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@ -36,33 +36,33 @@
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#include "py/mpconfig.h"
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digitalio_digitalinout_obj_t cs_pin;
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busio_spi_obj_t spi;
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busio_spi_obj_t supervisor_flash_spi_bus;
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const external_flash_device* flash_device;
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uint32_t spi_flash_baudrate;
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// Enable the flash over SPI.
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static void flash_enable(void) {
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while (!common_hal_busio_spi_try_lock(&spi)) {}
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while (!common_hal_busio_spi_try_lock(&supervisor_flash_spi_bus)) {}
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common_hal_digitalio_digitalinout_set_value(&cs_pin, false);
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}
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// Disable the flash over SPI.
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static void flash_disable(void) {
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common_hal_digitalio_digitalinout_set_value(&cs_pin, true);
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common_hal_busio_spi_unlock(&spi);
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common_hal_busio_spi_unlock(&supervisor_flash_spi_bus);
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}
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static bool transfer(uint8_t* command, uint32_t command_length, uint8_t* data_in, uint8_t* data_out, uint32_t data_length) {
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flash_enable();
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bool status = common_hal_busio_spi_write(&spi, command, command_length);
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bool status = common_hal_busio_spi_write(&supervisor_flash_spi_bus, command, command_length);
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if (status) {
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if (data_in != NULL && data_out != NULL) {
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status = common_hal_busio_spi_transfer(&spi, data_out, data_in, data_length);
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status = common_hal_busio_spi_transfer(&supervisor_flash_spi_bus, data_out, data_in, data_length);
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} else if (data_out != NULL) {
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status = common_hal_busio_spi_read(&spi, data_out, data_length, 0xff);
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status = common_hal_busio_spi_read(&supervisor_flash_spi_bus, data_out, data_length, 0xff);
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} else if (data_in != NULL) {
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status = common_hal_busio_spi_write(&spi, data_in, data_length);
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status = common_hal_busio_spi_write(&supervisor_flash_spi_bus, data_in, data_length);
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}
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}
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flash_disable();
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@ -103,10 +103,10 @@ bool spi_flash_write_data(uint32_t address, uint8_t* data, uint32_t data_length)
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// Write the SPI flash write address into the bytes following the command byte.
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address_to_bytes(address, request + 1);
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flash_enable();
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common_hal_busio_spi_configure(&spi, spi_flash_baudrate, 0, 0, 8);
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bool status = common_hal_busio_spi_write(&spi, request, 4);
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common_hal_busio_spi_configure(&supervisor_flash_spi_bus, spi_flash_baudrate, 0, 0, 8);
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bool status = common_hal_busio_spi_write(&supervisor_flash_spi_bus, request, 4);
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if (status) {
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status = common_hal_busio_spi_write(&spi, data, data_length);
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status = common_hal_busio_spi_write(&supervisor_flash_spi_bus, data, data_length);
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}
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flash_disable();
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return status;
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@ -122,10 +122,10 @@ bool spi_flash_read_data(uint32_t address, uint8_t* data, uint32_t data_length)
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// Write the SPI flash write address into the bytes following the command byte.
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address_to_bytes(address, request + 1);
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flash_enable();
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common_hal_busio_spi_configure(&spi, spi_flash_baudrate, 0, 0, 8);
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bool status = common_hal_busio_spi_write(&spi, request, command_length);
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common_hal_busio_spi_configure(&supervisor_flash_spi_bus, spi_flash_baudrate, 0, 0, 8);
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bool status = common_hal_busio_spi_write(&supervisor_flash_spi_bus, request, command_length);
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if (status) {
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status = common_hal_busio_spi_read(&spi, data, data_length, 0xff);
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status = common_hal_busio_spi_read(&supervisor_flash_spi_bus, data, data_length, 0xff);
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}
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flash_disable();
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return status;
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@ -140,9 +140,9 @@ void spi_flash_init(void) {
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common_hal_digitalio_digitalinout_switch_to_output(&cs_pin, true, DRIVE_MODE_PUSH_PULL);
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common_hal_digitalio_digitalinout_never_reset(&cs_pin);
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spi.base.type = &busio_spi_type;
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common_hal_busio_spi_construct(&spi, SPI_FLASH_SCK_PIN, SPI_FLASH_MOSI_PIN, SPI_FLASH_MISO_PIN);
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common_hal_busio_spi_never_reset(&spi);
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supervisor_flash_spi_bus.base.type = &busio_spi_type;
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common_hal_busio_spi_construct(&supervisor_flash_spi_bus, SPI_FLASH_SCK_PIN, SPI_FLASH_MOSI_PIN, SPI_FLASH_MISO_PIN);
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common_hal_busio_spi_never_reset(&supervisor_flash_spi_bus);
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}
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void spi_flash_init_device(const external_flash_device* device) {
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