mtime_available()) {
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if (neorv32_mtime_available()) {
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neorv32_mtime_set_timecmp(neorv32_mtime_get_time() + (NEORV32_SYSINFO.CLK/4));
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neorv32_mtime_set_timecmp(neorv32_cpu_get_systime() + (NEORV32_SYSINFO.CLK/4));
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}
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}
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}
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}
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// Bus store access error during get_exe
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// Bus store access error during get_exe
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else if ((cause == TRAP_CODE_S_ACCESS) && (getting_exe)) {
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else if ((cause == TRAP_CODE_S_ACCESS) && (getting_exe)) {
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