URL https://opencores.org/ocsvn/neorv32/neorv32/trunk

Subversion Repositories neorv32

[/] [neorv32/] [trunk/] [sw/] [lib/] [source/] [neorv32_trng.c] - Diff between revs 64 and 68

Rev 64	Rev 68
Line 97...	Line 97...
`* @param[in,out] data uint8_t pointer for storing random data byte.`	`* @param[in,out] data uint8_t pointer for storing random data byte.`
`* @return Data is valid when 0 and invalid otherwise.`	`* @return Data is valid when 0 and invalid otherwise.`
`**************************************************************************/`	`**************************************************************************/`
`int neorv32_trng_get(uint8_t *data) {`	`int neorv32_trng_get(uint8_t *data) {`

`const int retries = 3;`
`int i;`
`uint32_t ct_reg;`	`uint32_t ct_reg;`

`for (i=0; i<retries; i++) {`
`ct_reg = NEORV32_TRNG.CTRL;`	`ct_reg = NEORV32_TRNG.CTRL;`

`if ((ct_reg & (1<<TRNG_CTRL_VALID)) == 0) { // output data valid?`	`if (ct_reg & (1<<TRNG_CTRL_VALID)) { // output data valid?`
`continue;`
`}`

`*data = (uint8_t)(ct_reg >> TRNG_CTRL_DATA_LSB);`	`*data = (uint8_t)(ct_reg >> TRNG_CTRL_DATA_LSB);`
`return 0; // valid data`	`return 0; // valid data`
`}`	`}`
	`else {`
`return -1; // no valid data available`	`return -1;`
	`}`
`}`	`}`

`No newline at end of file`	`No newline at end of file`