#include #include "py/runtime.h" #include "py/stream.h" #include "py/mperrno.h" #include "py/mphal.h" #include "extmod/misc.h" #include "usb.h" #include "uart.h" // this table converts from HAL_StatusTypeDef to POSIX errno const byte mp_hal_status_to_errno_table[4] = { [HAL_OK] = 0, [HAL_ERROR] = MP_EIO, [HAL_BUSY] = MP_EBUSY, [HAL_TIMEOUT] = MP_ETIMEDOUT, }; NORETURN void mp_hal_raise(HAL_StatusTypeDef status) { mp_raise_OSError(mp_hal_status_to_errno_table[status]); } MP_WEAK uintptr_t mp_hal_stdio_poll(uintptr_t poll_flags) { uintptr_t ret = 0; if (MP_STATE_PORT(pyb_stdio_uart) != NULL) { mp_obj_t pyb_stdio_uart = MP_OBJ_FROM_PTR(MP_STATE_PORT(pyb_stdio_uart)); int errcode; const mp_stream_p_t *stream_p = mp_get_stream(pyb_stdio_uart); ret = stream_p->ioctl(pyb_stdio_uart, MP_STREAM_POLL, poll_flags, &errcode); } return ret | mp_uos_dupterm_poll(poll_flags); } MP_WEAK int mp_hal_stdin_rx_chr(void) { for (;;) { #if 0 #ifdef USE_HOST_MODE pyb_usb_host_process(); int c = pyb_usb_host_get_keyboard(); if (c != 0) { return c; } #endif #endif if (MP_STATE_PORT(pyb_stdio_uart) != NULL && uart_rx_any(MP_STATE_PORT(pyb_stdio_uart))) { return uart_rx_char(MP_STATE_PORT(pyb_stdio_uart)); } int dupterm_c = mp_uos_dupterm_rx_chr(); if (dupterm_c >= 0) { return dupterm_c; } MICROPY_EVENT_POLL_HOOK } } MP_WEAK void mp_hal_stdout_tx_strn(const char *str, size_t len) { if (MP_STATE_PORT(pyb_stdio_uart) != NULL) { uart_tx_strn(MP_STATE_PORT(pyb_stdio_uart), str, len); } #if 0 && defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD lcd_print_strn(str, len); #endif mp_uos_dupterm_tx_strn(str, len); } #if __CORTEX_M >= 0x03 void mp_hal_ticks_cpu_enable(void) { if (!(DWT->CTRL & DWT_CTRL_CYCCNTENA_Msk)) { CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk; #if defined(__CORTEX_M) && __CORTEX_M == 7 // on Cortex-M7 we must unlock the DWT before writing to its registers DWT->LAR = 0xc5acce55; #endif DWT->CYCCNT = 0; DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk; } } #endif void mp_hal_gpio_clock_enable(GPIO_TypeDef *gpio) { #if defined(STM32L476xx) || defined(STM32L496xx) if (gpio == GPIOG) { // Port G pins 2 thru 15 are powered using VddIO2 on these MCUs. HAL_PWREx_EnableVddIO2(); } #endif // This logic assumes that all the GPIOx_EN bits are adjacent and ordered in one register #if defined(STM32F0) || defined(STM32L1) #define AHBxENR AHBENR #define AHBxENR_GPIOAEN_Pos RCC_AHBENR_GPIOAEN_Pos #elif defined(STM32F4) || defined(STM32F7) #define AHBxENR AHB1ENR #define AHBxENR_GPIOAEN_Pos RCC_AHB1ENR_GPIOAEN_Pos #elif defined(STM32H7) #define AHBxENR AHB4ENR #define AHBxENR_GPIOAEN_Pos RCC_AHB4ENR_GPIOAEN_Pos #elif defined(STM32L0) #define AHBxENR IOPENR #define AHBxENR_GPIOAEN_Pos RCC_IOPENR_IOPAEN_Pos #elif defined(STM32G0) #define AHBxENR IOPENR #define AHBxENR_GPIOAEN_Pos RCC_IOPENR_GPIOAEN_Pos #elif defined(STM32G4) || defined(STM32L4) || defined(STM32WB) || defined(STM32WL) #define