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Add board support for Adafruit Grand Central M4 (SAMD51) (#1714)

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machine/grandcentral-m4: implementation for Adafruit Grand Central M4 board.
This commit is contained in:
ardnew
2021-03-15 08:06:09 -05:00
committed by GitHub
parent 303acf5ed6
commit 99b129d366
7 changed files with 461 additions and 0 deletions
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src/runtime/runtime_atsamd51p20.go
+53
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// +build sam,atsamd51,atsamd51p20
package runtime
import (
"device/sam"
)
func initSERCOMClocks() {
// Turn on clock to SERCOM0 for UART0
sam.MCLK.APBAMASK.SetBits(sam.MCLK_APBAMASK_SERCOM0_)
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_SERCOM0_CORE].Set((sam.GCLK_PCHCTRL_GEN_GCLK1 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
// sets the "slow" clock shared by all SERCOM
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_SERCOMX_SLOW].Set((sam.GCLK_PCHCTRL_GEN_GCLK1 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
// Turn on clock to SERCOM1
sam.MCLK.APBAMASK.SetBits(sam.MCLK_APBAMASK_SERCOM1_)
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_SERCOM1_CORE].Set((sam.GCLK_PCHCTRL_GEN_GCLK1 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
// Turn on clock to SERCOM2
sam.MCLK.APBBMASK.SetBits(sam.MCLK_APBBMASK_SERCOM2_)
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_SERCOM2_CORE].Set((sam.GCLK_PCHCTRL_GEN_GCLK1 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
// Turn on clock to SERCOM3
sam.MCLK.APBBMASK.SetBits(sam.MCLK_APBBMASK_SERCOM3_)
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_SERCOM3_CORE].Set((sam.GCLK_PCHCTRL_GEN_GCLK1 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
// Turn on clock to SERCOM4
sam.MCLK.APBDMASK.SetBits(sam.MCLK_APBDMASK_SERCOM4_)
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_SERCOM4_CORE].Set((sam.GCLK_PCHCTRL_GEN_GCLK1 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
// Turn on clock to SERCOM5
sam.MCLK.APBDMASK.SetBits(sam.MCLK_APBDMASK_SERCOM5_)
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_SERCOM5_CORE].Set((sam.GCLK_PCHCTRL_GEN_GCLK1 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
// Turn on clock to SERCOM6
sam.MCLK.APBDMASK.SetBits(sam.MCLK_APBDMASK_SERCOM6_)
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_SERCOM6_CORE].Set((sam.GCLK_PCHCTRL_GEN_GCLK1 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
// Turn on clock to SERCOM7
sam.MCLK.APBDMASK.SetBits(sam.MCLK_APBDMASK_SERCOM7_)
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_SERCOM7_CORE].Set((sam.GCLK_PCHCTRL_GEN_GCLK1 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
}