EFUSE
EFUSE HAL driver provides high-level APIs to program and read efuse.
Main features include:
4 banks, each bank has 256 bits.
Banks need to be programmed one by one, multiple banks can be read simultaneously, but HAL only supports reading one bank at a time.
Using EFUSE HAL Driver
First, call HAL_EFUSE_Init only once to initialize efuse. It should be called after setting sysclk/hclk/pclk. If sysclk/hclk/pclk are updated, HAL_EFUSE_Init needs to be called again to update related time registers.
Use HAL_EFUSE_Write to program efuse with specified data, use HAL_EFUSE_Read to read data from efuse. For example,
{
/* Initialize efuse*/
HAL_EFUSE_Init();
uint8_t write_data[4];
write_data[0] = 1;
write_data[1] = 2;
write_data[2] = 3;
write_data[3] = 4;
/* write 4 bytes starting from bit32(bank0) */
HAL_EFUSE_Write(32, write_data, sizeof(write_data));
uint8_t read_data[4];
memset(read_data, 0, sizeof(read_data));
/* read 4bytes starting from bit32(bank0) */
HAL_EFUSE_Read(32, read_data, sizeof(read_data));
}