/// \function freq([sys_freq]) /// /// If given no arguments, returns a tuple of clock frequencies: /// (SYSCLK, HCLK, PCLK1, PCLK2). /// /// If given an argument, sets the system frequency to that value in Hz. /// Eg freq(120000000) gives 120MHz. Note that not all values are /// supported and the largest supported frequency not greater than /// the given sys_freq will be selected. STATIC mp_obj_t pyb_freq(mp_uint_t n_args, const mp_obj_t *args) { if (n_args == 0) { // get mp_obj_t tuple[4] = { mp_obj_new_int(HAL_RCC_GetSysClockFreq()), mp_obj_new_int(HAL_RCC_GetHCLKFreq()), mp_obj_new_int(HAL_RCC_GetPCLK1Freq()), mp_obj_new_int(HAL_RCC_GetPCLK2Freq()), }; return mp_obj_new_tuple(4, tuple); } else { // set mp_int_t wanted_sysclk = mp_obj_get_int(args[0]) / 1000000; // default PLL parameters that give 48MHz on PLL48CK uint32_t m = HSE_VALUE / 1000000, n = 336, p = 2, q = 7; uint32_t sysclk_source; // the following logic assumes HSE < HSI if (HSE_VALUE / 1000000 <= wanted_sysclk && wanted_sysclk < HSI_VALUE / 1000000) { // use HSE as SYSCLK sysclk_source = RCC_SYSCLKSOURCE_HSE; } else if (HSI_VALUE / 1000000 <= wanted_sysclk && wanted_sysclk < 24) { // use HSI as SYSCLK sysclk_source = RCC_SYSCLKSOURCE_HSI; } else { // search for a valid PLL configuration that keeps USB at 48MHz for (; wanted_sysclk > 0; wanted_sysclk--) { for (p = 2; p <= 8; p += 2) { // compute VCO_OUT mp_uint_t vco_out = wanted_sysclk * p; // make sure VCO_OUT is between 192MHz and 432MHz if (vco_out < 192 || vco_out > 432) { continue; } // make sure Q is an integer if (vco_out % 48 != 0) { continue; } // solve for Q to get PLL48CK at 48MHz q = vco_out / 48; // make sure Q is in range if (q < 2 || q > 15) { continue; } // make sure N/M is an integer if (vco_out % (HSE_VALUE / 1000000) != 0) { continue; } // solve for N/M mp_uint_t n_by_m = vco_out / (HSE_VALUE / 1000000); // solve for M, making sure VCO_IN (=HSE/M) is between 1MHz and 2MHz m = 192 / n_by_m; while (m < (HSE_VALUE / 2000000) || n_by_m * m < 192) { m += 1; } if (m > (HSE_VALUE / 1000000)) { continue; } // solve for N n = n_by_m * m; // make sure N is in range if (n < 192 || n > 432) { continue; } // found values! sysclk_source = RCC_SYSCLKSOURCE_PLLCLK; goto set_clk; } } nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "can't make valid freq")); } set_clk: //printf("%lu %lu %lu %lu %lu\n", sysclk_source, m, n, p, q); // let the USB CDC have a chance to process before we change the clock HAL_Delay(USBD_CDC_POLLING_INTERVAL + 2); // desired system clock source is in sysclk_source RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); if (sysclk_source == RCC_SYSCLKSOURCE_PLLCLK) { // set HSE as system clock source to allow modification of the PLL configuration // we then change to PLL after re-configuring PLL RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSE; } else { // directly set the system clock source as desired RCC_ClkInitStruct.SYSCLKSource = sysclk_source; } RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { goto fail; } // re-configure PLL // even if we don't use the PLL for the system clock, we still need it for USB, RNG and SDIO RCC_OscInitTypeDef RCC_OscInitStruct; RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = m; RCC_OscInitStruct.PLL.PLLN = n; RCC_OscInitStruct.PLL.PLLP = p; RCC_OscInitStruct.PLL.PLLQ = q; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { goto fail; } // set PLL as system clock source if wanted if (sysclk_source == RCC_SYSCLKSOURCE_PLLCLK) { RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { goto fail; } } // re-init TIM3 for USB CDC rate timer_tim3_init(); return mp_const_none; fail:; void NORETURN __fatal_error(const char *msg); __fatal_error("can't change freq"); } }
