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https://github.com/tinygo-org/tinygo.git
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Ron Evans
17302ca762
* initial implementation for Tillitis TKey device * add UART implementation for TKey * add Pin interface implementation for TKey touch sensor * add RNG interface implementation for TKey * add helpful machine package functions to return identifiers such as name and version for TKey * use built-in timer for sleep timing on TKey * modify UART implementation for TKey to implement Serialer interface * implement BLAKE2s ROM function call for TKey device * handle abort by triggering TKey device fault using illegal instruction to halt CPU * simplify TKey implementation by inheriting from existing riscv32 target * return error for trying to configure invalid baudrates on UART * add tkey to builder test * be very specific for features passed to LLVM for specific config in use for TKey * handle feedback items from TKey device code review Signed-off-by: deadprogram <ron@hybridgroup.com>
39 lines
637 B
Go
39 lines
637 B
Go
//go:build nrf || (stm32 && !(stm32f103 || stm32l0x1)) || (sam && atsamd51) || (sam && atsame5x) || esp32c3 || tkey
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// If you update the above build constraint, you'll probably also need to update
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// src/runtime/rand_hwrng.go.
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package rand
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import (
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"machine"
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)
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func init() {
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Reader = &reader{}
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}
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type reader struct {
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}
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func (r *reader) Read(b []byte) (n int, err error) {
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if len(b) == 0 {
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return
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}
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var randomByte uint32
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for i := range b {
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if i%4 == 0 {
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randomByte, err = machine.GetRNG()
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if err != nil {
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return n, err
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}
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} else {
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randomByte >>= 8
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}
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b[i] = byte(randomByte)
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}
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return len(b), nil
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}
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