Merge pull request adafruit#1354 from tannewt/nrf_feather_fixes

A few fixes for nRF52840 feather QSPI and neopixel

Author: dhalbert

ports/nrf/boards/feather_nrf52840_express/mpconfigboard.h

@@ -35,12 +35,21 @@
 
 #define MICROPY_HW_NEOPIXEL (&pin_P0_16)
 
+#ifdef QSPI_FLASH_FILESYSTEM
 #define MICROPY_QSPI_DATA0 NRF_GPIO_PIN_MAP(0, 17)
 #define MICROPY_QSPI_DATA1 NRF_GPIO_PIN_MAP(0, 22)
 #define MICROPY_QSPI_DATA2 NRF_GPIO_PIN_MAP(0, 23)
 #define MICROPY_QSPI_DATA3 NRF_GPIO_PIN_MAP(0, 21)
 #define MICROPY_QSPI_SCK NRF_GPIO_PIN_MAP(0, 19)
 #define MICROPY_QSPI_CS NRF_GPIO_PIN_MAP(0, 20)
+#endif
+
+#ifdef SPI_FLASH_FILESYSTEM
+#define SPI_FLASH_MOSI_PIN &pin_P0_17
+#define SPI_FLASH_MISO_PIN &pin_P0_22
+#define SPI_FLASH_SCK_PIN &pin_P0_19
+#define SPI_FLASH_CS_PIN &pin_P0_20
+#endif
 
 #define CIRCUITPY_AUTORELOAD_DELAY_MS 500
 
@@ -51,8 +60,6 @@
 
 #define BOARD_FLASH_SIZE (FLASH_SIZE - 0x4000 - CIRCUITPY_INTERNAL_NVM_SIZE)
 
-#define EXTERNAL_FLASH_QSPI_DUAL (1)
-
 #define BOARD_HAS_CRYSTAL 1
 
 #define DEFAULT_I2C_BUS_SCL (&pin_P0_11)

ports/nrf/boards/feather_nrf52840_express/mpconfigboard.mk

@@ -20,6 +20,6 @@ endif
 
 NRF_DEFINES += -DNRF52840_XXAA -DNRF52840
 
-QSPI_FLASH_FILESYSTEM = 1
+SPI_FLASH_FILESYSTEM = 1
 EXTERNAL_FLASH_DEVICE_COUNT = 1
 EXTERNAL_FLASH_DEVICES = "GD25Q16C"

ports/nrf/common-hal/microcontroller/Pin.c

@@ -48,7 +48,6 @@ STATIC uint32_t claimed_pins[GPIO_COUNT];
 STATIC uint32_t never_reset_pins[GPIO_COUNT];
 
 void reset_all_pins(void) {
- return;
  for (size_t i = 0; i < GPIO_COUNT; i++) {
  claimed_pins[i] = never_reset_pins[i];
  }
@@ -77,7 +76,6 @@ void reset_all_pins(void) {
 
 // Mark pin as free and return it to a quiescent state.
 void reset_pin_number(uint8_t pin_number) {
- return;
  if (pin_number == NO_PIN) {
  return;
  }

ports/nrf/common-hal/neopixel_write/__init__.c

@@ -108,12 +108,21 @@ void common_hal_neopixel_write (const digitalio_digitalinout_obj_t* digitalinout
  // using DWT
  uint32_t pattern_size = numBytes * 8 * sizeof(uint16_t) + 2 * sizeof(uint16_t);
  uint16_t* pixels_pattern = NULL;
+ bool pattern_on_heap = false;
+
+ // Use the stack to store 1 pixels worth of PWM data for the status led. uint32_t to ensure alignment.
+ uint32_t one_pixel[8 * sizeof(uint16_t) + 1];
 
  NRF_PWM_Type* pwm = find_free_pwm();
 
  // only malloc if there is PWM device available
  if ( pwm != NULL ) {
- pixels_pattern = (uint16_t *) m_malloc(pattern_size, false);
+ if (numBytes == 4) {
+ pixels_pattern = (uint16_t *) one_pixel;
+ } else {
+ pixels_pattern = (uint16_t *) m_malloc_maybe(pattern_size, false);
+ pattern_on_heap = true;
+ }
  }
 
  // Use the identified device to choose the implementation
@@ -193,7 +202,10 @@ void common_hal_neopixel_write (const digitalio_digitalinout_obj_t* digitalinout
  nrf_pwm_disable(pwm);
  nrf_pwm_pins_set(pwm, (uint32_t[]) {0xFFFFFFFFUL, 0xFFFFFFFFUL, 0xFFFFFFFFUL, 0xFFFFFFFFUL} );
 
- m_free(pixels_pattern);
+ if (pattern_on_heap) {
+ m_free(pixels_pattern);
+ }
+
  } // End of DMA implementation
  // ---------------------------------------------------------------------
  else {