diff --git a/cpu/cc2538/periph/hwrng.c b/cpu/cc2538/periph/hwrng.c
index 705e0d2a0ad6351506fcc1242f39f74666a1b0ab..75056740529472b416e54613be881bf0beae6b40 100644
--- a/cpu/cc2538/periph/hwrng.c
+++ b/cpu/cc2538/periph/hwrng.c
@@ -69,16 +69,18 @@ void hwrng_init(void)
RFCORE_SFR_RFST = ISRFOFF;
}
-void hwrng_read(uint8_t *buf, unsigned int num)
+void hwrng_read(void *buf, unsigned int num)
{
unsigned count;
+ uint8_t *b = (uint8_t *)buf;
+
for (count = 0; count < num; ) {
/* Clock the RNG LSFR once: */
SOC_ADC->cc2538_adc_adccon1.ADCCON1bits.RCTRL = 1;
/* Read up to 2 bytes of hwrng data: */
- buf[count++] = SOC_ADC_RNDL;
+ b[count++] = SOC_ADC_RNDL;
if (count >= num) break;
- buf[count++] = SOC_ADC_RNDH;
+ b[count++] = SOC_ADC_RNDH;
}
}
diff --git a/cpu/kinetis_common/periph/hwrng_rnga.c b/cpu/kinetis_common/periph/hwrng_rnga.c
index ed2ddbd6941565aaf2fc4a12be2c2d666661227a..9adf07d110e3d5ea05bea2e46059a69a24ccd9b3 100644
--- a/cpu/kinetis_common/periph/hwrng_rnga.c
+++ b/cpu/kinetis_common/periph/hwrng_rnga.c
@@ -32,9 +32,10 @@ void hwrng_init(void)
/* nothing to do here */
}
-void hwrng_read(uint8_t *buf, unsigned int num)
+void hwrng_read(void *buf, unsigned int num)
{
unsigned int count = 0;
+ uint8_t *b = (uint8_t *)buf;
/* power on and enable the device */
HWRNG_CLKEN();
@@ -53,7 +54,7 @@ void hwrng_read(uint8_t *buf, unsigned int num)
/* copy data into result vector */
for (int i = 0; i < 4 && count < num; i++) {
- buf[count++] = (uint8_t)tmp;
+ b[count++] = (uint8_t)tmp;
tmp = tmp >> 8;
}
}
diff --git a/cpu/kinetis_common/periph/hwrng_rngb.c b/cpu/kinetis_common/periph/hwrng_rngb.c
index 7f105ca989041f26d45c6547e89875421766b131..865c204e76641838da7766610e7e966462362fd7 100644
--- a/cpu/kinetis_common/periph/hwrng_rngb.c
+++ b/cpu/kinetis_common/periph/hwrng_rngb.c
@@ -33,9 +33,10 @@ void hwrng_init(void)
/* nothing to be done here */
}
-void hwrng_read(uint8_t *buf, unsigned int num)
+void hwrng_read(void *buf, unsigned int num)
{
unsigned int count = 0;
+ uint8_t *b = (uint8_t *)buf;
HWRNG_CLKEN();
@@ -59,7 +60,7 @@ void hwrng_read(uint8_t *buf, unsigned int num)
/* copy data into result vector */
for (int i = 0; i < 4 && count < num; i++) {
- buf[count++] = (uint8_t)tmp;
+ b[count++] = (uint8_t)tmp;
tmp = tmp >> 8;
}
}
diff --git a/cpu/native/periph/hwrng.c b/cpu/native/periph/hwrng.c
index 3ce70dac941bbd0e8e6a615959749937be8aece4..553acd282b87788bb52e3015972f9a6b1462354c 100644
--- a/cpu/native/periph/hwrng.c
+++ b/cpu/native/periph/hwrng.c
@@ -70,8 +70,10 @@ void hwrng_init(void)
initialized = 1;
}
-void hwrng_read(uint8_t *buf, unsigned int num)
+void hwrng_read(void *buf, unsigned int num)
{
+ uint8_t *b = (uint8_t *)buf;
+
if (!initialized) {
warnx("hwrng_read: random device not initialized, failing\n");
return;
@@ -80,10 +82,10 @@ void hwrng_read(uint8_t *buf, unsigned int num)
DEBUG("hwrng_read: writing %u bytes\n", num);
switch (_native_rng_mode) {
case 0:
- _native_rng_read_hq(buf, num);
+ _native_rng_read_hq(b, num);
break;
case 1:
- _native_rng_read_det(buf, num);
+ _native_rng_read_det(b, num);
break;
default:
err(EXIT_FAILURE, "hwrng_read: _native_rng_mode is in invalid state %i\n",
diff --git a/cpu/nrf5x_common/periph/hwrng.c b/cpu/nrf5x_common/periph/hwrng.c
index 832d1378b7361efdb3db72a0fbd161b1875a552e..ab3eb3ee2e72e9a3c94cf628cf2e3759fc061367 100644
--- a/cpu/nrf5x_common/periph/hwrng.c
+++ b/cpu/nrf5x_common/periph/hwrng.c