int main(void) { // Stack limit should be less than real stack size, so we // had chance to recover from limit hit. mp_stack_set_limit((char*)&_ram_end - (char*)&_heap_end - 1024); /* STM32F4xx HAL library initialization: - Configure the Flash prefetch, instruction and Data caches - Configure the Systick to generate an interrupt each 1 msec - Set NVIC Group Priority to 4 - Global MSP (MCU Support Package) initialization */ HAL_Init(); // basic sub-system init pendsv_init(); timer_tim3_init(); led_init(); soft_reset: // check if user switch held to select the reset mode led_state(LED_RED, 1); led_state(LED_GREEN, 1); led_state(LED_BLUE, 1); #if MICROPY_HW_ENABLE_RTC rtc_init(); #endif // GC init gc_init(&_heap_start, &_heap_end); // Micro Python init mp_init(); mp_obj_list_init(mp_sys_path, 0); mp_obj_list_init(mp_sys_argv, 0); readline_init0(); pin_init0(); extint_init0(); timer_init0(); rng_init0(); i2c_init0(); spi_init0(); uart_init0(); pyb_usb_init0(); usbdbg_init(); if (sensor_init() != 0) { __fatal_error("Failed to init sensor"); } /* Export functions to the global python namespace */ mp_store_global(qstr_from_str("randint"), (mp_obj_t)&py_randint_obj); mp_store_global(qstr_from_str("cpu_freq"), (mp_obj_t)&py_cpu_freq_obj); mp_store_global(qstr_from_str("Image"), (mp_obj_t)&py_image_load_image_obj); mp_store_global(qstr_from_str("HaarCascade"), (mp_obj_t)&py_image_load_cascade_obj); mp_store_global(qstr_from_str("FreakDesc"), (mp_obj_t)&py_image_load_descriptor_obj); mp_store_global(qstr_from_str("FreakDescSave"), (mp_obj_t)&py_image_save_descriptor_obj); mp_store_global(qstr_from_str("LBPDesc"), (mp_obj_t)&py_image_load_lbp_obj); mp_store_global(qstr_from_str("vcp_is_connected"), (mp_obj_t)&py_vcp_is_connected_obj); if (sdcard_is_present()) { sdcard_init(); FRESULT res = f_mount(&fatfs, "1:", 1); if (res != FR_OK) { __fatal_error("could not mount SD\n"); } // Set CWD and USB medium to SD f_chdrive("1:"); pyb_usb_storage_medium = PYB_USB_STORAGE_MEDIUM_SDCARD; } else { storage_init(); // try to mount the flash FRESULT res = f_mount(&fatfs, "0:", 1); if (res == FR_NO_FILESYSTEM) { // create a fresh fs make_flash_fs(); } else if (res != FR_OK) { __fatal_error("could not access LFS\n"); } // Set CWD and USB medium to flash f_chdrive("0:"); pyb_usb_storage_medium = PYB_USB_STORAGE_MEDIUM_FLASH; } // turn boot-up LEDs off led_state(LED_RED, 0); led_state(LED_GREEN, 0); led_state(LED_BLUE, 0); // init USB device to default setting if it was not already configured if (!(pyb_usb_flags & PYB_USB_FLAG_USB_MODE_CALLED)) { pyb_usb_dev_init(USBD_VID, USBD_PID_CDC_MSC, USBD_MODE_CDC_MSC, NULL); } // Run the main script from the current directory. FRESULT res = f_stat("main.py", NULL); if (res == FR_OK) { if (!pyexec_file("main.py")) { nlr_buf_t nlr; if (nlr_push(&nlr) == 0) { flash_error(3); nlr_pop(); } } } // Enter REPL nlr_buf_t nlr; for (;;) { if (nlr_push(&nlr) == 0) { while (usbdbg_script_ready()) { nlr_buf_t nlr; vstr_t *script_buf = usbdbg_get_script(); // clear script flag usbdbg_clr_script(); // execute the script if (nlr_push(&nlr) == 0) { pyexec_push_scope(); // parse and compile script mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(script_buf), vstr_len(script_buf), 0); mp_parse_node_t pn = mp_parse(lex, MP_PARSE_FILE_INPUT); mp_obj_t script = mp_compile(pn, lex->source_name, MP_EMIT_OPT_NONE, false); // execute the script mp_call_function_0(script); nlr_pop(); } else { mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val); } pyexec_pop_scope(); } // clear script flag usbdbg_clr_script(); // no script run REPL pyexec_friendly_repl(); nlr_pop(); } } printf("PYB: sync filesystems\n"); storage_flush(); printf("PYB: soft reboot\n"); goto soft_reset; }
