nrf: add SoftDevice support for the Circuit Playground Bluefruit

aykevl · deadprogram · commit 47a975a44f6a · 2020-08-30T16:16:31.000+02:00
This also fixes a bug: the Bluefruit doesn't have a low frequency
crystal. Somehow non-SoftDevice code still worked. However, the
SoftDevice won't initialize when this flag is set incorrectly.
diff --git a/src/machine/board_circuitplay_bluefruit.go b/src/machine/board_circuitplay_bluefruit.go
@@ -2,7 +2,7 @@
 
 package machine
 
-const HasLowFrequencyCrystal = true
+const HasLowFrequencyCrystal = false
 
 // GPIO Pins
 const (
diff --git a/targets/circuitplay-bluefruit.json b/targets/circuitplay-bluefruit.json
@@ -1,6 +1,6 @@
 {
     "inherits": ["nrf52840"],
-    "build-tags": ["circuitplay_bluefruit","nrf52840_reset_uf2"],
+    "build-tags": ["circuitplay_bluefruit","nrf52840_reset_uf2", "softdevice", "s140v6"],
     "flash-1200-bps-reset": "true",
     "flash-method": "msd",
     "msd-volume-name": "CPLAYBTBOOT",
diff --git a/targets/circuitplay-bluefruit.ld b/targets/circuitplay-bluefruit.ld
@@ -7,4 +7,7 @@ MEMORY
 
 _stack_size = 2K;
 
+/* This value is needed by the Nordic SoftDevice. */
+__app_ram_base = ORIGIN(RAM);
+
 INCLUDE "targets/arm.ld"

Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"inherits": ["nrf52840"],`
`3`		`- "build-tags": ["circuitplay_bluefruit","nrf52840_reset_uf2"],`
	`3`	`+ "build-tags": ["circuitplay_bluefruit","nrf52840_reset_uf2", "softdevice", "s140v6"],`
`4`	`4`	`"flash-1200-bps-reset": "true",`
`5`	`5`	`"flash-method": "msd",`
`6`	`6`	`"msd-volume-name": "CPLAYBTBOOT",`