diff --git a/ports/stm32f4/boards/feather_stm32f405_express/mpconfigboard.h b/ports/stm32f4/boards/feather_stm32f405_express/mpconfigboard.h index 67ddc885ae93..dc88f695a9e5 100644 --- a/ports/stm32f4/boards/feather_stm32f405_express/mpconfigboard.h +++ b/ports/stm32f4/boards/feather_stm32f405_express/mpconfigboard.h @@ -35,11 +35,13 @@ #define AUTORESET_DELAY_MS 500 #define BOARD_FLASH_SIZE (FLASH_SIZE - 0x4000) +#define MICROPY_HW_NEOPIXEL (&pin_PC00) + // On-board flash -#define SPI_FLASH_MOSI_PIN &pin_PB05 -#define SPI_FLASH_MISO_PIN &pin_PB04 -#define SPI_FLASH_SCK_PIN &pin_PB03 -#define SPI_FLASH_CS_PIN &pin_PA15 +#define SPI_FLASH_MOSI_PIN (&pin_PB05) +#define SPI_FLASH_MISO_PIN (&pin_PB04) +#define SPI_FLASH_SCK_PIN (&pin_PB03) +#define SPI_FLASH_CS_PIN (&pin_PA15) #define DEFAULT_I2C_BUS_SCL (&pin_PB06) #define DEFAULT_I2C_BUS_SDA (&pin_PB07) diff --git a/ports/stm32f4/boards/feather_stm32f405_express/pins.c b/ports/stm32f4/boards/feather_stm32f405_express/pins.c index 4aa1f362ad6a..180fdd0937b8 100644 --- a/ports/stm32f4/boards/feather_stm32f405_express/pins.c +++ b/ports/stm32f4/boards/feather_stm32f405_express/pins.c @@ -26,6 +26,7 @@ STATIC const mp_rom_map_elem_t board_module_globals_table[] = { { MP_ROM_QSTR(MP_QSTR_TX), MP_ROM_PTR(&pin_PB10) }, { MP_ROM_QSTR(MP_QSTR_RX), MP_ROM_PTR(&pin_PB11) }, + { MP_ROM_QSTR(MP_QSTR_NEOPIXEL), MP_ROM_PTR(&pin_PC00) }, { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) }, { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) }, { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) }, diff --git a/ports/stm32f4/common-hal/microcontroller/Pin.c b/ports/stm32f4/common-hal/microcontroller/Pin.c index 7e737e21b416..21290e03c985 100644 --- a/ports/stm32f4/common-hal/microcontroller/Pin.c +++ b/ports/stm32f4/common-hal/microcontroller/Pin.c @@ -26,11 +26,17 @@ */ #include "shared-bindings/microcontroller/Pin.h" +#include "shared-bindings/digitalio/DigitalInOut.h" +#include "supervisor/shared/rgb_led_status.h" #include "py/mphal.h" #include "stm32f4/pins.h" #include "stm32f4xx_hal.h" +#ifdef MICROPY_HW_NEOPIXEL +bool neopixel_in_use; +#endif + #if MCU_PACKAGE == 144 #define GPIO_PORT_COUNT 7 GPIO_TypeDef * ports[GPIO_PORT_COUNT] = {GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, GPIOF, GPIOG}; @@ -53,6 +59,10 @@ void reset_all_pins(void) { for (uint8_t i = 0; i < GPIO_PORT_COUNT; i++) { HAL_GPIO_DeInit(ports[i], ~never_reset_pins[i]); } + + #ifdef MICROPY_HW_NEOPIXEL + neopixel_in_use = false; + #endif } // Mark pin as free and return it to a quiescent state. @@ -60,13 +70,18 @@ void reset_pin_number(uint8_t pin_port, uint8_t pin_number) { if (pin_port == 0x0F) { return; } - - // Clear claimed bit. + // Clear claimed bit & reset claimed_pins[pin_port] &= ~(1<port && pin_number == MICROPY_HW_NEOPIXEL->number) { + neopixel_in_use = false; + rgb_led_status_init(); + return; + } + #endif +} void never_reset_pin_number(uint8_t pin_port, uint8_t pin_number) { never_reset_pins[pin_port] |= 1<port] |= 1<number; + + #ifdef MICROPY_HW_NEOPIXEL + if (pin == MICROPY_HW_NEOPIXEL) { + neopixel_in_use = true; + } + #endif } bool pin_number_is_free(uint8_t pin_port, uint8_t pin_number) { @@ -90,6 +111,12 @@ bool pin_number_is_free(uint8_t pin_port, uint8_t pin_number) { } bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t *pin) { + #ifdef MICROPY_HW_NEOPIXEL + if (pin == MICROPY_HW_NEOPIXEL) { + return !neopixel_in_use; + } + #endif + return pin_number_is_free(pin->port, pin->number); } diff --git a/ports/stm32f4/common-hal/microcontroller/Pin.h b/ports/stm32f4/common-hal/microcontroller/Pin.h