int main(void) { FRESULT f_res; int sensor_init_ret; // Stack limit should be less than real stack size, so we // had chance to recover from limit hit. mp_stack_set_limit((char*)&_ram_end - (char*)&_heap_end - 1024); /* STM32F4xx HAL library initialization: - Configure the Flash prefetch, instruction and Data caches - Configure the Systick to generate an interrupt each 1 msec - Set NVIC Group Priority to 4 - Global MSP (MCU Support Package) initialization */ HAL_Init(); // basic sub-system init pendsv_init(); timer_tim3_init(); led_init(); soft_reset: // check if user switch held to select the reset mode led_state(LED_RED, 1); led_state(LED_GREEN, 1); led_state(LED_BLUE, 1); #if MICROPY_HW_ENABLE_RTC rtc_init(); #endif // GC init gc_init(&_heap_start, &_heap_end); // Micro Python init mp_init(); mp_obj_list_init(mp_sys_path, 0); mp_obj_list_init(mp_sys_argv, 0); readline_init0(); pin_init0(); extint_init0(); timer_init0(); rng_init0(); i2c_init0(); spi_init0(); uart_init0(); pyb_usb_init0(); usbdbg_init(); sensor_init_ret = sensor_init(); /* Export functions to the global python namespace */ mp_store_global(qstr_from_str("randint"), (mp_obj_t)&py_randint_obj); mp_store_global(qstr_from_str("cpu_freq"), (mp_obj_t)&py_cpu_freq_obj); mp_store_global(qstr_from_str("vcp_is_connected"), (mp_obj_t)&py_vcp_is_connected_obj); if (sdcard_is_present()) { sdcard_init(); FRESULT res = f_mount(&fatfs, "1:", 1); if (res != FR_OK) { __fatal_error("could not mount SD\n"); } // Set CWD and USB medium to SD f_chdrive("1:"); pyb_usb_storage_medium = PYB_USB_STORAGE_MEDIUM_SDCARD; } else { storage_init(); // try to mount the flash FRESULT res = f_mount(&fatfs, "0:", 1); if (res == FR_NO_FILESYSTEM) { // create a fresh fs make_flash_fs(); } else if (res != FR_OK) { __fatal_error("could not access LFS\n"); } // Set CWD and USB medium to flash f_chdrive("0:"); pyb_usb_storage_medium = PYB_USB_STORAGE_MEDIUM_FLASH; } // turn boot-up LEDs off led_state(LED_RED, 0); led_state(LED_GREEN, 0); led_state(LED_BLUE, 0); // init USB device to default setting if it was not already configured if (!(pyb_usb_flags & PYB_USB_FLAG_USB_MODE_CALLED)) { pyb_usb_dev_init(USBD_VID, USBD_PID_CDC_MSC, USBD_MODE_CDC_MSC, NULL); } // check sensor init result if (sensor_init_ret != 0) { char buf[512]; snprintf(buf, sizeof(buf), "Failed to init sensor, error:%d", sensor_init_ret); __fatal_error(buf); } // Run self tests the first time only f_res = f_stat("selftest.py", NULL); if (f_res == FR_OK) { nlr_buf_t nlr; if (nlr_push(&nlr) == 0) { // Parse, compile and execute the self-tests script. pyexec_file("selftest.py"); nlr_pop(); } else { // Get the exception message. TODO: might be a hack. mp_obj_str_t *str = mp_obj_exception_get_value((mp_obj_t)nlr.ret_val); // If any of the self-tests fail log the exception message // and loop forever. Note: IDE exceptions will not be caught. __fatal_error((const char*) str->data); } // Success: remove self tests script and flush cache f_unlink("selftest.py"); storage_flush(); } // Run the main script from the current directory. f_res = f_stat("main.py", NULL); if (f_res == FR_OK) { nlr_buf_t nlr; if (nlr_push(&nlr) == 0) { // Parse, compile and execute the main script. pyexec_file("main.py"); nlr_pop(); } else { mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val); if (nlr_push(&nlr) == 0) { flash_error(3); nlr_pop(); }// if this gets interrupted again ignore it. } } // Enter REPL nlr_buf_t nlr; for (;;) { if (nlr_push(&nlr) == 0) { while (usbdbg_script_ready()) { nlr_buf_t nlr; vstr_t *script_buf = usbdbg_get_script(); // clear debugging flags usbdbg_clear_flags(); // re-init MP mp_uint_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION(); mp_init(); MICROPY_END_ATOMIC_SECTION(atomic_state); // execute the script if (nlr_push(&nlr) == 0) { // parse, compile and execute script pyexec_str(script_buf); nlr_pop(); } else { mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val); } } // clear debugging flags usbdbg_clear_flags(); // re-init MP mp_uint_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION(); mp_init(); MICROPY_END_ATOMIC_SECTION(atomic_state); // no script run REPL pyexec_friendly_repl(); nlr_pop(); } } printf("PYB: sync filesystems\n"); storage_flush(); printf("PYB: soft reboot\n"); goto soft_reset; }
