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machine/stm32f4, stm32f7, stm32l4: implement TRNG for randomness

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Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
2021-12-14 18:17:33 +01:00
committed by Ron Evans
parent 2ebaa9f520
commit e1df2510d4
6 changed files with 54 additions and 2 deletions
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src/machine/machine_stm32l4.go
+10
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@@ -1,3 +1,4 @@
//go:build stm32l4
// +build stm32l4
package machine
@@ -494,3 +495,12 @@ const (
ARR_MAX = 0x10000
PSC_MAX = 0x10000
)
func initRNG() {
stm32.RCC.CRRCR.SetBits(stm32.RCC_CRRCR_HSI48ON)
for !stm32.RCC.CRRCR.HasBits(stm32.RCC_CRRCR_HSI48RDY) {
}
stm32.RCC.AHB2ENR.SetBits(stm32.RCC_AHB2ENR_RNGEN)
stm32.RNG.CR.SetBits(stm32.RNG_CR_RNGEN)
}