void spi_start(void)
{
/* Reset flash chip */
gpio_clear(GPIOD, BL_SPI2_RST);
wait(10);
gpio_set(GPIOD, BL_SPI2_RST);
wait(10);
gpio_set(GPIOD, BL_SPI2_WP);
/* No WriteProtect, Set Chip select to 1(no select) */
gpio_set(GPIOB, BL_SPI2_NSS);
/* Reset and disable SPI */
spi_reset(SPI2);
/* Disable I2S */
SPI2_I2SCFGR = 0;
/* CR1 */
spi_set_clock_phase_0(SPI2); /* CPHA = 0 */
spi_set_clock_polarity_0(SPI2); /* CPOL = 0 */
spi_send_msb_first(SPI2); /* LSB = 0 */
spi_set_full_duplex_mode(SPI2); /* RXONLY = 0 */
spi_set_unidirectional_mode(SPI2); /* BIDI = 0 */
spi_enable_software_slave_management(SPI2); /* SSM = 1 */
spi_set_nss_high(SPI2); /* SSI = 1 */
spi_set_master_mode(SPI2); /* MSTR = 1 */
spi_set_dff_8bit(SPI2); /* DFf = 8 bit */
// spi_enable_crc(SPI2);
/* XXX: Too fast? Maybe DIV_4 will be better? */
spi_set_baudrate_prescaler(SPI2, SPI_CR1_BR_FPCLK_DIV_2);
/* CR2 */
spi_enable_ss_output(SPI2); /* SSOE = 1 */
/* Disable regular interrupt flags */
spi_disable_tx_buffer_empty_interrupt(SPI2);
spi_disable_rx_buffer_not_empty_interrupt(SPI2);
spi_disable_error_interrupt(SPI2);
/* Enabling RX/TX DMA flags */
spi_enable_tx_dma(SPI2);
spi_enable_rx_dma(SPI2);
d_print("REG: %lu:%lu\r\n", SPI_CR1(SPI2), SPI_CR2(SPI2));
spi_enable(SPI2);
}
void mew_spi_flash_init(void) {
gpio_mode_setup(MEW_FLASH_GPIO_PORT_WP, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, MEW_FLASH_GPIO_PIN_WP);
gpio_set_output_options(MEW_FLASH_GPIO_PORT_WP, GPIO_OTYPE_PP, GPIO_OSPEED_100MHZ, MEW_FLASH_GPIO_PIN_WP);
gpio_set(MEW_FLASH_GPIO_PORT_WP, MEW_FLASH_GPIO_PIN_WP);
gpio_mode_setup(MEW_FLASH_GPIO_PORT_HOLD, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, MEW_FLASH_GPIO_PIN_HOLD);
gpio_set_output_options(MEW_FLASH_GPIO_PORT_HOLD, GPIO_OTYPE_PP, GPIO_OSPEED_100MHZ, MEW_FLASH_GPIO_PIN_HOLD);
gpio_set(MEW_FLASH_GPIO_PORT_HOLD, MEW_FLASH_GPIO_PIN_HOLD);
gpio_mode_setup(MEW_FLASH_GPIO_PORT_CS, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, MEW_FLASH_GPIO_PIN_CS);
gpio_set_output_options(MEW_FLASH_GPIO_PORT_CS, GPIO_OTYPE_PP, GPIO_OSPEED_100MHZ, MEW_FLASH_GPIO_PIN_CS);
gpio_set(MEW_FLASH_GPIO_PORT_CS, MEW_FLASH_GPIO_PIN_CS);
gpio_mode_setup(MEW_FLASH_SPI_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLDOWN, MEW_FLASH_SPI_GPIO_PINS);
gpio_set_output_options(MEW_FLASH_SPI_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_100MHZ, MEW_FLASH_SPI_GPIO_PINS);
gpio_set_af(MEW_FLASH_SPI_GPIO_PORT, MEW_FLASH_SPI_GPIO_AF_NUMBER, MEW_FLASH_SPI_GPIO_PINS);
spi_disable(MEW_FLASH_SPI);
spi_set_master_mode(MEW_FLASH_SPI);
spi_set_baudrate_prescaler(MEW_FLASH_SPI, SPI_CR1_BR_FPCLK_DIV_2);
spi_set_clock_polarity_0(MEW_FLASH_SPI);
spi_set_clock_phase_0(MEW_FLASH_SPI);
spi_set_unidirectional_mode(MEW_FLASH_SPI);
spi_enable_software_slave_management(MEW_FLASH_SPI);
spi_send_msb_first(MEW_FLASH_SPI);
spi_set_nss_high(MEW_FLASH_SPI);
SPI_I2SCFGR(MEW_FLASH_SPI) &= ~SPI_I2SCFGR_I2SMOD;
spi_disable_tx_buffer_empty_interrupt(MEW_FLASH_SPI);
spi_disable_rx_buffer_not_empty_interrupt(MEW_FLASH_SPI);
spi_disable_error_interrupt(MEW_FLASH_SPI);
spi_disable_tx_dma(MEW_FLASH_SPI);
spi_disable_rx_dma(MEW_FLASH_SPI);
spi_set_dff_8bit(MEW_FLASH_SPI);
spi_send_msb_first(MEW_FLASH_SPI);
spi_enable(MEW_FLASH_SPI);
}
