status_code_t nvm_read_char(mem_type_t mem, uint32_t address, uint8_t *data)
{
switch (mem) {
case INT_FLASH:
*data = nvm_flash_read_byte((flash_addr_t)address);
break;
case INT_USERPAGE:
nvm_user_sig_read_buffer((flash_addr_t)address, (void *)data,
1);
break;
case INT_EEPROM:
*data = nvm_eeprom_read_byte((eeprom_addr_t)address);
break;
#if defined(USE_EXTMEM) && defined(CONF_BOARD_AT45DBX)
case AT45DBX:
if (!at45dbx_read_byte_open(address)) {
return ERR_BAD_ADDRESS;
}
*data = at45dbx_read_byte();
at45dbx_read_close();
break;
#endif
default:
return ERR_INVALID_ARG;
}
return STATUS_OK;
}
/**
* Test nvm_user_sig_read_buffer().
*
* Test procedure:
* - Write to user signature row
* - Read back with nvm_user_sig_read_buffer().
* - Verify contents
*
* \return STATUS_OK if test succeeded, otherwise ERR_BAD_DATA
*/
static status_code_t test_read(void)
{
uint8_t i;
uint8_t mybuffer[BUFFER_SIZE];
// Clear memory buffer
set_buffer(buffer, FLASH_ERASED);
// Set some test values
buffer[0] = 0xB0;
buffer[1] = 0x0B;
buffer[2] = 0xB0;
buffer[3] = 0x0B;
buffer[4] = 0xB0;
buffer[5] = 0x0B;
// Erase and write test values to user signature row
nvm_user_sig_write_buffer(TEST_ADDR, &buffer, BUFFER_SIZE, true);
// Read back
nvm_user_sig_read_buffer(TEST_ADDR, mybuffer, BUFFER_SIZE);
// Verify
for (i=0; i < BUFFER_SIZE; i++) {
if (buffer[i] != mybuffer[i]) {
return ERR_BAD_DATA;
}
}
return STATUS_OK;
}
/** \brief Read a buffer from non-volatile RAM
*
* This routine reads \c count Bytes from the NVRAM source pointed
* to by \c src to the destination buffer pointed to by \c dst.
*
* \param src the read source in the NVRAM address space
* \param dst the destination buffer in program data memory space
* \param count the number of Bytes to read
*
* \return Nothing.
*/
void nvram_read(nvram_addr_t src, void *dst, size_t count)
{
#if XMEGA
nvm_wait_until_ready();
nvm_user_sig_read_buffer((flash_addr_t)(src + SENSOR_NVM_OFFSET), dst,
count);
#elif UC3
memcpy(dst, (void *)(src + SENSOR_NVM_BASE + SENSOR_NVM_OFFSET), count);
#endif
}
status_code_t nvm_read(mem_type_t mem, uint32_t address, void *buffer,
uint32_t len)
{
switch (mem) {
case INT_FLASH:
nvm_flash_read_buffer((flash_addr_t)address, buffer,
(uint16_t)len);
break;
case INT_USERPAGE:
nvm_user_sig_read_buffer((flash_addr_t)address, buffer,
(uint16_t)len);
break;
case INT_EEPROM:
nvm_eeprom_read_buffer((eeprom_addr_t)address, buffer,
(uint16_t)len);
break;
#if defined(USE_EXTMEM) && defined(CONF_BOARD_AT45DBX)
case AT45DBX:
{
uint32_t sector = address / AT45DBX_SECTOR_SIZE;
if (!at45dbx_read_sector_open(sector)) {
return ERR_BAD_ADDRESS;
}
at45dbx_read_sector_to_ram(buffer);
at45dbx_read_close();
}
break;
#endif
default:
return ERR_INVALID_ARG;
}
return STATUS_OK;
}
