j3d1/esp-open-rtos
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Use hwrand for the sdk uses of rand, in particular with the NMI.

Browse source 
The fiq NMI calls rand() from lmac:lmac.a:sdk_lmacTxFrame and the NMI
must not touch the newlib reent structure or enter critical regions
etc, so just use the simple and safe hwrand implementation as a
substitute.
This commit is contained in:
Our Air Quality 2017-07-20 16:24:45 +10:00
parent e17b1a5db6
commit 6a0da03809
2 changed files with 8 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
core/esp_hwrand.c
View file

@ -10,8 +10,13 @@
#include <esp/wdev_regs.h> #include <esp/wdev_regs.h>
#include <string.h> #include <string.h>
/* Return a random 32-bit number */ /* Return a random 32-bit number.
uint32_t hwrand(void) *
* This is also used as a substitute for rand() called from
* lmac.a:sdk_lmacTxFrame to avoid touching the newlib reent structures within
* the NMI and the NMI code needs to be in IRAM.
*/
uint32_t IRAM hwrand(void)
{ {
return WDEV.HWRNG; return WDEV.HWRNG;
} }

1
lib/allsymbols.rename
View file

@ -419,6 +419,7 @@ ram_set_txbb_atten sdk_ram_set_txbb_atten
ram_start_noisefloor sdk_ram_start_noisefloor ram_start_noisefloor sdk_ram_start_noisefloor
ram_tx_mac_disable sdk_ram_tx_mac_disable ram_tx_mac_disable sdk_ram_tx_mac_disable
ram_tx_mac_enable sdk_ram_tx_mac_enable ram_tx_mac_enable sdk_ram_tx_mac_enable
rand hwrand
rc4_skip sdk_rc4_skip rc4_skip sdk_rc4_skip
rcAttach sdk_rcAttach rcAttach sdk_rcAttach
rc_cal sdk_rc_cal rc_cal sdk_rc_cal