int main(void) { // TODO disable JTAG /* STM32F4xx HAL library initialization: - Configure the Flash prefetch, instruction and Data caches - Configure the Systick to generate an interrupt each 1 msec - Set NVIC Group Priority to 4 - Global MSP (MCU Support Package) initialization */ HAL_Init(); // set the system clock to be HSE SystemClock_Config(); // enable GPIO clocks __GPIOA_CLK_ENABLE(); __GPIOB_CLK_ENABLE(); __GPIOC_CLK_ENABLE(); __GPIOD_CLK_ENABLE(); // enable the CCM RAM __CCMDATARAMEN_CLK_ENABLE(); #if 0 #if defined(NETDUINO_PLUS_2) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; #if MICROPY_HW_HAS_SDCARD // Turn on the power enable for the sdcard (PB1) GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_WriteBit(GPIOB, GPIO_Pin_1, Bit_SET); #endif // Turn on the power for the 5V on the expansion header (PB2) GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_WriteBit(GPIOB, GPIO_Pin_2, Bit_SET); } #endif #endif // basic sub-system init pendsv_init(); timer_tim3_init(); led_init(); switch_init0(); int first_soft_reset = true; soft_reset: // check if user switch held to select the reset mode led_state(1, 0); led_state(2, 1); led_state(3, 0); led_state(4, 0); uint reset_mode = 1; #if MICROPY_HW_HAS_SWITCH if (switch_get()) { for (uint i = 0; i < 3000; i++) { if (!switch_get()) { break; } HAL_Delay(20); if (i % 30 == 29) { if (++reset_mode > 3) { reset_mode = 1; } led_state(2, reset_mode & 1); led_state(3, reset_mode & 2); led_state(4, reset_mode & 4); } } // flash the selected reset mode for (uint i = 0; i < 6; i++) { led_state(2, 0); led_state(3, 0); led_state(4, 0); HAL_Delay(50); led_state(2, reset_mode & 1); led_state(3, reset_mode & 2); led_state(4, reset_mode & 4); HAL_Delay(50); } HAL_Delay(400); } #endif #if MICROPY_HW_ENABLE_RTC if (first_soft_reset) { rtc_init(); } #endif // more sub-system init #if MICROPY_HW_HAS_SDCARD if (first_soft_reset) { sdcard_init(); } #endif if (first_soft_reset) { storage_init(); } // GC init gc_init(&_heap_start, &_heap_end); // Change #if 0 to #if 1 if you want REPL on USART_6 (or another usart) // as well as on USB VCP #if 0 pyb_usart_global_debug = pyb_Usart(MP_OBJ_NEW_SMALL_INT(PYB_USART_YA), MP_OBJ_NEW_SMALL_INT(115200)); #else pyb_usart_global_debug = NULL; #endif // Micro Python init qstr_init(); mp_init(); mp_obj_list_init(mp_sys_path, 0); mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_0_colon__slash_)); mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_0_colon__slash_lib)); mp_obj_list_init(mp_sys_argv, 0); readline_init(); exti_init(); #if MICROPY_HW_HAS_SWITCH // must come after exti_init switch_init(); #endif #if MICROPY_HW_HAS_LCD // LCD init (just creates class, init hardware by calling LCD()) lcd_init(); #endif pin_map_init(); // local filesystem init { // try to mount the flash FRESULT res = f_mount(&fatfs0, "0:", 1); if (reset_mode == 3 || res == FR_NO_FILESYSTEM) { // no filesystem, or asked to reset it, so create a fresh one // LED on to indicate creation of LFS led_state(PYB_LED_R2, 1); uint32_t start_tick = HAL_GetTick(); res = f_mkfs("0:", 0, 0); if (res == FR_OK) { // success creating fresh LFS } else { __fatal_error("could not create LFS"); } // create empty main.py FIL fp; f_open(&fp, "0:/main.py", FA_WRITE | FA_CREATE_ALWAYS); UINT n; f_write(&fp, fresh_main_py, sizeof(fresh_main_py) - 1 /* don't count null terminator */, &n); // TODO check we could write n bytes f_close(&fp); // create .inf driver file f_open(&fp, "0:/pybcdc.inf", FA_WRITE | FA_CREATE_ALWAYS); f_write(&fp, fresh_pybcdc_inf, sizeof(fresh_pybcdc_inf) - 1 /* don't count null terminator */, &n); f_close(&fp); // keep LED on for at least 200ms sys_tick_wait_at_least(start_tick, 200); led_state(PYB_LED_R2, 0); } else if (res == FR_OK) { // mount sucessful } else { __fatal_error("could not access LFS"); } } // make sure we have a 0:/boot.py { FILINFO fno; #if _USE_LFN fno.lfname = NULL; fno.lfsize = 0; #endif FRESULT res = f_stat("0:/boot.py", &fno); if (res == FR_OK) { if (fno.fattrib & AM_DIR) { // exists as a directory // TODO handle this case // see http://elm-chan.org/fsw/ff/img/app2.c for a "rm -rf" implementation } else { // exists as a file, good! } } else { // doesn't exist, create fresh file // LED on to indicate creation of boot.py led_state(PYB_LED_R2, 1); uint32_t start_tick = HAL_GetTick(); FIL fp; f_open(&fp, "0:/boot.py", FA_WRITE | FA_CREATE_ALWAYS); UINT n; f_write(&fp, fresh_boot_py, sizeof(fresh_boot_py) - 1 /* don't count null terminator */, &n); // TODO check we could write n bytes f_close(&fp); // keep LED on for at least 200ms sys_tick_wait_at_least(start_tick, 200); led_state(PYB_LED_R2, 0); } } // root device defaults to internal flash filesystem uint root_device = 0; #if defined(USE_DEVICE_MODE) usb_storage_medium_t usb_medium = USB_STORAGE_MEDIUM_FLASH; #endif #if MICROPY_HW_HAS_SDCARD // if an SD card is present then mount it on 1:/ if (reset_mode == 1 && sdcard_is_present()) { FRESULT res = f_mount(&fatfs1, "1:", 1); if (res != FR_OK) { printf("[SD] could not mount SD card\n"); } else { // use SD card as root device root_device = 1; if (first_soft_reset) { // use SD card as medium for the USB MSD #if defined(USE_DEVICE_MODE) usb_medium = USB_STORAGE_MEDIUM_SDCARD; #endif } } } #else // Get rid of compiler warning if no SDCARD is configured. (void)first_soft_reset; #endif // run <root>:/boot.py, if it exists if (reset_mode == 1) { const char *boot_file; if (root_device == 0) { boot_file = "0:/boot.py"; } else { boot_file = "1:/boot.py"; } FRESULT res = f_stat(boot_file, NULL); if (res == FR_OK) { if (!pyexec_file(boot_file)) { flash_error(4); } } } // turn boot-up LEDs off led_state(2, 0); led_state(3, 0); led_state(4, 0); #if defined(USE_HOST_MODE) // USB host pyb_usb_host_init(); #elif defined(USE_DEVICE_MODE) // USB device if (reset_mode == 1) { usb_device_mode_t usb_mode = USB_DEVICE_MODE_CDC_MSC; if (pyb_config_usb_mode != MP_OBJ_NULL) { if (strcmp(mp_obj_str_get_str(pyb_config_usb_mode), "CDC+HID") == 0) { usb_mode = USB_DEVICE_MODE_CDC_HID; } } pyb_usb_dev_init(usb_mode, usb_medium); } else { pyb_usb_dev_init(USB_DEVICE_MODE_CDC_MSC, usb_medium); } #endif #if MICROPY_HW_ENABLE_RNG // RNG rng_init(); #endif #if MICROPY_HW_ENABLE_TIMER // timer //timer_init(); #endif // I2C i2c_init(); #if MICROPY_HW_HAS_MMA7660 // MMA accel: init and reset accel_init(); #endif #if MICROPY_HW_ENABLE_SERVO // servo servo_init(); #endif #if MICROPY_HW_ENABLE_DAC // DAC dac_init(); #endif // now that everything is initialised, run main script if (reset_mode == 1 && pyexec_mode_kind == PYEXEC_MODE_FRIENDLY_REPL) { vstr_t *vstr = vstr_new(); vstr_printf(vstr, "%d:/", root_device); if (pyb_config_main == MP_OBJ_NULL) { vstr_add_str(vstr, "main.py"); } else { vstr_add_str(vstr, mp_obj_str_get_str(pyb_config_main)); } FRESULT res = f_stat(vstr_str(vstr), NULL); if (res == FR_OK) { if (!pyexec_file(vstr_str(vstr))) { flash_error(3); } } vstr_free(vstr); } #if 0 #if MICROPY_HW_HAS_WLAN // wifi pyb_wlan_init(); pyb_wlan_start(); #endif #endif // enter REPL // REPL mode can change, or it can request a soft reset for (;;) { if (pyexec_mode_kind == PYEXEC_MODE_RAW_REPL) { if (pyexec_raw_repl() != 0) { break; } } else { if (pyexec_friendly_repl() != 0) { break; } } } printf("PYB: sync filesystems\n"); storage_flush(); printf("PYB: soft reboot\n"); first_soft_reset = false; goto soft_reset; }