AHBxENR AHB2ENR #define AHBxENR_GPIOAEN_Pos RCC_AHB2ENR_GPIOAEN_Pos #endif uint32_t gpio_idx = ((uint32_t)gpio - GPIOA_BASE) / (GPIOB_BASE - GPIOA_BASE); RCC->AHBxENR |= 1 << (AHBxENR_GPIOAEN_Pos + gpio_idx); volatile uint32_t tmp = RCC->AHBxENR; // Delay after enabling clock (void)tmp; } void mp_hal_pin_config(mp_hal_pin_obj_t pin_obj, uint32_t mode, uint32_t pull, uint32_t alt) { GPIO_TypeDef *gpio = pin_obj->gpio; uint32_t pin = pin_obj->pin; mp_hal_gpio_clock_enable(gpio); if (mode == MP_HAL_PIN_MODE_ALT || mode == MP_HAL_PIN_MODE_ALT_OPEN_DRAIN) { // To avoid any I/O glitches, make sure a valid alternate function is set in // AFR first before switching the pin mode. When switching from AF to INPUT or // OUTPUT, the AF in AFR will remain valid up until the pin mode is switched. gpio->AFR[pin >> 3] = (gpio->AFR[pin >> 3] & ~(15 << (4 * (pin & 7)))) | (alt << (4 * (pin & 7))); } gpio->MODER = (gpio->MODER & ~(3 << (2 * pin))) | ((mode & 3) << (2 * pin)); #if defined(GPIO_ASCR_ASC0) // The L4 has a special analog switch to connect the GPIO to the ADC gpio->OTYPER = (gpio->OTYPER & ~(1 << pin)) | (((mode >> 2) & 1) << pin); gpio->ASCR = (gpio->ASCR & ~(1 << pin)) | ((mode >> 3) & 1) << pin; #else gpio->OTYPER = (gpio->OTYPER & ~(1 << pin)) | ((mode >> 2) << pin); #endif gpio->OSPEEDR = (gpio->OSPEEDR & ~(3 << (2 * pin))) | (2 << (2 * pin)); // full speed gpio->PUPDR = (gpio->PUPDR & ~(3 << (2 * pin))) | (pull << (2 * pin)); } bool mp_hal_pin_config_alt(mp_hal_pin_obj_t pin, uint32_t mode, uint32_t pull, uint8_t fn, uint8_t unit) { const pin_af_obj_t *af = pin_find_af(pin, fn, unit); if (af == NULL) { return false; } mp_hal_pin_config(pin, mode, pull, af->idx); return true; } void mp_hal_pin_config_speed(mp_hal_pin_obj_t pin_obj, uint32_t speed) { GPIO_TypeDef *gpio = pin_obj->gpio; uint32_t pin = pin_obj->pin; gpio->OSPEEDR = (gpio->OSPEEDR & ~(3 << (2 * pin))) | (speed << (2 * pin)); } /*******************************************************************************/ // MAC address // Generate a random locally administered MAC address (LAA) void mp_hal_generate_laa_mac(int idx, uint8_t buf[6]) { uint8_t *id = (uint8_t *)MP_HAL_UNIQUE_ID_ADDRESS; buf[0] = 0x02; // LAA range buf[1] = (id[11] << 4) | (id[10] & 0xf); buf[2] = (id[9] << 4) | (id[8] & 0xf); buf[3] = (id[7] << 4) | (id[6] & 0xf); buf[4] = id[2]; buf[5] = (id[0] << 2) | idx; } // A board can override this if needed MP_WEAK void mp_hal_get_mac(int idx, uint8_t buf[6]) { mp_hal_generate_laa_mac(idx, buf); } void mp_hal_get_mac_ascii(int idx, size_t chr_off, size_t chr_len, char *dest) { static const char hexchr[16] = "0123456789ABCDEF"; uint8_t mac[6]; mp_hal_get_mac(idx, mac); for (; chr_len; ++chr_off, --chr_len) { *dest++ = hexchr[mac[chr_off >> 1] >> (4 * (1 - (chr_off & 1))) & 0xf]; } } MP_REGISTER_ROOT_POINTER(struct _pyb_uart_obj_t *pyb_stdio_uart);