index 0c3fb375f791..c4c9be6a81ce 100644 --- a/ports/stm32f4/common-hal/microcontroller/Pin.h +++ b/ports/stm32f4/common-hal/microcontroller/Pin.h @@ -31,6 +31,14 @@ #include "peripherals/stm32f4/pins.h" +#ifdef MICROPY_HW_NEOPIXEL +extern bool neopixel_in_use; +#endif +#ifdef MICROPY_HW_APA102_MOSI +extern bool apa102_sck_in_use; +extern bool apa102_mosi_in_use; +#endif + void reset_all_pins(void); // reset_pin_number takes the pin number instead of the pointer so that objects don't // need to store a full pointer. diff --git a/ports/stm32f4/common-hal/neopixel_write/__init__.c b/ports/stm32f4/common-hal/neopixel_write/__init__.c new file mode 100644 index 000000000000..fd46825d038f --- /dev/null +++ b/ports/stm32f4/common-hal/neopixel_write/__init__.c @@ -0,0 +1,96 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2019 Lucian Copeland for Adafruit Industries + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "py/mphal.h" +#include "shared-bindings/neopixel_write/__init__.h" + +#include "tick.h" +#include "common-hal/microcontroller/Pin.h" +#include "stm32f4xx_hal.h" +#include "stm32f4xx_ll_gpio.h" + +uint64_t next_start_tick_ms = 0; +uint32_t next_start_tick_us = 1000; + +//sysclock divisors +#define MAGIC_800_INT 900000 // ~1.11 us -> 1.2 field +#define MAGIC_800_T0H 2800000 // ~0.36 us -> 0.44 field +#define MAGIC_800_T1H 1350000 // ~0.74 us -> 0.84 field + +void common_hal_neopixel_write (const digitalio_digitalinout_obj_t* digitalinout, uint8_t *pixels, + uint32_t numBytes) { + uint8_t *p = pixels, *end = p + numBytes, pix = *p++, mask = 0x80; + uint32_t start = 0; + uint32_t cyc = 0; + + //assumes 800_000Hz frequency + //Theoretical values here are 800_000 -> 1.25us, 2500000->0.4us, 1250000->0.8us + //But they don't work, possibly due to bad optimization? Use tested magic values instead + uint32_t sys_freq = HAL_RCC_GetSysClockFreq(); + uint32_t interval = sys_freq/MAGIC_800_INT; + uint32_t t0 = (sys_freq/MAGIC_800_T0H); + uint32_t t1 = (sys_freq/MAGIC_800_T1H); + + // This must be called while interrupts are on in case we're waiting for a + // future ms tick. + wait_until(next_start_tick_ms, next_start_tick_us); + + GPIO_TypeDef * p_port = pin_port(digitalinout->pin->port); + uint32_t p_mask = pin_mask(digitalinout->pin->number); + + __disable_irq(); + // Enable DWT in debug core. Useable when interrupts disabled, as opposed to Systick->VAL + //ITM->LAR = 0xC5ACCE55; //this should be required but isn't + CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk; + DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk; + DWT->CYCCNT = 0; + + for(;;) { + start = DWT->CYCCNT; + LL_GPIO_SetOutputPin(p_port, p_mask); + cyc = (pix & mask) ? t1 : t0; + while(DWT->CYCCNT - start < cyc); + LL_GPIO_ResetOutputPin(p_port, p_mask); + if(!(mask >>= 1)) { + if(p >= end) break; + pix = *p++; + mask = 0x80; + } + while(DWT->CYCCNT - start < interval); //wait for interval to finish + } + + // Enable interrupts again + __enable_irq(); + + // Update the next start. + current_tick(&next_start_tick_ms, &next_start_tick_us); + if (next_start_tick_us < 100) { + next_start_tick_ms += 1; + next_start_tick_us = 100 - next_start_tick_us; + } else { + next_start_tick_us -= 100; + } +} diff --git a/ports/stm32f4/mpconfigport.mk b/ports/stm32f4/mpconfigport.mk index bce68f99f4c9..928d53e67c3f 100644 --- a/ports/stm32f4/mpconfigport.mk +++ b/ports/stm32f4/mpconfigport.mk @@ -26,6 +26,7 @@ CIRCUITPY_STORAGE = 1 CIRCUITPY_RANDOM = 1 CIRCUITPY_USB_HID = 1 CIRCUITPY_USB_MIDI = 1 +CIRCUITPY_NEOPIXEL_WRITE = 1 #ifeq ($(MCU_SUB_VARIANT), stm32f412zx) #endif