int main(void) { // TODO disable JTAG // Stack limit should be less than real stack size, so we have a chance // to recover from limit hit. (Limit is measured in bytes.) mp_stack_set_limit((char*)&_ram_end - (char*)&_heap_end - 1024); /* STM32F4xx HAL library initialization: - Configure the Flash prefetch, instruction and Data caches - Configure the Systick to generate an interrupt each 1 msec - Set NVIC Group Priority to 4 - Global MSP (MCU Support Package) initialization */ HAL_Init(); // set the system clock to be HSE SystemClock_Config(); // enable GPIO clocks __GPIOA_CLK_ENABLE(); __GPIOB_CLK_ENABLE(); __GPIOC_CLK_ENABLE(); __GPIOD_CLK_ENABLE(); // enable the CCM RAM __CCMDATARAMEN_CLK_ENABLE(); #if 0 #if defined(NETDUINO_PLUS_2) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; #if MICROPY_HW_HAS_SDCARD // Turn on the power enable for the sdcard (PB1) GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_WriteBit(GPIOB, GPIO_Pin_1, Bit_SET); #endif // Turn on the power for the 5V on the expansion header (PB2) GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_WriteBit(GPIOB, GPIO_Pin_2, Bit_SET); } #endif #endif // basic sub-system init pendsv_init(); timer_tim3_init(); led_init(); #if MICROPY_HW_HAS_SWITCH switch_init0(); #endif int first_soft_reset = true; soft_reset: // check if user switch held to select the reset mode led_state(1, 0); led_state(2, 1); led_state(3, 0); led_state(4, 0); uint reset_mode = 1; #if MICROPY_HW_HAS_SWITCH if (switch_get()) { for (uint i = 0; i < 3000; i++) { if (!switch_get()) { break; } HAL_Delay(20); if (i % 30 == 29) { if (++reset_mode > 3) { reset_mode = 1; } led_state(2, reset_mode & 1); led_state(3, reset_mode & 2); led_state(4, reset_mode & 4); } } // flash the selected reset mode for (uint i = 0; i < 6; i++) { led_state(2, 0); led_state(3, 0); led_state(4, 0); HAL_Delay(50); led_state(2, reset_mode & 1); led_state(3, reset_mode & 2); led_state(4, reset_mode & 4); HAL_Delay(50); } HAL_Delay(400); } #endif #if MICROPY_HW_ENABLE_RTC if (first_soft_reset) { rtc_init(); } #endif // more sub-system init #if MICROPY_HW_HAS_SDCARD if (first_soft_reset) { sdcard_init(); } #endif if (first_soft_reset) { storage_init(); } // GC init gc_init(&_heap_start, &_heap_end); // Micro Python init mp_init(); mp_obj_list_init(mp_sys_path, 0); mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_)); // current dir (or base dir of the script) mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_flash)); mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_flash_slash_lib)); mp_obj_list_init(mp_sys_argv, 0); // Change #if 0 to #if 1 if you want REPL on UART_6 (or another uart) // as well as on USB VCP #if 0 { mp_obj_t args[2] = { MP_OBJ_NEW_SMALL_INT(PYB_UART_6), MP_OBJ_NEW_SMALL_INT(115200), }; pyb_stdio_uart = pyb_uart_type.make_new((mp_obj_t)&pyb_uart_type, MP_ARRAY_SIZE(args), 0, args); } #else pyb_stdio_uart = NULL; #endif // Initialise low-level sub-systems. Here we need to very basic things like // zeroing out memory and resetting any of the sub-systems. Following this // we can run Python scripts (eg boot.py), but anything that is configurable // by boot.py must be set after boot.py is run. readline_init0(); pin_init0(); extint_init0(); timer_init0(); uart_init0(); #if MICROPY_HW_ENABLE_RNG rng_init0(); #endif i2c_init0(); spi_init0(); pyb_usb_init0(); // Initialise the local flash filesystem. // Create it if needed, and mount in on /flash. { // try to mount the flash FRESULT res = f_mount(&fatfs0, "/flash", 1); if (reset_mode == 3 || res == FR_NO_FILESYSTEM) { // no filesystem, or asked to reset it, so create a fresh one // LED on to indicate creation of LFS led_state(PYB_LED_R2, 1); uint32_t start_tick = HAL_GetTick(); res = f_mkfs("/flash", 0, 0); if (res == FR_OK) { // success creating fresh LFS } else { __fatal_error("could not create LFS"); } // set label f_setlabel("/flash/pybflash"); // create empty main.py FIL fp; f_open(&fp, "/flash/main.py", FA_WRITE | FA_CREATE_ALWAYS); UINT n; f_write(&fp, fresh_main_py, sizeof(fresh_main_py) - 1 /* don't count null terminator */, &n); // TODO check we could write n bytes f_close(&fp); // create .inf driver file f_open(&fp, "/flash/pybcdc.inf", FA_WRITE | FA_CREATE_ALWAYS); f_write(&fp, fresh_pybcdc_inf, sizeof(fresh_pybcdc_inf) - 1 /* don't count null terminator */, &n); f_close(&fp); // create readme file f_open(&fp, "/flash/README.txt", FA_WRITE | FA_CREATE_ALWAYS); f_write(&fp, fresh_readme_txt, sizeof(fresh_readme_txt) - 1 /* don't count null terminator */, &n); f_close(&fp); // keep LED on for at least 200ms sys_tick_wait_at_least(start_tick, 200); led_state(PYB_LED_R2, 0); } else if (res == FR_OK) { // mount sucessful } else { __fatal_error("could not access LFS"); } } // The current directory is used as the boot up directory. // It is set to the internal flash filesystem by default. f_chdrive("/flash"); // Make sure we have a /flash/boot.py. Create it if needed. { FILINFO fno; #if _USE_LFN fno.lfname = NULL; fno.lfsize = 0; #endif FRESULT res = f_stat("/flash/boot.py", &fno); if (res == FR_OK) { if (fno.fattrib & AM_DIR) { // exists as a directory // TODO handle this case // see http://elm-chan.org/fsw/ff/img/app2.c for a "rm -rf" implementation } else { // exists as a file, good! } } else { // doesn't exist, create fresh file // LED on to indicate creation of boot.py led_state(PYB_LED_R2, 1); uint32_t start_tick = HAL_GetTick(); FIL fp; f_open(&fp, "/flash/boot.py", FA_WRITE | FA_CREATE_ALWAYS); UINT n; f_write(&fp, fresh_boot_py, sizeof(fresh_boot_py) - 1 /* don't count null terminator */, &n); // TODO check we could write n bytes f_close(&fp); // keep LED on for at least 200ms sys_tick_wait_at_least(start_tick, 200); led_state(PYB_LED_R2, 0); } } #if defined(USE_DEVICE_MODE) usb_storage_medium_t usb_medium = USB_STORAGE_MEDIUM_FLASH; #endif #if MICROPY_HW_HAS_SDCARD // if an SD card is present then mount it on /sd/ if (sdcard_is_present()) { FRESULT res = f_mount(&fatfs1, "/sd", 1); if (res != FR_OK) { printf("[SD] could not mount SD card\n"); } else { // use SD card as current directory f_chdrive("/sd"); // TODO these should go before the /flash entries in the path mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_sd)); mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_sd_slash_lib)); if (first_soft_reset) { // use SD card as medium for the USB MSD #if defined(USE_DEVICE_MODE) usb_medium = USB_STORAGE_MEDIUM_SDCARD; #endif } } } #endif // reset config variables; they should be set by boot.py pyb_config_main = MP_OBJ_NULL; pyb_config_usb_mode = MP_OBJ_NULL; // run boot.py, if it exists // TODO perhaps have pyb.reboot([bootpy]) function to soft-reboot and execute custom boot.py if (reset_mode == 1) { const char *boot_py = "boot.py"; FRESULT res = f_stat(boot_py, NULL); if (res == FR_OK) { int ret = pyexec_file(boot_py); if (ret & PYEXEC_FORCED_EXIT) { goto soft_reset_exit; } if (!ret) { flash_error(4); } } } // turn boot-up LEDs off led_state(2, 0); led_state(3, 0); led_state(4, 0); // Now we initialise sub-systems that need configuration from boot.py, // or whose initialisation can be safely deferred until after running // boot.py. #if defined(USE_HOST_MODE) // USB host pyb_usb_host_init(); #elif defined(USE_DEVICE_MODE) // USB device usb_device_mode_t usb_mode = USB_DEVICE_MODE_CDC_MSC; // if