@@ -29,9 +29,10 @@ void hwrng_init(void)
/* nothing to do here */
}
-void hwrng_read(uint8_t *buf, unsigned int num)
+void hwrng_read(void *buf, unsigned int num)
{
unsigned int count = 0;
+ uint8_t *b = (uint8_t *)buf;
/* power on RNG */
#ifdef CPU_FAM_NRF51
@@ -46,7 +47,7 @@ void hwrng_read(uint8_t *buf, unsigned int num)
cpu_sleep_until_event();
}
- buf[count++] = (uint8_t)NRF_RNG->VALUE;
+ b[count++] = (uint8_t)NRF_RNG->VALUE;
/* NRF51 PAN #21 -> read value before clearing VALRDY */
NRF_RNG->EVENTS_VALRDY = 0;
}
diff --git a/cpu/sam3/periph/hwrng.c b/cpu/sam3/periph/hwrng.c
index 41e02bc336b64a2e9587e8e2938bb3a513f5aafe..15b40e15ecd89f7026c8af559c33d7313100aa82 100644
--- a/cpu/sam3/periph/hwrng.c
+++ b/cpu/sam3/periph/hwrng.c
@@ -32,9 +32,10 @@ void hwrng_init(void)
/* no need for initialization */
}
-void hwrng_read(uint8_t *buf, unsigned int num)
+void hwrng_read(void *buf, unsigned int num)
{
unsigned count = 0;
+ uint8_t *b = (uint8_t *)buf;
/* enable clock signal for TRNG module */
PMC->PMC_PCER1 |= PMC_PCER1_PID41;
@@ -48,7 +49,7 @@ void hwrng_read(uint8_t *buf, unsigned int num)
uint32_t tmp = TRNG->TRNG_ODATA;
/* extract copy bytes to result */
for (int i = 0; i < 4 && count < num; i++) {
- buf[count++] = (uint8_t)tmp;
+ b[count++] = (uint8_t)tmp;
tmp = tmp >> 8;
}
}
diff --git a/cpu/stm32f2/periph/hwrng.c b/cpu/stm32f2/periph/hwrng.c
index 6412c1e6729cda417edabcfe8405a005163a1500..52bf752ac4897f5f66309f0f8903692bf23529e6 100644
--- a/cpu/stm32f2/periph/hwrng.c
+++ b/cpu/stm32f2/periph/hwrng.c
@@ -36,11 +36,12 @@ void hwrng_init(void)
}
-void hwrng_read(uint8_t *buf, unsigned int num)
+void hwrng_read(void *buf, unsigned int num)
{
/* cppcheck-suppress variableScope */
uint32_t tmp;
unsigned int count = 0;
+ uint8_t *b = (uint8_t *)buf;
/* enable RNG reset state */
periph_clk_en(AHB2, RCC_AHB2ENR_RNGEN);
@@ -54,7 +55,7 @@ void hwrng_read(uint8_t *buf, unsigned int num)
tmp = RNG->DR;
/* copy data into result vector */
for (int i = 0; i < 4 && count < num; i++) {
- buf[count++] = (uint8_t)tmp;
+ b[count++] = (uint8_t)tmp;
tmp = tmp >> 8;
}
}
diff --git a/cpu/stm32f4/periph/hwrng.c b/cpu/stm32f4/periph/hwrng.c
index e54deeedd7c54319bd1fd5cd89cecd4b63264772..38f1543b62afbc0ddf72ef35c5e1cb46e6f704cd 100644
--- a/cpu/stm32f4/periph/hwrng.c
+++ b/cpu/stm32f4/periph/hwrng.c
@@ -30,9 +30,10 @@ void hwrng_init(void)
/* no need for initialization */
}
-void hwrng_read(uint8_t *buf, unsigned int num)
+void hwrng_read(void *buf, unsigned int num)
{
unsigned int count = 0;
+ uint8_t *b = (uint8_t *)buf;
/* power on and enable the device */
periph_clk_en(AHB2, RCC_AHB2ENR_RNGEN);
@@ -46,7 +47,7 @@ void hwrng_read(uint8_t *buf, unsigned int num)
uint32_t tmp = RNG->DR;
/* copy data into result vector */
for (int i = 0; i < 4 && count < num; i++) {
- buf[count++] = (uint8_t)tmp;
+ b[count++] = (uint8_t)tmp;
tmp = tmp >> 8;
}
}
diff --git a/drivers/include/periph/hwrng.h b/drivers/include/periph/hwrng.h
index e3c693143d0af7ec89ddf4326461691364ffb888..8c106f5ee5f56051aa458717c9b022eaf22d1f3e 100644
--- a/drivers/include/periph/hwrng.h
+++ b/drivers/include/periph/hwrng.h
@@ -57,7 +57,7 @@ void hwrng_init(void);
* @param[in] buf destination buffer to write the bytes to
* @param[in] num number of bytes to get from device
*/
-void hwrng_read(uint8_t *buf, unsigned int num);
+void hwrng_read(void *buf, unsigned int num);
#ifdef __cplusplus
}