uhd

spi_flash_erase_sector_start(uint32_t flash_addr)

{

  //uprintf(UART_DEBUG, "spi_flash_erase_sector_start: addr = 0x%x\n", flash_addr);

  spi_flash_wait();

  spi_flash_write_enable();

  if (nbytes == 0 || nbytes > SPI_FLASH_PAGE_SIZE)

    return false;

  uint32_t local_buf[SPI_FLASH_PAGE_SIZE / sizeof(uint32_t)];

  memset(local_buf, 0xff, sizeof(local_buf));	// init to 0xff (nops when programming)

  memcpy(local_buf, buf, nbytes);

  const unsigned char *p = (const unsigned char *) buf;

  size_t n;

  if (nbytes == 0)

    return true;

spi_flash_async_erase_start(spi_flash_async_state_t *s,

			    uint32_t flash_addr, size_t nbytes)

{

    s->first = s->last = s->current = 0;

    return;

  }