we are not in reset_mode==1, this config variable will always be NULL if (pyb_config_usb_mode != MP_OBJ_NULL) { if (strcmp(mp_obj_str_get_str(pyb_config_usb_mode), "CDC+HID") == 0) { usb_mode = USB_DEVICE_MODE_CDC_HID; } } pyb_usb_dev_init(usb_mode, usb_medium); #endif #if MICROPY_HW_HAS_MMA7660 // MMA accel: init and reset accel_init(); #endif #if MICROPY_HW_ENABLE_SERVO // servo servo_init(); #endif #if MICROPY_HW_ENABLE_DAC // DAC dac_init(); #endif mod_network_init(); // At this point everything is fully configured and initialised. // Run the main script from the current directory. if (reset_mode == 1 && pyexec_mode_kind == PYEXEC_MODE_FRIENDLY_REPL) { const char *main_py; if (pyb_config_main == MP_OBJ_NULL) { main_py = "main.py"; } else { main_py = mp_obj_str_get_str(pyb_config_main); } FRESULT res = f_stat(main_py, NULL); if (res == FR_OK) { int ret = pyexec_file(main_py); if (ret & PYEXEC_FORCED_EXIT) { goto soft_reset_exit; } if (!ret) { flash_error(3); } } } // Main script is finished, so now go into REPL mode. // The REPL mode can change, or it can request a soft reset. for (;;) { if (pyexec_mode_kind == PYEXEC_MODE_RAW_REPL) { if (pyexec_raw_repl() != 0) { break; } } else { if (pyexec_friendly_repl() != 0) { break; } } } soft_reset_exit: // soft reset printf("PYB: sync filesystems\n"); storage_flush(); printf("PYB: soft reboot\n"); timer_deinit(); uart_deinit(); first_soft_reset = false; goto soft_reset; }
/// \function freq([sys_freq]) /// /// If given no arguments, returns a tuple of clock frequencies: /// (SYSCLK, HCLK, PCLK1, PCLK2). /// /// If given an argument, sets the system frequency to that value in Hz. /// Eg freq(120000000) gives 120MHz. Note that not all values are /// supported and the largest supported frequency not greater than /// the given sys_freq will be selected. STATIC mp_obj_t pyb_freq(mp_uint_t n_args, const mp_obj_t *args) { if (n_args == 0) { // get mp_obj_t tuple[4] = { mp_obj_new_int(HAL_RCC_GetSysClockFreq()), mp_obj_new_int(HAL_RCC_GetHCLKFreq()), mp_obj_new_int(HAL_RCC_GetPCLK1Freq()), mp_obj_new_int(HAL_RCC_GetPCLK2Freq()), }; return mp_obj_new_tuple(4, tuple); } else { // set mp_int_t wanted_sysclk = mp_obj_get_int(args[0]) / 1000000; // search for a valid PLL configuration that keeps USB at 48MHz for (; wanted_sysclk > 0; wanted_sysclk--) { for (mp_uint_t p = 2; p <= 8; p += 2) { if (wanted_sysclk * p % 48 != 0) { continue; } mp_uint_t q = wanted_sysclk * p / 48; if (q < 2 || q > 15) { continue; } if (wanted_sysclk * p % (HSE_VALUE / 1000000) != 0) { continue; } mp_uint_t n_by_m = wanted_sysclk * p / (HSE_VALUE / 1000000); mp_uint_t m = 192 / n_by_m; while (m < (HSE_VALUE / 2000000) || n_by_m * m < 192) { m += 1; } if (m > (HSE_VALUE / 1000000)) { continue; } mp_uint_t n = n_by_m * m; if (n < 192 || n > 432) { continue; } // found values! // let the USB CDC have a chance to process before we change the clock HAL_Delay(USBD_CDC_POLLING_INTERVAL + 2); // set HSE as system clock source to allow modification of the PLL configuration RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSE; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { goto fail; } // re-configure PLL RCC_OscInitTypeDef RCC_OscInitStruct; RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = m; RCC_OscInitStruct.PLL.PLLN = n; RCC_OscInitStruct.PLL.PLLP = p; RCC_OscInitStruct.PLL.PLLQ = q; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { goto fail; } // set PLL as system clock source RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { goto fail; } // re-init TIM3 for USB CDC rate timer_tim3_init(); return mp_const_none; void __fatal_error(const char *msg); fail: __fatal_error("can't change freq"); } } nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "can't make valid freq")); } }